#!/usr/bin/perl

# before anything else, the script needs to find out its own name
#
# some servers (notably IIS on windows) don't set the cwd to the script's
# directory before executing it.  So we get that information
# from $0 (the full name & path of the script).
BEGIN{($_=$0)=~s![\\/][^\\/]+$!!;push@INC,$_}

$name = $0;
$name =~ s/.+\/?.+\///;  # for unix
$name =~ s/.+\\.+\\//;  # for windows
$path = $0;
$path =~ s/(.+\/).+/$1/g;  # for unix
$path =~ s/(.+\\).+/$1/g;  # for windows

# The "use Cwd" method would be nice, but it doesn't work with
# some versions of IIS/ActivePerl
#use Cwd;
#$path = cwd;

if ($path ne "") {
  chdir $path;
  push @INC,$path;
}
# finished discovering name

#use Data::Dumper;

# some global variables (more further down)
local $plans_version = "7.10";        # version
local $debug_info;
local %options;
local $perl_version = (sprintf ("%vd",$^V));
#local $options{data_storage_mode};
local $fatal_error = 0;          # fatal errors cause plans to abort and print an error message to the browser
local $error_info = "";
local $html_output;
local $script_url = "";
local $messages = "";   # formatted in plain text with newlines.  Converted to html at display time.

local $template_html;
local $local_template_file = 0; # tells whether the template was loaded via a filesystem open or through a http request.
local $event_details_template;
local $list_item_template;
local $calendar_item_template;
local $upcoming_item_template;

local %calendars;
local %current_calendar;
local %latest_calendar;
local %new_calendars;
local $normalized_timezone = 0;
local $normalized_timezone_pending_events = 0;

# used when adding new entries
local $max_cal_id = 0;
local $max_event_id = 0;
local $max_series_id = 0;
local $max_user_id = 0;
local $max_action_id = 0;

# used to protect against refreshes
local $latest_cal_id = 0;
local $latest_event_id = 0;
local $latest_new_cal_id = 0;
local $latest_new_event_id = 0;

local $session;
local %users;
my $profile;
local $logged_in = 0;
local $logged_in_as_root = 0;
local $logged_in_as_current_cal_user = 0;
local $logged_in_as_current_cal_admin = 0;

local $lg_name = "";
local $lg_password = "";

local %events;
local %new_events;
local @pending_events_to_display;

local %text;
local %cookie_parms;
local $cookie_text = "";
local $cookie_header_text = "";
local $max_remote_event_id = 0;

local $options{default_template_path} = "";
local $theme_url = "";
local $options{choose_themes} = "";
local $graphics_url = "";
local $ical_export_url = "";
local $icons_url = "";
local $input_cal_id_valid = 0;
local $options{right_click_menus_enabled} = 0;
local %cal_options;

local $rightnow;
local @months;
local @months_abv;
local @day_names;
local $loaded_all_events;    # flag used to avoid calling load_events("all") twice
                             # not needed for calendars (we always load all calendars)

local @disabled_tabs;

# check for required modules.

my $module_found=0;
foreach $temp_path (@INC) {
  if (-e "$temp_path/plans_config.pl") {
$module_found=1;}
}
if ($module_found == 0) {
  $fatal_error=1;
  $error_info .= "Unable to locate <b>plans_config.pl</b>!  It should be in the same directory as plans.cgi!\n";
} else {require "plans_config.pl";}



$module_found=0;
foreach $temp_path (@INC) {
  if (-e "$temp_path/CGI") {
$module_found=1;}
}

if ($module_found == 0) {
  $fatal_error=1;
  $error_info .= "unable to locate required module <b>CGI</b>!\n";
} else {
use CGI;}

$module_found=0;
foreach $temp_path (@INC) {
  if (-e "$temp_path/CGI/Session") {
$module_found=1;}
}

if ($options{sessions} eq "1") {
  if ($module_found == 0) {

    $fatal_error = 1;
    $error_info .= "unable to locate required module <b>CGI::Session</b>!\n";
  } else {
require CGI::Session;}
}

$module_found=0;
foreach $temp_path (@INC) {
  if (-e "$temp_path/CGI/Carp.pm") {
$module_found=1;}
}

if ($module_found == 0) {
  $fatal_error=1;
  $error_info .= "unable to locate required module <b>CGI::Carp</b>!\n";
} else {
use CGI::Carp qw/fatalsToBrowser/;}

$module_found=0;
foreach $temp_path (@INC) {
  if (-e "$temp_path/Time") {
$module_found=1;}
}

if ($module_found == 0) {
  $fatal_error=1;
  $error_info .= "unable to locate required module <b>Time.pm</b>!\n";
} else {
use Time::Local;}

$module_found=0;
foreach $temp_path (@INC) {
  if (-e "$temp_path/IO.pm") {
$module_found=1;}
}
if ($module_found == 0) {
  $fatal_error=1;
  $error_info .= "unable to locate required module <b>IO.pm</b>!\n";
} else {
use IO::Socket;}

if ($fatal_error == 1)  { # print error and bail out
  &fatal_error();
}


$module_found=0;
foreach $temp_path (@INC) {
  if (-r "$temp_path/plans_lib.pl") {
$module_found=1;}
}
if ($module_found == 0) {
  $fatal_error=1;
  $error_info .= "Unable to locate <b>plans_lib.pl</b>!  It should be in the same directory as plans.cgi!\n";
} else {require "plans_lib.pl";}

# multi-language stuff
if (defined $options{language_files}) {
  my @language_files = split(',', $options{language_files});

 # pull in language files
  foreach $language_file (@language_files) {

    $module_found=0;
    foreach $temp_path (@INC) {
      if (-r "$temp_path/$language_file") {
$module_found=1;}
    }
    if ($module_found == 0) {
      $fatal_error=1;
      $error_info .= "Unable to locate language file <b>$language_file</b>!  It should be in the same directory as plans.cgi!\n";
    } else {require $language_file;}
  }

  # create a javascript file with language strings
  open (FH, "$options{default_theme_path}/$options{js_language_file}") || {$debug_info.= "unable to open file $options{default_theme_path}/$options{js_language_file}\n"};
  flock FH,2;
  my $first_lang_line=<FH>;
  close FH;

  if ($options{generate_js_lang} eq "1" || $first_lang_line !~ /$plans_version/) {
    my $lang_string = "";
    $lang_string .= "//$plans_version\n";
    $lang_string .= "var plans_lang = new Array();\n";

    # generate %lang keys
    foreach $lang_key (keys %lang) {
      if (ref $lang{$lang_key} eq "ARRAY") {
        $lang_string .= "plans_lang['$lang_key']=new Array(";
        my $first = 1;
        foreach $key (@{$lang{$lang_key}}) {
          if (!$first) {$lang_string .= ',';}
          if ($first) {$first = 0;}

          my $lang_val = &js_string($key);
          $lang_string .= "'$lang_val'";
        }
        $lang_string .= ");\n";

      } else {
        my $lang_val = &js_string($lang{$lang_key});

        $lang_string .= "plans_lang['$lang_key']='$lang_val';\n"
      }
    }

    open (FH, ">$options{default_theme_path}/$options{js_language_file}") || {$debug_info .= "unable to open file $options{default_theme_path}/$options{js_language_file} for writing!\n"};
    flock FH,2;
    print FH $lang_string;
    close FH;
  }
} else {
  $fatal_error=1;
  $error_info .= "No language files defined in plans.config!\n";
}

# check for perl version
if ( ! check_perl_version( $perl_version, '5.6' ) ) {
  $fatal_error=1;
  $error_info .= "Your version of perl ($perl_version) is too old!  Plans requires perl version 5.6 or better.\n";
}

if ($fatal_error == 1) { # print error and bail out
  &fatal_error();
}


# init cgi stuff
$q = new CGI;
if ($options{calendar_url} ne "") {
  $script_url = $options{calendar_url};
} else {
  $script_url = $q->url(-path_info>=1);
}
$script_url =~ /(.*)\//;          # remove trailing / and all text after
$script_url = $1;                 # remove trailing / and all text after

%cookie_parms = %{&extract_cookie_parms()};
my $cookie_path = $q->url( -absolute => 1 );
$cookie_path =~ s/$name$//;
$cookie_path =~ s/admin\/?$//; # This is better than using just '/'

# check if data files or tables are present
&check_data();

# fatal error?  Print error and bail out
if ($fatal_error == 1) {
&fatal_error();}


if ($theme_url eq "") { # not defined in config file
  $theme_url = "$script_url/theme";
}

if ($options{choose_themes}) {
  $chosen_url = $q->param('theme_url');
  $chosen_url = $cookie_parms{'theme_url'} if ($chosen_url eq "");
  $theme_url = $chosen_url if ($chosen_url ne "");
}

$graphics_url ="$theme_url/graphics";                      # where misc. graphics are
$ical_export_url ="$theme_url/ical";                       # where icalendar .ics files are placed 
$ical_export_url =~ s/http:\/\//$options{ical_prefix}/;	   # replace with custom prefix
$icons_url = "$theme_url/icons";                           # where icons are
$css_path = "$theme_url/plans.css";                        # css file


# globals from http parameters
my $active_tab = $q->param('active_tab') + 0; # +0 ensures numericity
$active_tab = 0 if ($active_tab > scalar @{$lang{tab_text}} - 1);

my $api_output_format = $q->param('output_format');
my $api_command = $q->param('api_command');

my $add_edit_cal_action = $q->param('add_edit_cal_action');
$add_edit_cal_action = "" if (!&contains(["add", "edit", "view_pending"],$add_edit_cal_action));  # validate

my $add_edit_event = $q->param('add_edit_event');
$add_edit_event = "" if (!&contains(["add", "edit"],$add_edit_event));  # validate

local $current_event_id = $q->param('evt_id');
$current_event_id = "" if ($current_event_id !~ /^R?\d+$/);  # validate

local $pending_event_id = $q->param('pending_event_id');
$pending_event_id = "" if ($pending_event_id !~ /^R?\d+$/);  # validate

local $cal_start_month = $q->param('cal_start_month') + 0; # +0 ensures numericity
local $cal_start_year = $q->param('cal_start_year') + 0;   # +0 ensures numericity
local $cal_num_months = $q->param('cal_num_months') + 0;   # +0 ensures numericity

# if view parameters not supplied in http request, check cookie
$cal_start_month = $cookie_parms{'cal_start_month'} if ($q->param('cal_start_month') eq "");
$cal_start_year = $cookie_parms{'cal_start_year'} if ($cal_start_year == 0);
$cal_num_months = $cookie_parms{'cal_num_months'} if ($cal_num_months  == 0);

my $special_action = $q->param('special_action');  # needs no validation - never used in output

local $display_type = $q->param('display_type') + 0;   # +0 ensures numericity
$display_type = $cookie_parms{'display_type'} if ($q->param('display_type') eq "");


$messages = $q->param('messages') if ($q->param('messages') ne "");


# other globals
my $event_start_date;
my $event_start_timestamp;
my $event_days;
my $start_mday;
my $start_mon;
my $start_year;
my @timestamp_array;

my $prev_month_link = "";
my $next_month_link = "";

# load calendar data
&load_calendars();
&load_users();
&load_actions();

local $current_cal_id = 0;

if ($q->param('cal_id') eq "") {
  $current_cal_id = $cookie_parms{'cal_id'} if ($current_cal_id == 0);
} else {
  $current_cal_id = $q->param('cal_id');
}
$current_cal_id += 0; # +0 ensures numericity

# if calendar id not supplied, but evt_id is supplied (like when viewing an event) use that event's calendar as the current calendar
#if ($current_event_id ne "")
#{
#  &load_event($current_event_id);
#
#  my %temp_current_event = %{$events{$current_event_id}};
#  if ($current_cal_id eq "")
#  {
#    $current_cal_id = $temp_current_event{cal_ids}[0];
#  }
#}

foreach $cal_id (keys %calendars) {
  if ($cal_id eq $current_cal_id) {
$input_cal_id_valid = 1;}
}

if ($current_cal_id eq "") {
$input_cal_id_valid = 0;}

if ($current_cal_id =~ /\D/) {
$input_cal_id_valid = 0;}

$current_cal_id = 0 if ($current_event_id eq "" &&  !$input_cal_id_valid);

# make all calendars selectable by default
foreach $cal_id (keys %calendars) {
$default_cal{selectable_calendars}{$cal_id} = 1;}

%current_calendar = %{$calendars{$current_cal_id}};

# time-related globals
$rightnow = time() + 3600 * $current_calendar{gmtime_diff};
@rightnow_array = gmtime $rightnow;
$rightnow_year = $rightnow_array[5]+1900;
$rightnow_month = $rightnow_array[4];
$rightnow_mday = $rightnow_array[3];
$next_year = $rightnow_year+1;
$rightnow_description = formatted_time($rightnow, "hh:mm:ss mn md yy");

@weekday_sequence = @day_names;

# session stuff

if ($options{sessions} eq "1") {
  #$lg_name = $q->param('lg_name');
  $lg_name = $current_cal_id;
  $lg_password = $q->param('cal_password');

  &delete_old_sessions(1);  # in days

  #$debug_info .=  "plans_sid (cookie): ".$q->cookie("plans_sid")."\n";

  my $current_session_id = $q->cookie("plans_sid") || undef;


  $session = new CGI::Session(undef, $current_session_id, {Directory=>$options{sessions_directory}});
  $session->expire("+1d");

  #$debug_info .=  "current_session_id: $current_session_id\n";

  # log out?
  if ($q->param('logout') eq "1") {
    $session->delete();
    $cookie_text .= "Set-Cookie; plans_sid=deleted; path=$cookie_path;\n";
  }

  # try to match session with user id.  (If this fails, it's not really a session.)
  my $results = &init_session($q, $session);
  $profile = $session->param("~profile");

  if (defined $profile->{calendar_permissions}) {
    $logged_in = 1;
    $cookie_text .= "Set-Cookie: plans_sid=".$session->id."; path=$cookie_path;\n";
  }
}

if ($options{sessions} eq "1") {
  $logged_in_as_root = ($profile->{calendar_permissions}->{0}->{admin} eq "1") ? 1:0;
  $logged_in_as_current_cal_user = ($profile->{calendar_permissions}->{$current_cal_id}->{user} ne "") ? 1:0;
  $logged_in_as_current_cal_admin = ($profile->{calendar_permissions}->{$current_cal_id}->{admin} ne "") ? 1:0;
} elsif ($q->param('cal_password') ne "") {
  $logged_in_as_root = ($calendars{0}{password} eq crypt($q->param('cal_password'), $options{salt})) ? 1:0;
  $logged_in_as_current_cal_admin = ($current_calendar{password} eq crypt($q->param('cal_password'), $options{salt})) ? 1:0;

  foreach $user_id (keys %users) {
    my %user = %{$users{$user_id}};
    my %user_calendars = %{$user{calendars}};
    foreach $user_cal_id (keys %user_calendars) {
      if ($user_cal_id eq $current_cal_id && $user{calendars}{$user_cal_id}{edit_events} eq "1" &&
          $user{password} eq crypt($q->param('cal_password'), $options{salt})) {
        $logged_in_as_current_cal_user = 1;
        last;
      }
      last if ($logged_in_as_current_cal_user == 1);
    }
    last if ($logged_in_as_current_cal_user == 1);
  }
}

$logged_in_as_current_cal_user = 0 if (!$options{users}) ;

#$debug_info .=  "init_session results: $results\n";
#$debug_info .=  "logged-in: ".$session->param("~logged-in")."\n";
#$debug_info .=  "session id: ".$session->id."\n";
#$debug_info .=  "profile user_id: ".$profile->{calendar_permissions}->{$current_cal_id}."\n";

#$debug_info .=  "options{sessions}: $options{sessions}\n";
#$debug_info .=  "logged_in_as_root: $logged_in_as_root\n";
#$debug_info .=  "logged_in_as_current_cal_user: $logged_in_as_current_cal_user\n";
#$debug_info .=  "logged_in_as_current_cal_admin: $logged_in_as_current_cal_admin\n";
#$debug_info .=  "current_calendar{password}: $current_calendar{password}\n";
#$debug_info .=  ($profile->{calendar_permissions}->{$current_cal_id}->{admin})."\n";


# custom stylesheet?
if ($current_calendar{custom_stylesheet} ne "") {
  $css_path = "http://$current_calendar{custom_stylesheet}";
}

# if this is a custom calendar request, shoehorn the request parameters in
if ($q->param('custom_calendar') eq "1") {
  $current_cal_id = $q->param('custom_calendar_calendar') + 0;
  @custom_calendar_backgound_calendars = $q->param('custom_calendar_background_calendars');

  foreach $local_background_calendar (keys %{$calendars{$current_cal_id}{local_background_calendars}}) {
delete $calendars{$current_cal_id}{local_background_calendars}{$local_background_calendar};}

  foreach $local_background_calendar (@custom_calendar_backgound_calendars) {
$calendars{$current_cal_id}{local_background_calendars}{$local_background_calendar} = 1;}

  %current_calendar = %{$calendars{$current_cal_id}};
}




# make sure we can select the current calendar
#$current_calendar{selectable_calendars}{$current_cal_id} = 1;


# set info window height & width
$current_calendar{info_window_size} ="400x400" if ($current_calendar{info_window_size} eq ""); # default
my ($info_window_width, $info_window_height) = split("x", $current_calendar{info_window_size});


# rotate weekday_sequence by the offset defined in the week start day.
for ($l1=0;$l1 < $current_calendar{week_start_day};$l1++) {
push @weekday_sequence, (shift @weekday_sequence);}



# load background_colors
my @temp_lines = split ("\n", $event_background_colors);

foreach $temp_line (@temp_lines) {
  next if ($temp_line !~ /\w/); # skip any blank lines

  $temp_line =~ s/^\s+//;
  my ($hex_color, $hex_color_title) = split (/,*\s+/, $temp_line, 2);
  $hex_color_title = "&nbsp;" if ($hex_color_title eq "");

  push @event_bgcolors, {color => $hex_color, title => $hex_color_title};
}


#evaluate browser type and version
$_ = $ENV{HTTP_USER_AGENT};

if (/Mozilla/) {
  if (/Opera.([0-9\.]+)/) { $browser_type = 'Opera'; $browser_version=$1;} elsif (/MSIE.([0-9.]+)/) { $browser_type = 'IE'; $browser_version = $1;} elsif (/Mozilla\/([0-9\.]+)/) {$browser_type = 'Mozilla'; $browser_version=$1;
    if (($browser_version<5) || (/Netscape/)) {$browser_type = "Netscape";} }
  if (/\)[^0-9.]+[0-9]*[\/\ ]([0-9.]+)/) {$browser_version=$1;}
} elsif (/(\w+)\/([0-9\.]+)/) {$browser_type = $1; $browser_version = $2}

#evaluate, transform, tweak, adjust, modify input values
#$debug_info .= "browser type: $browser_type<br/>";



#if no month is selected, use the current month
if ($cal_start_month eq "" && $q->param('cal_start_month') eq "") {
  $cal_start_month = $rightnow_month;
  #$cal_start_month = 2;
}

#if the input year is out of range use the current year
if (($cal_start_year+0) < 1902 || ($cal_start_year+0)> 2037) {
  $cal_start_year = $rightnow_year;
}

$cal_num_months = $current_calendar{default_number_of_months} if ($cal_num_months < 1);
$cal_num_months = $current_calendar{default_number_of_months} if ($cal_num_months > $current_calendar{max_number_of_months});
$cal_num_months = 1 if ($cal_num_months > $current_calendar{max_number_of_months});
$cal_num_months = 1 if ($cal_num_months == 0);


#calculate calendar end month and year
$cal_end_month = $cal_start_month;
$cal_end_year = $cal_start_year;
for ($l1=1;$l1<$cal_num_months;$l1++) {
  $cal_end_month++;
  if ($cal_end_month == 12) {
    $cal_end_month=0;
    $cal_end_year++;
  }
}

#check to make sure num_months+cal_start_date doesn't go out of bounds
if ($cal_end_year < 1902 || $cal_end_year> 2037) {
  $cal_end_year = $cal_start_year;
  $cal_end_month = $cal_start_month;
  $cal_num_months = 1;
}

# time window for loading events

my $cal_start_timestamp = timegm(0,0,0,1,$cal_start_month,$cal_start_year) - 2592000;
my $cal_end_timestamp = timegm(0,0,0,1,$cal_end_month,$cal_end_year) + 5184000;
if ($q->param('cal_start_timestamp') ne "" && $q->param('cal_start_timestamp') !~ /\D/) {
$cal_start_timestamp = $q->param('cal_start_timestamp');}
if ($q->param('cal_end_timestamp') ne "" && $q->param('cal_end_timestamp') !~ /\D/) {
$cal_end_timestamp = $q->param('cal_end_timestamp');}


#$debug_info .="start: $cal_start_timestamp\nend: $cal_end_timestamp\nrightnow: $rightnow\n";

# load event data, for main calendar and its background calendars
my @temp_calendars = ($current_cal_id);
foreach $local_background_calendar (keys %{$current_calendar{local_background_calendars}}) {
  push @temp_calendars, $local_background_calendar;
}

my $initial_load_events = 1;
$initial_load_events = 0 if ($q->param('get_upcoming_events') eq "1");

&load_events($cal_start_timestamp, $cal_end_timestamp, \@temp_calendars) if ($initial_load_events == 1);



if ($current_event_id ne "") {
  &load_event($current_event_id);
}


# load events from remote background calendars

if (scalar keys %{$current_calendar{remote_background_calendars}} > 0) {
  $remote_calendars_status="";
  my $temp = scalar keys %{$current_calendar{remote_background_calendars}};
  foreach $remote_calendar_id (keys %{$current_calendar{remote_background_calendars}}) {
    # pull in remote calendar name
    my $remote_calendar_url = $current_calendar{remote_background_calendars}{$remote_calendar_id}{url};
    $remote_calendar_complete_url = $remote_calendar_url;
    #$debug_info .= "remote calendar: $remote_calendar_complete_url\n";

    $remote_calendar_complete_url .= "?remote_calendar_request=1&cal_id=$current_calendar{remote_background_calendars}{$remote_calendar_id}{remote_id}&cal_start_year=$cal_start_year&cal_start_month=$cal_start_month&num_months=$cal_num_months";
    #$debug_info .= "remote calendar url: $remote_calendar_complete_url\n";

    my $xml_results = &get_remote_file($remote_calendar_complete_url);

    if ($xml_results =~ /<error>/) {
      $xml_results =~ s/</&lt;/g;
      $xml_results =~ s/>/&gt;/g;

      #$debug_info .= "Error fetching remote calendar: $xml_results\n";
    } else {
      my %remote_calendar = %{&xml2hash($xml_results)};

      my $remote_cal_title = $remote_calendar{'xml'}{calendar}{title};
      my $remote_cal_gmtime_diff = $remote_calendar{'xml'}{calendar}{gmtime_diff};

      #$debug_info .= "remote_cal_gmtime_diff: $remote_cal_gmtime_diff\n";
      #my $temp = $xml_results;
      #$temp=~ s/>/&gt;/g;
      #$temp=~ s/</&lt;/g;
      #$debug_info .= "xml results: $temp\n";

      &load_remote_events($xml_results, $remote_calendar_id, $remote_cal_gmtime_diff);
    }
  }
}

# this should be done after all $current_cal_id is calculated and events are loaded.
&normalize_timezone();
&normalize_timezone_pending_events();




# calculate previous X months range.
my $previous_cal_start_month = $cal_start_month - $cal_num_months;
my $previous_cal_start_year = $cal_start_year;
if ($previous_cal_start_month < 0) {
  $previous_cal_start_year = $cal_start_year - 1 - int(abs($cal_num_months - $cal_start_month) / 12);
  $previous_cal_start_month = 12 - abs($previous_cal_start_month) % 12;
}

# for the case when num_months = 12 and start_month=0
if ($previous_cal_start_month == 12) {
  $previous_cal_start_month=0;
  $previous_cal_start_year++;
}


# singular or plural?
if ($cal_num_months > 1) {
  $prev_string = $lang{previous_months};
  $prev_string =~ s/###num###/$cal_num_months/;
} else {
  $prev_string = $lang{previous_month};
}


# calculate next X months range.
my $next_cal_start_month = $cal_start_month + $cal_num_months;
my  $next_cal_start_year = $cal_start_year;
if ($next_cal_start_month > 11) {
  $next_cal_start_year = $cal_start_year + int(abs($cal_num_months + $cal_start_month) / 12);
  $next_cal_start_month = abs($cal_start_month + $cal_num_months) % 12;
}


# singular or plural?
if ($cal_num_months > 1) {
  $next_string = $lang{next_months};
  $next_string =~ s/###num###/$cal_num_months/;
} else {
  $next_string = $lang{next_month};
}




if ($q->param('diagnostic_mode') eq "1") {
  my $diagnostic_results = &diagnostic_info;


  $html_output = <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Diagnostic mode</title>
</head>
<body style="font-family: arial;">


<h2>Plans Diagnostic information</h2>
<p>
$diagnostic_results

</p><p>
<b>Debug info:</b><br/>
<div style="color=:#0000ff;">
$debug_info
</div>
</body>
</html>

p1

  print $html_output;

  exit(0);
}

if ($q->param('detect_remote_calendars') eq "1") {
  &detect_remote_calendars();
  exit(0);
}

if ($q->param('remote_calendar_request') eq "1") {
  &remote_calendar_request();
  exit(0);
}

if ($q->param('add_edit_user') eq "1") {
  &add_edit_user();
  exit(0);
}
if ($q->param('add_new_ical') eq "1") {
  &add_new_ical();
  exit(0);
}

if ($q->param('js_login') eq "1") {
  &js_login();
  exit(0);
}

if ($q->param('manage_pending_events') eq "1") {
  &manage_pending_events();
  exit(0);
}

if ($q->param('export_calendar') eq "1") {
  if ($q->param('export_type') eq "ascii_text") {
    &ascii_text_cal($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
    exit(0);
  } elsif ($q->param('export_type') eq "csv_file") {
    &csv_file($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
    exit(0);
  } elsif ($q->param('export_type') eq "csv_file_palm") {
    &csv_file_palm($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
    exit(0);
  } elsif ($q->param('export_type') eq "vcalendar") {
    &vcalendar_export_cal($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
    exit(0);
  } elsif ($q->param('export_type') eq "icalendar") {

    my $html_output =<<p1;
Cache-control: no-cache,no-store,private
Content-disposition: filename="events.ics"
Content-Type: text/calendar; charset=$lang{charset}

p1

    $html_output .= &icalendar_export_cal($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
    print $html_output;
    exit(0);
  }
}

if ($q->param('export_event') eq "1") {
  if ($q->param('export_type') eq "ascii_text") {
    &ascii_text_event();
    exit(0);
  } elsif ($q->param('export_type') eq "icalendar") {
    &icalendar_export_event();
    exit(0);
  } elsif ($q->param('export_type') eq "vcalendar") {
    &vcalendar_export_event();
    exit(0);
  }
} elsif ($q->param('get_upcoming_events') eq "1") {
  &get_upcoming_events();
  exit(0);
} elsif ($api_command ne "") {
  if ($api_command eq "delete_event") {
    &api_add_delete_events();
    exit(0);
  }
} elsif ($q->param('view_event') eq "1") {
  &load_templates();
  &view_event();
  exit(0);
} elsif ($q->param('view_pending_event') eq "1") {
  &load_templates();
  my %pending_event = %{$new_events{$pending_event_id}};
  &view_pending_event(\%pending_event);
  exit(0);
} elsif ($q->param('email_reminder') eq "1") {
  &load_templates();
  &email_reminder_prompt();
  exit(0);
} elsif ($q->param('email_reminder_confirm') eq "1") {
  &load_templates();
  &email_reminder_confirm();
  exit(0);
} elsif ($special_action eq "preview_event") {
  &load_templates();
  &preview_event();
  exit(0);
} elsif ($special_action eq "preview_date") {
  &load_templates();
  &preview_date();
  exit(0);
} elsif ($q->param('validate_event') eq "1") {
  &validate_event();
  exit(0);
}


#load templates
&load_templates();



# ssi-style includes in the template
if ($local_template_file) {
  my $new_html = $template_html;

  $template_html =~ s/###include\s+(.+)###/&load_file($1)/ge;

  #while ($new_html =~ s/###include\s+(.+)###//g)
  if(0) {
    my $include_file=$1;
    if (-e $include_file) {
      open (FH, "$include_file") || ($debug_info .="<br/>unable to open include file $include_file for reading<br/>");
      flock FH,2;
      my @include_lines=<FH>;
      close FH;
      $include_html = join "", @include_lines;
    }
    $template_html =~ s/###include\s+(.+)###/$include_html/;
  }
}




if($options{choose_themes}) {
  my $theme_file="choose_theme.html";
  my $theme_html="";
  if (-e $theme_file) {
    open (FH, "$theme_file") || ($debug_info .="<br/>unable to open theme file $theme_file for reading<br/>");
    flock FH,2;
    my @theme_lines=<FH>;
    close FH;
    $theme_html = join "", @theme_lines;
  }
  $template_html =~ s/###choose theme###/$theme_html/;
} else {
  $template_html =~ s/###choose theme###//;
}




  my $view_cookie = &xml_store($cal_start_month, "cal_start_month");
  $view_cookie .= &xml_store($cal_start_year, "cal_start_year");
  $view_cookie .= &xml_store($cal_num_months, "cal_num_months");
  $view_cookie .= &xml_store($current_cal_id, "cal_id");
  $view_cookie .= &xml_store($display_type, "display_type");

  $cookie_text .= "Set-Cookie: plans_view=$view_cookie; path=$cookie_path;\n";
  $cookie_header_text = $cookie_text;

  #$debug_info .= "cookie: $cookie_header_text\n";

  $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}
###cookie_text###

$template_html
p1


  $html_output =~ s/###current calendar title###/$current_calendar{title}/g;
  $html_output =~ s/###current calendar details###/$current_calendar{details}/g;
  $html_output =~ s/###calendar\{(\d+)\}\{(.+?)\}###/$calendars{$1}{$2} if ($2 ne 'admin_password')/ge;
  $html_output =~ s/###event\{(\d+)\}\{(.+?)\}###/$events{$1}{$2}/ge;

  $insert_text =<<p1;
<script  type="text/javascript" src="$theme_url/plans.js"></script>
<script  type="text/javascript" src="$theme_url/plans_lang.js"></script>
<script type="text/javascript" ><!--

//###common javascript###
//###page-specific javascript###
//-->
</script>
p1
  chomp $insert_text;
  $html_output =~ s/###javascript stuff###/$insert_text/;

  # sneak in the color select javascript before all other javascript.
  my $temp =<<p1;
<script  type="text/javascript" src="$theme_url/lpd.js"></script>
<script  type="text/javascript" src="$theme_url/color_select.js"></script>
p1
  $html_output =~ s/(<script)/$temp$1/;


#default page
&display_default();

exit(0);




sub display_default {
  my $common_javascript = "";
  my $page_javascript = "";
  my $browser_javascript = "";

  chomp $insert_text;
  $html_output =~ s/###css file###/$css_path/g;

  # tab menu stuff
 $menu_tabs[0] = {status => "inactive",
                  html => "<a href=\"$script_url/$name?active_tab=0\">$lang{tab_text}[0]</a>"};
 $menu_tabs[1] = {status => "inactive",
                  html => "<a href=\"$script_url/$name?active_tab=1\">$lang{tab_text}[1]</a>"};
 $menu_tabs[2] = {status => "inactive",
                  html => "<a href=\"$script_url/$name?active_tab=2\">$lang{tab_text}[2]</a>"};

 $menu_tabs[$active_tab]{status} ="active";

 $menu_tabs[2]{html} = "<a href=\"$script_url/$name?active_tab=2\">$lang{tab_text}[2]</a>";

 $insert_text =<<p1;
<br/>
<div style="padding:0px;margin:0px;margin-left:20px;white-space:nowrap;">
p1

  # this kludge sucks!
  if ($browser_type eq "IE") {
$tab_vert_offset=4;} else {
$tab_vert_offset=0;}

  #lay out the actual menu tabs
  for ($l1=0;$l1<scalar @{$lang{tab_text}};$l1++) {
    if (&contains (\@disabled_tabs, $l1)) {
next;}
    $menu_tab = $menu_tabs[$l1];
    my $style="";

   #$tab_vert_offset=0;

   if ($$menu_tab{status} eq "active") {
     $style="top:".($tab_vert_offset-3)."px;padding-top:5px;padding-bottom:5px;margin-top:0;height:2em;";
   } else {
     $style="top:".($tab_vert_offset-3)."px;padding-top:3px;padding-bottom:4px;margin-top:1px;height:2em;";
   }
    $insert_text .=<<p1;
<span class="$$menu_tab{status}_tab" style="position:relative;border-bottom-width:0px;padding-top:5px;margin-bottom:0;margin-left:5px;margin-right:2px;white-space:nowrap;text-align:center;$style"> &nbsp; &nbsp; &nbsp; $$menu_tab{html} &nbsp; &nbsp; &nbsp; </span>
p1

    $noinsert_text .=<<p1;
<span class="$$menu_tab{status}_tab" style="position:relative;$style">$$menu_tab{html} &nbsp; &nbsp; &nbsp; </span>
p1
  }

  $insert_text .=<<p1;
</div>
p1
  chomp $insert_text;


  if ($q->param('custom_calendar') == 1) {
    $html_output =~ s/###tab menu stuff###//g;
  } else {
    $html_output =~ s/###tab menu stuff###/$insert_text/g;
  }


  $insert_text ="";

  #invisible html for context menu
    $insert_text .=<<p1;
<div id="contextmenu" class="contextmenu" style="visibility:hidden;">
</div>
p1

  #main box stuff
  $insert_text .=<<p1;
p1

  # finished displaying tab menus, now display the appropriate stuff for the selected tab

  if ($active_tab eq "0") { # tab 1 = main calendar view


    $prev_month_link .=<<p1;
<a class="prev_next" href="$script_url/$name?cal_id=$current_cal_id&cal_start_month=$previous_cal_start_month&amp;cal_start_year=$previous_cal_start_year">$prev_string</a>
p1
    $next_month_link .=<<p1;
<a class="prev_next" href="$script_url/$name?cal_id=$current_cal_id&cal_start_month=$next_cal_start_month&amp;cal_start_year=$next_cal_start_year">$next_string</a>
p1


    my $cal_controls_text =<<p1;
<div class="calendar_controls">
<form name="tab0_form" action="$script_url/$name" method="get">

<div style="float:right;margin:5px;padding:2px;vertical-align:middle;">
<input id="controls_submit_button" type="submit" value="$lang{controls_change}"/>
</div>

<div style="margin:5px;padding:2px;text-align:right;float:right;">
$lang{controls_start_month}:
<select name="cal_start_month" onChange="blink('controls_submit_button', 3, 0);">
p1
    #list each month in the year
    $month_index=0;
    foreach $possible_month (@months) {
      if ($cal_start_month eq $month_index) {
        $cal_controls_text .=<<p1;
<option value="$month_index" selected>$possible_month
p1
      } else {
        $cal_controls_text .=<<p1;
<option value="$month_index">$possible_month
p1
      }
      $month_index++;
    }
    $cal_controls_text .=<<p1;
</select>
<input name="cal_start_year" value = "$cal_start_year" size=4 onChange="blink('controls_submit_button', 3, 0);"/><br/>
$lang{controls_num_months}
<input name="cal_num_months" value = "$cal_num_months" size=3 onChange="blink('controls_submit_button', 3, 0);"/>
</div>
p1
      $cal_controls_text .=<<p1;
<div class="calendar_select" style="margin:5px;padding:2px;float:left;text-align:left;">
$lang{controls_calendar_label}<br/>
p1

    my $num_selectable_calendars = scalar keys %{$current_calendar{selectable_calendars}};

    my @selectable_calendars;
    if ($options{all_calendars_selectable}) {
      @selectable_calendars = keys %calendars;
    } else {
      @selectable_calendars = keys %{$current_calendar{selectable_calendars}};
      unshift @selectable_calendars, $current_cal_id if (!&contains(\@selectable_calendars, $current_cal_id));
    }


    if (scalar @selectable_calendars > 1) {
      $cal_controls_text .=<<p1;
<select id="cal_id" name="cal_id" onChange="blink('controls_submit_button', 3, 0);">
p1


      #list each calendar for the user to select
      my %explicit_calendar_order;
      if ($options{calendar_select_order} ne "alpha" && $options{calendar_select_order} ne "") {
        my @cal_order_ids = split(',',$options{calendar_select_order});
        my $cal_order_index = 0;

        foreach $selectable_calendar_id (@selectable_calendars) {
          $explicit_calendar_order{"$selectable_calendar_id"} = 9999999;
        }


        foreach $cal_order_id (@cal_order_ids) {
          next if ($cal_order_id eq "");

          $explicit_calendar_order{"$cal_order_id"} = $cal_order_index;
          $cal_order_index++;
        }
      }

      foreach $selectable_calendar_id (sort {
                                        if ($options{calendar_select_order} eq "alpha") {
                                          return lc $calendars{$a}{title} cmp lc $calendars{$b}{title};
                                        } elsif ($options{calendar_select_order} ne "") {
return $explicit_calendar_order{"$a"} <=> $explicit_calendar_order{"$b"} || lc $calendars{$a}{title} cmp lc $calendars{$b}{title};} else {
return $a <=> $b;}

