public static function unset_value($key = "", $value = "")
{
if (!USE_SESSIONCACHE) {
return FALSE;
}
if (!isset($_SESSION["KOALA_CACHE"])) {
sessioncache::initialize_cache();
return TRUE;
}
unset($_SESSION["KOALA_CACHE"][$key]);
return TRUE;
}
public function is_semester_admin($semester, $user)
{
$semestername = $semester->get_groupname();
$ret = sessioncache::get_value("lms_steam::is_semester_admin(" . $semestername . "):" . $user->get_id());
if ($ret === CACHE_UNDEFINED) {
$admins = steam_factory::groupname_to_object($GLOBALS["STEAM"]->get_id(), $semestername . ".admins");
$ret = FALSE;
try {
$ret = $admins->is_member($user);
} catch (Exception $e) {
// Do nothing (but log it)
error_log("lms_steam::is_semester_admin: no admin group found for semester id=" . $semester->get_id());
}
sessioncache::set_value("lms_steam::is_semester_admin(" . $semestername . "):" . $user->get_id(), $ret);
}
return $ret;
}
/**
* Checks whether the extension is enabled. If you pass a koala_object as
* a parameter, then the function will check whether the extension is
* enabled for that object. Otherwise it will check whether the extension
* is enabled globally.
*
* You cannot override this function, but you can override is_enabled_for()
* in your extension to specify whether it is enabled or disabled for a
* given object.
*
* @see is_default_enabled
* @see is_enabled_for
*
* @param koala_object $koala_object
* @return boolean TRUE if the extension is enabled, FALSE if it is disabled
*/
final function is_enabled($koala_object = FALSE)
{
if ($koala_object === FALSE) {
if (!is_object($this->steam_object)) {
return FALSE;
}
$ret = sessioncache::get_value("koala_extension::is_enabled: " . $this->get_name());
if ($ret === CACHE_UNDEFINED) {
$ret = $this->get_attribute("EXTENSION_ENABLED");
sessioncache::set_value("koala_extension::is_enabled: " . $this->get_name(), $ret);
}
return $ret === "TRUE" ? TRUE : FALSE;
}
$enabled_for = $this->is_enabled_for($koala_object);
return $enabled_for;
}
