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<?php
// This function returns a list of all calendars that the current user
// has access to. Basically, all local calendars found in the calendar
// directory, plus any webcals listed in the configuration file, but
// excluding blacklisted calendars and locked calendars which the user,
// if logged in, does not have access to.
//
// $username = The username. Empty if no username provided.
// $password = The password. Empty if no password provided.
// $cal_filename = The calendar name without .ics.
// $admin = True if this is an administrative request, in
// which case all local calendars only will be
// returned.
function availableCalendars($username, $password, $cal_filename, $admin = false) {
// Import globals.
global $calendar_path, $blacklisted_cals, $list_webcals, $locked_cals, $locked_map, $error_path_lang, $error_restrictedcal_lang, $ALL_CALENDARS_COMBINED;
// Create the list of available calendars.
$calendars = array();
// Grab the list of unlocked calendars.
$unlocked_cals = array();
if (isset($locked_map["$username:$password"])) {
$unlocked_cals = $locked_map["$username:$password"];
}
// Include all local and web calendars if asking for all calendars
// combined.
if ($cal_filename == $ALL_CALENDARS_COMBINED || $admin) {
// Add local calendars.
$dir_handle = @opendir($calendar_path)
or die(error(sprintf($error_path_lang, $calendar_path), $cal_filename));
while (($file = readdir($dir_handle)) != false) {
// Make sure this is not a dot file and it ends with .ics,
// and that it is not blacklisted.
if (!preg_match("/^[^.].+\.ics$/i", $file)) continue;
$cal_name = substr($file, 0, -4);
if (in_array($cal_name, $blacklisted_cals)) continue;
// Exclude locked calendars.
if (!$admin &&
in_array($cal_name, $locked_cals) &&
!in_array($cal_name, $unlocked_cals))
{
continue;
}
// Add this calendar.
array_push($calendars, "$calendar_path/$file");
}
// Add web calendars.
if (!$admin) {
foreach ($list_webcals as $file) {
// Make sure the URL ends with .ics.
if (!preg_match("/.ics$/i", $file)) continue;
// Add this calendar.
array_push($calendars, $file);
}
}
}
// Otherwise just include the requested calendar.
else {
// Make sure this is not a blacklisted calendar. We don't have
// to remove a .ics suffix because it would not have been passed
// in the argument.
if (in_array($cal_filename, $blacklisted_cals))
exit(error($error_restrictedcal_lang, $cal_filename));
// Make sure this calendar is not locked.
if (in_array($cal_filename, $locked_cals) &&
!in_array($cal_filename, $unlocked_cals))
{
// Use the invalid calendar message so that the user is
// not made aware of locked calendars.
exit(error($error_invalidcal_lang, $cal_filename));
}
// Add this calendar.
array_push($calendars, "$calendar_path/$cal_filename.ics");
}
// Return the sorted calendar list.
natcasesort($calendars);
return $calendars;
}
// This function returns the result of the availableCalendars function
// but only includes the calendar filename (including the .ics) and not
// the entire path.
//
// $username = The username. Empty if no username provided.
// $password = The password. Empty if no password provided.
// $cal_filename = The calendar name without .ics.
// $admin = True if this is an administrative request, in
// which case all local calendars only will be
// returned.
function availableCalendarNames($username, $password, $cal_filename, $admin = false) {
// Grab the available calendar paths.
$calendars = availableCalendars($username, $password, $cal_filename, $admin);
// Strip the paths off the calendars.
foreach (array_keys($calendars) as $key) {
$calendars[$key] = basename($calendars[$key]);
}
// Return the sorted calendar names.
natcasesort($calendars);
return $calendars;
}
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