                                      }  @selectable_calendars) {
        my $selected ="";
        $selected =" selected" if ($selectable_calendar_id eq $current_calendar{id});
        $selectable_calendar_id=~ s/\D//g;

        $cal_controls_text .=<<p1;
<option value = "$selectable_calendar_id"$selected>$calendars{$selectable_calendar_id}{title}
p1
      }

      $cal_controls_text .=<<p1;
</select>
p1
    } else {
      $cal_controls_text .=<<p1;
<span style="font-weight:bold;">$current_calendar{title}</span>
<input type="hidden" name="cal_id" value="$current_calendar{id}"/>
p1
    }
      $cal_controls_text .=<<p1;
</div>
p1


    $cal_controls_text .=<<p1;
<div style="margin:5px;padding:2px;float:left;text-align:left;">
$lang{controls_display_label}<br/>
<select name="display_type" onChange="blink('controls_submit_button', 3, 0);">
p1
    #foreach $possible_display_type (@{$options{display_types}})
    for (my $l1=0;$l1<scalar @{$options{display_types}};$l1++) {
      if ($options{display_types}[$l1] ne "1") {
next};
      my $selected="";

      if ($l1 eq $display_type) {
$selected = "selected";}

      $cal_controls_text .=<<p1;
<option value="$l1" $selected>$lang{controls_display_type}[$l1]
p1
    }
    $cal_controls_text .=<<p1;
</select>
</div>
p1



    $cal_controls_text .=<<p1;
<br style="clear:both;"/>
</form>
</div>
p1
    if ($q->param('custom_calendar') == 1) {
      $html_output =~ s/###calendar controls###//g;
    } else {
      $html_output =~ s/###calendar controls###/$cal_controls_text/g;
    }

    if ( !$logged_in && $options{force_login} ) {
      $insert_text .= &forced_login();
    } else {
      $insert_text .= &do_calendar_list_view();
    }

    #select event range

    $cal_month_start_date = timegm(0,0,0,1,$cal_start_month,$cal_start_year);
    @cal_month_start_date_array = gmtime $cal_month_start_date;

    $events_start_timestamp = $cal_month_start_date - 604800;                            # +7 day margin
    $events_end_timestamp = &find_end_of_month($cal_end_month, $cal_end_year) + 604800;  # +7 day margin

    #now that we have selected the appropriate events, we can
    #generate the corresponding javascript and calendar view
    #and insert/add it to the html output.
    $page_javascript .= &calendar_view_javascript($events_start_timestamp, $events_end_timestamp);

    #replace javascript placeholders with actual html/javascript code

    $html_output =~ s/###previous month link###/$prev_month_link/g;
    $html_output =~ s/###next month link###/$next_month_link/g;

  } elsif ($active_tab eq "1") {  #the second tab is the add/edit events view
    $html_output =~ s/###calendar controls###//;

    if ( !$logged_in && $options{force_login} ) {
      $insert_text .= &forced_login();
    } else {
      my $edit_event_id = "";
      $edit_event_id = $current_event_id if ($add_edit_event eq "edit");

      if ($q->param('add_event_button') eq "" && $q->param('del_event_button') eq "") { #add event main screen

        $add_edit_event = "add" if ($add_edit_event eq "");

        $insert_text .=<<p1;
<form id="add_event_form" name="add_event_form" action="$script_url/$name" method="POST" onsubmit="return validate_event();">
<input type="hidden" name="active_tab" value="1"/>
<input type="hidden" name="special_action" value=""/>
<input type="hidden" name="add_edit_event" value="$add_edit_event"/>
<input type="hidden" name="evt_id" value="$edit_event_id"/>
p1
        $insert_text .= &add_edit_events_interface();
        $insert_text .=<<p1;
</form>
p1
      } else {
        my %results =  %{&add_edit_events()};
        my $results_html = "";

        foreach $results_message (@{$results{messages}}) {
          $results_message =~ s/\[warning\](.*)/<span class="warning">$1<\/span>/i;
          $results_message =~ s/\[error\](.*)/<span class="error">$1<\/span>/i;
          $results_message =~ s/\[status\](.*)/<span class="status">$1<\/span>/i;
          $results_html .= "<li>$results_message</li>\n";
        }

        $insert_text .= "<div style=\"text-align:left;\"><ul style=\"font-size:small;\">$results_html</ul>$results{text}</div>";
      }
    }

    #generate javascript for add/edit events page
    $page_javascript .= &add_edit_events_javascript();

  } elsif ($active_tab eq "2") {  #the third tab is for calendar information

    $html_output =~ s/###calendar controls###//;

    if ( !$logged_in && $options{force_login} ) {
      $insert_text .= &forced_login();
    } else {
      if ($add_edit_cal_action eq "") { # calendar management view
        $num_new_calendars = scalar keys %new_calendars;

        if ($num_new_calendars == 0) {
          $new_calendars_info = $lang{tab2_no_new_calendars};
        } else {
          $new_calendars_info = $lang{tab2_some_new_calendars};
          $new_calendars_info =~ s/###num###/$num_new_calendars/;
        }

        $insert_text .=<<p1;
<div>
<div class="info_box" style="margin-top:20px;float:left;padding-left:20px;padding-right:20px;text-align:left;">

<form name="view_cal_form" action="$script_url/$name" method="GET">
<input type="hidden" name = "active_tab" value="2"/>
<input type="hidden" name = "add_edit_cal_action" value="edit"/>

<select name="cal_id" id="cal_id">
p1
        foreach $cal_id (sort {$a <=> $b} keys %calendars) {
          my $selected="";
          if ($cal_id eq $current_cal_id) {
            #$debug_info .= "$cal_id<br/>";
            $selected=" selected";
          }
          $insert_text .=<<p1;
<option value = "$cal_id"$selected>$calendars{$cal_id}{title}
p1
        }

        $insert_text .=<<p1;
</select>
</form>
p1
        $writable{calendars_file} and $insert_text .=<<p1;
<a href="javascript:document.view_cal_form.submit();">$lang{tab2_edit_delete}</a>
p1
        if ($writable{pending_actions_file}) {
          $insert_text .=<<p1;
</div>

<div class="info_box" style="float:left;clear:left;width:90%;margin-top:20px;padding-left:20px;padding-right:20px;text-align:left;">
<ul>

<li><a href="$script_url/$name?active_tab=2&amp;add_edit_cal_action=add">$lang{add_new_calendar}</a></li>
p1

          if ($options{ical_import} eq "1") {
          $insert_text .=<<p1;
<li><a id="add_new_ical_link" href="javascript:add_new_ical();">$lang{add_new_ical_calendar}</a>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('add_new_ical','$lang{add_new_ical_calendar}')">$lang{help_on_this}</a></span>


</li>
p1

          }

          $insert_text .=<<p1;
<li><a href="$script_url/$name?active_tab=2&amp;add_edit_cal_action=view_pending">$lang{tab2_view_new_calendars}</a> $new_calendars_info</li>

</ul>
</div>

<br style="clear:both;"/>
</div>

p1
        }
      } elsif($add_edit_cal_action eq "add" || $add_edit_cal_action eq "edit") {  #add/edit calendars

        $insert_text .=<<p1;
<form id="update_cal_form" name="update_cal_form" action="$script_url/$name" method="POST" onsubmit="return validate_calendar();">
<input type="hidden" name="cal_id" value="$current_cal_id"/>
p1
        $insert_text .=  &add_edit_calendars();
        $insert_text .=<<p1;
</form>
p1
      } elsif ($add_edit_cal_action eq "view_pending") {  #view/approve/reject new pending calendars

        $insert_text .=  &view_pending_calendars();
      }
    }

    #generate javascript for calendar info page
    $page_javascript.= &add_edit_calendars_javascript();


  }

  #done with main active tab stuff (the stuff that's different depending
  #on which tab is active.  The following stuff is the same regardless
  #of which tab is active.

  $html_output =~ s/###calendar area###/$insert_text/g;
  $html_output =~ s/###version###/$plans_version/g;


  my $add_event_to_current_cal_text =<<p1;
<a target = "_self" href="$script_url/$name?active_tab=1&amp;cal_id=$current_cal_id">$lang{add_event_to_this_calendar}</a>
p1
  chomp $add_event_to_current_cal_text;

  my $current_calendar_options_text =<<p1;
<a target="_self" href="$script_url/$name?active_tab=2&amp;cal_id=$current_cal_id&amp;add_edit_cal_action=edit">$lang{edit_calendar_options}</a>
p1
  chomp $current_calendar_options_text;

  my $current_calendar_subscribe_text =<<p1;
<a target="_new" href="$ical_export_url/plans_calendar_$current_calendar{id}.ics">$lang{subscribe_to_this_calendar}</a>
p1
  chomp $current_calendar_subscribe_text;

  $current_calendar_subscribe_text = '' if ( $options{'ical_export'} ne "1" );

  if ($active_tab eq "0") {
    $html_output =~ s/###add event to current calendar link###/$add_event_to_current_cal_text/;
    $html_output =~ s/###edit calendar options link###/$current_calendar_options_text/;
  	
    if ( !$logged_in && $options{force_login} ) {
      $html_output =~ s/###subscribe calendar link###//g;
      $html_output =~ s/###export calendar link###//;
      $html_output =~ s/###custom calendar link###//;
    } else {
  	  $html_output =~ s/###subscribe calendar link###/$current_calendar_subscribe_text/g;
      my $temp = &export_calendar_link();
      $html_output =~ s/###export calendar link###/$temp/;

      my $custom_calendar_link =<<p1;
<a href="javascript:custom_calendar()">$lang{make_custom_calendar}</a>
p1
      chomp $custom_calendar_link;
      $html_output =~ s/###custom calendar link###/$custom_calendar_link/;

      #$debug_info .= "custom calendar link: $custom_calendar_link\n";
    }
  } else {
    $html_output =~ s/###subscribe calendar link###//g;
    $html_output =~ s/###add event to current calendar link###//;
    $html_output =~ s/###edit calendar options link###//;
    $html_output =~ s/###custom calendar link###//;
    $html_output =~ s/###export calendar link###//;
  }


  # pending event stuff
  my $plans_messages_style = ($messages eq "")? "": " style=\"display:block;\"";
  my $messages_text = "<div id=\"plans_messages\"$plans_messages_style>$messages</div>";
  $html_output =~ s/###messages###/$messages_text/;

  my $logged_in_text = &generate_logged_in_stuff();

  if ($logged_in_text ne "") {
    $logged_in_text = <<p1;
<div id="logged_in_stuff">
$logged_in_text
</div>
p1
  }

  $html_output =~ s/###logged-in stuff###/$logged_in_text/;


  $common_javascript .= &generate_pending_events_javascript() if (&pending_events_visible);
  $common_javascript .= &common_javascript();


  #replace javascript placeholders with actual html/javascript code
  $html_output =~ s/###page-specific javascript###/\n$page_javascript/;
  $html_output =~ s/###common javascript###/\n$common_javascript/;


  $debug_info = "$error_info$debug_info";

  if ($debug_info =~ /\S/) {
    $debug_info =~ s/\n/<br\/>\n/g;
    $debug_info = <<p1;
<div style="width:100%;padding:10px;margin:10px;border:solid 1px #000;background-color:#fff;">
<b>Error, Warnings, & Debug Messages:</b><br/>
$debug_info
<\/div>
p1
  }
  $html_output =~ s/###debug stuff###/$debug_info/g;
  $html_output =~ s/###cookie_text###/$cookie_header_text/;

  print $html_output;

} #********************end default view code*****************************

sub add_edit_calendars {
  my $temp="<link rel=\"stylesheet\" href=\"$theme_url/color_select.css\" type=\"text/css\">";
  $html_output =~ s/<head>/<head>\n$temp\n/;

  my $return_text = "";

  if ($q->param('update_cal_button') eq "" && $q->param('del_cal_button') eq "") {  #add/edit calendar main screen

    $add_edit_string = $lang{add_new_calendar};
    #generate html for blank (default) calendar preview window

    $cal_details = $new_calendar_default_details;
    $shared_cal_select_size = scalar keys %calendars;
    $cal_link="http://";

    if ($add_edit_cal_action ne "edit") {
%current_calendar = %default_cal;}

    $add_edit_string = "$lang{edit_calendar} ($current_calendar{title})" if ($add_edit_cal_action eq "edit");

    my %checked;
    $checked{list_background_calendars_together} = " checked" if ($current_calendar{list_background_calendars_together} eq "yes");
    $checked{background_events_display_style1} = " checked" if ($current_calendar{background_events_display_style} eq "normal");
    $checked{background_events_display_style2} = " checked" if ($current_calendar{background_events_display_style} eq "single_color");
    $checked{background_events_display_style3} = " checked" if ($current_calendar{background_events_display_style} eq "faded");

    $current_calendar{custom_stylesheet} = "http://$current_calendar{custom_stylesheet}";
    $current_calendar{custom_template} = "http://$current_calendar{custom_template}";

    $cal_details =~ s/</&lt;/g;
    $cal_details =~ s/>/&gt;/g;

    $return_text .=<<p1;

<input type="hidden" name="active_tab" value="2"/>
<input type="hidden" name="add_edit_cal_action" value="$add_edit_cal_action"/>
<input type="hidden" name="new_remote_calandars_xml" value=""/>

<p class="cal_title" style="text-align:center;">
$add_edit_string
</p>

<div class="info_box" style="text-align:center;margin-bottom:2em;float:left;">
<span class="optional_field">$lang{fields_text1} <span class="required_field">$lang{fields_text2}</span> $lang{fields_text3}</span>
</div>

<div style="width:90%;text-align:left;white-space:nowrap;clear:left;">
<a id="tab0" href="javascript:tab_show(0)" class="info_box_tab active">$lang{add_edit_calendars_tab0}</a>
<a id="tab1" href="javascript:tab_show(1)" class="info_box_tab">$lang{add_edit_calendars_tab1}</a>
<a id="tab2" href="javascript:tab_show(2)" class="info_box_tab">$lang{add_edit_calendars_tab2}</a>
<a id="tab3" href="javascript:tab_show(3)" class="info_box_tab">$lang{add_edit_calendars_tab3}</a>
p1
    if ($options{users} eq "1") {
      $return_text .=<<p1;
<a id="tab4" href="javascript:tab_show(4)" class="info_box_tab">$lang{add_edit_calendars_tab4}</a>
p1
    }

    $return_text .=<<p1;
</div>

<div id="tab_area0" class="info_box" style="width:100%;position:relative;z-index:101;padding-top:20px;">


<div class="leftcol" style="">
<label class="required_field" for="cal_title">$lang{calendar_title}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="cal_title" name="cal_title" style="width:50%;" value = "$current_calendar{title}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('title','$lang{calendar_title}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol" style="">
<label class="optional_field" for="cal_link">$lang{calendar_link}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="cal_link" name="cal_link" style="width:50%;" value = "$current_calendar{link}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('link','$lang{calendar_link}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol" style="">
<label class="optional_field" for="cal_details">$lang{calendar_details}</label>
<br/>
<span class="small_note" style="vertical-align:top;" ><a href="javascript:display_help('details','$lang{calendar_details}')">$lang{help_on_this}</a>&nbsp;&nbsp;</span>
</div>
<div class="rightcol" style="white-space:nowrap;">
<textarea name="cal_details" id="cal_details" rows=10 cols=0 style="width:100%;">
$current_calendar{details}
</textarea>
</div>


<div style="clear:both;text-align:center;padding-top:20px;padding-bottom:20px;">
<b><a href="javascript:preview_cal()">$lang{preview_calendar_details}</a></b>
</div>

<br style="clear:both;"/>&nbsp;
</div>

<div id="tab_area1" class="info_box" style="width:100%;display:none;position:relative;z-index:101;padding-top:20px;">
<div style="float:left;width:45%;text-align:left;">




<div class="lite_box">
p1
    if (scalar (keys %calendars) > 1 || $add_edit_cal_action ne "edit") {
  $return_text .=<<p1;
<label class="optional_field" style="float:left;" for="background_calendars">$lang{background_calendars3}
<span class="small_note" ><a href="javascript:display_help('background_calendars','$lang{background_calendars3}')">$lang{help_on_this}</a></span>
<br/><span class="small_note">$lang{background_calendars2}</span>
</label>
<select multiple size=8 style="display:block;clear:left;" name="background_calendars" id="background_calendars">
p1

      foreach $cal_id (sort {$a <=> $b} keys %calendars) {
        #don't display a choice for the calendar currently being edited
        if ($cal_id eq $current_calendar{id}) {
next;}

        #$debug_info .= "$current_calendar{title} local_background_calendars{$cal_id} = $current_calendar{local_background_calendars}{$cal_id}\n";
        my $selected="";

        if ($current_calendar{local_background_calendars}{$cal_id} eq "1") {
$selected = " selected";}

          $return_text .=<<p1;
<option value = "$cal_id"$selected>$calendars{$cal_id}{title}
p1
      }

      $return_text .=<<p1;
</select>
p1
    }

    $return_text .=<<p1;
</div>
<div class="lite_box">
<label class="optional_field" style="float:left;" for="remote_background_calendars">$lang{remote_background_calendars1}</label>
&nbsp;<span class="small_note" ><a href="javascript:display_help('remote_background_calendars','$lang{remote_background_calendars1}')">$lang{help_on_this}</a></span>
p1
    my $remote_calendars_status = $lang{remote_background_calendars_none};

    if (scalar keys %{$current_calendar{remote_background_calendars}} > 0) {
      $remote_calendars_status="";
      my $temp = scalar keys %{$current_calendar{remote_background_calendars}};
      if ($temp>4) {$temp=4};
      $temp = ($temp * 20)."px";

      $return_text .=<<p1;
<div class="scroll_surround" style="height:$temp;white-space:nowrap;">
p1
      foreach $remote_calendar_id (keys %{$current_calendar{remote_background_calendars}}) {
        # pull in remote calendar name
          my $remote_calendar_url = $current_calendar{remote_background_calendars}{$remote_calendar_id}{url};
          $remote_calendar_complete_url = $remote_calendar_url;

          $remote_calendar_complete_url .= "?remote_calendar_request=1&cal_id=$current_calendar{remote_background_calendars}{$remote_calendar_id}{remote_id}&cal_start_year=1971&cal_start_month=0&num_months=1";
          my $xml_results = &get_remote_file($remote_calendar_complete_url);

          if ($xml_results =~ /<error>/) {
            $xml_results =~ s/</&lt;/g;
            $xml_results =~ s/>/&gt;/g;

            $debug_info .= "Error fetching remote calendar: $xml_results\n";
          } else {
            my %remote_calendars = %{&xml2hash($xml_results)};

            my $remote_cal_title = $remote_calendars{'xml'}{calendar}{title};

            $return_text .=<<p1;
<a target="_blank" href="$remote_calendar_url?cal_id=$current_calendar{remote_background_calendars}{$remote_calendar_id}{remote_id}" style="font-size:small;">$remote_cal_title</a>
&nbsp;&nbsp;&nbsp;&nbsp;
(<input type="checkbox" name="delete_remote_calendar_$remote_calendar_id" style="margin-top:0;margin-bottom:0;padding:0;vertical-align:bottom;" value="y"/>$lang{get_remote_calendar3})
<br/>
p1
          }

      }
      $return_text .=<<p1;
</div>
p1
    }
      $return_text .=<<p1;
<div id="remote_background_calendars_status" class="small_note">$remote_calendars_status</div>
<div class="small_note"><a href="javascript:get_remote_calendars();">$lang{get_remote_calendars}</a></div>
p1
      $return_text .=<<p1;
</div> <!-- end border div -->
p1

    my $temp1="";
    my $temp2="";
    my $temp3="";
    if ($current_calendar{allow_remote_calendar_requests} =~ /y/) {
$temp1=" checked";}

    if ($current_calendar{remote_calendar_requests_require_password} =~ /y/) {
      $temp2=" checked";
      $temp3="$current_calendar{remote_calendar_requests_password}";
    }

    $return_text .=<<p1;
<div class="lite_box">
<input type="checkbox" id="allow_remote_calendar_requests" name="allow_remote_calendar_requests" value="yes" $temp1 onclick="update_remote_calendar_requests()"/>
<label class="optional_field" for="allow_remote_calendar_requests">$lang{allow_remote_calendar_requests}</label>
<br/><span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('allow_remote_calendar_requests','$lang{allow_remote_calendar_requests}')">$lang{help_on_this}</a></span>
<br/>
<input type="checkbox" id="remote_calendar_requests_require_password" name="remote_calendar_requests_require_password" value="yes" $temp2  onclick="update_remote_calendar_requests()"/>
<label class="optional_field" for="remote_calendar_requests_password">$lang{remote_calendar_requests_password1}</label>
<input type="password" id="remote_calendar_requests_password" name="remote_calendar_requests_password" value="$temp3"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('remote_calendar_requests_password','$lang{remote_calendar_requests_password1}')">$lang{help_on_this}</a></span>
</div>







</div>  <!-- end left column -->
<div style="float:left;width:45%;text-align:left;">

<div class="lite_box">
p1
    if ($options{all_calendars_selectable} eq "1") {
      $return_text.=<<p1;
<label class="optional_field" style="float:left;">$lang{selectable_calendars1}</label>
<br/><span class="small_note">($lang{selectable_calendars3})</span>
<br style="clear:both;"/>&nbsp;
p1

    } else {
      if (scalar (keys %calendars) > 1 || $add_edit_cal_action ne "edit") {
  $return_text .=<<p1;
<label class="optional_field" style="float:left;" for="selectable_calendars">$lang{selectable_calendars1}
<br/><span class="small_note">$lang{selectable_calendars2}</span>
<span class="small_note" style="margin-left:1em;white-space:nowrap;"><a href="javascript:display_help('selectable_calendars','$lang{selectable_calendars1}')">$lang{help_on_this}</a></span>
</label>
<select multiple size=8 style="display:block;clear:left;" name="selectable_calendars" id="selectable_calendars">
p1
        foreach $cal_id (sort {$a <=> $b} keys %calendars) {
          #don't display a choice for the calendar currently being edited
          next if ($cal_id eq $current_calendar{id});

          my $selected="";

          if ($current_calendar{selectable_calendars}{$cal_id} eq "1" || $add_edit_cal_action eq "add") {
$selected = " selected";}

          $return_text .=<<p1;
<option value = "$cal_id"$selected>$calendars{$cal_id}{title}
p1
        }
        $return_text .=<<p1;
</select>
p1
      }

      if ($options{new_calendars_automatically_selectable} eq "1") {
        my $temp="";
        if ($current_calendar{new_calendars_automatically_selectable} =~ /y/) {
$temp=" checked";}
        $return_text .=<<p1;
<div style="margin-top:2ex;">
<input type="checkbox" id="new_calendars_automatically_selectable" name="new_calendars_automatically_selectable" value="y" $temp/>
<label class="optional_field" for="new_calendars_automatically_selectable">$lang{new_calendars_automatically_selectable}</label>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('new_calendars_automatically_selectable','$lang{new_calendars_automatically_selectable}')">$lang{help_on_this}</a></span>
</div>
p1
      }
    }

      $return_text .=<<p1;
</div>

<div class="lite_box">
<input type="checkbox" id="list_background_calendars_together" name="list_background_calendars_together" value = "yes" $checked{list_background_calendars_together}/>
<label class="optional_field" for="list_background_calendars_together">$lang{bg_events_display_style8}</label>
<br/><span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('list_background_calendars_together','$lang{bg_events_display_style8}')">$lang{help_on_this}</a></span>
</div>

</div> <!--end right column-->

<br style="clear:both;"/>&nbsp;
</div>




<div id="tab_area2" class="info_box" style="width:100%;display:none;position:relative;z-index:101;padding-top:20px;">

<div style="float:left;width:45%;text-align:left;">
<div class="lite_box">

<div class="optional_field">
$lang{cal_events_display_style1}
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('events_display_style','$lang{bg_events_display_style1}')">$lang{help_on_this}</a></span>
</div>

<div style="clear:left;margin-top:2em;">
<label class="optional_field" for="cal_events_display_style2">$lang{cal_events_display_style2}</label>
<input name="dummy" value="" size=1 style="display:none;">
<select id="calendar_events_color" name="calendar_events_color" value = "" style="margin-left:27px;width:10ex;" onChange="update_cal_color_select_box();" onKeyPress="if (event.keyCode == 13){return false;}">
<option value="" style="background-color:#fff;">none</option>
p1
      my $custom_color=1;
      #update_bg_color_select_box()cs1.setrgb(this.value);

      foreach $temp (@event_bgcolors) {
        %possible_bgcolor = %{$temp};
        my $selected="";
        if ($possible_bgcolor{color} eq "$current_calendar{calendar_events_color}") {  #default
          $custom_color=0;
          $selected=" selected";
        }
        my $description = "";
        $description = $possible_bgcolor{title} if ($options{show_event_background_color_descriptions});

        $return_text .=<<p1;
<option value = "$possible_bgcolor{color}" style="background-color:$possible_bgcolor{color};"$selected>$description
p1
      }

      my $color_select_icon_style="visibility:hidden;";
      if ($custom_color == 1 && $current_calendar{calendar_events_color} ne "") {
        $color_select_icon_style="";
        $return_text .=<<p1;
<option id="custom_evt_color" value = "$current_calendar{calendar_events_color}" selected style="background-color:$current_calendar{calendar_events_color};">$lang{event_background_colorcustom}
p1
      } else {
        $return_text .=<<p1;
<option id="custom_evt_color" value="#ffffff" style="background-color:#fff;">$lang{event_background_colorcustom}
p1
      }

      $return_text .=<<p1;
</select>



<span id="color_select_icon1" class="color_select_icon" style="$color_select_icon_style vertical-align:top;background-image:url($graphics_url/color_select_icon.gif);" onclick="cs1.attach_to_element(this);cs1.toggle_color_select();">&nbsp;&nbsp;&nbsp;&nbsp;</span>
</div>

</div>
</div> <!-- end left column -->

<div style="float:left;width:45%;text-align:left;">



<div class="lite_box">
<div class="optional_field">
$lang{bg_events_display_style1}
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('background_events_display_style','$lang{bg_events_display_style1}')">$lang{help_on_this}</a></span>
</div>

<div style="clear:left;margin-top:1em;" onClick="document.update_cal_form.background_events_display_style[0].checked=true;document.getElementById('bg_preview_e1').style.background = '#ffffcc';document.getElementById('bg_preview_e2').style.background = '#ccffff';document.update_cal_form.background_events_color.value = '';">
<input type="radio" id="background_events_display_style1" name="background_events_display_style" value = "normal" $checked{background_events_display_style1}/>
<label class="optional_field" for="background_events_display_style1">$lang{bg_events_display_style2}</label>
</div>

<div style="clear:left;margin-top:2em;" onClick="document.update_cal_form.background_events_display_style[1].checked=true;">
<input type="radio" id="background_events_display_style2" name="background_events_display_style" value = "single_color" $checked{background_events_display_style2}/>
<label class="optional_field" for="background_events_display_style2">$lang{bg_events_display_style3}</label>
<input id="background_events_color" name="background_events_color" value = "$current_calendar{background_events_color}" style="margin-left:27px;width:10ex;" onChange="cs0.setrgb(this.value);" onKeyPress="if (event.keyCode == 13){return false;}">
<span id="color_select_icon0" class="color_select_icon" style="vertical-align:top;background-image:url($graphics_url/color_select_icon.gif);" onClick="cs0.attach_to_element(this);cs0.toggle_color_select();">&nbsp;&nbsp;&nbsp;&nbsp;</span>
</div>

<div style="clear:left;margin-top:2em;" onClick="document.update_cal_form.background_events_display_style[2].checked=true;fade_preview();document.update_cal_form.background_events_color.value = ''">
<input type="radio" id="background_events_display_style3" name="background_events_display_style"  value = "faded" $checked{background_events_display_style3}/>
<label class="optional_field" for="background_events_display_style3">$lang{bg_events_display_style4}</label>
<select id="background_events_fade_factor" name="background_events_fade_factor" onChange="fade_preview();">
p1
    for ($i=1;$i<8;$i++) {
      my $selected="";
      $selected = " selected" if ($i eq $current_calendar{background_events_fade_factor});
        $return_text .=<<p1;
<option value="$i"$selected>$i\l0\% faded
p1
    }

    $return_text .=<<p1;
</select>
</div>

</div>


</div> <!-- end right column -->



<div class="lite_box" style="clear:both;">
<div style="text-align:center;margin-top:20px;" class="optional_field">$lang{bg_events_display_style5}</div>
<table class="calendar" summary="">
<tr><td class="day" style="border-bottom-width:0;">
<span class="this_month">1</span>
</td><td class="day" style="border-bottom-width:0;">
<div>2</div>
</td></tr>
<tr><td class="day" style="border-top-width:0;border-bottom-width:0;">
  <a id="preview_e1" class="event_box" href="" style="display:block;background-color:#ffffcc;">
  $lang{bg_events_display_style6}
  </a>
</td><td class="day" style="border-top-width:0;border-bottom-width:0;">
  <a id="bg_preview_e1" class="event_box background" style="display:block;background-color:#ffffcc;" href="">
  $lang{bg_events_display_style7}
  </a>
   <a id="preview_e2" class="event_box" href="" style="display:block;background-color:#ccffcc;">
  $lang{bg_events_display_style6}
  </a>
</td></tr>
<tr><td class="day" colspan=2 style="border-top-width:0;">
  <a id="bg_preview_e2" class="event_box background" style="display:block;background-color:#ccffff;text-align:center;">
  $lang{bg_events_display_style7}
  </a>
</td></tr>
</table>
</div>


<div class="lite_box" style="clear:both;">


<div class="leftcol" style="">
<label class="optional_field" for="custom_stylesheet">$lang{custom_stylesheet}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="custom_stylesheet" name="custom_stylesheet" style="width:80%;" value = "$current_calendar{custom_stylesheet}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('custom_stylesheet','$lang{custom_stylesheet}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol" style="margin-bottom:0;">
<label class="optional_field" for="custom_template">$lang{custom_template}</label>
</div>
<div class="rightcol" style="white-space:nowrap;margin-bottom:0;">
<input id="custom_template" name="custom_template" style="width:80%;" value = "$current_calendar{custom_template}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('custom_template','$lang{custom_template}')">$lang{help_on_this}</a></span>
</div>
<br style="clear:both;"/>&nbsp;

</div>


<br style="clear:both;"/>&nbsp;

</div> <!-- end tab_area2-->



<div id="tab_area3" class="info_box" style="width:100%;display:none;position:relative;z-index:101;padding-top:20px;">

<div class="leftcol" style="">
<label class="optional_field" for="default_number_of_months">$lang{default_number_of_months}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="default_number_of_months" name="default_number_of_months" value = "$current_calendar{default_number_of_months}" style="width:5ex;vertical-align:bottom;"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('default_number_of_months','$lang{default_number_of_months}')">$lang{help_on_this}</a></span>
</div>
<br style="line-height:0px;height:0px;clear:both;"/>

<div class="leftcol" style="margin-bottom:5ex;">
<label class="optional_field" for="max_months">$lang{max_months}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="max_months" name="max_months" style="width:5ex;" value = "$current_calendar{max_number_of_months}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('max_months','$lang{max_months}')">$lang{help_on_this}</a></span>
</div>
<br style="line-height:0px;height:0px;clear:both;"/>
p1

    if ($options{force_single_timezone} ne "1" || $current_calendar{id} eq "0") {
      $return_text .=<<p1;
<div class="leftcol" style="">
<label class="optional_field" for="gmtime_diff">$lang{timezone_offset}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="gmtime_diff" name="gmtime_diff" style="width:5ex;" value = "$current_calendar{gmtime_diff}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('gmtime_diff','$lang{timezone_offset}')">$lang{help_on_this}</a></span>
</div>
<br style="line-height:0px;height:0px;clear:both;"/>
p1
    }

    $return_text .=<<p1;

<div class="leftcol" style="">
<label class="optional_field" for="date_format">$lang{date_format}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="date_format" name="date_format" style="width:10ex" value = "$current_calendar{date_format}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('date_format','$lang{date_format}')">$lang{help_on_this}</a></span>
</div>
<br style="line-height:0px;height:0px;clear:both;"/>

<div class="leftcol" style="margin-bottom:5ex;">
<label class="optional_field" for="week_start_day">$lang{week_start_day}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<select id="week_start_day" name="week_start_day">
p1

    for ($i=0;$i<7;$i++) {
      my $selected="";
      $selected = " selected" if ($i eq $current_calendar{week_start_day});
        $return_text .=<<p1;
<option value="$i"$selected>$day_names[$i]
p1
    }

    $return_text .=<<p1;
</select>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('week_start_day','$lang{week_start_day}')">$lang{help_on_this}</a></span>
</div>
<br style="line-height:0px;height:0px;clear:both;"/>

<div class="leftcol" style="margin-bottom:0;">
<label class="optional_field" for="event_change_email">$lang{event_change_email}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="event_change_email" name="event_change_email" value="$current_calendar{event_change_email}"/>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('event_change_email','$lang{event_change_email}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol" style="margin-bottom:0;">
<label class="optional_field" for="popup_window_size">$lang{popup_window_size1}</label>
</div>
<div class="rightcol" style="white-space:nowrap;margin-bottom:0;">
<input id="popup_window_size" name="popup_window_size" style="width:12ex;" value="$current_calendar{info_window_size}"/>
<span class="small_note" style="vertical-align:top;">$lang{popup_window_size2}</span>
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('popup_window_size','$lang{popup_window_size1}')">$lang{help_on_this}</a></span>
</div>

<br style="line-height:0px;height:0px;clear:both;"/>
</div>
p1


  if ($options{users} eq "1") {
    $return_text .=<<p1;
<div id="tab_area4" class="info_box" style="width:100%;display:none;position:relative;z-index:101;padding-top:20px;text-align:left;">
p1

    if ($add_edit_cal_action eq "edit") {
      # list users
      $return_text .=<<p1;
<div id="select_users">
</div>
p1

      #if (document.add_event_form.evt_bgcolor[document.add_event_form.evt_bgcolor.selectedIndex].text == "custom")

      # add user?
      $return_text .=<<p1;
<span id="add_user_link">
<a href="javascript:add_edit_user();">$lang{add_user}</a>
</span>
<br/>
<span class="small_note" >
<a href="javascript:display_help('add_user','$lang{add_user} ')">$lang{help_on_this}</a>
</span>

p1

    } else {
      $return_text .=<<p1;
<div class="optional_field">$lang{no_users_on_add}</div>
p1
    }
    $return_text .=<<p1;
</div>
p1
  }

  $return_text .=<<p1;
<br style="line-height:0px;height:0px;clear:both;"/>
<br style="line-height:0px;height:0px;clear:both;"/>


<div class="info_box" style="width:100%;margin-top:40px;">
<br style="clear:both;"/>
p1


    my $need_password = 1;
    $need_password = 0 if ($options{disable_passwords} eq "1");
    $need_password = 0 if ($logged_in_as_root || $logged_in_as_current_cal_admin);

    if ($add_edit_cal_action eq "edit") {
      if ($need_password eq "1") {
        $return_text .=<<p1;
<div class="leftcol" style="clear:both;white-space:nowrap;clear:both;margin-bottom:3ex;">
<label class="required_field" for="cal_password">$lang{cal_password}</label>
</div>

<div class="rightcol" style="white-space:nowrap;">
<input type="password" name="cal_password" id="cal_password" size=12 />
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('current_password','$lang{cal_password}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol" style="white-space:nowrap;">
<label class="optional_field" for="cal_password">$lang{change_password}</label>
<br/>
<span class="small_note" ><a href="javascript:display_help('change_password','$lang{change_password}')">$lang{help_on_this}</a></span>
</div>

<div class="rightcol" style="white-space:nowrap;">
<input type="password" name="new_cal_password" id="new_cal_password" size=12 />
<span class="small_note" style="vertical-align:top;">$lang{new_password} </span>
<br/>
<input type="password" name="repeat_new_cal_password" size=12 />
<span class="small_note" style="vertical-align:top;">$lang{repeat_new_password}</span>
</div>
p1
      } elsif ($options{disable_passwords} ne "1") {
        $return_text .=<<p1;
<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
$lang{no_password_needed}
</div>
p1
      }

      $return_text .=<<p1;
<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<input name="update_cal_button" type=submit value = "$lang{update_cal_button}"/>
</div>

<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<span class="info_box_text small_note" id="preview_warning">$lang{preview_warning}</span>
</div>

<br style="clear:both;"/>


<div style="float:left;text-align:left;">
<input name="del_cal_button" class="delete_button" type="submit" value = "$lang{del_cal_button1}"
onclick="return confirm('$lang{del_cal_button2}');" />
<div id="delete_note">
<span class="small_note">
$lang{del_cal_button3}
</span>
</div>
</div>

<br style="clear:both;">
<br style="clear:both;">
p1

    } elsif ($add_edit_cal_action eq "add") {
      $return_text .=<<p1;
<input id="as" name="as" type="hidden" value=""/>
<div id="rt" style="display:none;">$rightnow</div>
p1

      if ($options{disable_passwords} ne "1") {
      
        if ($options{anonymous_calendar_requests} ne "1" && $need_password) {
          $return_text .=<<p1;
<div class="leftcol" style="clear:both;white-space:nowrap;clear:both;margin-bottom:3ex;">
<label class="required_field" for="cal_password">$lang{existing_cal_password1}</label>
<br/>$lang{existing_cal_password2}
</div>

