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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 $allow_login, $calendar_path, $blacklisted_cals, $list_webcals, $locked_cals, $locked_map, $apache_map, $lang, $ALL_CALENDARS_COMBINED, $_SERVER;
// Create the list of available calendars.
$calendars = array();
// Grab any HTTP authentication.
unset($http_user);
if ((isset($_SERVER['PHP_AUTH_USER'])) && ($allow_login == 'yes')) {
$http_user = $_SERVER['PHP_AUTH_USER'];
}
// 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($lang['l_error_path'], $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, $blacklisted_cals)) continue;
// If HTTP authenticated, make sure this calendar is available
// to the user.
if (isset($http_user)) {
if (!in_array($cal_name, $apache_map[$http_user])) continue;
}
// Otherwise exclude locked calendars.
else 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 (!isset($http_user) && !$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, $file);
}
}
}
// Otherwise just include the requested calendar.
else {
if(!is_array($cal_filename)) {
$cal_filename_local = array($cal_filename);
}
else {
$cal_filename_local = $cal_filename;
}
foreach($cal_filename_local as $c) {
// Make sure this is not a blacklisted calendar. We don't have
// to remove a .ics suffix because it would not have been passed
// in the argument.
if (in_array($c, $blacklisted_cals))
exit(error($lang['l_error_restrictedcal'], $c));
// If HTTP authenticated, make sure this calendar is available
// to the user.
if (isset($http_user)) {
if (!in_array($c, $apache_map[$http_user])) {
// Use the invalid calendar message so that the user is
// not made aware of locked calendars.
exit(error($lang['l_error_invalidcal'], $c));
}
}
// Otherwise make sure this calendar is not locked.
else if (in_array($c, $locked_cals) &&
!in_array($c, $unlocked_cals))
{
// Use the invalid calendar message so that the user is
// not made aware of locked calendars.
exit(error($lang['l_error_invalidcal'], $c));
}
// Add this calendar.
array_push($calendars, "$calendar_path/$c.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;
}
// This function prints out the calendars available to the user, for
// selection. Should be enclosed within a <select>...</select>, which
// is not printed out by this function.
//
// $cals = The calendars (entire path, e.g. from availableCalendars).
function display_ical_list($cals, $pick=FALSE) {
global $cal, $ALL_CALENDARS_COMBINED, $current_view, $getdate, $calendar_lang, $all_cal_comb_lang;
// Print each calendar option.
foreach ($cals as $cal_tmp) {
// Format the calendar path for display.
//
// Only display the calendar name, replace all instances of "32" with " ",
// and remove the .ics suffix.
$cal_displayname_tmp = basename($cal_tmp);
$cal_displayname_tmp = str_replace("32", " ", $cal_displayname_tmp);
$cal_displayname_tmp = substr($cal_displayname_tmp, 0, -4);
// If this is a webcal, add 'Webcal' to the display name.
if (preg_match("/^(https?|webcal):\/\//i", $cal_tmp)) {
$cal_displayname_tmp .= " Webcal";
}
// Otherwise, remove all the path information, since that should
// not be used to identify local calendars. Also add the calendar
// label to the display name.
else {
// Strip path and .ics suffix.
$cal_tmp = basename($cal_tmp);
$cal_tmp = substr($cal_tmp, 0, -4);
// Add calendar label.
$cal_displayname_tmp .= " $calendar_lang";
}
// Encode the calendar path.
$cal_encoded_tmp = urlencode($cal_tmp);
// Display the option.
//
// The submitted calendar will be encoded, and always use http://
// if it is a webcal. So that is how we perform the comparison when
// trying to figure out if this is the selected calendar.
if($pick) {
if (in_array($cal_encoded_tmp, explode(",", $cal))) {
$return .= "<option value=\"$cal_encoded_tmp\" selected=\"selected\">$cal_displayname_tmp</option>\n";
} else {
$return .= "<option value=\"$cal_encoded_tmp\">$cal_displayname_tmp</option>\n";
}
} else {
$cal_httpPrefix_tmp = str_replace('webcal://', 'http://', $cal_tmp);
if ($cal_httpPrefix_tmp == urldecode($cal)) {
$return .= "<option value=\"$current_view.php?cal=$cal_encoded_tmp&getdate=$getdate\" selected=\"selected\">$cal_displayname_tmp</option>";
} else {
$return .= "<option value=\"$current_view.php?cal=$cal_encoded_tmp&getdate=$getdate\">$cal_displayname_tmp</option>";
}
}
}
// option to open all (non-web) calenders together
if (!$pick) {
if ($cal == $ALL_CALENDARS_COMBINED) {
$return .= "<option value=\"$current_view.php?cal=$ALL_CALENDARS_COMBINED&getdate=$getdate\" selected=\"selected\">$all_cal_comb_lang</option>";
} else {
$return .= "<option value=\"$current_view.php?cal=$ALL_CALENDARS_COMBINED&getdate=$getdate\">$all_cal_comb_lang</option>";
}
}
return $return;
}
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