/**
* Constructor for RenderCache
*
* Sets up paths and gets the list of groups from file
*/
public static function __static()
{
//Define the cache path and url
self::$cache_path = HABARI_PATH . '/' . self::$rel_cache_path;
self::$cache_url = Site::get_url('habari') . '/' . self::$rel_cache_path;
//If the cache directory doesn't exist, make it
if (!is_dir(self::$cache_path)) {
mkdir(self::$cache_path, 0755);
}
//Enable only if the cache directory now exists and is writable
self::$enabled = is_dir(self::$cache_path) && is_writeable(self::$cache_path);
//Give an error if the cache directory is not writable
if (!self::$enabled) {
Session::error(sprintf(_t("The cache directory '%s' is not writable - the cache is disabled. The user, or group, which your web server is running as, needs to have read, write, and execute permissions on this directory."), self::$cache_path), 'RenderCache');
EventLog::log(sprintf(_t("The cache directory '%s' is not writable - the cache is disabled."), self::$cache_path), 'notice', 'RenderCache', 'habari');
return;
}
//Get the list of group names
$group_file = self::get_group_list_file();
if (file_exists($group_file)) {
self::$group_list = unserialize(file_get_contents($group_file));
} else {
self::$group_list = array();
}
}
public function clear_cache($ui)
{
Session::notice(_t('All rendered LaTeX images in the cache have been deleted.'));
//Expire all cached images
$group = 'jLaTeX';
$name = '*';
RenderCache::expire(array($group, $name), 'glob');
return false;
}