<div class="rightcol" style="white-space:nowrap;">
<input type="password" name="cal_password" id="cal_password" size=12 />
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('current_password','$lang{cal_password}')">$lang{help_on_this}</a></span>
</div>
p1
        }
      
        $return_text .=<<p1;
<div class="leftcol" style="white-space:nowrap;">
<label class="required_field" for="new_cal_password">$lang{cal_password}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input type="password" name="new_cal_password" id="new_cal_password" size=12 />
<span class="small_note" style="vertical-align:top;">$lang{choose_password} </span>&nbsp;
<span class="small_note" style="vertical-align:top;"><a href="javascript:display_help('new_password','$lang{choose_password}')">$lang{help_on_this}</a></span>

<br/>
<input type="password" name="repeat_new_cal_password" size=12 />
<span class="small_note" style="vertical-align:top;">$lang{repeat_password} </span>
</div>
p1
      }

      $return_text .=<<p1;
<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<input name="update_cal_button" type="submit" value = "$lang{add_calendar}"/>
</div>

<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<span class="info_box_text small_note" id="preview_warning">$lang{preview_warning}</span>
</div>

<br style="clear:both;"/>
p1
    }

    $return_text .=<<p1;
</div>
p1
  } else {  #a user added/edited/deleted a calendar--do checks and perform resulting action
    my @results_messages;
    my $cal_id = $current_cal_id;    # need to validate cal id for add/edit

    my $cal_valid = 1;
    if ($q->param('del_cal_button') ne "") {
      #delete calendar

      &load_events("all");
      &normalize_timezone();

      my $del_valid=1;

      #check password.

      if ($options{disable_passwords} ne "1" && !$logged_in_as_root && !$logged_in_as_current_cal_admin) {
        $del_valid=0;
        push @results_messages,  "$lang{update_cal_error1}<b>$current_calendar{title}</b>";
      }

      # prevent delete of primary calendar
      if ($cal_id eq "0") {
        $del_valid=0;
        push @results_messages, $lang{update_cal_error2};
      }

      if ($del_valid == 1) { #actually delete the calendar.
        # first, delete all its events
        my @deleted_event_ids;
        my @updated_event_ids;
        foreach $event_id (keys %events) {
          # if the event is only on one calendar, delete it
          if (scalar@{$events{$event_id}{cal_ids}} == 1) {
            if ($events{$event_id}{cal_ids}[0] eq $cal_id) {
              push @deleted_event_ids, $event_id;}
            else {next;}
          } else { # otherwise, just remove that calendar from its cal_ids
            my $index=0;
            foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
              if ($temp_cal_id eq $cal_id) {
                break;
              }
              $index++;
            }
            splice @{$events{$event_id}{cal_ids}}, $index, 1; {
push @updated_event_ids, $event_id;}
          }
        }
        &delete_events(\@deleted_event_ids);
        &update_events(\@updated_event_ids);

        # next, delete the calendar in question
        &delete_calendar($cal_id);  # redundant in flat-file mode, needed for sql mode

        # finally, delete any references in other calendars (background calendars)
        my @cals_to_update;
        foreach $calendar_id (sort {$a <=> $b} keys %calendars) {
		      #$debug_info .= "calendar $calendar_id\n";
          if ($calendars{$calendar_id}{local_background_calendars}{$cal_id} eq "1") {
            delete $calendars{$calendar_id}{local_background_calendars}{$cal_id};
            push @cals_to_update, $calendar_id;
          }
          if ($calendars{$calendar_id}{selectable_calendars}{$cal_id} eq "1") {
            delete $calendars{$calendar_id}{selectable_calendars}{$cal_id};
            push @cals_to_update, $calendar_id;
          }
        }
        &update_calendars(\@cals_to_update);

        my $temp = $lang{update_cal_error3};
        $temp =~ s/###title###/$current_calendar{title}/;
        push @results_messages, $temp;
      }

      # properly format errors, warnings
      my @messages = split ("\n",$cal_del_results);
      $cal_del_results="";

      foreach $message (@messages) {
        $message =~ s/(.*$lang{Warning})/<span class="warning">$1<\/span>/i;
        $message =~ s/(.*$lang{Error})/<span class="error">$1<\/span>/i;
        $cal_del_results .= "$message<br/>\n";
      }

      #$results{text} = join "\n", @messages;
      $cal_del_results = "<ul style=\"font-size:small;\">$cal_del_results</ul>";

    } else {  #the user added/updated a calendar

      #check all input fields for validity
      my $cal_title = $q->param('cal_title');
      my $cal_link = $q->param('cal_link');
      my $cal_details = $q->param('cal_details');

      my @local_background_calendars = $q->param('background_calendars');
      my @selectable_calendars = $q->param('selectable_calendars');
      my $list_background_calendars_together = $q->param('list_background_calendars_together');
      my $background_events_display_style = $q->param('background_events_display_style');
      my $background_events_fade_factor = $q->param('background_events_fade_factor');
      my $background_events_color = $q->param('background_events_color');
      my $new_calendars_automatically_selectable = "y" if ($q->param('new_calendars_automatically_selectable') =~ "y");

      my $allow_remote_calendar_requests = $q->param('allow_remote_calendar_requests');
      my $remote_calendar_requests_require_password = $q->param('remote_calendar_requests_require_password');
      my $remote_calendar_requests_password = $q->param('remote_calendar_requests_password');

      my $new_remote_calandars_xml = $q->param('new_remote_calandars_xml');
      my $calendar_events_color = $q->param('calendar_events_color');

      my $default_number_of_months = $q->param('default_number_of_months');
      my $max_number_of_months = $q->param('max_months');
      my $gmtime_diff = $q->param('gmtime_diff');
      my $date_format = $q->param('date_format');
      $date_format = lc $date_format;
      my $week_start_day = $q->param('week_start_day');
      my $event_change_email = $q->param('event_change_email');
      my $info_window_size = $q->param('popup_window_size');

      if ($info_window_size !~ /^\d{1,}x\d{1,}$/) {
        $cal_valid=0;
        my $temp=$lang{update_cal_error4};
        $temp =~ s/###size###/$info_window_size/;
        push @results_messages, $temp;
      }

      my $custom_template = $q->param('custom_template');
      $custom_template =~ s/http:\/\///g;

      my $custom_stylesheet = $q->param('custom_stylesheet');
      $custom_stylesheet =~ s/http:\/\///g;

      my $cal_password = $q->param('cal_password');
      my $new_cal_password = $q->param('new_cal_password');
      my $repeat_new_cal_password = $q->param('repeat_new_cal_password');

      $cal_title =~ s/\r//g;                 # some browsers sneak these in
      $cal_link =~ s/\r//g;                  # some browsers sneak these in
      $cal_details =~ s/\r//g;               # some browsers sneak these in


      #check for required fields
      if ($cal_title eq "") {
        $cal_valid=0;
        push @results_messages, $lang{update_cal_error5};
      }

      #strip all html from label field
      if ($cal_title =~ m/<(.*)>/) {
        push @results_messages, $lang{update_cal_error6};
        $cal_title =~ s/<(.*)>//g;
      }

      $cal_link =~ s/http:\/\///g;  #strip http:// from link field

      #check for date format
      if ($date_format !~ /^(mm|dd|yy)\W(mm|dd|yy)\W(mm|dd|yy)$/ ) {
        $cal_valid=0;
        push @results_messages, $lang{update_cal_error6_5};
      }

      if ($add_edit_cal_action eq "edit") {
        if ($options{disable_passwords} ne "1") {
          #this action is an edit of an existing calendar, so we need to make a replacement.
          if (!(defined $calendars{$cal_id})) {
            $cal_valid=0;
            push @results_messages, $lang{update_cal_error7};
          } else { #check password
            if ($options{disable_passwords} ne "1" && !$logged_in_as_root && !$logged_in_as_current_cal_admin) {
              $cal_valid=0;
              push @results_messages, "$lang{update_cal_error1} <b>$calendars{$cal_id}{title}</b>";
            }
          }

          #check for new password
          if ($new_cal_password ne "" || $repeat_new_cal_password ne "") {
            if ($new_cal_password ne $repeat_new_cal_password) {
              $cal_valid=0;
              push @results_messages, $lang{update_cal_error8};
            } else {
              $calendars{$cal_id}{password} = crypt($new_cal_password, $options{salt});
            }
          }
        }

        # check for gmtime_diff field
        if ($options{force_single_timezone} eq "1" && $cal_id ne "0") {
          $gmtime_diff = $calendars{0}{gmtime_diff}
        }

        # encrypt remote calendar password
        $remote_calendar_requests_password = crypt($remote_calendar_requests_password, $options{salt});

        if ($cal_valid == 1) {  # update calendar record
          my $xml_data = "";
          $calendars{$cal_id}{title} = $cal_title;
          $calendars{$cal_id}{details} = $cal_details;
          $calendars{$cal_id}{link} = $cal_link;
          $calendars{$cal_id}{new_calendars_automatically_selectable} = $new_calendars_automatically_selectable;
          $calendars{$cal_id}{list_background_calendars_together} = $list_background_calendars_together;
          $calendars{$cal_id}{calendar_events_color} = $calendar_events_color;
          $calendars{$cal_id}{background_events_display_style} = $background_events_display_style;
          $calendars{$cal_id}{background_events_fade_factor} = $background_events_fade_factor;
          $calendars{$cal_id}{background_events_color} = $background_events_color;
          $calendars{$cal_id}{default_number_of_months} = $default_number_of_months;
          $calendars{$cal_id}{max_number_of_months} = $max_number_of_months;
          $calendars{$cal_id}{gmtime_diff} = $gmtime_diff;
          $calendars{$cal_id}{date_format} = $date_format;
          $calendars{$cal_id}{week_start_day} = $week_start_day;
          $calendars{$cal_id}{event_change_email} = $event_change_email;
          $calendars{$cal_id}{info_window_size} = $info_window_size;
          $calendars{$cal_id}{custom_template} = $custom_template;
          $calendars{$cal_id}{custom_stylesheet} = $custom_stylesheet;
          $calendars{$cal_id}{allow_remote_calendar_requests} = $allow_remote_calendar_requests;
          $calendars{$cal_id}{remote_calendar_requests_require_password} = $remote_calendar_requests_require_password;
          $calendars{$cal_id}{remote_calendar_requests_password} = $remote_calendar_requests_password;

          # update local background calendars
          foreach $local_background_calendar (keys %{$calendars{$cal_id}{local_background_calendars}}) {
            delete $calendars{$cal_id}{local_background_calendars}{$local_background_calendar};
          }

          foreach $local_background_calendar (@local_background_calendars) {
            $calendars{$cal_id}{local_background_calendars}{$local_background_calendar} = 1;
          }

          #$debug_info .= "new remote calendars xml: $new_remote_calandars_xml\n";

          #delete existing remote background calendars
          foreach $current_remote_calendar_id (keys %{$current_calendar{remote_background_calendars}}) {
            if ($q->param("delete_remote_calendar_$current_remote_calendar_id") ne "") {
              my $temp = $lang{get_remote_calendar5};
              $temp =~ s/###remote url###/$current_calendar{remote_background_calendars}{$current_remote_calendar_id}{url}/g;
              $temp =~ s/###remote id###/$current_calendar{remote_background_calendars}{$current_remote_calendar_id}{remote_id}/g;
              push @results_messages, $temp;

              delete $calendars{$current_cal_id}{remote_background_calendars}{$current_remote_calendar_id};
            }
          }

          # update remote background calendars
          unless ($new_remote_calandars_xml eq "") {
            my %new_remote_calendars = %{&xml2hash($new_remote_calandars_xml)};
            #$debug_info .= "$new_remote_calendars{remote_calendars}{remote_calendar}\n";

            my $new_remote_cal_id = &max(keys %{$calendars{$cal_id}{remote_background_calendars}}) + 1;
            #$debug_info .= (scalar keys %{$calendars{$cal_id}{remote_background_calendars}})." remote calendars already\n";
            #$debug_info .= "new_remote_cal_id: $new_remote_cal_id\n";

            if ($new_remote_calendars{remote_calendars}{remote_calendar} =~ /array/i) { # multiple remote background calendars
              foreach $temp (@{$new_remote_calendars{remote_calendars}{remote_calendar}}) {
                my %new_remote_calendar = %{$temp};

                $found=0;
                foreach $current_remote_calendar_id (keys %{$current_calendar{remote_background_calendars}}) {
                  #$debug_info .= "comparing $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{url} with $new_remote_calendar{url}\n";
                  $found=1 if ($current_calendar{remote_background_calendars}{$current_remote_calendar_id}{url} eq $new_remote_calendar{url} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{type} eq $new_remote_calendar{type} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{version} eq $new_remote_calendar{version} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{password} eq $new_remote_calendar{password} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{remote_id} eq $new_remote_calendar{remote_id});
                }

                if ($found==0) {
                  $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{url} = $new_remote_calendar{url};
                  $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{type} = $new_remote_calendar{type};
                  $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{version} = $new_remote_calendar{version};
                  $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{password} = $new_remote_calendar{password};
                  $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{remote_id} = $new_remote_calendar{remote_id};
                  $new_remote_cal_id++;
                } else {
                  my $temp = $lang{get_remote_calendar4};
                  $temp =~ s/###remote url###/$new_remote_calendar{url}/g;
                  $temp =~ s/###remote id###/$new_remote_calendar{remote_id}/g;
                  push @results_messages, $temp;
                }

                #$debug_info .= "remote calendar: $new_remote_calendar{url}\n";
                #$debug_info .= "type: $new_remote_calendar{type}\n";
              }
            } else { # single remote background calendar

              # check against existing remote background calendars.
              my %new_remote_calendar = %{$new_remote_calendars{remote_calendars}{remote_calendar}};

              $found=0;
              foreach $current_remote_calendar_id (keys %{$current_calendar{remote_background_calendars}}) {
                #$debug_info .= "comparing $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{url} with $new_remote_calendar{url}\n";
                if ($current_calendar{remote_background_calendars}{$current_remote_calendar_id}{url} eq $new_remote_calendar{url} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{type} eq $new_remote_calendar{type} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{version} eq $new_remote_calendar{version} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{password} eq $new_remote_calendar{password} &&
                  $current_calendar{remote_background_calendars}{$current_remote_calendar_id}{remote_id} eq $new_remote_calendar{remote_id}) {
                  $found=1;
                }
              }

              if ($found==0) {
                $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{url} = $new_remote_calendar{url};
                $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{type} = $new_remote_calendar{type};
                $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{version} = $new_remote_calendar{version};
                $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{password} = $new_remote_calendar{password};
                $calendars{$cal_id}{remote_background_calendars}{$new_remote_cal_id}{remote_id} = $new_remote_calendar{remote_id};
              } else {
                my $temp = $lang{get_remote_calendar4};
                  $temp =~ s/###remote url###/$new_remote_calendar{url}/g;
                  $temp =~ s/###remote id###/$new_remote_calendar{remote_id}/g;
                push @results_messages, $temp;
              }
            }
          }

          #$calendars{$cal_id}{remote_background_calendars} = $remote_calendar_requests_password;

          # update selectable calendars
          foreach $selectable_calendar (keys %{$calendars{$cal_id}{selectable_calendars}}) {
            delete $calendars{$cal_id}{selectable_calendars}{$selectable_calendar};
          }
          foreach $selectable_calendar (@selectable_calendars) {
            $calendars{$cal_id}{selectable_calendars}{$selectable_calendar} = 1;
          }
        }

        if ($cal_valid == 1) { #all checks successful, add/update calendar!
          &update_calendar($cal_id);
          push @results_messages, "<b>$calendars{$current_cal_id}{title}</b> $lang{update_cal_success}";
        } else {
          $cal_add_results .= $lang{update_cal_failure};
        }
      } else {  # add new calendar
      
        # check password, if necessary
        if ($options{anonymous_calendar_requests} eq "1") {
            my $t1 = $q->param('as');
            my $t2 = $rightnow;
            if (abs($t1 - $t2) > 3600) {
              $cal_valid=0;
            }
        } else {
        
          if ($options{disable_passwords} ne "1" && !$logged_in_as_root && !$logged_in_as_current_cal_admin) {
            $cal_valid=0;
            push @results_messages, "$lang{update_cal_error0}";
          }
        } 
      
        #check new password
        if ($options{disable_passwords} ne "1") {
          if ($new_cal_password ne $repeat_new_cal_password) {
            $cal_valid=0;
            push @results_messages, $lang{update_cal_error9};
          } elsif ($new_cal_password eq "" || $repeat_new_cal_password eq "" ) {
            $cal_valid=0;
            push @results_messages, $lang{update_cal_error10};
          } else {
            $input_password = crypt($new_cal_password, $options{salt});
          }
        }

        my $new_cal_id;

        if ($cal_valid == 1) {
          $new_cal_id = $max_action_id + int(rand(100));  # just in case several people decide to add something new at the same time.

          $new_calendars{$new_cal_id}{id} = $new_cal_id;
          $new_calendars{$new_cal_id}{title} = $cal_title;
          $new_calendars{$new_cal_id}{details} = $cal_details;
          $new_calendars{$new_cal_id}{link} = $cal_link;
          $new_calendars{$new_cal_id}{list_background_calendars_together} = $list_background_calendars_together;
          $new_calendars{$new_cal_id}{calendar_events_color} = $calendar_events_color;
          $new_calendars{$new_cal_id}{background_events_fade_factor} = $background_events_fade_factor;
          $new_calendars{$new_cal_id}{background_events_color} = $background_events_color;
          $new_calendars{$new_cal_id}{default_number_of_months} = $default_number_of_months;
          $new_calendars{$new_cal_id}{max_number_of_months} = $max_number_of_months;
          $new_calendars{$new_cal_id}{gmtime_diff} = $gmtime_diff;
          $new_calendars{$new_cal_id}{date_format} = $date_format;
          $new_calendars{$new_cal_id}{week_start_day} = $week_start_day;
          $new_calendars{$new_cal_id}{info_window_size} = $info_window_size;
          $new_calendars{$new_cal_id}{custom_template} = $custom_template;
          $new_calendars{$new_cal_id}{custom_stylesheet} = $custom_stylesheet;
          $new_calendars{$new_cal_id}{password} = $input_password;
          $new_calendars{$new_cal_id}{update_timestamp} = $rightnow;
          $new_calendars{$new_cal_id}{allow_remote_calendar_requests} = $allow_remote_calendar_requests;
          $new_calendars{$new_cal_id}{remote_calendar_requests_require_password} = $remote_calendar_requests_require_password;
          $new_calendars{$new_cal_id}{remote_calendar_requests_password} = $remote_calendar_requests_password;

          # local background calendars
          foreach $local_background_calendar (@local_background_calendars) {
            $new_calendars{$new_cal_id}{local_background_calendars}{$local_background_calendar} = 1;
          }

          # selectable calendars
          foreach $selectable_calendar (@selectable_calendars) {
            $new_calendars{$new_cal_id}{selectable_calendars}{$selectable_calendar} = 1;
          }
        }

        # check for refreshes!
        if ($cal_valid == 1) {
          my %latest_new_calendar = $new_calendars{$latest_new_cal_id};
          if ($new_calendars{$new_cal_id}{title} eq $latest_new_calendar{title} &&
              $new_calendars{$new_cal_id}{details} eq $latest_new_calendar{details} &&
              $new_calendars{$new_cal_id}{link} eq $latest_new_calendar{link}) {
            $cal_valid = 0;
            push @results_messages, $lang{update_cal_dup};
          }
        }

        if ($cal_valid == 1) { #all checks successful, add calendar!
          &add_action($new_cal_id, "new_calendar");

          my $new_cal_details = &generate_cal_details($new_calendars{$new_cal_id});
          $new_cal_details =~ s/<a.+Delete this.+<\/a>//;
          $new_cal_details =~ s/Link directly.+<\/a>//s;

          if ($options{new_calendar_request_notify} ne "") {
            my $body = <<p1;
$lang{add_cal_email_notify1}

$new_cal_details

<a href="$script_url/$name?active_tab=2&add_edit_cal_action=view_pending">$lang{add_cal_success3}</a>

p1
            &send_email($options{new_calendar_request_notify}, $options{reply_address}, $options{reply_address}, $lang{add_cal_email_notify2}, $body);
          }

          my $temp = $lang{add_cal_success1};  # add successful
          $temp = $lang{add_cal_success4} if ($add_edit_cal_action eq "edit"); # update successful

          $cal_add_results .= <<p1;
<div style="text-align:left;">
<p style="font-weight:bold;">
$temp
</p>

<div class="info_box">
$new_cal_details
</div>

<p style="margin-top:1em;">
$lang{add_cal_success2}
</p>

<ul>
<li><a href="$script_url/$name?active_tab=2&add_edit_cal_action=view_pending">$lang{add_cal_success3}</a>
</ul>
</div>
p1
        } else {
          push @results_messages, $lang{add_cal_fail1};
        }
      }
    }
    # properly format errors & warnings
    my $message_results="";
    foreach $results_message (@results_messages) {
      $results_message =~ s/(.*$lang{Warning})/<span class="warning">$1<\/span>/i;
      $results_message =~ s/(.*$lang{Error})/<span class="error">$1<\/span>/i;
      $message_results .= "<li>$results_message</li>\n";
    }

    $cal_add_results = "<ul style=\"font-size:small;\">$message_results</ul>$cal_add_results";
  }

  $return_text .=<<p1;
<div style="text-align:left;">
$cal_add_results
$cal_del_results
</div>
p1
  return $return_text;
} #********************end add_edit_calendars code*****************************


sub view_pending_calendars {
  my $return_text = "";

  if ($q->param('approve_cal_button') eq "") {  #view pending calendars main screen

    $cal_details ="";
    $shared_cal_select_size = scalar keys %calendars;

    $return_text.=<<p1;
<p class="cal_title">
$lang{view_pending_calendars1}
</p>
p1


    if (scalar keys %new_calendars == 0) {
      $return_text.=<<p1;
<p class="optional_field">
$lang{view_pending_calendars2}
</p>
p1
    } else {
      $return_text.=<<p1;
<form name="pending_calendars_form" action="">
<input type="hidden" name="active_tab" value="2">
<input type="hidden" name="add_edit_cal_action" value="view_pending">
p1

      foreach $new_cal_id (keys %new_calendars) {
        my $new_cal_details = &generate_cal_details($new_calendars{$new_cal_id});
        $new_cal_details =~ s/<a.+Delete this.+<\/a>//;
        $new_cal_details =~ s/Link directly.+<\/a>//s;
#Link directly to this calendar:<br/>
#<a href="$script_url/$name?cal_id=$calendar{id}">$script_url/$name?cal_id=$calendar{id}</a>



        $return_text.=<<p1;
<div class="info_box" style="float:left;text-align:left;width:40%;margin:10px;clear:both;">
$new_cal_details
</div>
<div style="float:left;text-align:left;margin:10px;">
<br/>
<input type="radio" name="new_cal_$new_cal_id" value="approve"/><span class="optional_field">$lang{view_pending_calendars3}</span><br/><br/>
<input type="radio" name="new_cal_$new_cal_id" value="delete"/><span class="optional_field">$lang{view_pending_calendars4}</span><br/>
</div>
<br style="clear:both;"/>
p1
      }
      $return_text.=<<p1;
<div style="clear:both;">

<label for="main_password" class="optional_field">
$calendars{0}{title} Password:
</label>
<input type=password id="main_password" name = "main_password" size=10>
<br/>
<input type=submit name="approve_cal_button" value = "$lang{view_pending_calendars5}">
</form>
</div>

p1
    }
  } else {  #view pending calendars approve/delete results screen

    my @pending_calendars_to_delete;
    my @calendars_to_add;
    my @calendars_to_update;

    $cal_details ="";
    $shared_cal_select_size = scalar keys %calendars;

    $return_text.=<<p1;
<p class="cal_title">
$lang{view_pending_calendars6}
</p>
p1

    #check password
    $input_password = crypt($q->param('main_password'), $options{salt});

    if ($options{disable_passwords} ne "1") {
      if ($input_password ne $master_password) {
        $return_text .=<<p1;
<ul>
<li>$lang{view_pending_calendars7}</li>
</ul>
p1
        return $return_text;
      }
    }

    #go through each new calendar in the new calendars file--take appropriate action
    foreach $new_cal_id (keys %new_calendars) {
      my $new_cal_details = &generate_cal_details($new_calendars{$new_cal_id});

      if ($q->param("new_cal_$new_cal_id") eq "approve") {
        $max_cal_id+=1; #calculate new id # for the new calendar

        foreach $cal_id (keys %calendars) {
          if ($calendars{$cal_id}{new_calendars_automatically_selectable} =~ "y") {
            $calendars{$cal_id}{selectable_calendars}{$max_cal_id} = 1;
            push @calendars_to_update, $cal_id;
          }
        }

        $calendars{$max_cal_id} = $new_calendars{$new_cal_id};
        $calendars{$max_cal_id}{id} = $max_cal_id;

        # make sure the calendar can select itself.
        $calendars{$max_cal_id}{selectable_calendars}{$max_cal_id} = 1 if (scalar keys %{$calendars{$max_cal_id}{selectable_calendars}} > 0);

        delete $new_calendars{$new_cal_id};
        push @pending_calendars_to_delete, $new_cal_id;
        push @calendars_to_add, $max_cal_id;

        $approve_or_delete_result = $lang{view_pending_calendars8};
      } elsif ($q->param("new_cal_$new_cal_id") eq "delete") {
        delete $new_calendars{$new_cal_id};
        push @pending_calendars_to_delete, $new_cal_id;
        $approve_or_delete_result = $lang{view_pending_calendars9};
      } else {
        $approve_or_delete_result = $lang{view_pending_calendars10};
      }


      $new_cal_details =~ s/<a.+Delete this.+<\/a>//;
      $new_cal_details =~ s/Link directly.+<\/a>//s;

      $return_text .= <<p1;
<div style="float:left;clear:left;width:90%;">
<div class="info_box" style="text-align:left;width:40%;margin:10px;clear:both;float:left;">
$new_cal_details
</div>
<div style="text-align:left;margin:10px;float:left;">
<br/>
$approve_or_delete_result
</div>
</div>
p1
    }

    &delete_pending_actions(\@pending_calendars_to_delete);
    &add_calendars(\@calendars_to_add);
    &update_calendars(\@calendars_to_update);
  }

  $return_text.=<<p1;
<br style="clear:both;"/>
p1

  return $return_text;

} #********************end view_pending_calendars code*****************************


sub do_calendar_list_view() {
  my $return_text = "";

  if ($cal_num_months> 1) {
    $cal_title_string .=<<p1;
$months[$cal_start_month] $cal_start_year  - $months[$cal_end_month] $cal_end_year
p1
  } else {
    $cal_title_string .=<<p1;
$months[$cal_start_month] $cal_start_year
p1
  }

  # previous and next month(s) link
  $return_text .=<<p1;
<div style="text-align:center;white-space:nowrap;">
$prev_month_link
<span class="cal_title" style="margin-left:3em;margin-right:3em;">
$cal_title_string
</span>
$next_month_link
</div>


<div style="clear:both;margin:auto;">
p1

  if ($display_type == 1) { #list view

    $return_text .= &render_list($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
  } else {  #calendar view

    $return_text .= &render_calendar($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year);
  }
    $return_text .=<<p1;
</div>
p1

  return $return_text;

}  ###############end do_calendar_list_view ###################


sub add_edit_events_interface() {
  my $temp="<link rel=\"stylesheet\" href=\"$theme_url/color_select.css\" type=\"text/css\">";
  $html_output =~ s/<head>/<head>\n$temp\n/;

  my $return_text = "";
  $add_edit_event = "add" if ($add_edit_event eq "");

  $add_edit_string = $lang{add_or_edit1};
  $event_details ="";

  $event_start_date = $current_calendar{date_format};

  if ($q->param('add_date_timestamp')+0 == 0) {  # no date supplied--generic add event
  # no date supplied--generic add event
    if ($cal_start_year ne "") {
      $event_start_date =~ s/yy/$cal_start_year/;
    } else {
      $event_start_date =~ s/yy/$rightnow_year/;
    }
  } else {  # add event on a particular date -- calculate date
    my @event_start_date_array = gmtime $q->param('add_date_timestamp');
    my $mm = $event_start_date_array[4]+1;
    my $md = $event_start_date_array[3];
    my $yy = $event_start_date_array[5]+1900;

    $event_start_date =~ s/mm/$mm/;
    $event_start_date =~ s/dd/$md/;
    $event_start_date =~ s/yy/$yy/;
  }

  my $recur_end_date = $current_calendar{date_format};
  $recur_end_date =~ s/mm/12/;
  $recur_end_date =~ s/dd/31/;
  $recur_end_date =~ s/yy/$rightnow_year/;

  $event_days = "1";
  $event_icon = "blank";
  my %current_event;

  my $unit_number_text = "";
  my $event_unit_number = "";

  $add_edit_string = $lang{add_or_edit2} if ($add_edit_event eq "edit");

  if ($current_event_id ne "") {
    #select the appropriate event to edit
    %current_event = %{$events{$current_event_id}};
    @current_cal_ids = @{$current_event{cal_ids}};
    %current_calendar = %{$calendars{$current_cal_ids[0]}};
    #$cal_title=$calendars{$current_event{cal_id}}{title};

    $event_name = $current_event{title};
    $event_details = $current_event{details};

    $event_start_date = $current_calendar{date_format};
    my @temp_date = gmtime($current_event{start});
    $temp_date[5] += 1900;
    $temp_date[4] += 1;

    $event_start_date =~ s/mm/$temp_date[4]/;
    $event_start_date =~ s/dd/$temp_date[3]/;
    $event_start_date =~ s/yy/$temp_date[5]/;

    $event_days=$current_event{days};
    $event_icon = $current_event{icon};
    $event_bgcolor = $current_event{bgcolor};
    $event_unit_number = $current_event{unit_number};
    $unit_number_text = $event_unit_number;
    $unit_number_text =~ s/(\d)/<img src="$graphics_url\/unit_number_patch_$1_16x10.gif" alt="" border="0" vspace=0 hspace=0>/g;
  }

  $return_text .=<<p1;
<p class="cal_title" style="text-align:center;">
$add_edit_string
</p>

<div class="info_box" style="text-align:center;margin-bottom:2em;float:left;">
<span class="optional_field">$lang{fields_text1} <span class="required_field">$lang{fields_text2}</span> $lang{fields_text3}</span>
</div>

<div style="clear:both;width:90%;text-align:left;white-space:nowrap;clear:left;">
<a id="tab0" href="javascript:tab_show(0)" class="info_box_tab active">$lang{add_edit_events_tab0}</a>
<a id="tab1" href="javascript:tab_show(1)" class="info_box_tab">$lang{add_edit_events_tab1}</a>
</div>

<div id="tab_area0" class="info_box" style="width:100%;position:relative;z-index:101;padding-top:1em;margin-bottom:1em;">
p1
  my @selectable_cal_ids;

  if ($options{all_calendars_selectable}) {
    @selectable_cal_ids = keys %calendars;
  } else {
    @selectable_cal_ids = keys %{$current_calendar{selectable_calendars}};
    push @selectable_cal_ids, $current_cal_id;
  }

  my %evt_calendar = %{$calendars{$current_cal_id}};
  %evt_calendar = %{$calendars{$current_event{cal_ids}[0]}} if ($add_edit_event eq "edit");

  if ($add_edit_event eq "edit" || scalar @selectable_cal_ids == 0)  { # force event calendar
    $return_text .=<<p1;
<input type="hidden" name="cal_id" value="$evt_calendar{id}">
<div class="leftcol">
<span class="optional_field">$lang{event_calendar}</span>
</div>
<div class="rightcol" style="padding-left:.5em;">
$evt_calendar{title}
p1
  } else  { # user can select event calendar
    $return_text .=<<p1;
<div class="leftcol">
<span class="required_field">$lang{event_calendar}</span>
</div>
<div class="rightcol">
<select name="cal_id" id="cal_id">
p1

    foreach $cal_ref_id (sort {$calendars{$a}{title} cmp $calendars{$b}{title}} @selectable_cal_ids) {
      my $selected = "";
      $selected = " selected" if ($cal_ref_id eq $evt_calendar{id});
      $return_text .=<<p1;
<option value = "$cal_ref_id"$selected>$calendars{$cal_ref_id}{title}
p1
    }

  $return_text .=<<p1;
</select>
<span class="small_note"><a href="javascript:display_help('evt_cal_id','$lang{event_calendar}')">$lang{help_on_this}</a></span>
p1
  }

  if ($options{allow_merge_blocking}) {

  	my $block_merge_checked = ($current_event{block_merge} eq "1") ? " checked" : "";

  	$return_text .=<<p1;
&nbsp;&nbsp;&nbsp;&nbsp;<input type="checkbox" name="evt_block_merge" id=evt_"block_merge" value="1"$block_merge_checked/>
<span class="optional_field">$lang{block_merge}</span>
p1
  }


  $return_text .=<<p1;
</div>
p1

  if ($options{multi_calendar_event_mode} > 0 && $add_edit_event eq "edit") {
    $return_text .=<<p1;
<div class="leftcol">
<span class="optional_field">$lang{event_other_calendars}</span>
</div>
<div class="rightcol" style="padding-left:.5em;">
<select multiple name="evt_other_cal_ids">
p1

    foreach $cal_ref_id (sort {$calendars{$a}{title} cmp $calendars{$b}{title}} @selectable_cal_ids) {
      my $selected = "";
      next if ($cal_ref_id eq $evt_calendar{id});

      foreach $selected_cal_id (@{$events{$current_event_id}{cal_ids}}) {
        if ($cal_ref_id eq $selected_cal_id) {
          $selected = " selected";
          last;
        }
      }

      $return_text .=<<p1;
<option value = "$cal_ref_id"$selected>$calendars{$cal_ref_id}{title}
p1
    }

  $return_text .=<<p1;
</select>
<span class="small_note"><a href="javascript:display_help('evt_other_cal_ids','$lang{event_other_calendars}')">$lang{help_on_this}</a></span>
</div>
p1
  }

  my $all_day_event_checked = "";

  if ($options{new_events_all_day}) {
$all_day_event_checked = "checked";}

  my $event_start_time = $options{default_event_start_time};
  my $event_end_time = $options{default_event_end_time};

  if ($current_event_id ne "") {
    $all_day_event_checked = "checked";
    $all_day_event_checked = "" if ($current_event{all_day_event} ne "1");
    $event_start_time = &formatted_time($current_event{start},"hh:mm ampm");
    $event_end_time = &formatted_time($current_event{end},"hh:mm ampm");
    $event_end_time = "" if ($current_event{no_end_time} eq "1");
  }



  my $all_day_event_toggle0_style = "display:none;";
  if ($all_day_event_checked ne "checked") {
    $all_day_event_toggle0_style = "";
  }

  my $edit_title = &escapequotes($current_event{title});
  $return_text .=<<p1;
<div class="leftcol" style="">
<label class="required_field" for="evt_title">$lang{event_title}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="evt_title" name="evt_title" style="width:50%;" value = "$edit_title">
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('evt_title','$lang{event_title}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol" style="">
<label class="optional_field" for="evt_details">$lang{event_details}</label>
<br/>
<span class="small_note" style="vertical-align:top;" ><a href="javascript:display_help('evt_details','$lang{event_details}')">$lang{help_on_this}</a>&nbsp;&nbsp;</span>
</div>
<div class="rightcol" style="white-space:nowrap;">
<textarea name="evt_details" id="evt_details" rows=10 cols=0 style="width:100%;">$current_event{details}</textarea>
</div>

<div class="leftcol" style="margin-bottom:0;">
<label class="required_field" for="evt_start_date">$lang{event_start}</label>
</div>
<div class="rightcol" style="margin-bottom:0;white-space:nowrap;">
<input id="evt_start_date" name="evt_start_date" style="width:7em;" value = "$event_start_date" onchange="validate_event_date();">
<span id="evt_start_date_warning" class="small_note"></span>
</div>

<div class="leftcol" style="">
<label class="required_field" for="evt_days">$lang{event_length}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input id="evt_days" name="evt_days" style="width:2em;" value = "$event_days">
<input type="checkbox" id="all_day_event" name="all_day_event" value="1"$all_day_event_checked onChange="all_day_event_toggle(this.checked);">
<label class="optional_field" for="all_day_event">$lang{all_day_event}</label>
</div>

<div id="all_day_event_toggle0" style="$all_day_event_toggle0_style">
<div class="leftcol" style="margin-bottom:0;">
<label class="required_field" for="evt_start_time">$lang{event_start_time}</label>
</div>
<div class="rightcol" style="margin-bottom:0;white-space:nowrap;">
<input id="evt_start_time" name="evt_start_time" style="width:7em;" value = "$event_start_time">
</div>
<div class="leftcol" style="margin-bottom:0;">
<label class="optional_field" for="evt_end_time">$lang{event_end_time}</label>
</div>
<div class="rightcol" style="margin-bottom:0;white-space:nowrap;">
<input id="evt_end_time" name="evt_end_time" style="width:7em;" value = "$event_end_time">
</div>
</div>
p1

  $return_text .=<<p1;
<div style="float:right;width:20%;">
<div class="icon_preview_box" style="float:left;">
<div id="icon_preview" style="text-align:center;">
<img src="$icons_url/$event_icon\l_32x32.gif" alt='event icon' border="0" vspace=0 hspace=0>
</div>
p1
  if ($options{unit_number_icons} == 1) {
    $return_text .=<<p1;
<div id="unit_number_preview" style="margin:3px;">
$unit_number_text
</div>
p1
  }
  $return_text .=<<p1;
</div>
</div>
p1


  $return_text .=<<p1;
<div class="leftcol" style="margin-bottom:0;">
<label class="optional_field" for="evt_icon">$lang{event_icon}</label>
</div>
<div class="rightcol" style="margin-bottom:0;white-space:nowrap;width:auto;">
<select name="evt_icon" id="evt_icon" onChange="update_preview_icon()">
p1
  @icon_menus_data = &assemble_icon_menus($event_icons_menu);
  $icon_menu_index_number = 0;
  $return_text .= &generate_flat_icon_menus(\@icon_menus_data, $event_icon);

  $return_text .=<<p1;
</select>
</div>
p1
  if ($options{unit_number_icons} == 1) {
    $return_text .=<<p1;
<div class="leftcol" style="margin-bottom:0;">
<label class="optional_field" for="unit_number">$lang{event_unit_number} </label>
</div>
<div class="rightcol" style="margin-bottom:0;white-space:nowrap;width:40%">
<input id="unit_number" name="unit_number" style="width:6ex;" value = "$event_unit_number" onKeyUp="update_preview_icon()">
</div>
p1
  }

  $return_text .=<<p1;
<div class="leftcol" style="">
<label class="optional_field" for="cal_details">$lang{event_background_color}</label>
</div>
<div class="rightcol" style="white-space:nowrap;width:40%;">
<input name="dummy" value="" size=1 style="display:none;">
<select name="evt_bgcolor" onchange="update_bg_color_select_box()" style="width:7em;">
p1
  my $custom_color = 1;

  foreach $temp (@event_bgcolors) {
    %possible_bgcolor = %{$temp};
    my $selected="";
    if ($possible_bgcolor{color} eq "$event_bgcolor")  { # default
      $custom_color = 0;
      $selected = " selected";
    }
    my $description = "";
    $description = $possible_bgcolor{title} if ($options{show_event_background_color_descriptions});

    $return_text .=<<p1;
<option value = "$possible_bgcolor{color}" $selected>$description
p1
  }

  my $color_select_icon_style="visibility:hidden;";
  if ($custom_color == 1 && $add_edit_event eq "edit") {
    $color_select_icon_style = "";
    $return_text .=<<p1;
<option id="custom_evt_color" value = "$event_bgcolor" selected>$lang{event_background_colorcustom}
p1
  } else {
    $return_text .=<<p1;
<option id="custom_evt_color" value = "#ffffff">$lang{event_background_colorcustom}
p1
  }


  $return_text .=<<p1;
</select>
<span id="color_select_icon0" class="color_select_icon" style="$color_select_icon_style vertical-align:top;background-image:url($graphics_url/color_select_icon.gif);" onClick="cs0.toggle_color_select();">&nbsp;&nbsp;&nbsp;&nbsp;</span>

</div>
<br style="clear:both;"/>
<br style="clear:both;"/>

</div>



<div id="tab_area1" class="info_box" style="width:100%;display:none;position:relative;z-index:101;padding-top:1em;text-align:left;">
p1

  if ($add_edit_event eq "edit") {
    if ($current_event{series_id} ne "") {
      $return_text .=<<p1;
<input type="hidden" name="recurring_event" value="1">
<input type="hidden" name="series_id" value="$current_event{series_id}">

<div style="text-align:center;">
$lang{recurring_event_edit1}
</div>

<div class="leftcol" style="margin-bottom:1em;">
<span class="small_note"><a href="javascript:display_help('recurring_event_change_all','$lang{recurring_event_change_all1}')">$lang{help_on_this}</a>&nbsp;&nbsp;</span>
</div>
<div class="rightcol" style="margin-bottom:1em;white-space:nowrap;">
<input type="checkbox" name="all_in_series" value="1" onClick="recur_edit_toggle()">
<label class="optional_field">$lang{recurring_event_change_all1}</label>
<div class="small_note style="margin-left:17px;"">$lang{recurring_event_change_all2}</div>
</div>
p1
    } else {
      $return_text .=<<p1;
$lang{recurrence_not_allowed}
p1
    }
    $return_text .=<<p1;
<br style="clear:both;"/>
p1

  } else {
    $return_text .=<<p1;
<div class="leftcol" style="margin-bottom:1em;">
<span class="small_note"><a href="javascript:display_help('recurring_event','$lang{recurring_event}')">$lang{help_on_this}</a>&nbsp;&nbsp;</span>
</div>
<div class="rightcol" style="margin-bottom:1em;white-space:nowrap;">
<input type="checkbox" name="recurring_event" value="1" onclick="javascript:recur_toggle();">
<label class="optional_field">$lang{recurring_event}</label>
</div>

<div class="leftcol" style="margin-bottom:1em;vertical-align:middle;">
<span class="fit_event">
<i>$lang{recurrence_type}</i><br/>
<span class="small_note"><a href="javascript:display_help('recurrence_type','$lang{recurrence_type}')">$lang{help_on_this}</a></span>
</span>
</div>
<div class="rightcol" style="margin-bottom:1em;white-space:nowrap;">
<input type="radio" name="recurrence_type" value="same_day_of_month" disabled checked onclick="recurrence_type_update()">
<span class="optional_field">$lang{same_day_of_month}</span>
<br/>
<input type="radio" name="recurrence_type" value="same_day_of_week" disabled onclick="recurrence_type_update()">
<span class="optional_field">
$lang{same_weekday}
</span>
<select name = "weekday_of_month_type" disabled>
<option value = "every_week">$lang{on_every_week}
<option value = "only_first_week">$lang{on_first_week}
<option value = "only_second_week">$lang{on_second_week}
<option value = "only_third_week">$lang{on_third_week}
<option value = "only_fourth_week">$lang{on_fourth_week}
<option value = "only_fifth_week">$lang{on_fifth_week}
<option value = "only_last_week">$lang{on_last_week}
</select> $lang{of_the_month}
<br/>

<span class="optional_field">
p1

    my $temp =<<p1;
<input name = "every_x_days" disabled/ value="1" style="width:2em;">
p1
    $lang{every_x_days} =~ s/###x###/$temp/;

    $return_text .=<<p1;
<input type="radio" name="recurrence_type" value="every_x_days" disabled onclick="recurrence_type_update()">
$lang{every_x_days}
</span>
<br/>

<span class="optional_field">
p1
    my $temp =<<p1;
<input name = "every_x_weeks" disabled/ value="1" style="width:2em;">
p1
    $lang{every_x_weeks} =~ s/###x###/$temp/;

    $return_text .=<<p1;
<input type="radio" name="recurrence_type" value="every_x_weeks" disabled onclick="recurrence_type_update()">
$lang{every_x_weeks}
</span>



</div>

<div class="leftcol" style="">
<span class="fit_event">
<i>$lang{fit_into_year}</i><br/>
<span class="small_note"><a href="javascript:display_help('fit_into_year','$lang{fit_into_year}')">$lang{help_on_this}</a></span>
</span>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input type="radio" name="year_fit_type" value="every_month" checked disabled onclick="document.add_event_form.custom_months.disabled=true">
<span class="optional_field">
$lang{every_momth}
</span>

<div style="float:left;">
<input type="radio" name="year_fit_type" value="custom_months" disabled onclick="document.add_event_form.custom_months.disabled=false">
<span class="optional_field">$lang{certain_months1} </span>
<br/>
<span class="small_note">$lang{certain_months2}</span>
</div>

<div style="float:left;">
<select multiple name = "custom_months" size=4 disabled>
p1

    for ($l1=0;$l1<scalar @months;$l1++) {
      $return_text .=<<p1;
<option value = $l1>$months[$l1]
p1
    }

    $return_text .=<<p1;
</select>
</div>

</div>

<div class="leftcol" style="">
<label class="required_field">$lang{recurring_event_ends}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input name="recur_end_date" size=12 value="$recur_end_date" disabled>
</div>

<br style="clear:both;"/>
p1
  }

  $return_text .=<<p1;
</div>

<div style="margin-top:1em;margin-bottom:1em;float:left;width:48%;text-align:center;font-weight:bold;">
<a href="javascript:preview_event()">$lang{preview_event1}</a>
<p class="small_note active_tab_text">
$lang{preview_event2}
</p>
</div>

<div style="margin-top:1em;margin-bottom:1em;float:left;width:48%;text-align:center;font-weight:bold;">
<a href="javascript:preview_dates()">$lang{preview_dates1}</a>
<p class="small_note active_tab_text">
$lang{preview_dates2}
</p>
</div>

<div class="info_box" style="clear:both;">
p1
  my $need_password = 1;
  $need_password = 0 if ($options{disable_passwords} eq "1");
  $need_password = 0 if ($logged_in_as_root || $logged_in_as_current_cal_admin || $logged_in_as_current_cal_user);

  if ($need_password == 1) {
    $return_text .=<<p1;
<div class="leftcol" style="">
<label class="required_field" for="cal_password">$lang{cal_password}</label>
</div>
<div class="rightcol" style="white-space:nowrap;">
<input type="password" id="cal_password" name="cal_password" style="width:30%;">
<span class="small_note" style="vertical-align:top;" ><a href="javascript:display_help('cal_password','$lang{cal_password}')">$lang{help_on_this}</a>&nbsp;&nbsp;</span>
</div>
p1
  } else {
      $return_text .=<<p1;
<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
$lang{no_password_needed}
</div>
p1
  }




  if ($add_edit_event eq "edit") {
    $return_text .=<<p1;
<div class="leftcol" style="">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<input name="add_event_button" type="submit" value = "$lang{update_event}">
<div class="small_note">$lang{add_event2_update}</div>
</div>


<div style="text-align:left;">
<input name="del_event_button" class="delete_button" type="submit" value = "$lang{delete_event1}">
<div class="small_note">$lang{delete_event2}</div>
</div>

p1
  } else {
    $return_text .=<<p1;
<div class="leftcol" style="">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<input name="add_event_button" type="submit" value = "$lang{add_event1}">
<br/>
<span id="preview_note" class="small_note">
$lang{add_event2}
</span>
</div>

<br style="clear:both;"/>
<br style="clear:both;"/>
p1
  }
  $return_text .=<<p1;
</div>
p1

}

sub add_edit_events {
  $event_details_template =~ s/###export event link###/$lang{event_details_export_disable}/g;
  $event_details_template =~ s/###edit event link###/$lang{event_details_edit_disable}/g;
  $event_details_template =~ s/###email reminder link###/$lang{event_email_reminder_disable}/g;

  my %results;

  my $recurring_event = $q->param('recurring_event');
  my $all_in_series = $q->param('all_in_series');

  # load (reload) all events (we have to write events beyond the default time window)
  if ($options{data_storage_mode} == 0) {
    unless ($loaded_all_events eq "1") {
      &load_events("all");
      &normalize_timezone();
    }
  }

  my $login_valid = 0;

  if ($options{disable_passwords} eq "1") {
    $login_valid = 1
  } elsif ($current_cal_id ne "") {
    #$debug_info .= "current_cal_id: $current_cal_id\n";
    if ($options{multi_calendar_event_mode} == 0 || $options{multi_calendar_event_mode} == 1)  { # only the event's calendar's user or the root user are allowed
      $login_valid = 1 if ($logged_in_as_root || $logged_in_as_current_cal_admin || $logged_in_as_current_cal_user);  # current calendar user
    } elsif ($options{multi_calendar_event_mode} == 2) { # any of the event's calendars' users or the root user are allowed
      if ($logged_in_as_root || $logged_in_as_current_cal_admin || $logged_in_as_current_cal_user)  { # current calendar user
        $login_valid = 1;
      } else {
        my $cal_password_valid = 0;
        foreach $cal_id (@evt_other_cal_ids) {
          my $temp = $cal_id;
          $cal_password_valid = 1 if ($profile->{calendar_permissions}->{$cal_id}->{admin} eq "1"); # shared calendar admin
          $cal_password_valid = 1 if ($profile->{calendar_permissions}->{$cal_id}->{user} ne "");  # shared calendar user
        }
        $login_valid = 1 if ($cal_password_valid == 1);
      }
    }
  }



  if ($q->param('del_event_button') ne "" || $api_command eq "delete_event") {
    $del_valid = 1;  #delete event.

    if ($login_valid == 0) {
      $del_valid = 0;
      push @{$results{messages}}, "[error]$lang{update_event_err1} '$current_calendar{title}'";
    }

    if (!defined $events{$current_event_id}) {
      $del_valid=0;
      push @{$results{messages}}, "[error]$lang{update_event_err2}";
    }

    if ($del_valid == 1) { #actually delete the event(s).
      if ($all_in_series ne "1") {
        my $subj = $lang{notify_subj};
        $subj =~ s/\$1/$script_url\/$name/;

        my $body = $lang{event_delete_notify};
        $body =~ s/\$1/$events{$current_event_id}{title}/;
        $body =~ s/\$2/$calendars{$current_cal_id}{title}/;

        foreach $email (@{$current_calendar{delete_emails}}) {
          #$debug_info .= "email notification sent to $email\n";
          &send_email($email, $options{reply_address}, $options{reply_address}, $subj, $body) if ($options{email_mode} > 0);
        }

        &delete_event($current_event_id);
        push @{$results{messages}}, "[status]$lang{update_event_delete_successful}";

      } else {
        # get the ids of the events in the series.
        my @events_in_series = &get_events_in_series($q->param('series_id'));
        &normalize_timezone();
        &delete_events(\@events_in_series);
        push @{$results{messages}}, "[status]$lang{update_event_delete_successful_recurring}";
      }
      $results{success} = 1;
    } else {
      $results{success} = 0;
    }
  } else  { # not a delete
    if (!$login_valid) {
      if ($options{anonymous_events}) {
        my $temp = $lang{update_event_err16};
        $temp =~ s/###calendar###/<b>$current_calendar{title}<\/b>/g;
        push @{$results{messages}}, ("[error]".$temp);
      } else {
        push @{$results{messages}}, "[error]".($lang{update_event_err1}."'".$current_calendar{title}."'");
      }
    }

    #check all input fields for validity
    my $event_valid = 1;
    my $event_id = $q->param('evt_id');        # only if editing.
    #my $event_cal_id = $current_cal_id;

    my @evt_other_cal_ids;
    @evt_other_cal_ids = $q->param('evt_other_cal_ids') if ($options{multi_calendar_event_mode} > 0);

    my $event_cal_password = $q->param('cal_password');
    my $event_title = $q->param('evt_title');
    my $event_icon = $q->param('evt_icon');
    my $event_details = $q->param('evt_details');
    my $event_unit_number = $q->param('unit_number');
    my $event_bgcolor = $q->param('evt_bgcolor');
    my $event_block_merge = $q->param('evt_block_merge');
    my $event_series_id = $q->param('series_id');

    my $event_duration = 0;
    my $event_start_timestamp = 0;
    my $event_end_timestamp = 0;

    $recur_end_date = $q->param('recur_end_date');
    my $all_day_event = $q->param('all_day_event');
    my $no_end_time = "";
    my $event_start_time = $q->param('evt_start_time');
    my $event_end_time = $q->param('evt_end_time');
    $event_start_date = $q->param('evt_start_date');
    my $event_days = $q->param('evt_days');

    my %recurrence_parms;
    $recurrence_parms{'recurrence_type'} = $q->param('recurrence_type');
    $recurrence_parms{'weekday_of_month_type'} = $q->param('weekday_of_month_type');
    $recurrence_parms{'every_x_days'} = $q->param('every_x_days');
    $recurrence_parms{'every_x_weeks'} = $q->param('every_x_weeks');
    $recurrence_parms{'year_fit_type'} = $q->param('year_fit_type');
    $recurrence_parms{'recur_end_date'} = $q->param('recur_end_date');
    my @custom_months = $q->param('custom_months');
    $recurrence_parms{'custom_months'} = \@custom_months;
    $recurrence_parms{'recur_end_timestamp'} = 0;

    my %input_parms;  # parms that are input by the user, but not stored as final event data
    $input_parms{'update_all_in_series'} = $q->param('all_in_series');
    $input_parms{'event_days'} = $event_days;
    $input_parms{'event_start_time'} = $event_start_time;
    $input_parms{'event_end_time'} = $event_end_time;
    $input_parms{'all_day'} = $all_day_event;

    # Check data for legitimacy.
    # some of these checks might be a bit redundant.
    if ($current_cal_id eq "") {
      $event_valid = 0;
      push @{$results{messages}}, "[error]".$lang{update_event_err3};
    }
    if ($event_title eq "") {
      $event_valid = 0;
      push @{$results{messages}}, "[error]".$lang{update_event_err4};
    }
    if ($event_icon eq "") {
      $event_valid = 0;
      push @{$results{messages}}, "[error]".$lang{update_event_err5};
    }

    $event_title =~ s/\r//g;                 # some browsers sneak these in
    $event_details =~ s/\r//g;               # some browsers sneak these in

    #strip html
    if ($event_title =~ m/<(.*)>/) {
      my $temp = $event_title;
      $temp =~ s/</&lt;/g;
      $temp =~ s/>/&gt;/g;
      push @{$results{messages}}, "[warning]".$lang{update_event_err7};
      $event_title =~ s/<(.*)>//g;
    }

    # strip out all non-numeric information from unit number
    my $unit_number = $event_unit_number;
    $unit_number =~ s/\D//g;

    #check event calendar name against existing calendars
    if (!defined == $calendars{$current_cal_id}) {
      $event_valid = 0;
      push @{$results{messages}}, "[error]".$lang{update_event_err8};
    }

    $event_valid = 0 if ($login_valid == 0 && !$options{anonymous_events});

    #push @{$results{messages}}, "[error]".$lang{update_event_err1}."'".$current_calendar{title}."'";

    # check dates
    if ($event_valid == 1) {
      my $verify_date_results = &verify_date($event_start_date);
      if ($verify_date_results ne "") {
        $event_valid = 0;
        my @sub_results = split("\n", $verify_date_results);
        foreach $sub_result (@sub_results) {
          push @{$results{messages}}, "[error]$lang{update_event_err9} $sub_result";
        }
        
        if ($event_days eq "") {
          push @{$results{messages}}, "[error]$lang{update_event_err9}$lang{date_verify_err2}";
        }
        
        if ($event_days =~ m/\D/ || $event_days <= 0) {
          my $temp = $lang{date_verify_err3};
          $temp =~ s/\$1/$event_days/;
          push @{$results{messages}}, "[error]$lang{update_event_err9}$temp";
        }
      }
    }

    # check recurring "repeat until" date
    if ($event_valid == 1) {
      if ($recurring_event ne "" && $add_edit_event eq "add") {
        my $verify_date_results = &verify_date($recurrence_parms{'recur_end_date'}, \%recurrence_parms);
        if ($verify_date_results ne "") {
          $event_valid = 0;
          my @sub_results = split("\n", $verify_date_results);
          foreach $sub_result (@sub_results) {
            push @{$results{messages}}, "[error]$lang{update_event_err10} $sub_result";
          }
        }
      }
    }

    # check time
    if ($event_valid == 1 && $all_day_event ne "1") {
      my $verify_time_results = &verify_time($event_start_time);
      if ($verify_time_results ne "") {
        $event_valid = 0;
        my @sub_results = split("\n", $verify_time_results);
        foreach $sub_result (@sub_results) {
          push @{$results{messages}}, "[error]$lang{update_event_err14} $sub_result";
        }
      }

      if ($event_end_time ne "") {
        my $verify_time_results = &verify_time($event_end_time);
        if ($verify_time_results ne "") {
          $event_valid = 0;
          my @sub_results = split("\n", $verify_time_results);
          foreach $sub_result (@sub_results) {
            push @{$results{messages}}, "[error]$lang{update_event_err15} $sub_result";
          }
        }
      }
    }

    if ($event_valid == 1) {
      my ($start_mon, $start_mday, $start_year) = &format2mdy($event_start_date, $current_calendar{date_format});
      $start_mon--;  # convert month to 0-11 format

      ($event_start_timestamp, $event_end_timestamp) = &timestamp_from_datetime($start_mday,$start_mon,$start_year,$event_days,$event_start_time,$event_end_time,$all_day_event);

      $event_end_timestamp +=1 if ($event_start_timestamp == $event_end_timestamp);  # give all events a duration of at least 1 second

      $event_duration = $event_end_timestamp - $event_start_timestamp;
      $no_end_time = 1 if ($event_duration == 1);

      $recurrence_parms{'duration'} = $event_duration if ($recurring_event ne "");

      if ($recurring_event ne "" && $add_edit_event eq "add") {
        my ($recur_end_mon, $recur_end_mday, $recur_end_year) = &format2mdy($recurrence_parms{'recur_end_date'}, $current_calendar{date_format});
        $recur_end_mon--;
        $recurrence_parms{'recur_end_timestamp'} = timegm(0,0,0,$recur_end_mday,$recur_end_mon,$recur_end_year);
      }

      # display warning if start timestamp is before present date
      if ($event_start_timestamp < $rightnow-86400) {
        push @{$results{messages}}, "[warning]$lang{update_event_err11}";
      }
    }

    # check for refreshes!
    if ($recurring_event eq "") {
      my %latest_event = $events{$latest_event_id};

      if ($latest_event{cal_ids}[0] eq $current_cal_id &&
          $latest_event{start} eq $event_start_timestamp &&
          $latest_event{end} eq $event_end_timestamp &&
          $latest_event{title} eq $event_title &&
          $latest_event{details} eq $event_details &&
          $latest_event{icon} eq $event_icon &&
          $latest_event{bgcolor} eq $event_bgcolor &&
          $latest_event{unit_number} eq $event_unit_number) {
        $event_valid = 0;
        push @{$results{messages}}, "[error]$lang{update_event_err12}";
      }
    } else { # recurring event refresh protection is a little trickier.
      # it's currently not implemented
    }

    if ($add_edit_event eq "edit") {
      #check to make sure the event id matches some event in the data structure. It always should, but we check anyway.
      if (!defined $events{$event_id}) {
        $event_valid = 0;
        push @{$results{messages}}, "[error]$lang{update_event_err13}";
      }
    }

    # properly format errors & warnings
    $message_results="";

    if ($event_valid == 1) {
      $results{successful} = 1;
      #$debug_info .= "(add_update_event) event_id: $event_id\n";
      unshift @evt_other_cal_ids, $current_cal_id;

      my %new_event = (recurring => $recurring_event,
                       cal_ids => \@evt_other_cal_ids,
                       start => $event_start_timestamp,
                       end => $event_end_timestamp,
                       all_day_event => $all_day_event,
                       days => &calculate_event_days($event_start_timestamp, $event_end_timestamp),
                       title => $event_title,
                       details => $event_details,
                       icon => $event_icon,
                       bgcolor => $event_bgcolor,
					   block_merge => $event_block_merge,
                       unit_number => $event_unit_number,
                       update_timestamp => $rightnow,
                       existing_id => $event_id,
                       recurrence_parms => \%recurrence_parms);

      if ($login_valid) {
        $results{text} .= &commit_event(\%new_event, \%input_parms);
      } elsif ($options{anonymous_events}) { # anonymous event -> update queue
        my $new_event_id = $max_action_id + int(rand(100));  # just in case several people decide to add something new at the same time.
        $new_event{id} = $new_event_id;
        #$debug_info .= "(add_edit_events) event cal id: $event_cal_id\n";
        # add event to %events data structure
        $new_events{$new_event_id} = \%new_event;

        # notify email(s)
        if ($options{email_mode} > 0) {
          my $subj = $lang{notify_subj};
          $subj =~ s/\$1/$script_url\/$name/;

          my $body = $lang{event_pending_notify};
          $body =~ s/\$1/$events{$current_event_id}{title}/;
          $body =~ s/\$2/$calendars{$current_cal_id}{title}/;
          $body =~ s/\$3/$script_url\/$name?view_pending_event=1&pending_event_id=$new_event_id/;

          foreach $add_email (@{$current_calendar{add_emails}}) {
            push @{$results{messages}}, "[status]email notification sent to $add_email";
            &send_email($add_email, $options{reply_address}, $options{reply_address}, $subj, $body);
          }
        }

        &add_action($new_event_id, "new_event");
        $event_box_text .= &generate_event_details(\%new_event);

        $results{text} .= <<p1;
<p style="font-weight:bold;">$lang{update_event_add_pending_successful}</p>
$event_box_text
<ul>
<li><a href="$script_url/$name?active_tab=1">$lang{update_event_add_successful_add_new}</a></li>
</ul>
p1
      }
    }
  }

  return \%results;

} #******************** end add_edit_event *****************************


sub commit_event() { # commit an add or update of an event
  my ($new_event_ref, $input_parms_ref) = @_;

  my $messages = "";
  my $new_event_id;

  my %new_event = %{$new_event_ref};
  my %input_parms = %{$input_parms_ref};

  unless ($loaded_all_events eq "1") {
    &load_events("all");
    &normalize_timezone();
  }
  
  if ($add_edit_event eq "add")  { # add a new event
    if ($new_event{'recurring'} eq "") {
      my $event_box_text = "";
      $new_event_id = ++$max_event_id;

      $events{$new_event_id} = deep_copy(\%new_event);
      $events{$new_event_id}{id} = $new_event_id;

      &add_event($new_event_id);
      $event_box_text .= &generate_event_details($events{$new_event_id});

      #temporarily offset event times by calendar gmtime diff

      $messages .= <<p1;
<p style="font-weight:bold;">$lang{update_event_add_successful}</p>
$event_box_text
<ul>
<li><a href="$script_url/$name?active_tab=1">$lang{update_event_add_successful_add_new}</a></li>
</ul>
p1
    } else { # recurring events loop
      #$debug_info .= "in commit_event recurring events loop!\n";
      my %recurrence_parms = %{$new_event{'recurrence_parms'}};

      my $new_series_id = ++$max_series_id;

      my $date_text = "";

      my @recurring_events_timestamps = @{&calculate_recurring_events($new_event{'start'}, \%recurrence_parms)};

      my @recurring_event_ids = ();
      foreach $recurring_event_start_timestamp (@recurring_events_timestamps) {
        my $new_event_id = ++$max_event_id;
        my $recurring_event_end_timestamp = $recurring_event_start_timestamp + $recurrence_parms{'duration'};

        $events{$new_event_id} = deep_copy(\%new_event);
        $events{$new_event_id}{id} = $new_event_id;
        $events{$new_event_id}{series_id} = $new_series_id;
        $events{$new_event_id}{start} = $recurring_event_start_timestamp;
        $events{$new_event_id}{end} = $recurring_event_end_timestamp;
        $events{$new_event_id}{recurrence_parms} = [];

        push @recurring_event_ids, $new_event_id;

        my $date_range = &nice_date_range_format($recurring_event_start_timestamp, $recurring_event_end_timestamp, "-");

        $date_text .= <<p1;
<li>$date_range</li>
p1
      }

      &add_events(\@recurring_event_ids);

      $event_box_text .= &generate_event_details($events{$max_event_id});

      $messages .= <<p1;
<p style="font-weight:bold;">$lang{update_event_add_successful_recurring}</p>
<ul>
$date_text
</ul>
$event_box_text
<ul>
<li><a href="$script_url/$name?active_tab=1">$lang{update_event_add_successful_add_new}</a></li>
<li><a href="$script_url/$name?active_tab=0">$lang{update_event_back_to_calendar}</a></li>
</ul>
p1
    }
    if ($options{email_mode} > 0) {
      my $subj = $lang{notify_subj};
      $subj =~ s/\$1/$script_url\/$name/;

      my $body = $lang{event_add_notify};
      $body =~ s/\$1/$new_event{title}/;
      $body =~ s/\$2/$calendars{$current_cal_id}{title}/;
      $body =~ s/\$3/$script_url\/$name?view_event=1&evt_id=$max_event_id/;

      foreach $add_email (@{$current_calendar{add_emails}}) {
        push @{$results{messages}}, "[status]email notification sent to $add_email";
        &send_email($add_email, $options{reply_address}, $options{reply_address}, $subj, $body);
      }
    }
  } elsif ($add_edit_event eq "edit") { #if we need to replace an existing record
    my $event_id = $new_event{'existing_id'};

    if ($new_event{'recurring'} eq "" || $input_parms{'update_all_in_series'} ne "1") {
      $events{$event_id} = deep_copy(\%new_event);
      $events{$event_id}{id} = $event_id;

      &update_event($event_id);

      $event_box_text .= &generate_event_details($events{$event_id});

      $messages .= <<p1;
<p style="font-weight:bold;">$lang{update_event_update_successful}</p>
p1
    } else  { # update recurring events
      # get the ids of the events in the series.
      my @events_in_series;
      foreach $event_id (keys %events) {
        my %event = %{$events{$event_id}};
        my $series_id = $event{series_id};
        if ($series_id eq $q->param('series_id')) {
          push @events_in_series, $event_id;
          my @temp = gmtime($event{end});

          ($recurring_event_start_timestamp, $recurring_event_end_timestamp) = &timestamp_from_datetime($temp[3],$temp[4],$temp[5]+1900,$input_parms{'event_days'},$input_parms{'event_start_time'},$input_parms{'event_end_time'},$input_parms{'all_day'});

          $events{$event_id} = deep_copy(\%new_event);
          $events{$event_id}{id} = $event_id;
          $events{$event_id}{series_id} = $series_id;
          $events{$event_id}{start} = $recurring_event_start_timestamp;
          $events{$event_id}{end} = $recurring_event_end_timestamp;
          $events{$event_id}{recurrence_parms} = [];
        }
      }
      &update_events(\@events_in_series);

      $messages .= <<p1;
<p style="font-weight:bold;">$lang{update_event_update_successful_recurring}</p>
p1
    }

    if ($options{email_mode} > 0) {
      my $subj = $lang{notify_subj};
      $subj =~ s/\$1/$script_url\/$name/;

      my $body = "";
      $body = $lang{event_update_notify};
      $body =~ s/\$1/$new_event{title}/;
      $body =~ s/\$2/$calendars{$current_cal_id}{title}/;
      $body =~ s/\$3/$script_url\/$name?view_event=1&evt_id=$event_id/;
        
      foreach $email (@{$current_calendar{update_emails}}) {
        $debug_info .= "email notification sent to $email\n";
        &send_email($email, $options{reply_address}, $options{reply_address}, $subj, $body);
      }
    }
  }

  return $messages;
}





sub common_javascript {
  my $logged_in_boolean = ($logged_in) ? "true":"false";
  my $date_format = lc $current_calendar{date_format};
  $return_string .=<<p1;
info_window_width = $info_window_width;
info_window_height = $info_window_height;

plans_url = '$script_url/$name';
theme_url = '$theme_url';
css_path = '$css_path';
date_format = '$date_format';
current_calendar_id = '$current_calendar{id}';
logged_in = $logged_in_boolean;

if (window.name == "")
  window.name="cal_mainwindow";

var main_window_name = window.name

plans_options['right_click_menus_enabled'] = $options{right_click_menus_enabled};
plans_options['disable_passwords'] = $options{disable_passwords};
plans_options['sessions'] = $options{sessions};
p1

  return $return_string;
}  #********************end common_javascript **********************


sub calendar_view_javascript {
  my ($events_start_timestamp, $events_end_timestamp) = @_;
  my $return_string="";

  # generate pre-formatted html for each event details pop-up on the
  # current calendar.  This routine is a good example of one of the choices
  # made in the design of this site--gaining client-side processor cycles
  # at the expense of bandwidth.  It would be possible to send the event details
  # in a javascript array or hash, and have the client's browser dynamically
  # genearate the appropriate html.  But it should be much faster to perform
  # this operation on the server and simply ship html to the client.  The idea is
  # to make the javascript processing as simple as possible, becuase javascript
  # is sloooow.  And even with all that extra html text, each page should still be
  # less than 100k (not counting images)

  #generate pre-formatted html for each event view
  $return_string .= &generate_event_details_javascript($events_start_timestamp, $events_end_timestamp);


  $return_string .=<<p1;

function custom_calendar() {

  var info_window_x = window_x()-400;
  var info_window_y = window_y();
p1

  $custom_form_text .=<<p1;
<div class="cal_title">
$lang{custom_calendar_title}
</div>

<form action="$script_url/$name" method="POST">
<input type="hidden" name="custom_calendar" value="1">

<label for="custom_calendar_calendar" class="required_field">
$lang{custom_calendar_choose_calendar}
</label>
<br/>
<select id="custom_calendar_calendar" name="custom_calendar_calendar">
p1

  foreach $cal_id (sort {$a <=> $b} keys %calendars) {
    $custom_form_text .=<<p1;
<option value = "$cal_id">$calendars{$cal_id}{title}
p1
  }

  $custom_form_text .=<<p1;
</select>
<br/><br/>
<label for="custom_calendar_background_calendars" class="optional_field">
$lang{custom_calendar_choose_bg_calendar}
</label>
<br/>

<select id="custom_calendar_background_calendars" name="custom_calendar_background_calendars" multiple size=6>
p1

  foreach $cal_id (sort {$a <=> $b} keys %calendars) {
    $custom_form_text .=<<p1;
<option value = "$cal_id">$calendars{$cal_id}{title}
p1
  }

  $custom_form_text .=<<p1;
</select>
<br/><br/>
p1

  if ($display_type == 1) {$list_selected = "selected";} else {$cal_selected = "selected";}

  $custom_form_text .=<<p1;
<label for="display_type" class="required_field">
$lang{custom_calendar_display_type}
</label>
<select name="display_type" onChange="blink('controls_submit_button', 3, 0);">
p1

    #foreach $possible_display_type (@{$options{display_types}})
    for (my $l1=0;$l1<scalar @{$options{display_types}};$l1++) {
      if ($options{display_types}[$l1] ne "1") {
next};
      my $selected="";

      if ($l1 eq $display_type) {
$selected = "selected";}

      $custom_form_text .=<<p1;
<option value="$l1" $selected>$lang{controls_display_type}[$l1]
p1
    }
    $custom_form_text .=<<p1;
</select>
<br/><br/>

<label for="cal_start_month" class="required_field">
$lang{custom_calendar_time_range}
</label>

<table class="layout" summary="">
<tr><td nowrap align=right>

$lang{controls_start_month}
</td><td nowrap>
<select id="cal_start_month" name="cal_start_month">
p1
  #list each month in the year
  $month_index=0;
  foreach $possible_month (@months) {
    if ($cal_start_month eq $month_index) {
      $custom_form_text .=<<p1;
<option value="$month_index" selected>$possible_month
p1
    } else {
      $custom_form_text .=<<p1;
<option value="$month_index">$possible_month
p1
    }
    $month_index++;
  }
  $custom_form_text .=<<p1;
</select>
<input name="cal_start_year" value = "$cal_start_year" size=4>
</td></tr>
<tr><td nowrap align=left colspan=2>

$lang{controls_num_months}
<input name="cal_num_months" value = "$cal_num_months" size=3>

</td></tr>
</table>
<br/><br/>

<input type=submit value = "$lang{custom_calendar_make_calendar}">
p1
  $custom_form_text =~ s/\//\\\//g;
  $custom_form_text =~ s/\n/\\n/g;
  $custom_form_text =~ s/"/\\"/g;

  $return_string .=<<p1;
  info_window = this.open("", "info_window", "resizable=yes,status=yes,scrollbars=yes,top="+info_window_y+",left="+info_window_x+",width=400,height=500");
  doc = info_window.document;
  doc.open('text/html');
  doc.write('<html>');
  doc.write('<title>$lang{custom_calendar_title}<\\/title>');
  doc.write('<base target=\\"'+main_window_name+'\\">');
  doc.write('<link rel=\\"stylesheet\\" href=\\"$css_path\\" type=\\"text/css\\" media=screen>');
  doc.write('<body>');
  doc.write("$custom_form_text");
  doc.write('<\\/body><\\/html>');
  doc.close();
  info_window.focus();
}

p1
  return $return_string;
}  #***********************end calendar_view_javascript************************"





sub add_edit_events_javascript {
  $return_string="";

  $return_string.=<<p1;
var info_window_x = window_x()-$info_window_width;
var info_window_y = window_y();

// color select stuff
var cs0;

function color_menu0_update(new_color) {
  //window.status = "updating! " + new_color;
  document.add_event_form.evt_bgcolor[document.add_event_form.evt_bgcolor.options.length-1].value = new_color;
  document.add_event_form.evt_bgcolor.style.background = new_color;
  document.add_event_form.evt_bgcolor.style.color = compatible_textcolor(new_color);
  document.add_event_form.evt_bgcolor[document.add_event_form.evt_bgcolor.options.length-1].style.color = compatible_textcolor(new_color);

  document.getElementById("custom_evt_color").style.background = new_color;
}

function do_on_load() {
  if (!document.add_event_form || !document.add_event_form.evt_bgcolor)
    return;

  // color select control
  cs0 = new color_select('cs0',document.add_event_form.evt_bgcolor[document.add_event_form.evt_bgcolor.selectedIndex].value);

  cs0.change_update_function = "color_menu0_update";   // NOTE-there are no ()
  cs0.hide_update_function = "color_menu0_update";   // NOTE-there are no ()
  cs0.attach_to_element(document.getElementById("color_select_icon0"));
  cs0.setrgb("$current_event{bgcolor}");
  cs0.update_color_box();

  for (i=0; i<document.add_event_form.evt_bgcolor.options.length; i++) {
    document.add_event_form.evt_bgcolor[i].style.background = document.add_event_form.evt_bgcolor[i].value;
    document.add_event_form.evt_bgcolor[i].style.color = compatible_textcolor(document.add_event_form.evt_bgcolor[i].value);
  }

  // for some reason, calling this immediately doesn't always work - even if it's called after the page is loaded.
  // so, a 200 ms delay.
  setTimeout('update_bg_color_select_box()', 200);

}


function update_bg_color_select_box() {
  var add_event_form = document.getElementById("add_event_form");

  // did the user just select custom?
  if (document.add_event_form.evt_bgcolor[document.add_event_form.evt_bgcolor.selectedIndex].text == "custom")
    document.getElementById("color_select_icon0").style.visibility = "visible";
  else
    document.getElementById("color_select_icon0").style.visibility = "hidden";

  // take focus off the select (in IE, making a selection highlights it in blue, so you cannot see the actual color you picked.  Removing focus makes this go away)
  document.add_event_form.dummy.style.display='inline';
  document.add_event_form.dummy.select();
  document.add_event_form.dummy.style.display='none';

  //if (!add_event_form.evt_bgcolor)
  // return;

  //alert(add_event_form.evt_bgcolor[add_event_form.evt_bgcolor.selectedIndex].value);

  add_event_form.evt_bgcolor.style.background = add_event_form.evt_bgcolor[add_event_form.evt_bgcolor.selectedIndex].value
  //document.add_event_form.evt_title.select();

  add_event_form.evt_bgcolor.style.color = compatible_textcolor(add_event_form.evt_bgcolor[add_event_form.evt_bgcolor.selectedIndex].value);

}

function update_preview_icon() {
  var icon_preview_area = document.getElementById("icon_preview")

  icon_name = document.add_event_form.evt_icon.options[document.add_event_form.evt_icon.selectedIndex].value
  icon_preview_area.innerHTML = "<img src=\\"$icons_url/" + icon_name + "_32x32.gif\\" border=\\"0\\" vspace=0 hspace=0>"

  if (!document.add_event_form.unit_number)
    return;

  var unit_number_preview_area = document.getElementById("unit_number_preview")

  // remove non-numeric text from the string
  var unit_number = document.add_event_form.unit_number.value;
  unit_number = unit_number.replace(/[^0-9]/g, "");

  // this next part might be really clever or really stupid (using a regex for something like this).
  // regardless, it's only one line, and that's nice.
  var unit_number_graphic_string = unit_number.replace(/([0-9])/g, "<img src=\\"$graphics_url/unit_number_patch_\$1_20x13.gif\\" border=\\"0\\" vspace=0 hspace=0>");
  unit_number_preview_area.innerHTML = unit_number_graphic_string;
  document.add_event_form.unit_number.value = unit_number;

  // it would be nice if we could do things with the DOM model, as opposed to innerHTML, but
  // that would be crazy cumbersome.  The following is a non-working stab at it.  Maybe useful someday.
  //preview_area.nodeValue = "unit num";
  //preview_area.appendChild(document.createTextNode("unit <img name=\\"event_icon\\" src=\\"$icons_url/eagle_medal_32x32.gif\\" border=\\"0\\" vspace=0 hspace=0>"));

}


function all_day_event_toggle(value) {
  var el0 = document.getElementById("all_day_event_toggle0");
  el0.style.display="";

  if (value)
    el0.style.display="none";
}


function preview_event() {
  info_window = this.open("", "info_window", "resizable=yes,status=yes,scrollbars=yes,width=300,height=200");
  doc = info_window.document;
  doc.open('text/html');
  doc.write('<html>');
  doc.write('<title>$lang{event_preview_title}<\\/title>');
  doc.write('<body bgcolor=\\"#ffffff\\" style=\\"font-family:arial,helvetica\\">');
  doc.write('<font size=5><font color=\\"0049df\\">$lang{generating_preview}<\\/font>');
  doc.write('<\\/body><\\/html>');
  doc.close();

  document.add_event_form.special_action.value = "preview_event";
  document.add_event_form.target = "info_window";
  document.add_event_form.submit();
  document.add_event_form.special_action.value = "";
  document.add_event_form.target = "";

  info_window.focus();
}


function recur_edit_toggle() {
  if (document.add_event_form.all_in_series.checked) {
    document.add_event_form.add_event_button.value="$lang{recurring_event_update_all1}";
    document.add_event_form.del_event_button.value="$lang{recurring_event_delete_all1}";
  } else {
    document.add_event_form.add_event_button.value="$lang{update_event}";
    document.add_event_form.del_event_button.value="$lang{delete_event1}";
  }
}


function preview_dates() {
  var i = 0;
  var j = 0;
  var info_window_x = window_x()-$info_window_width;
  var info_window_y = window_y();

  var evt_start_date = document.add_event_form.evt_start_date.value;
  var evt_days = document.add_event_form.evt_days.value;
  var evt_start_time = document.add_event_form.evt_start_time.value;
  var evt_end_time = document.add_event_form.evt_end_time.value;;
  var recurring_event = "";
  var every_x_days;
  var every_x_weeks;
  var recur_end_date;
  var recurrence_type = "";
  var year_fit_type = "";
  var weekday_of_month_type = "";
  var custom_months_string = "";

  if (document.add_event_form.recur_end_date) {
    every_x_days = document.add_event_form.every_x_days.value;
    every_x_weeks = document.add_event_form.every_x_weeks.value;
    recur_end_date = document.add_event_form.recur_end_date.value;

      if (document.add_event_form.recurring_event.checked)
        recurring_event = document.add_event_form.recurring_event.value;

    for (i=0; i<document.add_event_form.recurrence_type.length; i++)
      if (document.add_event_form.recurrence_type[i].checked)
        recurrence_type = document.add_event_form.recurrence_type[i].value;

    for (i=0; i<document.add_event_form.year_fit_type.length; i++)
      if (document.add_event_form.year_fit_type[i].checked)
        year_fit_type = document.add_event_form.year_fit_type[i].value;

    if (document.add_event_form.weekday_of_month_type.selectedIndex > -1)
      weekday_of_month_type = document.add_event_form.weekday_of_month_type.options[document.add_event_form.weekday_of_month_type.selectedIndex].value

    var selects = new Array();
    var custom_months = "";

    if (document.add_event_form.custom_months.selectedIndex > -1)
      for (j=0, i=document.add_event_form.custom_months.selectedIndex; i<document.add_event_form.custom_months.options.length;i++)
        if (document.add_event_form.custom_months.options[i].selected)
          custom_months_string +="&amp;custom_months="+document.add_event_form.custom_months.options[i].value;

  }

  var URL_string="$script_url/$name?special_action=preview_date&amp;evt_start_date="+evt_start_date+
                 "&amp;cal_id="+document.add_event_form.cal_id.value+
                 "&amp;recur_end_date="+recur_end_date+
                 "&amp;recurring_event="+recurring_event+
                 "&amp;recurrence_type="+recurrence_type+
                 "&amp;year_fit_type="+year_fit_type+
                 "&amp;every_x_days="+every_x_days+
                 "&amp;every_x_weeks="+every_x_weeks+
                 "&amp;evt_start_time="+evt_start_time+
                 "&amp;evt_start_time="+evt_start_time+
                 "&amp;weekday_of_month_type="+weekday_of_month_type+
                 custom_months_string+
                 "&amp;evt_days="+evt_days;

  info_window = this.open("", "info_window", "resizable=yes,status=yes,scrollbars=yes,top="+info_window_y+",left="+info_window_x+",width=$info_window_width,height=$info_window_height");
  doc = info_window.document;
  doc.open('text/html');
  doc.write('<html>');
  doc.write('<head>');
  doc.write('<title>$lang{event_preview_computing}<\\/title>');
  doc.write('<link rel=\\"stylesheet\\" href=\\"$css_path\\" type=\\"text/css\\" media=screen>');
  doc.write('<\\/head>');
  doc.write('<body style=\\"font-family:arial;\\">');
  doc.write('$lang{event_preview_computing}');
  doc.write('<\\/body><\\/html>');
  doc.close();

  info_window = this.open(URL_string, "info_window", "resizable=yes,status=yes,scrollbars=yes,top="+info_window_y+",left="+info_window_x+",width=$info_window_width,height=$info_window_height");
  info_window.focus();
}
p1


  my @help_text_map = ("evt_cal_id",
                       "evt_title",
                       "evt_details",
                       "help_evt_details",
                       "recurring_event",
                       "recurrence_type",
                       "fit_into_year",
                       "cal_password",
                       "recurring_event_change_all");

  my $help_text_javascript = "";
  foreach $key (@help_text_map) {
    my  $help_text=<<p1;
<div class="help_box">
$lang{'help_'.$key}
</div>
p1
    $help_text =~ s/\n/\\n/g;
    $help_text =~ s/"/\\"/g;
    $help_text =~ s/'/\\'/g;
    $help_text =~ s/\//\\\//g;


    $help_text_javascript .=<<p1;
    if (topic == "$key")
      help_text += "$help_text";
p1

  }

  $return_string .=<<p1;
  function display_help(topic, title) {
    help_text = "";
    $help_text_javascript
    if (help_text != "") {
      help_text = "<div class=\\"help_title\\">$lang{help_box_title} - "+title+"</div>" + help_text;
      show_help();
    }
  }
p1


  return $return_string
}  #********************end add_edit_events_javascript**********************




sub generate_users_javascript() {
  my ($cal_id) = @_;
  my $results = "";
  foreach $user_id (keys %users) {
    my $valid_for_current_calendar = 0;

    foreach $cal_id (keys %{$users{$user_id}{calendars}}) {
      if ($cal_id eq $current_cal_id) {
        $valid_for_current_calendar = 1;
        last;
      }
    }

    next if ($valid_for_current_calendar == 0);
    #next if ($user_id eq "");

    my %user = %{$users{$user_id}};
    $results .=<<p1;
users['$user_id'] = new User('$user_id','$user{name}');
p1
  }
  return $results;
}

sub generate_pending_events_javascript() {
  my $results = "";
  foreach $pending_event_id (sort {$new_events{$a}{update_timestamp} <=> $new_events{$b}{update_timestamp}} @pending_events_to_display) {
    my %pending_event = %{$new_events{$pending_event_id}};
    my $title = $pending_event{title};
    $title = &javascript_cleanup($title);

    $results .=<<p1;
pending_events['$pending_event_id'] = new Event({'id':'$pending_event_id', 'title':'$title', 'icon':'$pending_event{icon}', 'start':$pending_event{start}, 'end':$pending_event{end}, 'timestamp':$pending_event{update_timestamp}});
p1
  }
  return $results."\n";
}



sub add_edit_calendars_javascript {
  my $return_string = "";

  $return_string .= &generate_users_javascript($current_calendar{id});

  $return_string.=<<p1;
// override generic do_on_load method from plans.js
function do_on_load() {
  update_remote_calendar_requests();
  update_cal_color_select_box();
  list_users();

  if (document.getElementById("color_select_icon0")) {
    // color select controls
    cs0 = new color_select('cs0');
    cs0.change_update_function = "color_menu0_update";   // NOTE-there are no ()
    cs0.hide_update_function = "color_menu0_update";   // NOTE-there are no ()
    cs0.attach_to_element(document.getElementById("color_select_icon0"));
    cs0.setrgb("$current_event{bgcolor}");
    cs0.update_color_box();

    cs1 = new color_select('cs1');
    cs1.change_update_function = "color_menu1_update";   // NOTE-there are no ()
    cs1.hide_update_function = "color_menu1_update";   // NOTE-there are no ()
    cs1.attach_to_element(document.getElementById("color_select_icon1"));
    cs1.setrgb("$current_event{bgcolor}");
    cs1.update_color_box();
  }

}

function update_users() {
  if (!users || users.length == 0) return;
}



function set_merge_xml(merge_xml) {
  var results = merge_xml.match(/\\/remote_calendar>/g);
  //var num_merged_calendars = results.length;

  if (results)
    if (results.length > 1)
      document.getElementById("remote_background_calendars_status").innerHTML = results.length + " $lang{get_remote_calendar2_plural} $current_calendar{title}<br/>"; else
      document.getElementById("remote_background_calendars_status").innerHTML = results.length + " $lang{get_remote_calendar2_singular} $current_calendar{title}<br/>";
 else
    document.getElementById("remote_background_calendars_status").innerHTML = "$lang{get_remote_calendar3}";

  //for(var i =0; i < results.length; i++)
  //  document.getElementById("remote_background_calendars_status").innerHTML +="calendar "+i+"<br/>";


  document.update_cal_form.new_remote_calandars_xml.value = merge_xml;
  //alert (num_merged_calendars +" new calendars to merge!")
  //alert(merge_xml);
}

p1


  my $popup_javascript_info = "";
  if ($browser_type eq "IE") {
    $popup_javascript_info .=<<p1;
<script type="text/javascript" ><!--
function do_onresize() {
  opener.info_window_width = document.body.clientWidth;
  opener.info_window_height = document.body.clientHeight;
}
//-->
</script>
p1
  } else {
    $popup_javascript_info .=<<p1;
<script type="text/javascript" ><!--
function do_onresize() {
  opener.info_window_width = this.outerWidth;
  opener.info_window_height = this.outerHeight;
}
//-->
</script>
p1
  }

  $popup_javascript_info =~ s/\n/\\n/g;
  $popup_javascript_info =~ s/"/\\"/g;
  $popup_javascript_info =~ s/\//\\\//g;


  my $get_remote_calendars_html =<<p1;
<br/>
<form name="detect_remote_calendars" action="$script_url/$name" method="POST">
<input type="hidden" name="detect_remote_calendars" value="1"/>
$lang{get_remote_calendars_url}<br/>
<input name="remote_calendar_url" value="http://" style="width:90%;">
<br/>
<input type="submit" value="Go!" style="width:5em;">
</form>
p1
  $get_remote_calendars_html =~ s/\n/\\n/g;
  $get_remote_calendars_html =~ s/"/\\"/g;
  $get_remote_calendars_html =~ s/\//\\\//g;

  $return_string.=<<p1;
function get_remote_calendars() {
  info_window = this.open("", "info_window", "resizable=yes,status=yes,scrollbars=yes,top="+info_window_y+",left="+info_window_x+",width="+info_window_width+",height="+info_window_height);

  doc = info_window.document;
  doc.open('text/html');
  doc.write('<html>');
  doc.write('<title>$lang{get_remote_calendars}<\\/title>');
  doc.write('<link rel=\\"stylesheet\\" href=\\"$css_path\\" type=\\"text/css\\" media=screen>');
  doc.write('$popup_javascript_info');
  doc.write('<body onResize=\\"javascript:do_onresize()\\">');
  doc.write("<div class=\\"info_box\\" style=\\"padding:5px;\\"><br\\/>");
  doc.write('$get_remote_calendars_html');
  doc.write("<\\/div>");
  doc.write('<\\/body><\\/html>');
  doc.close();
  info_window.focus();
}



// color select stuff
var cs0 = new color_select();
cs0.setrgb("$current_calendar{background_events_color}");

var cs1 = new color_select();
cs1.setrgb("$current_calendar{calendar_events_color}");


function color_menu0_update(new_color) {
  if (document.update_cal_form.background_events_display_style2.checked) {
    document.update_cal_form.background_events_color.value = new_color;
    document.getElementById("bg_preview_e1").style.background = new_color;
    document.getElementById("bg_preview_e2").style.background = new_color;
  }
}

function color_menu1_update(new_color) {
  //if (new_color == "#000000") return;
  if (document.getElementById("color_select_icon1").style.visibility != "visible") return;

  document.update_cal_form.calendar_events_color[document.update_cal_form.calendar_events_color.options.length-1].value = new_color;
  document.update_cal_form.calendar_events_color.style.background = new_color;
  document.getElementById("custom_evt_color").style.background = new_color;
  document.getElementById("preview_e1").style.background = new_color;
  document.getElementById("preview_e2").style.background = new_color;
}


function update_cal_color_select_box() {
  if (!document.update_cal_form) return;
  if (!document.update_cal_form.calendar_events_color) return;

  var current_color = document.update_cal_form.calendar_events_color[document.update_cal_form.calendar_events_color.selectedIndex].value;

  if (current_color == "") {
    document.getElementById('preview_e1').style.background = '#ffffcc';
    document.getElementById('preview_e2').style.background = '#ccffcc';
    document.getElementById("color_select_icon1").style.visibility = "hidden";
    document.update_cal_form.calendar_events_color.style.background = "#ffffff";
    return;
  }

  if (document.update_cal_form.calendar_events_color.selectedIndex == document.update_cal_form.calendar_events_color.options.length-1) {
    document.getElementById("color_select_icon1").style.visibility = "visible";

    var current_custom_color = document.getElementById("custom_evt_color").value;
    document.getElementById("preview_e1").style.background = current_custom_color;
    document.getElementById("preview_e2").style.background = current_custom_color;
    document.update_cal_form.calendar_events_color.style.background = current_custom_color;
    return;
  } else {
    cs1.setrgb(current_color);

    document.getElementById("color_select_icon1").style.visibility = "hidden";
    document.getElementById("preview_e1").style.background = current_color;
    document.getElementById("preview_e2").style.background = current_color;
    document.update_cal_form.calendar_events_color.style.background = current_color;

    // take focus off the select (in IE, making a selection highlights it in blue, so you cannot see the actual color you picked.  Removing focus makes this go away)
    document.update_cal_form.dummy.style.display='inline';
    document.update_cal_form.dummy.select();
    document.update_cal_form.dummy.style.display='none';
  }

  //document.add_event_form.evt_bgcolor.style.background = document.add_event_form.evt_bgcolor[document.add_event_form.evt_bgcolor.selectedIndex].value


  //document.update_cal_form.evt_title.select();
}

// end color_select stuff
p1

  $return_string.=<<p1;
  var info_window_x = window_x()-$info_window_width;
  var info_window_y = window_y() + 200;

function show_help() {
  info_window = this.open("", "info_window", "resizable=yes,status=yes,scrollbars=yes,top="+info_window_y+",left="+info_window_x+",width="+info_window_width+",height="+info_window_height);

  doc = info_window.document;
  doc.open('text/html');
  doc.write('<html>');
  doc.write('<title>$lang{help_box_title}<\\/title>');
  doc.write('<link rel=\\"stylesheet\\" href=\\"$css_path\\" type=\\"text/css\\" media=screen>');
  doc.write('$popup_javascript_info');

  doc.write('<body onResize=\\"javascript:do_onresize()\\">');
  doc.write(help_text);
  doc.write('<\\/body><\\/html>');
  doc.close();
  info_window.focus();
}

function preview_cal() {
  var cal_title = document.update_cal_form.cal_title.value
  var cal_link = document.update_cal_form.cal_link.value
  var cal_details = document.update_cal_form.cal_details.value;

  if (cal_title == "") {
    evt_label = "<span style=\\"color:#ff0000\\">$lang{preview_calendar_temp_title}<\\/span>";
    add_disable = true;
  }

  //
  if (document.getElementById("preview_warning")) {
    document.getElementById("preview_warning").innerHTML="";
  }

  info_window = this.open("", "info_window", "resizable=yes,status=yes,scrollbars=yes,top="+info_window_y+",left="+info_window_x+",width="+info_window_width+",height="+info_window_height);

  doc = info_window.document;
  doc.open('text/html');
  doc.write('<html>');
  doc.write('<title>$lang{preview_calendar_title}<\\/title>');
  doc.write('<link rel=\\"stylesheet\\" href=\\"$css_path\\" type=\\"text/css\\" media=screen>');
  doc.write('$popup_javascript_info');

  doc.write('<body onResize=\\"javascript:do_onresize()\\">');
  doc.write("<div class=\\"info_box\\" style=\\"padding:5px;\\"><br/><div style=\\"white-space:nowrap;\\"><span class=\\"cal_title\\">");
  doc.write("<a target=\\"_blank\\" href=\\""+cal_link+"\\">"+cal_title+"<\\/a><\\/span><\\/div><br/><div>"+cal_details+"<\\/div><\\/div>");
  doc.write('<\\/body><\\/html>');
  doc.close();
  info_window.focus();
}
p1

  my @help_text_map = ("title",
                       "link",
                       "details",
                       "password",
                       "new_password",
                       "current_password",
                       "change_password",
                       "selectable_calendars",
                       "background_calendars",
                       "remote_background_calendars",
                       "background_events_display_style",
                       "events_display_style",
                       "list_background_calendars_together",
                       "default_number_of_months",
                       "max_months",
                       "gmtime_diff",
                       "date_format",
                       "week_start_day",
                       "new_calendars_automatically_selectable",
                       "allow_remote_calendar_requests",
                       "remote_calendar_requests_password",
                       "event_change_email",
                       "popup_window_size",
                       "custom_stylesheet",
                       "custom_template",
                       "add_user",
                       "add_new_ical");

  my $help_text_javascript = "";
  foreach $key (@help_text_map) {
    my  $help_text=<<p1;
<div class="help_box">
$lang{'help_cal_'.$key}
</div>
p1
    $help_text =~ s/\n/\\n/g;
    $help_text =~ s/"/\\"/g;
    $help_text =~ s/'/\\'/g;
    $help_text =~ s/\//\\\//g;
    $help_text =~ s/###css file###/$css_path/g;

    $help_text_javascript .=<<p1;
    if (topic == "$key")
      help_text += "$help_text";
p1
  }

  $return_string .=<<p1;
function display_help(topic, title) {
  help_text = "";
  $help_text_javascript
  if (help_text != "") {
    help_text = "<div class=\\"help_title\\">$lang{help_box_title} - "+title+"</div>" + help_text;
    show_help();
  }
}
p1


  return $return_string
}  #********************end add_edit_calendars_javascript**********************


sub generate_cal_details()
{
  my ($calendar_ref) = @_;

  my %calendar = %{$calendar_ref};

  my $results = <<p1;
<div class="cal_title">
$calendar{title}
</div>

<div>
$calendar{details}
</div>
p1

$writable{calendar_file}  and $return_text .= <<p1;
<div style="white-space:nowrap;">
<span class="small_note">
<a href="$script_url/$name?active_tab=2&amp;add_edit_cal_action=edit&amp;cal_id=$calendar{id}">$lang{calendar_add_edit}</a>
</span>
</div>
p1

  $return_text .= <<p1;
<div style="white-space:nowrap;margin-top:2em;">
<span class="small_note">
$lang{calendar_direct_link}<br/>
<a href="$script_url/$name?cal_id=$calendar{id}">$script_url/$name?cal_id=$calendar{id}</a>
</span>
</div>
p1

  return $results;
}



sub render_calendar {
  my $return_text = "";
  my $week_events = {};
  my $week_slots = {};
  my $debug = 0;
  my @debug_events = ("105");
  
  my $show_month_breaks = ($cal_num_months > 1 && $options{continuous_multimonth} ne '1' ? 1 : 0);

  my $cal_month_idx = 0;
  my $last_cal_month;
  my $is_first_cal_date = 1;
  my @use_other_month = (0, 1);

  my ($cal_start_month, $cal_start_year, $cal_end_month, $cal_end_year, $selected_events) = @_;
  #initialize loop variables
  my $cal_start_timestamp = timegm(0,0,0,1,$cal_start_month,$cal_start_year);
  my $cal_end_timestamp = find_end_of_month($cal_end_month, $cal_end_year);

  my $current_month = $cal_start_month;
  my $current_year = $cal_start_year;

  while ($current_year < $cal_end_year || ($current_year == $cal_end_year && $current_month <= $cal_end_month)) {
    $last_cal_month = ($current_year * 100 + $current_month) == ($cal_end_year * 100 + $cal_end_month);

    foreach $key (keys %week_events) {delete $week_events{$key};}
    foreach $key (keys %week_slots) {delete $week_slots{$key};}

    #for calendars with multiple months, display the name of each month above the calendar
    if ($show_month_breaks) {
      $return_text .=<<p1;
<p class="cal_month_title" style="padding:5px;">
$months[$current_month] $current_year
</p>
p1
    }
    #calculate where to start the calendar (first sunday)
    #first, calculate what day of the week this month begins on

    #format for timegm: timegm($sec,$min,$hour,$mday,$mon,$year);

    my $cal_month_start_date = timegm(0,0,0,1, $current_month, $current_year);
    my @cal_month_start_date_array = gmtime $cal_month_start_date;

    my $cal_start_day_offset = $cal_month_start_date_array[6] - $current_calendar{week_start_day};
    $cal_start_day_offset += 7 if ($cal_start_day_offset < 0);

    my $cal_start_date = $cal_month_start_date - (86400 * $cal_start_day_offset);

    # in continuous_multimonth mode, skip first week if we already drew it in the previous iteration
    $cal_start_date = $cal_start_date + 604800 if (!$show_month_breaks && $cal_month_idx > 0 && $cal_start_day_offset != 0);
    
    # start with other_month if the first month does not start on the first day of the week (i.e there is an offset)
    @use_other_month = (1, 0) if (!$show_month_breaks && $cal_month_idx == 0 && $cal_start_day_offset != 0 && $current_month % 2);

    my @cal_start_date_array = gmtime $cal_start_date;

    my $cal_end_date = $cal_start_date + 86400*37;

    my $next_month = $current_month+1;
    if ($next_month == 12) {$next_month=0;}

    #cal_date keeps track of the date (in timestamp format)
    #as the calendar loop iterates through each day on the calendar page
    my $cal_date = $cal_start_date;
    my @cal_date_array = gmtime $cal_date;

    my %max_day_events;
    my %week_max_slots;

    #make a first pass through the month, assemble event week events structure:
    #week_events{week_index}{id} ={}
    #this hash has 4 keys--start_weekday, start_day, length and slot_order (slot_order will be calculated in the second pass)
    for ($l1=0;$cal_date_array[4] != $next_month;$l1++)  { #each calendar has 5 or 6 weeks
      $week_start_timestamp = $cal_date;
      $week_end_timestamp = $week_start_timestamp + 604800;
      $max_day_events{$l1} = 0;

      @cal_date_array = gmtime $cal_date;
      foreach $event_id (keys %events) {
        $debug = 1 if ($debug == 1 && (&contains(\@debug_events, $event_id) || $debug_events[0] eq "all"));

        my %event = %{$events{$event_id}};

        #$debug_info .= "checking event $event_id ($event{start}, $event{end})\n";
        #$debug_info .= "checking event $event_id ($event{start} - $event{end}) against week $l1 ($week_start_timestamp - $week_end_timestamp)\n";
        $debug_info .= "week $l1 checking event $event_id ($event{start}-$event{end}}) for overlap ($week_start_timestamp-$week_end_timestamp)\n" if ($debug && &contains(\@debug_events, $event_id));

        if (&time_overlap($event{start}, $event{end}, $week_start_timestamp, $week_end_timestamp)) {
          $debug_info .= "week $l1 event $event_id overlaps\n" if ($debug);

          #$debug_info .= "event $event_id ($event{days} days) in week $l1\n";
          #$debug_info .= "check passed!\n";

          my @event_date_array = gmtime $event{start};
          my @event_end_date_array = gmtime $event{end};
          my $event_start_weekday = $event_date_array[6] - $current_calendar{week_start_day};
          my $event_end_weekday = $event_end_date_array[6] - $current_calendar{week_start_day};

          $event_start_weekday +=7 if ($event_start_weekday < 0);
          $event_end_weekday +=7 if ($event_end_weekday < 0);

          #$event_start_weekday = 0 if ($event_start_weekday < 0);
          #$event_end_weekday = 0 if ($event_end_weekday < 0);
          #$event_start_weekday = 6 if ($event_start_weekday > 6);
          #$event_end_weekday = 6 if ($event_end_weekday > 6);

          my $days_before_week_start = 0;
          my $days_after_week_end = 0;

          $debug_info .= "week $l1 event $event_id event_date_array[6]: $event_date_array[6]\n" if ($debug);
          $debug_info .= "week $l1 event $event_id event_end_date_array[6]: $event_end_date_array[6]\n" if ($debug);
          $debug_info .= "week $l1 event $event_id current_calendar{week_start_day}: $current_calendar{week_start_day}\n" if ($debug);
          $debug_info .= "week $l1 event $event_id event_start_weekday: $event_start_weekday event_end_weekday: $event_end_weekday\n" if ($debug);

          # the event might fall completely within the week boundary, or it
          # might overlap event begins or ends outside the week boundaries
          # (there are four possible cases):
          if ($event{start} < $week_start_timestamp && $event{end} > $week_end_timestamp) { # the event both starts and ends outside this week
            $debug_info .= "case 0\n" if ($debug);
            $week_events{$l1}{$event{id}}{start_weekday} = 0;
            $week_events{$l1}{$event{id}}{length} = 7;
          } elsif ($event{start} < $week_start_timestamp) {  # the event starts before this week and ends within it
            $debug_info .= "case 1\n" if ($debug);
            #$days_before_week_start = int(($week_start_timestamp - $event{start})/86400);
            $week_events{$l1}{$event{id}}{start_weekday} = 0;
            #$week_events{$l1}{$event{id}}{length} = $event{days} - $days_before_week_start;
            $week_events{$l1}{$event{id}}{length} = $event_end_weekday+1;
            $debug_info .= "week $l1 event $event_id week_start_timestamp: $week_start_timestamp start: $event{start} start_wkday: $week_events{$l1}{$event{id}}{start_weekday} length: $week_events{$l1}{$event{id}}{length}\n" if ($debug);
          } elsif ($event{end} > $week_end_timestamp) { # the event starts within this week and ends after it
            $debug_info .= "case 2\n" if ($debug);
            $week_events{$l1}{$event{id}}{start_weekday} = $event_start_weekday;
            $week_events{$l1}{$event{id}}{length} = 7-$event_start_weekday;
            if ($debug == 1) {
             foreach $debug_event_id (@debug_events) {
                next if ($debug_event_id ne $event{id});
                $debug_info .= "event $debug_event_id days: $events{$debug_event_id}{days} event_start_weekday: $event_start_weekday event_end_weekday: $event_end_weekday  length: $week_events{$l1}{$debug_event_id}{length}\n";
             }
            }
          } else { #the event begins and ends within the week
            $debug_info .= "case 3\n" if ($debug);
            $week_events{$l1}{$event{id}}{length} = $event{days};
            $week_events{$l1}{$event{id}}{start_weekday} = $event_start_weekday;
          }

          if ($week_events{$l1}{$event{id}}{start_weekday} < 0) {
            $week_events{$l1}{$event{id}}{start_weekday} += 7;
          } elsif ($week_events{$l1}{$event{id}}{start_weekday} > 6) {
            $week_events{$l1}{$event{id}}{start_weekday} -= 7;
          }
          $week_events{$l1}{$event{id}}{length} = 7 if ($week_events{$l1}{$event{id}}{length} > 7);

          $debug_info .= "week $l1 event $event_id event_start_weekday: $week_events{$l1}{$event{id}}{start_weekday} length: $week_events{$l1}{$event{id}}{length}\n\n" if ($debug);
        }
      }

      $temp_debug_info = "";
      $cal_date += 604800;

      # each day has at least two slots (the date, and a blank box beneath it)
      for ($l2=0;$l2<7;$l2++) {
        $week_slots{$l1}{$l2}{0}{width}=1;
        $week_slots{$l1}{$l2}{0}{depth}=1;
        $week_slots{$l1}{$l2}{1}{width}=1;
        $week_slots{$l1}{$l2}{1}{depth}=1;
      }

      if ($debug == 1) {
        foreach $debug_event_id (@debug_events) {
          $debug_info .= "event $debug_event_id length: $week_events{$l1}{$debug_event_id}{length} start: $events{$debug_event_id}{start}\n";
        }
      }

      #order the week_events
      #fill in the %slots data structure:
      # $week_slots{week_index}{day_index}{slot_index}
      #   $width      = colspan
      #   $depth      = rowspan
      #   $spacer     = 1 if spacer slot.
      #   @ids        = event ids


      my $max_week_needed_slots = 0;
      my %max_day_needed_slots;

      # hey man, that's a sharp-lookin' sort you got there
      foreach $week_event_id (sort {
                                    return $week_events{$l1}{$b}{length} <=> $week_events{$l1}{$a}{length}
                                      if ($week_events{$l1}{$b}{length} != $week_events{$l1}{$a}{length});

                                      return $events{$a}{title} cmp $events{$b}{title}
                                        if ($events{$b}{all_day_event} ne "" && $events{$a}{all_day_event} ne "");

                                      return $events{$b}{all_day_event} cmp $events{$a}{all_day_event}
                                        if ($events{$b}{all_day_event} ne "" || $events{$a}{all_day_event} ne "");

                                      return $events{$a}{start} <=> $events{$b}{start};
                                    }
                                   keys %{$week_events{$l1}})
      {
        #$debug = 0;
        #$debug = 1 if (&contains(\@debug_events, $week_event_id));

        #$debug_info .= "week $l1 week_event $week_event_id length: $week_events{$l1}{$week_event_id}{length} start: $events{$week_event_id}{start}\n" if ($debug);

        $empty_slot = 0;

        #starting at 1 leaves a row of empty slots (row 0), where the calendar dates will go.
        for ($l4=1; $empty_slot != 1; $l4++) {
          $empty_slot = 1;
          #check each day of the week_event, to make sure the slot is empty
          for ($l2=0; $l2<$week_events{$l1}{$week_event_id}{length}; $l2++) {
            $day_index=$l2+$week_events{$l1}{$week_event_id}{start_weekday};

            if (scalar @{$week_slots{$l1}{$day_index}{$l4}{ids}} > 0) {
              $empty_slot = 0;
            }
          }
          $slot_index=$l4;
        }

        #$debug_info .= "event $week_event_id start_wkday $week_events{$l1}{$week_event_id}{start_weekday} slot $slot_index length $week_events{$l1}{$week_event_id}{length}\n" if ($debug);

        #fill up $week_slots with the new event (extend horizontally)
        for ($l2=0; $l2<$week_events{$l1}{$week_event_id}{length}; $l2++) {
          #$slots_in_row{$l1}{$slot_index}++;

          $day_index = $l2+$week_events{$l1}{$week_event_id}{start_weekday};
          push @{$week_slots{$l1}{$day_index}{$slot_index}{ids}}, $week_event_id;

          if ($l2==0)  { # first slot gets the width
$week_slots{$l1}{$day_index}{$slot_index}{width} = $week_events{$l1}{$week_event_id}{length};} else         { # other slots get 0 for length (they get absorbed later)
$week_slots{$l1}{$day_index}{$slot_index}{width} = 0;}
          $week_slots{$l1}{$day_index}{$slot_index}{depth} = 1;
        }

        #keep track of the maximum number of slots each week has
        if ($slot_index > $week_max_slots{$l1}) {
          $week_max_slots{$l1} = $slot_index;
          $max_day_events{$l1} = $slot_index;
        }
      }

      # give all blank slots width and depth of 1
      for ($l2=0;$l2<7;$l2++) {
        for ($l3=1;$l3<$week_max_slots{$l1}+1;$l3++)   { # for each slot
          if ($week_slots{$l1}{$l2}{$l3}{depth} eq "" || $week_slots{$l1}{$l2}{$l3}{width} eq "") {
            $week_slots{$l1}{$l2}{$l3}{width}=1;
            $week_slots{$l1}{$l2}{$l3}{depth}=1;
          }
        }
      }

      my $total_spacers=0;
      # insert spacer slots below multi-day events.
      for ($l3=1;$l3<$week_max_slots{$l1}+1;$l3++)   { # for each slot
        my $inserted_spacers=0;
        for ($l2=0;$l2<7;$l2++) {
          if ($week_slots{$l1}{$l2}{$l3}{width} > 1)  { #multi-day event, add spacers beneath
            # create spacer row
            if ($inserted_spacers == 0) {
              # move everything else down and increment the number of rows
              $week_max_slots{$l1}++;
              for ($l4=0;$l4<7;$l4++)   { # insert blank slots
                for ($l5=$week_max_slots{$l1};$l5>$l3+1;$l5--)   { # count backwards
                  $week_slots{$l1}{$l4}{$l5} = &deep_copy($week_slots{$l1}{$l4}{$l5-1});
                }
                $week_slots{$l1}{$l4}{$l3+1}{width} = 1;
                $week_slots{$l1}{$l4}{$l3+1}{depth} = 1;
                $week_slots{$l1}{$l4}{$l3+1}{spacer} = 0;
                $week_slots{$l1}{$l4}{$l3+1}{ids} = "";
              }
              $inserted_spacers=1
            }

            # insert spacers into previously created row.
            for ($l4=$l2;$l4<$l2+$week_slots{$l1}{$l2}{$l3}{width};$l4++) {
              $week_slots{$l1}{$l4}{$l3+1}{spacer}=1;
              #$debug_info .= "inserted spacer into row: ".($l3+1).", column $l4, event ".($week_slots{$l1}{$l4}{$l3}{ids}[0])."\n";
              $total_spacers++;
            }
            #$debug_info .= "week $l1 day 0, slot 3: ".$week_slots{$l1}{0}{3}{ids}[0]."\n";

          }
        }
      }

      #if ($l1 == 3) {
        #$debug_info .= "$total_spacers spacers inserted for week $l1.\n";
        #$debug_info .= "week $l1 day 0, slot 3: ".$week_slots{$l1}{0}{3}{ids}[0]."\n";
      #}

      #$debug_info .= "week $l1, event slots in row 1:  $slots_in_row{$l1}{1}\n";

      # calculate slots in each row:
      for ($l3=1;$l3<$week_max_slots{$l1};$l3++)   { # for each slot
        if ((scalar @{$week_slots{$l1}{$l2}{$l3}{ids}}) > 0 ) {
          $slots_in_row{$l1}{$l3} += $week_slots{$l1}{$l2}{$l3}{width};
          #$debug_info .= "event in row $l1.  Incrementing slots_in_row {$l1} {$l3} to $slots_in_row{$l1}{$l3}\n";
        }
        if ($week_slots{$l1}{$l2}{$l3}{spacer} == 1) {
          $slots_in_row{$l1}{$l3}++;
          #$debug_info .= "spacer in row $l1.  Incrementing slots_in_row {$l1} {$l3} to $slots_in_row{$l1}{$l3}\n";
        }
      }

      %max_day_needed_slots = (0=>$week_max_slots{$l1},1=>$week_max_slots{$l1},2=>$week_max_slots{$l1},3=>$week_max_slots{$l1},4=>$week_max_slots{$l1},5=>$week_max_slots{$l1},6=>$week_max_slots{$l1});


      #$slots_in_row{$l1}{$slot_index}++;

      # extend event slots vertically.
      for ($l2=0;$l2<7;$l2++)   { # for each day of the week
        for ($l3=1;$l3<$week_max_slots{$l1};$l3++)   { # for each slot
          if (scalar @{$week_slots{$l1}{$l2}{$l3}{ids}} > 0 && $week_slots{$l1}{$l2}{$l3}{width} > 0) { # if this slot begins an event
            my $start_slot = $l3+1;
            for ($l4=$start_slot; $l4<$week_max_slots{$l1}+1; $l4++) {
              #$debug_info .= "checking slot $l4 below event slot ($l2, $l3)\n";
              #if ($week_slots{$l1}{$l2}{$l4}{width} == 0)
              #  {next;}

              if (scalar @{$week_slots{$l1}{$l2}{$l4}{ids}} > 0 && $week_slots{$l1}{$l2}{$l4}{width} eq $week_slots{$l1}{$l2}{$l3}{width}) { # another event below this one, with the same width.
                if ($l1 eq "3" && $debug) {
                $debug_info .= "week $l1 slot ($l2, $l3) extended vertically because of another event below with the same width.\n";}
                #$debug_info .= "week $l1 slot ($l2, $l3) extended vertically because of another event below with the same width.\n";
                #$debug_info .= "same-width event slot below week $l1, slot ($l2, $l3)\n";
                $week_slots{$l1}{$l2}{$l4}{width}=0;
                $week_slots{$l1}{$l2}{$l4}{depth}=0;
                $week_slots{$l1}{$l2}{$l3}{depth}++;
                push @{$week_slots{$l1}{$l2}{$l3}{ids}}, @{$week_slots{$l1}{$l2}{$l4}{ids}};

                $max_day_needed_slots{$l2}--;
                #$slots_in_row{$l1}{$l4}--;

              } elsif ($week_slots{$l1}{$l2}{$l3}{width} == 1 && (scalar @{$week_slots{$l1}{$l2}{$l4}{ids}}) == 0 && $week_slots{$l1}{$l2}{$l4}{spacer} == 0) { # blank slot below 1-slot wide event slot
                if ($l1 eq "3" && $debug) {
                $debug_info .= "week $l1 slot ($l2, $l3) extended vertically because of a blank slot below.\n";}
                #$debug_info .= "week $l1 slot ($l2, $l3) extended vertically because of a blank slot below.\n";
                #$debug_info .= "week $l1 slot ($l2, $l4) # ids:".scalar @{$week_slots{$l1}{$l2}{$l4}{ids}}."\n";
                #$debug_info .= "blank slot below week $l1, slot ($l2, $l3)\n";
                $week_slots{$l1}{$l2}{$l4}{width}=0;
                $week_slots{$l1}{$l2}{$l4}{depth}=0;
                $week_slots{$l1}{$l2}{$l3}{depth}++;
                $max_day_needed_slots{$l2}--;
                #$debug_info .= "week $l1, slot ($l2, $l3) depth: $week_slots{$l1}{$l2}{$l3}{depth} \n";
              } else {
                $debug_info .= "week $l1 slot ($l2, $l4) occupied.  Finished attempting to extend slot $l3\n" if ($debug);
                last;
              }
            }
          }
        }
      }
      #$debug_info .= "week $l1, event slots in row 1:  $slots_in_row{$l1}{1}\n";

      # extend blank slots vertically into other blank slots.
      for ($l2=0;$l2<7;$l2++)   { # for each day of the week

        for ($l3=1;$l3<$week_max_slots{$l1};$l3++)   { # for each slot

          next if (scalar @{$week_slots{$l1}{$l2}{$l3}{ids}} > 0);

          if ($week_slots{$l1}{$l2}{$l3}{width} > 0 && $week_slots{$l1}{$l2}{$l3}{spacer} == 0)  { # if it's blank (but not a spacer)

            my $start_slot = $l3+1;
            for ($l4=$start_slot; $l4<$week_max_slots{$l1}+1; $l4++) {
              if ($week_slots{$l1}{$l2}{$l4}{width} == 1 && $week_slots{$l1}{$l2}{$l4}{spacer} == 0) {
                #$debug_info .= "blank slot below week $l1, slot ($l2, $l3)\n" if ($debug);
                $week_slots{$l1}{$l2}{$l4}{width}=0;
                $week_slots{$l1}{$l2}{$l4}{depth}=0;
                $week_slots{$l1}{$l2}{$l3}{depth}++;
                $max_day_needed_slots{$l2}--;
              } else {
                last;
              }
            }
          }
        }
      }
      #$debug_info .= "week $l1, event slots in row 1:  $slots_in_row{$l1}{1}\n";
      #$debug_info .= "week $l1 slot (4, 1) depth: $week_slots{$l1}{4}{1}{depth}\n";

      # yet another pass. trim vertical depth and re-calculate max_slots

      # calculate trim
      my $trim = 0;
      #$debug_info .= "\n week $l1 max slots: $week_max_slots{$l1}\n";


      #$debug_info .= "\nweek $l1, max_day_needed_slots: $max_day_needed_slots{0} $max_day_needed_slots{1} $max_day_needed_slots{2} $max_day_needed_slots{3} $max_day_needed_slots{4} $max_day_needed_slots{5} $max_day_needed_slots{6} $max_day_needed_slots{7}\n" if ($debug);

      $max_week_needed_slots = max(values %max_day_needed_slots);
      #$debug_info .= "week $l1 max_week_needed_slots: $max_week_needed_slots\n";

      #if ($max_day_needed_slots >$max_week_needed_slots)
      #  {$max_week_needed_slots = $max_day_needed_slots;}
      #$debug_info .= "max needed slots for week $l1, $max_week_needed_slots\n";

      my $trim = $week_max_slots{$l1} - $max_week_needed_slots;

      # apply trim
      #$debug_info .= "trim for week $l1, $trim\n";
      for ($l2=0;$l2<7;$l2++)   { # for each day of the week

        for ($l3=$week_max_slots{$l1};$l3>0;$l3--)   { # for each slot, counting backwards (upwards)

          if ($week_slots{$l1}{$l2}{$l3}{depth} > 0)  { # blank or non-blank, with depth > 0

            #$debug_info .= "trimming week $l1, slot ($l2, $l3) by $trim\n";
            $week_slots{$l1}{$l2}{$l3}{depth} = $week_slots{$l1}{$l2}{$l3}{depth} - $trim;
            last;
          }
        }
      }

      $week_max_slots{$l1} = $week_max_slots{$l1} - $trim;

    }  # repeat for next week

    # print day names
    if ($cal_month_idx == 0 || $show_month_breaks) {
      my @lowercase_day_names;
      foreach $day_name (@day_names) {
        push @lowercase_day_names, lc $day_name;
      }

      $return_text .=<<p1;
<table class="calendar" summary="">
<tr>
<td class="day_names $lowercase_day_names[0]">$weekday_sequence[0]</td>
<td class="day_names $lowercase_day_names[1]">$weekday_sequence[1]</td>
<td class="day_names $lowercase_day_names[2]">$weekday_sequence[2]</td>
<td class="day_names $lowercase_day_names[3]">$weekday_sequence[3]</td>
<td class="day_names $lowercase_day_names[4]">$weekday_sequence[4]</td>
<td class="day_names $lowercase_day_names[5]">$weekday_sequence[5]</td>
<td class="day_names $lowercase_day_names[6]">$weekday_sequence[6]</td>
</tr>
p1
    }

    #cal_date keeps track of the date (in timestamp format)
    #as the calendar loop iterates through each day on the calendar page
    $cal_date = $cal_start_date;
    @cal_date_array = gmtime $cal_date;

    #locked and loaded, data structures assembled--now it's time to kick it, calendar-style.
    for ($l1=0;$cal_date_array[4] != $next_month; $l1++)  { #each calendar has 5 or 6 weeks

      my $last_week=0;
      my $timestamp_next_week = $cal_date+604800;
      my @timestamp_next_week_array = gmtime $timestamp_next_week;

      my $week_date_index = $cal_date;

      # draw the table!
      for ($l3=0;$l3<$week_max_slots{$l1}+1;$l3++) {
        $return_text .="<tr id=\"week_$cal_date\">";

        $week_date_index = $cal_date;
        for ($l2=0;$l2<7;$l2++) { # 7 days / week

          @cal_date_array = gmtime $week_date_index;
          my $td_class = "day ".lc($day_names[$l2]);
          $td_class .= " today" if ($cal_date_array[4] == $rightnow_month &&
                                    $cal_date_array[3] == $rightnow_mday &&
                                    $cal_date_array[5]+1900 == $rightnow_year);

          # display date numbers differently, depending on whether they are in the current month or not
          my $cal_month_name = "";
          if ($show_month_breaks || $cal_num_months == 1) {
            $td_class .= " other_month" if ($cal_date_array[4] != $current_month);
          } else {
            $td_class .= " other_month_multi" if ($use_other_month[$cal_date_array[4] % 2]);
            $cal_month_name = $months[$cal_date_array[4]] if ($cal_date_array[3] == 1);
          }

          #if ($l2 == $week_events{$l1}{$week_slots{$l1}{$l2}{$l3}{id}}{start_weekday} && $week_events{$l1}{$week_slots{$l1}{$l2}{$l3}{id}}{start_weekday} ne "")

          if ($l3 == 0)  { #if it's the top blank slot, put the date in there.

            $td_style="border-bottom-width:0px;";

            #display the cell differently if it is today.
            if ($cal_date_array[4] == $rightnow_month &&
                $cal_date_array[3] == $rightnow_mday &&
                $cal_date_array[5]+1900 == $rightnow_year) {
              # offset the date number a few pixels
              # (so it will be in the center of the red circle)
              # offset a bit more for a double-digit day number.
              # small touches are the difference between good and great :)

              my $date_div_style = "";
              $date_div_style = "text-indent: 11px;" if ($rightnow_mday > 10);

              $return_text .=<<p1;
<td class="$td_class" style="$td_style" onmousedown="if (event.shiftKey) return show_day_contextmenu(event, $week_date_index); else return false;" oncontextmenu="return show_day_contextmenu(event, $week_date_index);">
<div class="date today" style="$date_div_style"><a id="today"></a>$cal_date_array[3]&nbsp;$cal_month_name</div>
</td>
p1
            } else {
              $return_text .=<<p1;
<td class="$td_class" style="$td_style" onmousedown="if (event.shiftKey) return show_day_contextmenu(event, $week_date_index); else return false;" oncontextmenu="return show_day_contextmenu(event, $week_date_index);">
<div class="date">$cal_date_array[3]&nbsp;$cal_month_name</div>
</td>
p1
            }
          } elsif ($week_slots{$l1}{$l2}{$l3}{spacer} != 0)  { # spacer slot

            my $spacer_class = "spacer";
            if ($l3 == $week_max_slots{$l1}-1) {
              $spacer_class .= " bottom";
            }
            $return_text .=<<p1;
<td class="$td_class $spacer_class" style="$td_style" colspan=1 rowspan=1 onmousedown="if (event.shiftKey) return show_day_contextmenu(event, $week_date_index); else return false;" oncontextmenu="return show_day_contextmenu(event, $week_date_index);">
</td>
p1
          } elsif ($week_slots{$l1}{$l2}{$l3}{width} != 0)  { # slot containing events

            $num_cols = $week_slots{$l1}{$l2}{$l3}{width};
            $num_rows = $week_slots{$l1}{$l2}{$l3}{depth};

            if (scalar @{$week_slots{$l1}{$l2}{$l3}{ids}} > 0) {

              $td_style="border-top-width:0px;border-bottom-width:0px;";

#($l2,$l3) $num_cols\lx$num_rows
              $return_text .=<<p1;
<td class="$td_class" style="$td_style" colspan=$num_cols rowspan=$num_rows onmousedown="if (event.shiftKey) return show_day_contextmenu(event, $week_date_index); else return false;" oncontextmenu="return show_day_contextmenu(event, $week_date_index);">
p1

              foreach $event_id (@{$week_slots{$l1}{$l2}{$l3}{ids}}) {
                my $multi_day_event = ($week_slots{$l1}{$l2}{$l3}{width} > 1) ? 1:0;

                my $background_event = (&contains($events{$event_id}{cal_ids}, $current_calendar{id})) ? 0:1;

                $return_text .= &display_calendar_event($event_id, $multi_day_event, $background_event)
              }

              $return_text .=<<p1;
</td>
p1
            } elsif ($week_slots{$l1}{$l2}{$l3}{ids} eq "" && $week_slots{$l1}{$l2}{$l3}{width} > 0)  { # blank slot

              $td_style="border-top-width:0px;border-bottom-width:0px;";

#($l2,$l3) blank $num_cols\lx$num_rows
              $return_text .=<<p1;
<td class="$td_class" style="$td_style" colspan=$num_cols rowspan=$num_rows onmousedown="if (event.shiftKey) return show_day_contextmenu(event, $week_date_index); else return false;" oncontextmenu="return show_day_contextmenu(event, $week_date_index);">
</td>
p1
            }
          }
          $week_date_index += 86400;
        }  # next day (first row)

        #right border
        $return_text .=<<p1;
</tr>
p1
      } # event slot index


      # this little trick is the cat's pajamas.  It's another row of
      # table cells that cause each calendar day to come down a little
      # bit below the lowest esvent.  It makes the calendar look sharp.

      # Also, if the week has a small number of events, we expand the height of the bottom cell.
      # This makes all the calendar cells look square, which is the bee's knees.

      my $bottom_height_style = "";
      if ($max_day_events{$l1} < 2) {
        my $height = (4-$max_day_events{$l1}) . "em";   # this algorithm was developed by guess & check
        #my $height = "100px";   # this algorithm was developed by guess & check
        $bottom_height_style = "line-height:$height;";
      }
      $return_text .=<<p1;
<tr style="$bottom_height_style">
p1
      $week_date_index = $cal_date;
      for ($l2=0;$l2<7;$l2++) { #each week has 7 days(!)

        my $td_class = "";
        @cal_date_array = gmtime $week_date_index;
        $td_class .= "day ".lc($day_names[$l2])." cell_bottom";

        $td_class .= " today" if ($cal_date_array[4] == $rightnow_month &&
                                  $cal_date_array[3] == $rightnow_mday &&
                                  $cal_date_array[5]+1900 == $rightnow_year);

        if ($show_month_breaks || $cal_num_months == 1) {
          $td_class .= " other_month" if ($cal_date_array[4] != $current_month);
        } else {
          $td_class .= " other_month_multi" if ($use_other_month[$cal_date_array[4] % 2]);
        }

        $return_text .=<<p1;
<td class="$td_class" style="line-height:5px;border-top-width:0px;$bottom_height_style"  onmousedown="if (event.shiftKey) return show_day_contextmenu(event, $week_date_index); else return false;" oncontextmenu="return show_day_contextmenu(event, $week_date_index);">&nbsp;</td>
p1
        $week_date_index+=86400;
      }
      $return_text .=<<p1;
</tr>
p1
      $cal_date+=604800;
      @cal_date_array = gmtime $cal_date;
    }

#close table tag for each month or only for last month on continuous_multimonth mode
if ($show_month_breaks || $last_cal_month) {
    $return_text .=<<p1;
</table>
<br style="page-break-after:always;">
p1
}

    #increment to the next month--the method used
    #here is the most painless way of making
    #this work the right way in all cases.
    $current_month++;
    $cal_month_idx++;
    
    if ($current_month == 12) {
      $current_month=0;
      $current_year++;
    }
  }

  return $return_text;
}  #********************end render_calendar subroutine**********************


sub background_event_colorize {
  my ($event_id, $calendar_id) = @_;

  my %event = %{$events{$event_id}};
  my %calendar = %{$calendars{$calendar_id}};
  my $event_bgcolor = $event{bgcolor};


  if ($calendars{$event{cal_ids}[0]}{calendar_events_color} ne "") {
$event_bgcolor = $calendars{$event{cal_ids}[0]}{calendar_events_color};}


  if ($calendar{background_events_display_style} eq "single_color") {
$event_bgcolor = $calendar{background_events_color};} elsif ($calendar{background_events_display_style} eq "faded") {
    # create "faded" look for background event
    my $faded_color = $event_bgcolor;

    #convert rgb values from hex (00-FF) to decimal integer (0-255)
    my $r = hex substr $faded_color,1,2;
    my $g = hex substr $faded_color,3,2;
    my $b = hex substr $faded_color,5,2;

    #convert integer rgb values to hsv
    my @hsv_array = &rgb2hsv($r,$g,$b);

    #convert s and v from percentages to decimal
    $hsv_array[1] = $hsv_array[1]/100;
    $hsv_array[2] = $hsv_array[2]/100;

    #"fade" the color (decrease saturation)
    $hsv_array[1] = $hsv_array[1]/$calendar{background_events_fade_factor};

    my @new_rgb_array = &hsv2rgb($hsv_array[0],$hsv_array[1],$hsv_array[2]);

    #convert back to hex
    $r = (sprintf ("%1.1X",$new_rgb_array[0]));
    $g = (sprintf ("%1.1X",$new_rgb_array[1]));
    $b = (sprintf ("%1.1X",$new_rgb_array[2]));

    $event_bgcolor = "#$r$g$b";
  }

   return $event_bgcolor;


}

sub display_calendar_event {
  my ($event_id, $multi_day, $background_event) = @_;
  my %event = %{$events{$event_id}};
  my $results = "";

  my $event_bgcolor = $event{bgcolor};

  # force white color if the background is dark
  my $textcolor_style = "";
  my $r = hex substr $event_bgcolor,1,2;
  my $g = hex substr $event_bgcolor,3,2;
  my $b = hex substr $event_bgcolor,5,2;
  my $bright = ($r*299+$g*587+$b*114)/1000;
  $textcolor_style = "color:#fff" if ($bright < 128);

  $event_bgcolor = $current_calendar{calendar_events_color} if ($current_calendar{calendar_events_color} ne "");

  my $event_box_class = "event_box";

  # handle link
  my $event_link = "javascript:display_event('$event_id');";
  $event_link = "$event{details}" if ($event{details_url} eq "1");

  if ($background_event) {
    $event_box_class .= " background";
    $event_bgcolor = &background_event_colorize($event_id, $current_calendar{id});
  }

  # handle icon
  my $icon_text = "";
  my $unit_icon_text = "";
  if ($event{unit_number} ne "") {
    $unit_icon_text = $event{unit_number}." ";
    $unit_icon_text =~ s/(\d)/<img src="$graphics_url\/unit_number_patch_$1_16x10.gif" border="0" alt=\"\" vspace=0 hspace=0 style="vertical-align:middle;">/g;
  }

  my $link_style="";
  if ($event{icon} ne "blank" && $event{icon} ne "") {
    $icon_text = <<p1;
<img align="bottom" src = "$icons_url/$event{icon}_16x16.gif" style="margin-left:-22px;margin-right:5px;margin-bottom:-5px;" alt="">
p1
    chomp $icon_text;
    $link_style="padding-left:29px";
  }

  # context menu stuff
  my $event_context_menu_text="onmousedown=\"if (event.shiftKey) return show_event_contextmenu(event, $event_id, '$event_bgcolor', '$event{series_id}'); else return false; \" oncontextmenu=\"return show_event_contextmenu(event, $event_id, '$event_bgcolor', '$event{series_id}');\"";
  $event_context_menu_text = "" if ($event_id =~ /\D/);

  if ($multi_day == 0) {
    my $event_time = "";
    if ($event{all_day_event} ne "1") {
      $event_time = &nice_time_range_format($event{start}, $event{end});
      $event_time = "<span class=\"event_time\" style=\"$textcolor_style;\"> $event_time </span><br/>";
    }


    my $temp_item_text = $calendar_item_template;
    $temp_item_text =~ s/###icon###/$icon_text$unit_icon_text/g;
    $temp_item_text =~ s/###title###/$event{title}/g;
    $temp_item_text =~ s/###time###/$event_time/g;
    my $calendar_title = $calendars{$event{cal_ids}[0]}{title};
    $temp_item_text =~ s/###calendar title###/$calendar_title/g;

    $results .=<<p1;
<a href="$event_link" class="$event_box_class" style="display:block;text-align:left;$link_style;background-color:$event_bgcolor;$textcolor_style;cursor:pointer;cursor:hand;" $event_context_menu_text>
$temp_item_text</a>
p1

  } else { # multi-day-event

    # handle the case where an event is < 24 hours and crosses midnight.
    my $nudge_edge="";
    my $event_time = "";

    if ($event{all_day_event} ne "1") {
      if ($event{end} - $event{start} < 86400) {
        my $offset = 25;
        my $width = 50;
        $nudge_edge = "width:$width%;position:relative;left:$offset%;";
      }

      $event_time = &nice_time_range_format($event{start}, $event{end});
      $event_time = "<span class=\"event_time\" style=\"$textcolor_style;\"> $event_time </span>";
    }

    if ($event{icon} ne "blank" && $event{icon} ne "") {
      $icon_text = <<p1;
<img src="$icons_url/$event{icon}_16x16.gif" style="vertical-align:middle;margin-right:5px;" alt="">
p1
      chomp $icon_text;
    }

    my $temp_item_text = $calendar_item_template;
    $temp_item_text =~ s/###icon###/$icon_text$unit_icon_text/g;
    $temp_item_text =~ s/###title###/$event{title}/g;
    $temp_item_text =~ s/###time###/$event_time/g;
    my $calendar_title = $calendars{$event{cal_ids}[0]}{title};
    $temp_item_text =~ s/###calendar title###/$calendar_title/g;

    $results .=<<p1;
<a href="$event_link" class="$event_box_class" style="display:block;text-align:center;background-color:$event_bgcolor;$textcolor_style;cursor:pointer;cursor:hand;$nudge_edge" $event_context_menu_text>
$temp_item_text</a>
p1
    }
}




sub display_list_event {
  my ($event_id, $background_event, $sameday) = @_;
  my %event = %{$events{$event_id}};
  my $results="";

  @event_start_timestamp_array = gmtime $event{start};

  my $date_string;
  my $weekday_string;

  if ($event{days} == 1) {
 #single-day event
    $date_string="$months_abv[$event_start_timestamp_array[4]] $event_start_timestamp_array[3]";
    $weekday_string = $day_names_abv[$event_start_timestamp_array[6]]
  } else { #multi-day event

    @event_end_timestamp_array = gmtime $event{end};
    if ($event_start_timestamp_array[4] eq $event_end_timestamp_array[4]) {
      $date_string="$months_abv[$event_start_timestamp_array[4]] $event_start_timestamp_array[3]-$event_end_timestamp_array[3]";
    } else {
      $date_string="$months_abv[$event_start_timestamp_array[4]] $event_start_timestamp_array[3] - $months_abv[$event_end_timestamp_array[4]] $event_end_timestamp_array[3]";
    }
    $weekday_string = "$day_names_abv[$event_start_timestamp_array[6]]-$day_names_abv[$event_end_timestamp_array[6]]";
  }

  # weekday abbreviations
  my $weekday_abv_string = $weekday_string;
  for ($l1=0;$l1<scalar @day_names;$l1++) {
    $weekday_abv_string =~ s/$day_names[$l1]/$day_names_abv[$l1]/g;
  }

  my $icon_text="";
  my $unit_icon_text="";
  if ($event{unit_number} ne "") {
    $icon_text = $event{unit_number};
    $icon_text =~ s/(\d)/<img src="$graphics_url\/unit_number_patch_$1_16x10.gif" style=\"position:relative;top:5px;\" alt=\"\">/g;
  }

  if ($event{icon} eq "blank" || $event{icon} eq "") {
    $icon_text .= "$unit_icon_text";
  } else {
    $icon_text .= "$unit_icon_text<img src = \"$icons_url/$event{icon}_16x16.gif\" style=\"position:relative;top:5px;\" alt=\"\">";
  }

  my $event_bgcolor = $event{bgcolor};

  if ($calendars{$event{cal_ids}[0]}{calendar_events_color} ne "") {
$event_bgcolor = $calendars{$event{cal_ids}[0]}{calendar_events_color};}

  if ($background_event eq "1") {
    $event_bgcolor = &background_event_colorize($event_id, $current_calendar{id});
  }


  my $event_context_menu_text="onmousedown=\"if (event.shiftKey) return show_event_contextmenu(event, $event{id}, '$event{bgcolor}', '$event{series_id}'); else return false;\" oncontextmenu=\"return show_event_contextmenu(event, $event{id}, '$event{bgcolor}', '$event{series_id}');\"";
  if ($event_id =~ /\D/) {
$event_context_menu_text=""}

  my $day_context_menu_text = "onmousedown=\"if (event.shiftKey) return show_day_contextmenu(event, $event{start}); else return false;\" oncontextmenu=\"return show_day_contextmenu(event, $event{start});\"";

  # event time
  my $event_time = "";
  if ($event{all_day_event} ne "1") {
    $event_time = &nice_time_range_format($event{start}, $event{end});
    $event_time = "<span class=\"event_time\">$event_time</span>";
  }

  my $event_link = "javascript:display_event('$event{id}');";
  if ($event{details_url} eq "1") {
$event_link = "$event{details}";}

  my $margin_top="7px";
  $margin_top = "0" if ($sameday);


  my $temp_item_text = $list_item_template;


  $temp_item_text =~ s/###variable_margin###/$margin_top/g;
  $temp_item_text =~ s/###event_contextmenu###/$event_context_menu_text/g;
  $temp_item_text =~ s/###day_contextmenu###/$day_context_menu_text/g;
  $temp_item_text =~ s/###id###/$event_id/g;
  $temp_item_text =~ s/###bgcolor###/$event_bgcolor/g;
  $temp_item_text =~ s/###link###/$event_link/g;
  $temp_item_text =~ s/###details###/$event{details}/g;
  $temp_item_text =~ s/###icon###/$icon_text/g;
  $temp_item_text =~ s/###title###/$event{title}/g;
  $temp_item_text =~ s/###date###/$date_string/g;
  $temp_item_text =~ s/###weekday###/$weekday_string/g;
  $temp_item_text =~ s/###weekday_abv###/$weekday_abv_string/g;
  $temp_item_text =~ s/###time###/$event_time/g;


  $results .= $temp_item_text;

  $no_results .=<<p1;
<li style="padding:0;margin:0;margin-top:$margin_top;"$event_context_menu_text>
<span class="small_note" style="margin:0;border:0;vertical-align:middle;width:7em;white-space:nowrap;text-align:right;cursor:pointer;cursor:hand;"  onclick="display_event('$event_id')" > $date_string </span>
<a class="event_box" style="text-align:left;white-space:nowrap;background-color:$event_bgcolor;" href="$event_link"> $icon_text $event_time $event{title}</a>
</li>
p1




  return $results;
}



sub render_list {
  my $return_text = "";
  ($start_month, $start_year, $end_month, $end_year) = @_;

  #calculate where to start and end the list

  #format for timegm: timegm($sec,$min,$hour,$mday,$mon,$year);
  my $list_start_timestamp = timegm(0,0,0,1,$start_month,$start_year);
  my $list_end_timestamp = &find_end_of_month($end_month, $end_year);

  # loop through all the events.

  #Create an array of events which fall
  # within the current list view dates
  my @selected_cal_events;

  #and a funky data structure for the background calendars
  # each element of this hash will be an array.
  my $shared_cal_events={};  #empty hash

  foreach $event_id (keys %events) {
    if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$list_start_timestamp,$list_end_timestamp)) {
      my $event_in_current_calendar = 0;

      foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
        if ($temp_cal_id eq $current_cal_id) {
push @selected_cal_events, $event_id;}

        foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
          if ($temp_cal_id eq $background_cal_id) {
            if ($current_calendar{list_background_calendars_together} eq "yes") {
              push @selected_cal_events, $event_id;
            } else {
              push @{$shared_cal_events{$background_cal_id}}, $event_id if (!&contains(\@selected_cal_events, $event_id));
            }
          }
        }
      }
    }
  }

  # initialize loop variables
  $current_month = $start_month;
  $current_year = $start_year;

    $return_text .=<<p1;
p1

  while ($current_year < $end_year || ($current_year == $end_year && $current_month <= $end_month)) {
    my $current_month_start_timestamp = timegm(0,0,0,1,$current_month,$current_year);
    my $current_month_end_timestamp = &find_end_of_month($current_month, $current_year);

    $return_text .=<<p1;
<div class="list_month_box">
p1

    if ($cal_num_months> 1) {
      $return_text .=<<p1;
$months[$current_month] $current_year
p1
    }

    if ($current_calendar{list_background_calendars_together} eq "yes") {
      $return_text .=<<p1;
<ul class="list_cal_box" style="list-style-type:none;float:left;text-align:left;">
<div style="text-align:center;font-weight:bold;">$calendars{$current_cal_id}{title}</div>
p1
      #display events for selected calendar
      my $previous_event_id;
      foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @selected_cal_events) {
        my %event = %{$events{$event_id}};
        if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
          my $background_event = "";
          $background_event = "1" if ($event{cal_ids}[0] ne $current_cal_id);

          my @temp1 = gmtime($event{start});
          my @temp2 = gmtime($events{$previous_event_id}{start});

          my $sameday = "";
          $sameday = "1" if ($temp1[3] == $temp2[3]);

          $return_text .= &display_list_event($event_id, $background_event, $sameday);
          $previous_event_id = $event_id;
        }
      }
      $return_text .=<<p1;
</ul>
p1
    } else {
      $return_text .=<<p1;
<ul class="list_cal_box" style="list-style-type:none;float:left;text-align:left;">
<li style="text-align:center;font-weight:bold;">$calendars{$current_cal_id}{title}</li>
p1
      #display events for selected calendar
      my $previous_event_id;

      foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @selected_cal_events) {
        my %event = %{$events{$event_id}};
        if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
          my @temp1 = gmtime($event{start});
          my @temp2 = gmtime($events{$previous_event_id}{start});

          my $sameday = "";
          $sameday = "1" if ($temp1[3] == $temp2[3]);

          $return_text .= &display_list_event($event_id,0,$sameday);
          $previous_event_id = $event_id;
        }
      }
      $return_text .=<<p1;
</ul>
p1

      foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
        $return_text .=<<p1;
<ul class="list_cal_box background" style="list-style-type:none;float:left;text-align:left;">
<li style="text-align:center;font-weight:bold;">$calendars{$background_cal_id}{title}</li>
p1
        #list events for that calendar
        my $previous_event_id;
        foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @{$shared_cal_events{$background_cal_id}}) {

          %event = %{$events{$event_id}};
          if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
            my @temp1 = gmtime($event{start});
            my @temp2 = gmtime($events{$previous_event_id}{start});

            my $sameday = "";
            $sameday = "1" if ($temp1[3] == $temp2[3]);

            $return_text .= &display_list_event($event_id,1,$sameday);
            $previous_event_id = $event_id;

          }
        }
        $return_text .=<<p1;
</ul>
<br style="clear:both;"/>  <!--needed because IE sucks-->
p1
      }
    }

    $return_text .=<<p1;
<br style="clear:both;"/> <!-- because IE sucks-->
<br style="clear:both;"/> <!-- because IE sucks-->
</div>
<br style="clear:both;"/> <!-- because IE sucks-->
<br style="clear:both;"/> <!-- because IE sucks-->
p1

    #increment to the next month--the method used
    #here is the most painless way of making
    #this work the right way in all cases.
    $current_month +=1;
    if ($current_month == 12) {
      $current_month=0;
      $current_year++;
    }
  }

  $return_text .=<<p1;
p1
  return $return_text;

}  #********************end generate_list subroutine**********************


sub generate_event_details_javascript {
  my ($events_start_timestamp, $events_end_timestamp) = @_;

  my $return_string="";

  my $num_events = 0;
  my $num_remote_events = 0;
  my $event_defs="";
  my $remote_event_defs="";

  $index=0;

  #loop through the events, check to see if they fall
  #within the current calendar month
  foreach $event_id (keys %events) {
    my %event = %{$events{$event_id}};
    if (&time_overlap($event{start},$event{end},$events_start_timestamp,$events_end_timestamp)) {

      if ($event_id =~ /^r/) {
        $num_remote_events++;
        $remote_event_defs .= <<p1;
remote_event_details["$event_id"] = new Object;
remote_event_details["$event_id"].url = "$event{remote_calendar}{url}?view_event=1&evt_id=$event{remote_event_id}";
p1

      }
    }
  }

  $return_string .=<<p1;
var remote_event_details = new Array($num_remote_events);
$remote_event_defs
var event_details = new Array($num_events);
$event_defs
p1
  return $return_string;

}  #********************end generate_event_details_javascript subroutine**********************



sub pending_events_visible {
  # display pending events for this calendar?
  if ($options{pending_events_display} eq '0' || $options{pending_events_display} eq '1' ||
      ($options{pending_events_display} eq '2' && $logged_in_as_current_cal_user) ||   # logged-in user of this calendar
      ($options{pending_events_display} eq '3' && $logged_in_as_current_cal_user) ||   # logged-in user of this calendar
      ($options{pending_events_display} eq '3' && $logged_in_as_current_cal_admin) ||   # logged-in admin of this calendar
      $logged_in_as_root  # root
  ) {return 1};

  return undef;
}

sub forced_login {
  my $results = "";

  $results .= <<p1;
<form name="forced_login_form" id="update_cal_form" action="" method="POST">
<input type="hidden" name="active_tab" value="$active_tab">
<input type="hidden" name="cal_id" value="$current_cal_id"/>
<div class="info_box" style="clear:both;">
<p class="cal_title" style="text-align:center;">
$lang{login}
</p>
<div class="leftcol" style="">
<label class="required_field" for="cal_password">$lang{cal_password}</label>
</div>

<div class="rightcol" style="white-space:nowrap;">
<input type="password" name="cal_password" id="cal_password" size=12 />
<span class="small_note" ><a style="vertical-align:top;" href="javascript:display_help('current_password','$lang{cal_password}')">$lang{help_on_this}</a></span>
</div>

<div class="leftcol">
&nbsp;
</div>
<div class="rightcol" style="white-space:nowrap;">
<input type="submit" value="$lang{submit}"/>
</div>
<br style="clear:both;"/>
</div>
</form>
p1

  return $results;
}

sub generate_logged_in_stuff {
  # events & calendars pending approval, etc.

  my $results = "";

  #if ($options{pending_events_display} > 1)
  #{
  #}

  my $pending_events_text = "";
  # display pending events for this calendar?
  #$debug_info .= "pending_events_visible: ".(&pending_events_visible)."\n";

  if (&pending_events_visible) {
    foreach $new_event_id (keys %new_events) {
      push @pending_events_to_display, $new_event_id;
    }

    #$debug_info .= "scalar @ pending_events_to_display: ".(scalar @pending_events_to_display)."\n";

    if (scalar @pending_events_to_display > 0) {
      $pending_events_text .= "<a href=\"javascript:approve_pending_events_toggle()\">";
      $pending_events_text .= (scalar @pending_events_to_display)." ";

      if (scalar @pending_events_to_display == 1) {
        $pending_events_text .= $lang{pending_event1};
      } else {
        $pending_events_text .= $lang{pending_event2};
      }
      $pending_events_text .= "</a>";
    }
  }

  # display pending events for other calendars?
  #if ($options{pending_events_display}) {
  #s}

  if ($pending_events_text ne "") {
    $results .= "$pending_events_text <div style=\"text-align:right;\" id=\"pending_events\"></div>";
  }

  return $results;
}





sub csv_file_palm {

  ($start_month, $start_year, $end_month, $end_year) = @_;

  #calculate where to start and end the list

  #format for timegm: timegm($sec,$min,$hour,$mday,$mon,$year);
  my $list_start_timestamp = timegm(0,0,0,1,$start_month,$start_year);
  my $list_end_timestamp = &find_end_of_month($end_month, $end_year);

  #@cal_month_start_date_array = gmtime $cal_month_start_date;

  # loop through all the events.

  #Create an array of events which fall
  # within the current list view dates
  my @selected_cal_events;

  #and a funky data structure for the background calendars
  # each element of this hash will be an array.
  my $shared_cal_events={};  #empty hash

  foreach $event_id (keys %events) {
    if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$list_start_timestamp,$list_end_timestamp)) {
      my $event_in_current_calendar = 0;

      foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
        if ($temp_cal_id eq $current_cal_id) {
push @selected_cal_events, $event_id;}
        foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
          if ($temp_cal_id eq $background_cal_id) {
push @{$shared_cal_events{$background_cal_id}}, $event_id;}
        }
      }
    }
  }

  $html_output =<<p1;
Cache-control: no-cache,no-store,private
Content-disposition: filename="events.csv"
Content-Type: text/csv; charset=$lang{charset}\n
p1
  #initialize loop variables
  #$current_timestamp = $list_start_timestamp;
  $current_month = $start_month;
  $current_year = $start_year;

  $html_output .=<<p1;
CSV datebook: Category, Private, Description, Note, Event, Begin, End, Alarm, Advance, Advance Units, Repeat Type, Repeat Forever, Repeat End, Repeat Frequency, Repeat Day, Repeat Days, Week Start, Number of Exceptions, Exceptions
p1


  while ($current_year < $end_year || ($current_year == $end_year && $current_month <= $end_month)) {
    my $current_month_start_timestamp = timegm(0,0,0,1,$current_month,$current_year);
    my $current_month_end_timestamp = &find_end_of_month($current_month, $current_year);
    #display events for selected calendar
    foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @selected_cal_events) {
      my %event = %{$events{$event_id}};

      if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
        my $csv_subject = "$event{title}";

        @event_start_timestamp_array = gmtime $event{start};
        my $csv_start_date = ($event_start_timestamp_array[5]+1900)." ".($event_start_timestamp_array[4]+1)." ".($event_start_timestamp_array[3]);
        my $csv_start_time = "$event_start_timestamp_array[2]:$event_start_timestamp_array[1]";

        @event_end_timestamp_array = gmtime $event{end};
        my $csv_end_date = ($event_end_timestamp_array[5]+1900)." ".($event_end_timestamp_array[4]+1)." ".($event_end_timestamp_array[3]);
        my $csv_end_time = "$event_end_timestamp_array[2]:$event_end_timestamp_array[1]";

        my $csv_description = $event{details};
        $csv_description =~ s/"/""/g;
        $csv_description =~ s/\n/\\n/g;

        if ($event{days} != 1) {
          @event_end_timestamp_array = gmtime $event{end};
          $csv_end_date = ($event_end_timestamp_array[5]+1900)." ".($event_end_timestamp_array[4]+1)." ".($event_end_timestamp_array[3]);
        }

        $html_output .=<<p1;
"$calendars{$current_cal_id}{title}","0","$csv_subject","$csv_description","1","$csv_start_date $csv_start_time","$csv_end_date $csv_end_time","0","0","0","0","1","$csv_end_date","0","0","0000000","0","0",""
p1
      }
    }
    foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
      #list events for that calendar
      foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @{$shared_cal_events{$background_cal_id}}) {
        my %event = %{$events{$event_id}};

        if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
          my $csv_subject = "$event{title}";

          @event_start_timestamp_array = gmtime $event{start};
          my $csv_start_date = ($event_start_timestamp_array[5]+1900)." ".($event_start_timestamp_array[4]+1)." ".($event_start_timestamp_array[3]);
          my $csv_start_time = "$event_start_timestamp_array[2]:$event_start_timestamp_array[1]";

          @event_end_timestamp_array = gmtime $event{end};
          my $csv_end_date = ($event_end_timestamp_array[5]+1900)." ".($event_end_timestamp_array[4]+1)." ".($event_end_timestamp_array[3]);
          my $csv_end_time = "$event_end_timestamp_array[2]:$event_end_timestamp_array[1]";

          my $csv_description = $event{details};
          $csv_description =~ s/"/""/g;
          $csv_description =~ s/\n/\\n/g;

          $csv_description =~ s/"/""/g;
          $csv_description =~ s/\n/\\n/g;


          if ($event{days} != 1) {
            @event_end_timestamp_array = gmtime $event{end};
            $csv_end_date = ($event_end_timestamp_array[5]+1900)." ".($event_end_timestamp_array[4]+1)." ".($event_end_timestamp_array[3]);
          }

          $html_output .=<<p1;
"$calendars{$background_cal_id}{title}","0","$csv_subject","$csv_description","1","$csv_start_date $csv_start_time","$csv_end_date $csv_end_time","0","0","0","0","1","$csv_end_date","0","0","0000000","0","0",""
p1
        }
      }
    }

    #increment to the next month--the method used
    #here is the most painless way of making
    #this work the right way in all cases.
    $current_month +=1;
    if ($current_month == 12) {
      $current_month=0;

      $current_year++;
    }
  }
  $html_output .= $debug_info;
  print $html_output;
}




sub csv_file {

  ($start_month, $start_year, $end_month, $end_year) = @_;

  #calculate where to start and end the list

  #format for timegm: timegm($sec,$min,$hour,$mday,$mon,$year);
  my $list_start_timestamp = timegm(0,0,0,1,$start_month,$start_year);
  my $list_end_timestamp = &find_end_of_month($end_month, $end_year);

  #@cal_month_start_date_array = gmtime $cal_month_start_date;

  # loop through all the events.

  #Create an array of events which fall
  # within the current list view dates
  my @selected_cal_events;

  #and a funky data structure for the background calendars
  # each element of this hash will be an array.
  my $shared_cal_events={};  #empty hash

  foreach $event_id (keys %events) {
    if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$list_start_timestamp,$list_end_timestamp)) {
      my $event_in_current_calendar = 0;

      foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
        if ($temp_cal_id eq $current_cal_id) {
push @selected_cal_events, $event_id;}
        foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
          if ($temp_cal_id eq $background_cal_id) {
push @{$shared_cal_events{$background_cal_id}}, $event_id;}
        }
      }
    }
  }

  $html_output =<<p1;
Cache-control: no-cache,no-store,private
Content-disposition: filename="events.csv"
Content-Type: text/plain; charset=$lang{charset}\n\n
p1
  #initialize loop variables
  #$current_timestamp = $list_start_timestamp;
  $current_month = $start_month;
  $current_year = $start_year;

  $html_output .=<<p1;
"Subject","Start Date","Start Time","End Date","End Time","All day event","Reminder on/off","Reminder Date","Reminder Time","Meeting Organizer","Required Attendees","Optional Attendees","Meeting Resources","Billing Information","Categories","Description","Location","Mileage","Priority","Private","Sensitivity","Show time as"
p1


  while ($current_year < $end_year || ($current_year == $end_year && $current_month <= $end_month)) {
    my $current_month_start_timestamp = timegm(0,0,0,1,$current_month,$current_year);
    my $current_month_end_timestamp = &find_end_of_month($current_month, $current_year);
    #display events for selected calendar
    foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @selected_cal_events) {
      my %event = %{$events{$event_id}};

      if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
        my $csv_subject = "$event{title} ($calendars{$current_cal_id}{title})";

        @event_start_timestamp_array = gmtime $event{start};
        my $csv_start_date = ($event_start_timestamp_array[4]+1)."/$event_start_timestamp_array[3]/".($event_start_timestamp_array[5]+1900);
        my $csv_start_time = ($event_start_timestamp_array[2]).":$event_start_timestamp_array[1]:".($event_start_timestamp_array[0]);

        @event_end_timestamp_array = gmtime $event{end};
        my $csv_end_date = ($event_end_timestamp_array[4]+1)."/$event_end_timestamp_array[3]/".($event_end_timestamp_array[5]+1900);
        my $csv_end_time = ($event_end_timestamp_array[2]).":$event_end_timestamp_array[1]:".($event_end_timestamp_array[0]);

        my $csv_description = $event{details};
        $csv_description =~ s/"/""/g;
        $csv_description =~ s/\n/\\n/g;

        if ($event{days} != 1) {
          @event_end_timestamp_array = gmtime $event{end};
          $csv_end_date = ($event_end_timestamp_array[4]+1)."/$event_end_timestamp_array[3]/".($event_end_timestamp_array[5]+1900);
        }

        $html_output .=<<p1;
"$csv_subject","$csv_start_date","$csv_start_time",$csv_end_date,"$csv_end_time","True","True","$csv_start_date","12:00:00 AM",,,,,,,"$csv_description",,,"Normal","False","Normal","1"
p1
      }
    }
    foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
      #list events for that calendar
      foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @{$shared_cal_events{$background_cal_id}}) {
        my %event = %{$events{$event_id}};

        if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
          my $csv_subject = "$event{title} ($calendars{$background_cal_id}{title})";

          @event_start_timestamp_array = gmtime $event{start};
          my $csv_start_date = ($event_start_timestamp_array[4]+1)."/$event_start_timestamp_array[3]/".($event_start_timestamp_array[5]+1900);
          my $csv_start_time = ($event_start_timestamp_array[2]).":$event_start_timestamp_array[1]:".($event_start_timestamp_array[0]);

          @event_end_timestamp_array = gmtime $event{end};
          my $csv_end_date = ($event_end_timestamp_array[4]+1)."/$event_end_timestamp_array[3]/".($event_end_timestamp_array[5]+1900);
          my $csv_end_time = ($event_end_timestamp_array[2]).":$event_end_timestamp_array[1]:".($event_end_timestamp_array[0]);

          my $csv_description = $event{details};
          $csv_description =~ s/"/""/g;
          $csv_description =~ s/\n/\\n/g;

          $csv_description =~ s/"/""/g;
          $csv_description =~ s/\n/\\n/g;


          if ($event{days} != 1) {
            @event_end_timestamp_array = gmtime $event{end};
            $csv_end_date = ($event_end_timestamp_array[4]+1)."/$event_end_timestamp_array[3]/".($event_end_timestamp_array[5]+1900);
          }

          $html_output .=<<p1;
"$csv_subject","$csv_start_date","$csv_start_time",$csv_end_date,"$csv_end_time","True","True","$csv_start_date","12:00:00 AM",,,,,,,"$csv_description",,,"Normal","False","Normal","1"
p1
        }
      }
    }

    #increment to the next month--the method used
    #here is the most painless way of making
    #this work the right way in all cases.
    $current_month +=1;
    if ($current_month == 12) {
      $current_month=0;

      $current_year++;
    }
  }
  $html_output .= $debug_info;
  print $html_output;
}




sub vcalendar_export_cal {
  ($start_month, $start_year, $end_month, $end_year) = @_;

  #calculate where to start and end the list

  #format for timegm: timegm($sec,$min,$hour,$mday,$mon,$year);
  my $list_start_timestamp = timegm(0,0,0,1,$start_month,$start_year);
  my $list_end_timestamp = &find_end_of_month($end_month, $end_year);

  # loop through all the events.

  #Create an array of events which fall
  # within the current list view dates
  my @selected_cal_events;

  #and a funky data structure for the background calendars
  # each element of this hash will be an array.
  my $shared_cal_events={};  #empty hash

  foreach $event_id (keys %events) {
    if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$list_start_timestamp,$list_end_timestamp)) {
      my $event_in_current_calendar = 0;

      foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
        if ($temp_cal_id eq $current_cal_id) {
push @selected_cal_events, $event_id;}
        foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
          if ($temp_cal_id eq $background_cal_id) {
push @{$shared_cal_events{$background_cal_id}}, $event_id;}
        }
      }
    }
  }



  $html_output =<<p1;
Cache-control: no-cache,no-store,private
Content-disposition: filename="events.vcs"
Content-Type: text/csv; charset=$lang{charset}

BEGIN:VCALENDAR
PRODID:-//Plans//EN
VERSION:1.0
METHOD:PUBLISH
p1
  #initialize loop variables
  #$current_timestamp = $list_start_timestamp;
  $current_month = $start_month;
  $current_year = $start_year;


  while ($current_year < $end_year || ($current_year == $end_year && $current_month <= $end_month)) {
    my $current_month_start_timestamp = timegm(0,0,0,1,$current_month,$current_year);
    my $current_month_end_timestamp = &find_end_of_month($current_month, $current_year);
    #display events for selected calendar
    foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @selected_cal_events) {
      my %event = %{$events{$event_id}};

      if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
        $html_output .= &event2vcal(\%event)."\n";
      }
    }
    foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
      #list events for that calendar
      foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @{$shared_cal_events{$background_cal_id}}) {
        my %event = %{$events{$event_id}};

        if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
          $html_output .= &event2vcal(\%event)."\n";
        }
      }
    }

    #increment to the next month--the method used
    #here is the most painless way of making
    #this work the right way in all cases.
    $current_month +=1;
    if ($current_month == 12) {
      $current_month=0;

      $current_year++;
    }
  }

  $html_output .=<<p1;
END:VCALENDAR
p1

  $html_output .= $debug_info;
  print $html_output;
}




sub ascii_text_cal {
  ($start_month, $start_year, $end_month, $end_year) = @_;

  #calculate where to start and end the list

  #format for timegm: timegm($sec,$min,$hour,$mday,$mon,$year);
  my $list_start_timestamp = timegm(0,0,0,1,$start_month,$start_year);
  my $list_end_timestamp = &find_end_of_month($end_month, $end_year);

  # loop through all the events.

  #Create an array of events which fall
  # within the current list view dates
  my @selected_cal_events;

  #and a funky data structure for the background calendars
  # each element of this hash will be an array.
  my $shared_cal_events={};  #empty hash

  foreach $event_id (keys %events) {
    if (&time_overlap($events{$event_id}{start},$events{$event_id}{end},$list_start_timestamp,$list_end_timestamp)) {
      my $done = 0;
      foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
        if ($temp_cal_id eq $current_cal_id) {
push @selected_cal_events, $event_id;}
        foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
          if ($temp_cal_id eq $background_cal_id) {
            push @{$shared_cal_events{$background_cal_id}}, $event_id;
            $done = 1;
            last;
          }
        }
        if ($done == 1) {last;}
      }
    }
  }

  $html_output =<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/plain; charset=$lang{charset}\n\n
p1
  #initialize loop variables
  #$current_timestamp = $list_start_timestamp;

  $current_month = $start_month;
  $current_year = $start_year;

  while ($current_year < $end_year || ($current_year == $end_year && $current_month <= $end_month)) {
    my $current_month_start_timestamp = timegm(0,0,0,1,$current_month,$current_year);
    my $current_month_end_timestamp = &find_end_of_month($current_month,$current_year);

    $html_output .=<<p1;

*******************************************
$months[$current_month] $current_year
*******************************************

* $current_calendar{title}
p1
    #display events for selected calendar
    foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @selected_cal_events) {
      %event = %{$events{$event_id}};

      if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
        @event_start_timestamp_array = gmtime $event{start};
        my $event_time = "";
        if ($event{days} == 1) {
 #single-day event
          $date_string="$months_abv[$event_start_timestamp_array[4]] $event_start_timestamp_array[3] ".($event_start_timestamp_array[5]+1900);
          if ($event{all_day_event} ne "1") {
            $event_time = &nice_time_range_format($event{start}, $event{end});
            $event_time = " ($event_time)";
          }
        } else { #multi-day event

          $date_string = &nice_date_range_format($event{start}, $event{end}, "-")." ".($event_start_timestamp_array[5]+1900);
        }
        my $event_details = $event{details};
        $event_details =~ s/\n[ \t\r\f]+/\n/g;
        chomp $event_details;

        #indent each line of the details
        $event_details =~ s/\n/\n    /g;


        $html_output .="  $date_string$event_time: $event{title}\n";
        if ($event_details ne "") {
          $html_output .= "    $event_details\n";
        }
        $html_output .= "\n";
      }
    }

    foreach $background_cal_id (keys %{$current_calendar{local_background_calendars}}) {
      $html_output .=<<p1;
* $calendars{$background_cal_id}{title}
p1
      #list events for that calendar
      foreach $event_id (sort {$events{$a}{start} <=> $events{$b}{start}} @{$shared_cal_events{$background_cal_id}}) {
        my %event = %{$events{$event_id}};

        if (&time_overlap($event{start},$event{end},$current_month_start_timestamp, $current_month_end_timestamp)) {
          @event_start_timestamp_array = gmtime $event{start};
          my $event_time = "";
          if ($event{days} == 1) {
 #single-day event
            $date_string="$months_abv[$event_start_timestamp_array[4]] $event_start_timestamp_array[3] ".($event_start_timestamp_array[5]+1900);
            if ($event{all_day_event} ne "1") {
            $event_time = &nice_time_range_format($event{start}, $event{end});
              $event_time = " ($event_time)";
            }
          } else { #multi-day event

            $date_string = &nice_date_range_format($event{start}, $event{end}, "-")." ".($event_start_timestamp_array[5]+1900);
          }
          my $event_details = $event{details};
          $event_details =~ s/\n[ \t\r\f]+/\n/g;
          chomp $event_details;

          #indent each line of the details
          $event_details =~ s/\n/\n    /g;


          $html_output .="  $date_string$event_time: $event{title}\n";
          if ($event_details ne "") {
            $html_output .= "    $event_details\n";
          }
          $html_output .= "\n";
        }
      }
    }

    #increment to the next month--the method used
    #here is the most painless way of making
    #this work the right way in all cases.
    $current_month +=1;
    if ($current_month == 12) {
      $current_month=0;
      $current_year++;
    }
  }
  $html_output .= $debug_info;
  print $html_output;

}  #********************end ascii_text_cal subroutine**********************

sub ascii_text_event {
  my %current_event = %{$events{$current_event_id}};

  $html_output =<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/plain; charset=$lang{charset}\n\n

p1

  my @event_start_timestamp_array = gmtime $current_event{start};
  my $date_string="";

  my $event_time = "";
  if ($current_event{days} == 1) {
 #single-day event
    $date_string="$months_abv[$event_start_timestamp_array[4]] $event_start_timestamp_array[3] ".($event_start_timestamp_array[5]+1900);
    if ($current_event{all_day_event} ne "1") {
      $event_time = &nice_time_range_format($current_event{start}, $current_event{end});
      $event_time = "($event_time)";
    }
  } else { #multi-day event

    $date_string = &nice_date_range_format($current_event{start}, $current_event{end}, "-")." ".($event_start_timestamp_array[5]+1900);
  }
  my $event_details = $current_event{details};
  $event_details =~ s/\n\s+/\n/g;
  $event_details =~ s/\n{2,}/\n/g;
  chomp $event_details;

  #indent each line of the details
  $event_details =~ s/\n/\n    /g;


  $html_output .="  $date_string$event_time: $current_event{title}\n";
  if ($event_details ne "") {
    $html_output .= "    $event_details\n\n";
  }
  $html_output .= $debug_info;
  print $html_output;

}  #********************end ascii_text_event subroutine**********************



sub icalendar_export_event  { # only for 1 event

  # when exporting to outlook, plans uses the vcalendar standard.
  # (http://www.imc.org/rfc2445)
  # This standard is horribly supported by MS outlook (outlook 2000, at the
  # time of this writing.  Outlook refuses to correctly interpret the
  # date-time strings in the following ways:

  # 1.  If the date-time parameter does not specify a time (only a date), do you
  # think outlook sets its "all-day event" flag?  Nope.  It just assumes the
  # event occurs at 000000 hours (12 midnight).

  # 2.  if no time zone is specified, the date-time string is supposed to be
  # interpreted as if it applied to the *current* timezone the user's computer
  # is in (according to the standard).  Do you think outlook does this?  Nope.
  # If no timezone is specified, outlook assumes the time zone is GMT.  As if this
  # weren't enough, outlook "helpfully" adjusts the time to the user's time zone.
  # Depending on how far a user is from GMT, this may cause the day to change.

  # Since there's no way to predict what time zone a user is in, it is impossible
  # to compensate on the server side for outlook's stupidity.  The workaround is
  # to generate event times for each event (even though this is misleading because
  # the events are all-day events), and force all the event times to 12 noon.
  # This puts them as far from the previous and next days as possible, giving the
  # least chance for outlook to screw up the day when it does its adjustment.

  my %current_event = %{$events{$current_event_id}};

  my $ical_string = &event2ical(\%current_event);

#Content-type: text/plain
#Last-modified: Wed, 30 Jan 2002 22:43:12 GMT
  $html_output =<<p1;
Content-type: text/x-vcalendar
Content-disposition: filename="event.ics"

BEGIN:VCALENDAR
PRODID:-//Plans//EN
VERSION:2.0
METHOD:PUBLISH
$ical_string
END:VCALENDAR

p1
  print $html_output;

}  #********************end vcalendar_export subroutine**********************






sub vcalendar_export_event  { # only for 1 event

  my %current_event = %{$events{$current_event_id}};

  $vcal_string .= &event2vcal(\%current_event);

  #my $last_modified = &formatted_time($rightnow, "md mn yy hh:mm:ss GMT");
  #Last-modified: $last_modified

#Content-type: text/plain
  $html_output =<<p1;
Content-type: text/vcs
Content-disposition: filename="event.vcs"

BEGIN:VCALENDAR
PRODID:-//Plans//EN
VERSION:1.0
METHOD:PUBLISH
$vcal_string
END:VCALENDAR

p1
  print $html_output;

}  #********************end vcalendar_export_event subroutine**********************



sub calculate_recurring_events {
  my ($start_timestamp, $recurrence_parms_ref) = @_;

  my %recurrence_parms = %{$recurrence_parms_ref};
  my @recurring_events_array = ();
  my @custom_months = @{$recurrence_parms{'custom_months'}};

  my @timestamp_array = gmtime $start_timestamp;

  #$debug_info .= "start timestamp: $start_timestamp\n";
  #foreach $custom_month (@custom_months)
  #  {$debug_info .= "custom month: $custom_month\n";}

  #my $start_timestamp = $start_timestamp+50;
  #calculate the weekday_in_month_count for the start timestamp
  # (is it the first tuesday?  second saturday?  This is required for
  # things to work right.

  $real_year = 1900 + $timestamp_array[5];
  $temp_start_timestamp = timegm(0,0,0,1,$timestamp_array[4],$real_year);
  #$debug_info .= "month_start_timestamp: $temp_start_timestamp\n";
  @temp_start_timestamp_array = gmtime($temp_start_timestamp);

#  $debug_info .= <<p1;
#start timestamp: $start_timestamp<br/>
#end timestamp: $recurrence_parms{'recur_end_timestamp'}<br/>
#the start timestamp ($months[$timestamp_array[4]] $timestamp_array[3], $real_year) <br/>
#the temp start timestamp ($months[$temp_start_timestamp_array[4]] $temp_start_timestamp_array[3], $temp_start_timestamp_array[5]) <br/>
#p1

  my $weekday_in_month_count = 0;
  #figure out what weekday of the month the start timestamp is
  for (;$temp_start_timestamp < $start_timestamp;$temp_start_timestamp+=86400) {
    @temp_start_timestamp_array = gmtime($temp_start_timestamp);
    if ($temp_start_timestamp_array[6] == $timestamp_array[6]) {
      $weekday_in_month_count++;
    }
  }

  #this must be done, or the week-of-month recurring dates will be hosed
  #@temp_array = gmtime $start_timestamp;
  #my $current_month = $temp_array[4];
  my $last_week=0;


  # set the start timestamp to a day boundary.
  my $boundary_timestamp = timegm(0,0,0,$timestamp_array[3],$timestamp_array[4],$real_year);

  my $timed_event_diff = $start_timestamp - $boundary_timestamp;
  $start_timestamp = $boundary_timestamp;

  #$debug_info .= "start timestamp (day boundary): $start_timestamp\n";



  # The recurring event algorithm loops through each day in the timeframe
  # and tests its validity against the recurrence parameters.

  # These tests take the form of "assumed valid unless proven otherwise"
  # Doing it this way lets the various recurrence type tests operate
  # independently of each other, while looping only once through the timeframe

  for ($recur_timestamp = $start_timestamp; $recur_timestamp <= $recurrence_parms{'recur_end_timestamp'}; $recur_timestamp += 86400) {
    $last_week=0;
    my @recur_timestamp_array = gmtime $recur_timestamp;
    my $current_month = $recur_timestamp_array[4];

    #look a week ahead, to see if the current weekday is the last one in the month
    my $recur_timestamp_next_week = $recur_timestamp+604800;
    my @recur_timestamp_next_week_array = gmtime $recur_timestamp_next_week;

    $last_week = 1 if ($current_month != $recur_timestamp_next_week_array[4]);

    $real_year = 1900 + $recur_timestamp_array[5];

    $recur_timestamp_valid=1;
    if ($recurrence_parms{'recurrence_type'} eq "same_day_of_month") {
      $recur_timestamp_valid=0 if ($recur_timestamp_array[3] != $timestamp_array[3]);
    } elsif ($recurrence_parms{'recurrence_type'} eq "same_day_of_week") {
      if ($recur_timestamp_array[6] != $timestamp_array[6]) {
        $recur_timestamp_valid=0;
      } elsif ($recurrence_parms{'weekday_of_month_type'} eq "only_first_week") {
        $recur_timestamp_valid=0 if ($weekday_in_month_count != 0);
      } elsif ($recurrence_parms{'weekday_of_month_type'} eq "only_second_week") {
        $recur_timestamp_valid=0 if ($weekday_in_month_count != 1);
      } elsif ($recurrence_parms{'weekday_of_month_type'} eq "only_third_week") {
        $recur_timestamp_valid=0 if ($weekday_in_month_count != 2);
      } elsif ($recurrence_parms{'weekday_of_month_type'} eq "only_fourth_week") {
        $recur_timestamp_valid=0 if ($weekday_in_month_count != 3);
      } elsif ($recurrence_parms{'weekday_of_month_type'} eq "only_fifth_week") {
        $recur_timestamp_valid=0 if ($weekday_in_month_count != 4);
      } elsif ($recurrence_parms{'weekday_of_month_type'} eq "only_last_week") {
        if ($last_week != 1) {
          $recur_timestamp_valid=0;
        } else {
          #$debug_info .= "timestamp: $recur_timestamp\n";
          #$debug_info .= "current month: $current_month\n";
          #$debug_info .= "lookahead timestamp: $recur_timestamp_next_week\n";
          #$debug_info .= "lookahead month: $recur_timestamp_next_week_array[4]\n";
        }
      }
    } elsif ($recurrence_parms{'recurrence_type'} eq "every_x_days") {
      #$debug_info .= $q->param('every_x_days');
      #$debug_info .= "\n";
      $recur_timestamp_valid=0 if (($recur_timestamp - $start_timestamp) % (86400 * $recurrence_parms{'every_x_days'}) !=0);
    } elsif ($recurrence_parms{'recurrence_type'} eq "every_x_weeks") {
      #$debug_info .= ($q->param('every_x_weeks')."\n");
      $recur_timestamp_valid=0 if (($recur_timestamp - $start_timestamp) % (86400 * 7 * $recurrence_parms{'every_x_weeks'}) !=0);
    }

    if ($recurrence_parms{'year_fit_type'} eq "custom_months") {
      my $month_valid=0;
      foreach $custom_month (@custom_months) {
        $month_valid=1 if ($custom_month == $recur_timestamp_array[4]);
      }
      $recur_timestamp_valid=0 if ($month_valid == 0);
    }

    if ($recur_timestamp_valid == 1) {
      push @recurring_events_array, $recur_timestamp+$timed_event_diff;
      my $real_year = $recur_timestamp_array[5]+1900;
    }

    #count how many of the event's weekdays we have come across in
    #each month.  This is for validating events that occur on the
    #second tuesday, fifth monday, etc.
    if ($recur_timestamp_array[6] == $timestamp_array[6]) {
      $weekday_in_month_count++;
    }

    #reset week_in_month count if this is the last week in the month
    $weekday_in_month_count=0 if ($last_week == 1 && $recur_timestamp_array[6] == $timestamp_array[6]);
  }

  if (scalar @recurring_events_array == 0) {
    $debug_info .= "Error!  No valid recurring event dates found!\n";
  }

  #$debug_info .= "returning ".(scalar @recurring_events_array)." recurring events\n";

  return \@recurring_events_array;
}


sub verify_date() {
  # $date is of the format similar to mm/dd/yy (or a permutation like dd/mm/yy)
  my ($date, $recurrence_parms_ref) = @_;
  my %recurrence_parms = %{$recurrence_parms_ref};

  my $results="";

  if ($date !~ /^(\w{1,2}\W\w{1,2}\W\w{2,4}|\w{1,2}\W\w{2,4}\W\w{1,2}|\w{2,4}\W\w{1,2}\W\w{1,2})$/) {
    $lang{date_verify_err0} =~ s/###date###/$date/;
    $lang{date_verify_err0} =~ s/###format###/$current_calendar{date_format}/;
    $results .= $lang{date_verify_err0}."\n";
  }

  if ($recurrence_parms{'recurrence_type'} eq "every_x_days") {
    if ($recurrence_parms{'every_x_days'} == 0) {
$results .= $lang{date_verify_err7}."\n"};
  } elsif ($recurrence_parms{'recurrence_type'} eq "every_x_weeks") {
    if ($recurrence_parms{'every_x_weeks'} == 0) {
$results .= $lang{date_verify_err8}."\n"};
  }



  if ($date eq "") {
    $results .= $lang{date_verify_err1}."\n";
  }

  my ($mon, $day, $year) = &format2mdy($date, $current_calendar{date_format});

  if ($mon < 1 || $mon > 12) {
    $lang{date_verify_err4} =~ s/###month###/$mon/;
    $results .= $lang{date_verify_err4}."\n";
  }

  $mon --;  # convert month to 0-11 format

  if ($day < 1 || $day > 31) {
    $lang{date_verify_err5} =~ s/###day###/$day/;
    $results .= $lang{date_verify_err5}."\n";
  }

  if ($year < 100) {$year+=2000;}

  if ($year < 1902 || $year > 2037) {
    $lang{date_verify_err6} =~ s/###year###/$year/;
    $results .= $lang{date_verify_err6}."\n";
  }


  return $results;
}

sub verify_time {
  my ($time) = @_;
  my $results="";
  if($options{twentyfour_hour_format}) {
     if ($time !~ /(\d+):(\d+)/) {
      $lang{time_verify_err0} =~ s/\{0\}/$time/;
      $results .= $lang{time_verify_err0};
    } else {
      my $hours = $1;
      my $minutes = $2;
      if ($hours > 23 || $hours < 0){
        $lang{time_verify_err1} =~ s/\{0\}/$hours/;
        $results .= $lang{time_verify_err1};
      }

      if ($minutes > 59 || $minutes < 0){
        $lang{time_verify_err2} =~ s/\{0\}/$minutes/;
       $results .= $lang{time_verify_err2};
      }
    }
  } else {

    if ($time !~ /(\d+):(\d+)\s*($lang{am}|$lang{pm})/) {
      $lang{time_verify_err0} =~ s/\{0\}/$time/;
      $results .= $lang{time_verify_err0};
    } else {
      my $hours = $1;
      my $minutes = $2;
      my $ampm = $3;

      if ($hours > 12 || $hours < 0) {
        $lang{time_verify_err1} =~ s/\{0\}/$hours/;
        $results .= $lang{time_verify_err1};
      }

      if ($minutes > 60 || $minutes < 0) {
        $lang{time_verify_err2} =~ s/\{0\}/$minutes/;
        $results .= $lang{time_verify_err2};
      }

    }
  }
  return $results;
}



sub preview_date {
  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<link rel="stylesheet" href="$css_path" type="text/css" media=screen>
<title>$lang{date_preview_title}</title>
</head>
<body>

<div class="info_box">
<span class="cal_title">
$lang{date_preview_title}
</span>
p1

  my %recurrence_parms;
  $recurrence_parms{'recurrence_type'} = $q->param('recurrence_type');
  $recurrence_parms{'weekday_of_month_type'} = $q->param('weekday_of_month_type');
  $recurrence_parms{'every_x_days'} = $q->param('every_x_days');
  $recurrence_parms{'every_x_weeks'} = $q->param('every_x_weeks');
  $recurrence_parms{'year_fit_type'} = $q->param('year_fit_type');
  $recurrence_parms{'recur_end_date'} = $q->param('recur_end_date');
  $recurrence_parms{'recur_end_timestamp'} = 0;

  my @custom_months = $q->param('custom_months');

  #my @custom_months = split(/\D+/, $q->param('custom_months'));
  #$debug_info .= (scalar @custom_months)." custom months\n";
  #$debug_info .= "q->param('custom_months'): ".$q->param('custom_months')."\n";

  $recurrence_parms{'custom_months'} = \@custom_months;

  my $recurring_event = $q->param('recurring_event');
  my $event_start_date = $q->param('evt_start_date');
  my $recur_end_date = $q->param('recur_end_date');
  my $event_days = $q->param('evt_days');
  my $event_start_time = $q->param('evt_start_time');
  my $event_end_time = $q->param('evt_end_time');
  my $all_day_event = $q->param('all_day_event');

  #my $event_cal_id = $current_cal_id;
  #my %current_calendar = %{$calendars{$event_cal_id}};

  my $date_valid = &verify_date($event_start_date);

  if ($event_days eq "") {
    $date_valid = $lang{date_verify_err2};
  }
  if ($event_days =~ m/\D/ || $event_days <= 0) {
    my $temp = $lang{date_verify_err3};
    $temp =~ s/\$1/$event_days/;
    $date_valid = $temp;
  }


  if ($recurring_event) {
    my $temp .= &verify_date($recurrence_parms{'recur_end_date'}, \%recurrence_parms);
    if ($temp ne "") {
      $date_valid .= "\n$lang{date_verify_for_recurring_end_date}\n<p style=\"margin:0;padding-left:1em;\">$temp</p>";
    }
  }

  if ($date_valid eq "") {
    my ($start_mon, $start_mday, $start_year) = &format2mdy($event_start_date, $current_calendar{date_format});
    my ($recur_end_mon, $recur_end_mday, $recur_end_year) = &format2mdy($recurrence_parms{'recur_end_date'}, $current_calendar{date_format});
    $start_mon--;
    $recur_end_mon--;

    #calculate start timestamp
    #$event_start_timestamp = timegm(0,0,0,$start_mday,$start_mon,$start_year);

    #$debug_info .= "(preview_date) start_mday: $start_mday\n";
    #$debug_info .= "(preview_date) start_mon: $start_mon\n";
    #$debug_info .= "(preview_date) start_year: $start_year\n";
    #$debug_info .= "(preview_date) event_days: $event_days\n";
    #$debug_info .= "(preview_date) event_start_time: $event_start_time\n";
    #$debug_info .= "(preview_date) event_end_time: $event_end_time\n";
    #$debug_info .= "(preview_date) all_day_event: $all_day_event\n";

    my ($event_start_timestamp, $event_end_timestamp) = &timestamp_from_datetime($start_mday,$start_mon,$start_year,$event_days,$event_start_time,$event_end_time,$all_day_event);


    @timestamp_array = gmtime $event_start_timestamp;
    my $real_year = $timestamp_array[5]+1900;

    if ($recurring_event == 1) {
      #calculate end timestamp
      $recurrence_parms{'recur_end_timestamp'} = timegm(0,0,0,$recur_end_mday,$recur_end_mon,$recur_end_year);

      $html_output .= <<p1;
<p>$lang{date_preview_recurring_event_falls_on}</p>
p1

      my @recurring_events_array = @{&calculate_recurring_events($event_start_timestamp, \%recurrence_parms)};
      foreach $recurring_event_timestamp (@recurring_events_array) {
        $timestamp1 = $recurring_event_timestamp;
        $timestamp2 = $recurring_event_timestamp + 86400 * ($event_days-1);
        if ($timestamp1 == $timestamp2) {$timestamp2++;}

        $date_range = &nice_date_range_format($timestamp1, $timestamp2, "-");
        $html_output .= <<p1;
<p style="font-weight:bold;">$date_range</p>
p1
      }


    } else {
      my $date = "";
      $timestamp1 = $event_start_timestamp;
      $timestamp2 = $event_start_timestamp + 86400 * ($event_days-1);
      if ($timestamp1 == $timestamp2) {$timestamp2++;}
      $date_range = &nice_date_range_format($timestamp1, $timestamp2, "-");

        $html_output .= <<p1;
<p>$lang{date_preview_this_event_falls_on}</p>
<p style="font-weight:bold;">
$date_range
</p>
p1
    }

  } else {
    $date_valid =~ s/\n/<br\/>/g;
    $html_output .= "<p>$date_valid</p>";
  }



  $html_output .=<<p1;
</div>
p1

  #$html_output .="$debug_info";
  $debug_info =~ s/\n/<br\/>/g;

  $html_output .=<<p1;
$debug_info
</body>
</html>
p1

print $html_output;
}  # end preview date subroutine



sub validate_event {
  my $results = "";
  my $event_title = $q->param('evt_title');
  my $all_day_event = $q->param('all_day_event');
  my $event_start_date = $q->param('evt_start_date');
  my $event_start_time = $q->param('evt_start_time');
  my $event_end_time = $q->param('evt_end_time');
  my $event_days = $q->param('evt_days');

  my $date_valid = &verify_date($event_start_date);
  
  if ($date_valid eq "") {
    if ($all_day_event ne "1") {
      my $verify_time_results = &verify_time($event_start_time);
      if ($verify_time_results ne "") {
        my @sub_results = split("\n", $verify_time_results);
        foreach $sub_result (@sub_results) {
          $date_valid .= "[error]$lang{update_event_err14} $sub_result<br/>";
        }
      }
 
      my $verify_time_results = &verify_time($event_end_time);
      if ($verify_time_results ne "") {
        my @sub_results = split("\n", $verify_time_results);
        foreach $sub_result (@sub_results) {
          $date_valid .= "[error]$lang{update_event_err15} $sub_result<br/>";
        }
    }
    }
  }


  if ($event_title eq "") {
    $date_valid = $lang{update_event_err4};
  }

  if ($event_days eq "") {
    $date_valid = $lang{date_verify_err2};
  }

  if ($event_days =~ m/\D/ || $event_days <= 0) {
    my $temp = $lang{date_verify_err3};
    $temp =~ s/\$1/$event_days/;
    $date_valid = $temp;
  }

  if ($date_valid eq "") {
    $results .= <<p1;
success = true;
messages = '';
p1
  } else {
    $date_valid =~ s/\//\\\//g;
    $date_valid =~ s/\n/<br\/>/g;
    $date_valid =~ s/"/\\"/g;
    $date_valid =~ s/'/\\'/g;

    $results .= <<p1;
success = false;
messages = '$date_valid';
p1

  }

  $debug_info =~ s/\//\\\//g;
  $debug_info =~ s/\n/<br\/>/g;
  $debug_info =~ s/"/\\"/g;
  $debug_info =~ s/'/\\'/g;
  $results =~ s/###debug_info###/$debug_info/;

  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n

$results
p1

}












sub preview_event {

  $event_details_template =~ s/###export event link###/$lang{event_details_export_disable}/g;
  $event_details_template =~ s/###edit event link###/$lang{event_details_edit_disable}/g;
  $event_details_template =~ s/###email reminder link###/$lang{event_email_reminder_disable}/g;

  my $event_info = &generate_event_details({title => $q->param('evt_title'),
                                            details => $q->param('evt_details'),
                                            cal_id => $current_cal_id,
                                            icon => $q->param('evt_icon'),
                                            bgcolor => $q->param('evt_bgcolor'),
                                            start => "",
                                            end => "",
                                            unit_number => $q->param('unit_number')}, 1);

  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<link rel="stylesheet" href="$css_path" type="text/css" media=screen>
<title>$lang{event_preview_title}</title>
</head>
<body>
<span class="cal_title">
$lang{event_preview_title}
</span>
$event_info
$debug_info
</body>
</html>
p1

  print $html_output;
}  # preview_event

sub view_event {
  #$debug_info .= "(view_event) event $current_event{id} start: $current_event{start} \n" if ($current_event{id} eq "1815");
  my %current_event = %{$events{$current_event_id}};

  my $event_info = &generate_event_details(\%current_event);
  $debug_info =~ s/\n/<br\/>\n/g;

  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<link rel="stylesheet" href="$css_path" type="text/css" media=screen>
<script type="text/javascript" src="$theme_url/lpd.js"></script>
<script type="text/javascript" src="$theme_url/plans.js"></script>
<script type="text/javascript" src="$theme_url/plans_lang.js"></script>
<title>$current_event{title}</title>
</head>
<body onResize="do_onresize()">

$event_info
$debug_info
</body>
</html>
p1

  print $html_output;
}  # view_event


sub view_pending_event {
  my ($pending_event_ref) = @_;
  my %pending_event = %{$pending_event_ref};

  $event_details_template =~ s/###export event link###/$lang{event_details_export_disable}/g;
  $event_details_template =~ s/###edit event link###/$lang{event_details_edit_disable}/g;
  $event_details_template =~ s/###email reminder link###/$lang{event_email_reminder_disable}/g;


  my $event_info = &generate_event_details(\%pending_event);
  $debug_info =~ s/\n/<br\/>\n/g;

  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<link rel="stylesheet" href="$css_path" type="text/css" media=screen>
<script type="text/javascript" src="$theme_url/lpd.js"></script>
<script type="text/javascript" src="$theme_url/plans.js"></script>
<script type="text/javascript" src="$theme_url/plans_lang.js"></script>

<title>$current_event{title}</title>
</head>
<body onResize="do_onresize()">

$event_info
$debug_info
</body>
</html>
p1

  print $html_output;
}  # view_pending_event


sub email_reminder_prompt {
  my %current_event = %{$events{$current_event_id}};
  my %previous_current_calendar = %current_calendar;
  %current_calendar = %{$calendars{$current_event{cal_ids}[0]}};
  $date_string = &nice_date_range_format($current_event{start}, $current_event{end}, " - ");
  %current_calendar = %previous_current_calendar;


  my $title = "<title>$current_event{title}$lang{email_reminder_title}</title>";

  my $results .=<<p1;
<script type="text/javascript" ><!--
var clicked = false;

function address_focus() {
  if (!clicked) {
    document.email_reminder_submit.email_address.value = "";
    clicked=1;
  }
}
</script>

<body>
<div class="event_details" style="background-color:$current_event{bgcolor};text-align:left;">
<p class="title">
$current_event{title}
</p><p>
$lang{email_reminder_text1}
<br/><span class="date">$date_string</span>
</p><p>
<br/><br/>$lang{email_reminder_text2}
</p>

<form name="email_reminder_submit" action="$script_url/$name" method="POST">
<input type="hidden" name="evt_id" value="$current_event{id}"/>
<input type="hidden" name="email_reminder_confirm" value="1"/>
<input name="email_address" style="width:90%;" value="your_email\@address.com"/ onfocus="address_focus()">
<br/><br/>
<select name="reminder_time">
<option value="604800, $lang{email_reminder_option1}">$lang{email_reminder_option1}</option>
<option value="172800, $lang{email_reminder_option2}">$lang{email_reminder_option2}</option>
<option value="86400, $lang{email_reminder_option3}">$lang{email_reminder_option3}</option>
<option value="3600, $lang{email_reminder_option4}">$lang{email_reminder_option4}</option>
<option value="1800, $lang{email_reminder_option5}">$lang{email_reminder_option5}</option>
<option value="900, $lang{email_reminder_option6}">$lang{email_reminder_option6}</option>
</select>
$lang{email_reminder_text3}
<br/><br/>
$lang{email_reminder_text7}
<textarea name="extra_text" style="width:90%" rows="4">
</textarea>
<br/><br/>
<input type="checkbox" name="send_test_now" value="1"> $lang{email_reminder_text4}
<br/><br/>
p1

if ($current_event{series_id} ne "") {
  $results .=<<p1;
<input type="checkbox" name="all_in_series" value="1"/> $lang{email_reminder_text6}
<br/><br/>
p1
}
  $results .=<<p1;
<input type="submit" value="$lang{email_reminder_text5}"/>
</form>
</div>
</body>
p1

  $template_html =~ s/<title>.*<\/title>/$title/s;
  $template_html =~ s/<body.*>.*<\/body>/$results/s;
  $template_html =~ s/###css file###/$css_path/g;

  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
$template_html
p1
}  # email_reminder_prompt


sub email_reminder_confirm {
  my %current_event = %{$events{$current_event_id}};

  my $reminder_results = "";
  my $to_address = $q->param('email_address');
  my $extra_text = $q->param('extra_text');
  $to_address =~ s/\s//g;
  $to_address =~ s/;/,/g;
  chomp $to_address;

  my ($reminder_seconds, $reminder_time) = split(/, ?/,$q->param('reminder_time'));
  $reminder_time = lc $reminder_time;

  my $email_valid = &validate_emails($to_address);

  if ($email_valid ne "") {
    $reminder_results = $lang{email_reminder_invalid_address};
    $reminder_results =~ s/###address###/$email_valid/g;
  } else {
    my @event_reminder_ids = ($current_event{id});
    my @future_event_reminder_ids;
    if ($q->param('all_in_series') ne "") {
      @event_reminder_ids = &get_events_in_series($current_event{series_id});
      &normalize_timezone();
    }

    foreach $event_reminder_id (@event_reminder_ids) {
      if ($events{$event_reminder_id}{start} > $rightnow) {
        push @future_event_reminder_ids, $event_reminder_id;
      }
    }

    foreach $event_reminder_id (@future_event_reminder_ids) {
      # assemble email reminder xml
      my $reminder_xml = "";
      $reminder_xml .= &xml_store($event_reminder_id, "evt_id").
                     &xml_store($reminder_seconds, "before").
                     &xml_store($to_address, "email_address").
                     &xml_store($extra_text, "extra_text").
                     &xml_store("$script_url/$name", "script_url").
                     &xml_store($rightnow, "timestamp");
      $reminder_xml = "<email_reminder>$reminder_xml</email_reminder>\n";

      # write email reminder to file
      open (FH, ">>$options{email_reminders_datafile}") || ($debug_info .="<br/>Unable to open email reminders data file $options{email_reminders_datafile} for writing<br/>");
      print FH $reminder_xml;
      close FH;
    }

    my $test_reminder_results = "";
    if ($q->param('send_test_now') == 1) {
      my $reminder_text = $lang{email_reminder_test_text};
      $reminder_text =~ s/###reminder_time###/$reminder_time/g;

      my $date_string = &nice_date_range_format($current_event{start}, $current_event{end}, " - ");

      my $event_time = "";
      if ($current_event{all_day_event} ne "1") {
        $event_time = &nice_time_range_format($current_event{start}, $current_event{end});
      }
      $reminder_text =~ s/###time###/$event_time/g;
      $reminder_text =~ s/###title###/$current_event{title}/g;
      $reminder_text =~ s/###date###/$date_string/g;
      $reminder_text =~ s/###extra text###/$extra_text/g;
      $reminder_text =~ s/###details###/$current_event{details}/g;
      $reminder_text =~ s/###link###/$script_url\/$name?view_event=1&evt_id=$current_event{id}/g;

      #$debug_info .= "$reminder_text\n";

      $test_reminder_results = &send_email_reminder(\%current_event, $to_address, $reminder_text);
      if ($test_reminder_results eq "1") {
        $test_reminder_results = $lang{email_reminder_test_success};
        $test_reminder_results =~ s/###address###/$to_address/g;
      } else {
        $test_reminder_results = $lang{email_reminder_test_fail};
        $test_reminder_results =~ s/###results###/$test_reminder_results/g;
      }
    }

    $lang{email_reminder_results1} =~ s/###address###/$to_address/g;
    $lang{email_reminder_results1} =~ s/###reminder time###/$reminder_time/g;

    if ($q->param('send_test_now') == 1) {
$lang{email_reminder_results1} .= $lang{email_reminder_results3}} else {
$lang{email_reminder_results1} .= $lang{email_reminder_results2}}


    $reminder_results = <<p1;
$lang{email_reminder_results1}
<br/><br/>
$test_reminder_results
p1
  }

  $debug_info =~ s/\n/<br\/>\n/g;

  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<link rel="stylesheet" href="$css_path" type="text/css" media=screen>
<title>$current_event{title}$lang{email_reminder_title}</title>
</head>

<body>
<div class="event_details" style="background-color:$current_event{bgcolor};text-align:left;">
<p style="margin-top:20px;margin-bottom:20px;">
$reminder_results
</p>
</div>
$debug_info
</body>
</html>
p1

print $html_output;
}  # email_reminder_confirm

sub detect_remote_calendars() {
  my $remote_calendar_url = $q->param('remote_calendar_url');
  $remote_calendar_url =~ s/\?.+//;
  #$debug_info .= "url: $remote_calendar_url\n";

  $remote_calendar_url .= "/" if ($remote_calendar_url !~ /\.cgi$/);
  $remote_calendar_base_url = $remote_calendar_url;
  $remote_calendar_url .= "?remote_calendar_request=1&get_public_calendars=1";
  #$debug_info .= "remote_calendar_url: $remote_calendar_url\n";

  my $xml_results = &get_remote_file($remote_calendar_url);

  #$debug_info .= "xml results: ".&xml2html($xml_results)."\n";
  #$results =~ s/>/&gt;/g;
  #$results =~ s/</&lt;/g;

  my %remote_calendars = %{&xml2hash($xml_results)};

  my @public_calendars;

  if (ref $remote_calendars{'xml'}{public_calendar} eq "ARRAY") {
    #$debug_info .= "found remote calendars!\n";
    @public_calendars = @{$remote_calendars{'xml'}{public_calendar}};
  } else {
    #$debug_info .= "found remote calendar: $remote_calendars{'xml'}{public_calendar})\n";
    #$debug_info .= "found remote calendar: ".&xml2html($remote_calendars{'xml'}{public_calendar})."\n";
    push @public_calendars, $remote_calendars{'xml'}{public_calendar};
  }

      $remote_calendar_info .= <<p1;
<p style="clear:both;">
$lang{detect_remote_calendars1} <a target="_blank" href="$remote_calendar_base_url">$remote_calendar_base_url</a>:
</p>
<div style="float:left;width:95%;border:solid 1px #000;">
<form name="cal_merge_form">
p1


  my $index = 0;
  foreach $temp (@public_calendars) {
    my %public_calendar = %{$temp};
    my $list_class="list_odd";

    my $merge_xml = <<p1;
<remote_calendar>
<type>plans</type><version>$remote_calendars{'xml'}{'plans_version'}</version>
<url>$remote_calendar_base_url</url>
<remote_id>$public_calendar{id}</remote_id>
<password>###password###</password>
</remote_calendar>
p1

    #$merge_xml =~ s/\//\\\//g;
    $merge_xml =~ s/\n//g;
    $merge_xml =~ s/"/\\"/g;


    if ($index%2 == 0) {
$list_class="list_even"}

    $remote_calendar_info .= <<p1;
<div class="$list_class" style="float:left;clear:left;width:100%;">
p1
    #$remote_calendar_info .= "public calendar: ".$remote_calendars{'xml'}{public_calendar}."<br/>";
    $remote_calendar_info .= <<p1;
<div style="float:left;font-weight:bold;padding:3px;white-space:nowrap;">$public_calendar{title}</div>
p1

    $remote_calendar_info .= <<p1;
<div style="float:left;padding:3px;white-space:nowrap;">$lang{detect_remote_calendars2}<input type="checkbox" id="remote_cal_$index" name="remote_cal_$index" value = "$merge_xml">
p1
    if ($public_calendar{requires_password} ne "") {
      $remote_calendar_info .= <<p1;
<span style="margin-left:1em;white-space:nowrap;">($lang{detect_remote_calendars3}): <input id="password_$index" name="password_$index" style="width:6em;"></span>
p1
    }
    $remote_calendar_info .= <<p1;
</div>
p1


    $remote_calendar_info .= <<p1;
</div>
p1
    $index++;
  }
  $remote_calendar_info .= <<p1;
</form>
</div>
p1

  if ($index > 0) {
    $remote_calendar_info .= <<p1;
<p style="clear:both;padding-top:1em;"><a href="javascript:merge_selected()">$lang{detect_remote_calendars4}</a></p>
<br/><br/>
p1
  } else {
    $remote_calendar_info .= <<p1;
<p style="clear:both;padding-top:1em;">$lang{detect_remote_calendars5}</p>
<br/><br/>
p1
  }
#<br style="clear:both;"/>
#<br style="clear:both;"/>


  #my $temp_xml_results = $xml_results;
  #$temp_xml_results =~ s/>/&gt;/g;
  #$temp_xml_results =~ s/</&lt;/g;
  #$debug_info .= $temp_xml_results;


  my $popup_javascript_info = "";

    $popup_javascript_info .=<<p1;
<script type="text/javascript" ><!--
p1

  if ($browser_type eq "IE") {
    $popup_javascript_info .=<<p1;
function do_onresize() {
  opener.info_window_width = document.body.clientWidth;
  opener.info_window_height = document.body.clientHeight;
}
p1
  } else {
    $popup_javascript_info .=<<p1;
function do_onresize() {
  opener.info_window_width = this.outerWidth;
  opener.info_window_height = this.outerHeight;
}
p1
  }

    $popup_javascript_info .=<<p1;
function opener_test() {
  //alert("about to test opener " + opener.info_window_width);
  //opener.test();
}

function merge_selected() {
  var l1=0;
  var merge_xml="";
  while (document.getElementById("remote_cal_"+l1)) {
    var el = document.getElementById("remote_cal_"+l1);

    if (el.checked)  {
      var temp = "";
      if (document.getElementById("password_"+l1))
        temp = el.value.replace(/###password###/, document.getElementById("password_"+l1).value); else
        temp = el.value.replace(/###password###/, "");
      merge_xml += temp;
    }

    l1++;
  }
  if (merge_xml != "")
    opener.set_merge_xml("<remote_calendars>"+merge_xml+"</remote_calendars>");

  window.close();
}

//-->
</script>
p1


  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=$lang{charset}\n

p1

  $debug_info =~ s/\n/<br\/>\n/g;

  $html_output .=<<p1;
<html>
<head>
<title>$lang{get_remote_calendars}</title>
<link rel="stylesheet" href="$css_path" type="text/css" media="screen"/>
</head>
<body onResize="javascript:do_onresize();">
$popup_javascript_info
<div class="info_box" style="padding:5px;"><br/>
p1

#

  $html_output .=<<p1;
$remote_calendar_info
<br/><br/>
$debug_info
</div>
</body></html>
p1
  print $html_output;

}


sub remote_calendar_request() {
  my $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/xml; charset=$lang{charset}\n

p1
  my $results = "";
  my $current_cal_ids_string = $q->param('cal_id');

  $results .=<<p1;
<plans_version>$plans_version</plans_version>
p1

  #$debug_info .= "remote calendar request!";

  # if the client requests a list of all calendars that are publically share-able.
  if ($q->param('get_public_calendars') eq "1") {
    foreach $cal_id (keys %calendars) {
      if ($calendars{$cal_id}{allow_remote_calendar_requests}) {
        my $temp=$calendars{$cal_id}{remote_calendar_requests_require_password};
        $results .=<<p1;
<public_calendar><id>$cal_id</id><title>$calendars{$cal_id}{title}</title><requires_password>$temp</requires_password></public_calendar>
p1
      }
    }
  } else  { # return xml data for the events.

    my @current_cal_ids = ();
    my @temp = split (",",$current_cal_ids_string);

    my $cal_id_valid=1;

    foreach $cal_id (@temp) {
      if ($cal_id !~ /\D/) {
        push @current_cal_ids, $cal_id;
      } else {
        $cal_id_valid=0;
        $results .= "<error>Invalid calendar ID: $cal_id</error>";
        last;
      }
    }
    if ($cal_id_valid) {
      foreach $current_cal_id (@current_cal_ids) {
          $results .=<<p1;
<calendar><id>$current_cal_id</id><title>$calendars{$current_cal_id}{title}</title><gmtime_diff>$calendars{$current_cal_id}{gmtime_diff}</gmtime_diff></calendar>
p1
      }

      foreach $current_cal_id (@current_cal_ids) {
        foreach $event_id (keys %events) {

          my $event_in_current_calendar = 0;

          foreach $temp_cal_id (@{$events{$event_id}{cal_ids}}) {
            if ($temp_cal_id eq $current_cal_id) {
              $event_in_current_calendar = 1;
              last;
            }
          }

          next if ($event_in_current_calendar == 0);

          my $xml_data = &event2xml($events{$event_id});
          $results .=<<p1;
$xml_data
p1
        }
      }
    }
  }

  if ($debug_info ne "") {
$results .= "<debug_info>$debug_info</debug_info>";}

  $html_output .= "<xml>$results</xml>";

  print $html_output;

}




#******************* the following subroutines don't display any HTML **********




sub diagnostic_info() {
  my $results = "";

  $results .= <<p1;
<b>Script Name:</b>$name<br/>
<br/>
p1

 if ($options{email_mode} && !$writable{email_reminders_datafile}) {
   $results .=<<p1;
<b>Warning:</b> The email reminders data file: $options{email_reminders_datafile} is not writable.  This will
cause some email functions to be disabled or not work correctly.<br/>
p1
 }
 if ($options{data_storage_mode} == 0 && !$writable{calendars_file}) {
   $results .=<<p1;
<b>Warning:</b> The calendars data file: $options{calendars_file} is not writable.  The add/edit calendars tab won't appear
unless this file is writable.<br/>
p1
 }
 if ($options{data_storage_mode} == 0 && !$writable{pending_actions_file}) {
   $results .=<<p1;
<b>Warning:</b> The pending actions data file: $options{pending_actions_file} is not writable.  The add/edit calendars tab won't appear
unless this file is writable.<br/>
p1
 }
 if ($options{data_storage_mode} == 0 && !$writable{events_file}) {
   $results .=<<p1;
<b>Warning:</b> The events data file: $options{events_file} is not writable.  The add/edit events tab won't appear
unless this file is writable.<br/>
p1
 }

  my $cwd = `pwd`;

  $results .=<<p1;
<b>Plans version:</b> $plans_version<br/>
<b>Perl version:</b> $perl_version<br/>
<b>script name:</b> $name<br/>
<b>script file path:</b> <span style="color:#00f;">$cwd</span><br/>
<b>script url path:</b> $script_url<br/>
<br/>
<b>Theme url:</b> $theme_url<br/>
<b>graphics url:</b> $graphics_url<br/>
<b>icons url:</b> $icons_url<br/>
<br/>
<b>Options:</b><br/>
p1

 # blank out options that we don't want public
 delete $options{db_name};
 delete $options{db_hostname};
 delete $options{db_username};
 delete $options{db_password_file};
 delete $options{mysql_password};
 delete $options{salt};

  foreach $option (keys %options) {
    $results .=<<p1;
<b>$option:</b> $options{$option}<br/>
p1
  }
  return $results;

}       # end diagnostic subroutine


sub assemble_icon_menus() {
  # this function extracts a data structure for the icon menus from the xml definition
  my ($data)= @_;

  # first, get the menuitems
  my @new_menuitems=();

  my @menuitems = &xml_extract($data, "menuitem", 0);
  if (scalar @menuitems == 0) {
    $debug_info .= "Warning.  There's a menu with no menuitems.  This may be caused by an older version of Perl ( < 5.6).\n";
    $debug_info .= "$data";
  } else {
    foreach my $menuitem (@menuitems) {
      #$debug_info .= "menuitem: $menuitem->{data} ($menuitem->{position})<br/>";
      my $icon_name = $menuitem->{attributes}{"value"};
      my $icon_description = $menuitem->{data};
      $icon_description = &encode($icon_description);
      $new_menuitems[$menuitem->{position}] = [$icon_name,$icon_description];
      #$new_menuitems[$menuitem->{position}] = "name,description";
    }
  }

  # then get the submenus
  my @submenus = &xml_extract($data, "menu", 0);
  foreach $submenu (@submenus) {
    my $temp = $submenu->{data};
    my $temp2 = $submenu->{attributes}{name};
    my @submenuitems = assemble_icon_menus($temp);
    #$debug_info .= "submenu: $temp2 ($submenu->{position})<br/>";
    $new_menuitems[$submenu->{position}] = [$temp2, \@submenuitems];
  }

  return @new_menuitems;
}   #******************** end assemble_icon_menus **********************


sub generate_flat_icon_menus {
  my ($icons_list, $selected_icon) = @_;
  my $return_text="";
  #$debug_info .= "selected icon: $selected_icon<br/>";

  my $indent = " ";
  for ($l1=0;$l1<$index_number;$l1++) {
    $indent .= "  ";
  }

  foreach $icon_ref (@{$icons_list}) {
    my $identifier = @{$icon_ref}[1];

    if ($identifier =~ /ARRAY/)   { # if it's a submenu
     $icon_menu_index_number++;
     my $submenu_name = @{$icon_ref}[0];

     #$debug_info .= "submenu $submenu_name<br/>";

     $return_text .= <<p1;
<optgroup label="$submenu_name">
p1
     $return_text .= &generate_flat_icon_menus(@{$icon_ref}[1], $selected_icon);
     $return_text .= <<p1;
</optgroup>
p1
    } else  { # if it's a menu item
      my $icon_filename = @{$icon_ref}[0];
      my $icon_name = @{$icon_ref}[1];

      $icon_name = &decode($icon_name);
      #$debug_info .= "icon name: $icon_name <br/>";
      #$debug_info .= "icon filename: $icon_filename <br/>";
      #$debug_info .= "<br/>";

      if ($icon_filename eq $selected_icon) {
      $return_text .= <<p1;
<option value = "$icon_filename" selected>$icon_name</option>
p1
      } else {
      $return_text .= <<p1;
<option value = "$icon_filename">$icon_name</option>
p1
      }
    }
  }
  return $return_text;

}   #******************** end generate_flat_icon_menus **********************


sub get_upcoming_events() {
  my $days_before = $q->param('days_before')+0;
  my $days_after = $q->param('days_after')+0;
  my $background_calendars_mode = $q->param('background_calendars_mode');
  my $upcoming_events_id = $q->param('upcoming_events_id');
  my $results = "";

  my $start = $rightnow - $days_before*86400;
  my $end = $rightnow + $days_after*86400;
  #$debug_info .= "start: $start\n";
  #$debug_info .= "end: $end\n";

  #$debug_info .= (scalar keys %events)." events\n";
  # clear events
  %events = ();
  #$debug_info .= (scalar keys %events)." events\n";

  my @cal_ids = split(',',$q->param('cal_ids'));
  #$debug_info .= "cal_ids[0]: $cal_ids[0]\n";
  #$debug_info .= "cal_ids[1]: $cal_ids[1]\n";


  #&load_events("all");

  #$debug_info .= (scalar keys %events)." events\n";


  #$results .= &common_javascript();
  my $date_format = lc $current_calendar{date_format};
  $results .= "date_format = '$date_format';\n";

  my %all_calendar_ids;

  foreach $calendar_id (@cal_ids) {
    next if ($calendars{$calendar_id}{id} eq "");

    foreach $local_background_calendar_id (keys %{$calendars{$calendar_id}{local_background_calendars}}) {
      $all_calendar_ids{$local_background_calendar_id} = 1;
    }
    $all_calendar_ids{$calendar_id} = 1;
  }
  
  foreach $calendar_id (keys %all_calendar_ids) {
    $results .= "calendars['$calendar_id'] = new Calendar({".&calendar2javascript($calendars{$calendar_id})."});\n";
  }

  my @temp;
  if ($background_calendars_mode ne "none") {
    @temp = keys %all_calendar_ids;
  } else {
    @temp = @cal_ids;
  }
  
  &load_events($start, $end, \@temp);
  &normalize_timezone;

  $results .= "all_calendars = new Array('".(join "','", keys %all_calendar_ids)."');\n";

  foreach $event_id (keys %events) {
    $results .= "upcoming_events['$event_id'] = new Event({".&event2javascript($events{$event_id})."});\n";
    $results .= "upcoming_events_order.push('$event_id'); \n";
  }

  if ($debug_info ne "") {
    $debug_info = &javascript_cleanup($debug_info);
    #$debug_info = "debug_info = '$debug_info';\n";
    $results .= "if ($upcoming_events_id.debug) debug('$debug_info');\n";
  }

  $results .= "$upcoming_events_id.plans_theme_url='$theme_url';\n";
  $results .= "$upcoming_events_id.show();\n";

  my $nice_expires = $rightnow + $options{upcoming_events_cache_seconds};
  $nice_expires = uc &formatted_time($nice_expires, "mn/md/yy hh:mm:ss AMPM");

  my $cache_line = "Cache-control: no-cache,no-store,private";
  $cache_line = "Cache-Control: max-age=$options{upcoming_events_cache_seconds};\nExpires: $nice_expires;" if ($options{upcoming_events_cache_seconds} > 0);


  my $html_output .=<<p1;
$cache_line
Content-Type: text/html; charset=$lang{charset}\n
$results
p1

  print $html_output;
}







sub export_calendar_link() {
  my $results = "";

  $results .=<<p1;
<a href="javascript:document.export_cal_form.submit();">$lang{export}</a> $lang{these_events_to}
<form name="export_cal_form" target="_blank" action="$script_url/$name" method="POST">
<input type="hidden" name="export_calendar" value=1>

<select name="export_type">
<option value="ascii_text">$lang{text_option}
<option value="csv_file">$lang{csv_file}
<option value="csv_file_palm">$lang{csv_file_palm}
<option value="icalendar">$lang{icalendar_option}
<option value="vcalendar">$lang{vcalendar_option}
</select>
</form>
p1

}




sub add_edit_user() {
  my $results = "";
  my $status = 1;

  my $id = $q->param('user_id');
  my $name = $q->param('name');
  my $notes = $q->param('notes');
  my $password = $q->param('password');
  my $new_password = $q->param('new_password');
  my $repeat_password = $q->param('repeat_password');
  my $delete_flag = $q->param('delete');


  #$results .= "add/edit user!";
  #$debug_info .= "cal_password: ".$q->param('cal_password')."\n";
  #$debug_info .= "logged_in_as_root: $logged_in_as_root\n";
  #$debug_info .= "logged_in_as_current_cal_admin: $logged_in_as_current_cal_admin\n";

  $results .= "success = false;";

  my $login_valid = 0;
  # validate password
  if ($logged_in_as_root) { # plans 'root' password
$login_valid = 1;} elsif ($logged_in_as_current_cal_admin) { # current calendar admin
$login_valid = 1;}

  #$debug_info .= "login_valid: $login_valid\n";

  if (!$login_valid) {
    if ($delete_flag eq "1") {
$results .= "messages = '$lang{user_not_deleted}';";} else {
$results .= "messages = '$lang{user_not_added}';";}
  } else {
    # delete?
    if ($delete_flag eq "1") {
      my $temp = $lang{user_deleted};
      $temp =~ s/\$1/$users{$id}{name}/;
      $results .= "messages = '$temps';";

      delete $user{calendars}{$calendar_id};

      #$debug_info .= "user $user_id, ".(scalar keys %{$user{calendars}})." calendars\n";

      if (scalar keys %{$user{calendars}} == 0) {
        delete $users{$user_id};
      }
      &update_user($user_id);

      &delete_user($id);
      $results .= "success = true;";
      $results .= "users = new Array();";
      $results .= &generate_users_javascript();
    } else {
      # add or update?
      if ($id eq "") { # add

        $password = crypt($password, $options{salt});

        my $new_id = $max_user_id+1;
        my %cal_refs;
        $cal_refs{$current_cal_id}{edit_events} = 1;

        $users{$new_id} = {id => $new_id,
                           name => $name,
                           notes => $notes,
                           password => $password,
                           calendars => \%cal_refs
                          };
        &add_user($new_id);

        $results .= "success = true;";
        $results .= "users = new Array();";
        $results .= &generate_users_javascript();

        $results .= "messages += '$lang{user_added}';";
      } else { # update
        $password = crypt($password, $options{salt});

        my %cal_refs;
        $cal_refs{$current_cal_id}{edit_events} = 1;

        $users{$id} = {id => $id,
                       name => $name,
                       notes => $notes,
                       password => $password,
                       calendars => \%cal_refs
                       };
        &update_user($id);

        $results .= "success = true;";
        $results .= "users = new Array();";
        $results .= &generate_users_javascript();

        $results .= "messages += '$lang{user_updated}';";
      }
    }
  }
  $results .= "messages += '###debug_info###';";


  $debug_info =~ s/\//\\\//g;
  $debug_info =~ s/\n/<br\/>/g;
  $debug_info =~ s/"/\\"/g;
  $debug_info =~ s/'/\\'/g;
  $results =~ s/###debug_info###/$debug_info/;

  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n
$results
p1

  exit(0);
}

sub add_new_ical {
  my $ical_url = &decode($q->param('ical_url'));
  my $results = "";
  
  if (!$logged_in_as_root) {
    $results .= "messages = 'You must be logged in to add an iCal!';";
    $results .= "var successful = false;";
  } else {
    # try getting the URL
    my $url_results = &get_remote_file($ical_url);
    $debug_info .= $url_results;

    if ($url_results eq "404 not found!" || $url_results =~ /cannot connect/i) {
      $results .= "messages = 'iCal calendar <b>not</b> added!  (invalid url)';";
      $results .= "var successful = false;";
    } else {
      my %new_calendar = &deep_copy(\%default_cal);
      my $new_cal_id = $max_cal_id + 1;

      $new_calendar{id} = $new_cal_id;
      $new_calendar{title} = "($ical_url)";
      $new_calendar{type} = "ical";
      $new_calendar{url} = $ical_url;

      $calendars{$new_cal_id} = &deep_copy(\%new_calendar);

      &add_calendars([$new_calendar{id}]);

      $results .= "messages = 'iCal calendar ($ical_url) added!';";
      $results .= "success = true;";
    }
  }

  $debug_info =~ s/\//\\\//g;
  $debug_info =~ s/\n/<br\/>/g;
  $debug_info =~ s/"/\\"/g;
  $debug_info =~ s/'/\\'/g;
  #$results .= "\ndebug_info: $debug_info";

  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n
$results
p1

}



sub js_login() {
  my $results = "";
  my $status = 1;

  if ($logged_in) {
    $results .= "logged_in = true;";
    $results .= "messages = get_lang('logged_in1')+'<br/>###debug_info###';";
    $results .= "setcookie('plans_sid','".$session->id."', null, '$cookie_path');";
  } elsif( $q->param('logout') eq "1") {
    $results .= "logged_in = false;";
    $results .= "messages = get_lang('logged_in2')+'<br/>###debug_info###';";
  } else {
    $results .= "logged_in = false;";
    $results .= "messages = get_lang('logged_in3')+'<br/>###debug_info###';";
  }

  $debug_info =~ s/\//\\\//g;
  $debug_info =~ s/\n/<br\/>/g;
  $debug_info =~ s/"/\\"/g;
  $debug_info =~ s/'/\\'/g;
  $results =~ s/###debug_info###/$debug_info/;

  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n

$results
p1

  exit(0);
}


sub manage_pending_events() {
  &normalize_timezone();

  my $approve = $q->param('approve');
  my $delete = $q->param('delete');
  my $results = "";
  my $messages = "";

  if ($logged_in_as_root || $logged_in_as_current_cal_admin) {
    $add_edit_event = "add";

    $approve =~ s/[^(\d|,)]//g;
    $approve =~ s/[^(\d|,)]//g;

    my @events_to_approve = split(',', $q->param('approve'));
    my @events_to_delete = split(',', $q->param('delete'));

    foreach $event_to_approve (@events_to_approve) {
      &commit_event($new_events{$event_to_approve});

      my $temp = $lang{pending_event_approved};
      $temp =~ s/\$1/$event_to_approve/;
      $messages .= "$temp\n";
    }
    foreach $event_to_delete (@events_to_delete) {
      my $temp = $lang{pending_event_deleted};
      $temp =~ s/\$1/$event_to_delete/;
      $messages .= "$temp\n";
    }

    push @events_to_delete, @events_to_approve;
    &delete_pending_actions(\@events_to_delete);

    $debug_info =~ s/\//\\\//g;
    $debug_info =~ s/\n/<br\/>/g;
    $debug_info =~ s/"/\\"/g;
    $debug_info =~ s/'/\\'/g;

    if ($debug_info != "") {$messages = "Debug info: $debug_info";}

    $messages =~ s/\//\\\//g;
    $messages =~ s/\n/<br\/>/g;
    $messages =~ s/"/\\"/g;
    $messages =~ s/'/\\'/g;
    #$results .= "messages = '$messages';\n";

    $results .= "window.location='$script_url/$name?messages=".&encode($messages)."';";
    #$results .= "alert(\"window.location=$script_url/$name&messages=".&encode($messages)."\");";
  } else {
    $results .= "messages = '$lang{invalid_password}';update_messages();";
    $results .= "cal_password = '';";
  }

  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n

$results
p1



}


sub generate_calendars_javascript() {
  my $results = "";

  foreach $calendar_id (sort {$a <=> $b} keys %calendars) {
    my %calendar = %{$calendars{$calendar_id}};
    $results .= "calendars[$calendar_id] = new Object;";
    $results .= "calendars[$calendar_id].users = new Array();";

    foreach $user_ref (@{$calendar{users}}) {
      my %user = %{$user_ref};
      $results .= "calendars[$calendar_id].users[$user{id}] = new Object;";
    }
  }
  return $results;
}


sub api_add_delete_events() {
  my $results = "";

  #$debug_info .= "(api_add_delete_events) before add_edit_events $events{159}{start} - $events{159}{end}\n";
  my %add_edit_events_results =  %{&add_edit_events()};
  #$debug_info .= "(api_add_delete_events) after add_edit_events $events{159}{start} - $events{159}{end}\n";


  if ($api_output_format eq "javascript") {
    if ($add_edit_events_results{success} eq "1") {
      $results .= "success=true;\n";
    } else {
      $results .= "success=false;\n";
    }

    my $messages = "";
    foreach $results_message (@{$add_edit_events_results{messages}}) {
      $messages .= &javascript_cleanup($results_message);
    }

    $debug_info = &javascript_cleanup($debug_info);
    $debug_info =~ s/\\n/<br\/>/g;


    $rightnow_messages = "messages='$debug_info\\n$messages';\n";

    $results .= $rightnow_messages;
    $results .= "update_messages(messages);";
    $results .= "dialog_box.close();";

    if ($add_edit_events_results{success} eq "1") {
      $results .= "window.location='$script_url/$name?messages=".&encode($messages)."';";
    }
  }
  print <<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n

$results
p1
}



sub fatal_error() {
  my $diagnostic_results = &diagnostic_info();


  $error_info =~ s/\n/<br>/g;

  $html_output .=<<p1;
Cache-control: no-cache,no-store,private
Content-Type: text/html; charset=iso-8859-1\n
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Plans error!</title>
</head>
<body>

<b>Plans error:</b><br/>
$error_info
<br/><br/>
<b>Diagnostic information:</b><br/>
$diagnostic_results
p1

  if ($debug_info ne "") {
    $debug_info =~ s/\n/<br>/g;
    $html_output .=<<p1;
<hr>
Debug info:<br/>
$debug_info
p1
  }

  $html_output .=<<p1;
</body>
</html>
p1

  print $html_output;
  exit(0);
}