protected static function cache($categories, PermissionKeyCategory $pkc) {
if (!is_array($categories)) {
$categories = array();
}
$categories[$pkc->getPermissionKeyCategoryID()] = $pkc;
$categories[$pkc->getPermissionKeyCategoryHandle()] = $pkc;
Cache::set('permission_key_categories', false, $categories);
}
protected function populateCategories() {
$db = Loader::db();
self::$categories = array();
$r = $db->Execute('select pkCategoryID, pkCategoryHandle, pkgID from PermissionKeyCategories');
while ($row = $r->FetchRow()) {
$pkc = new PermissionKeyCategory();
$pkc->setPropertiesFromArray($row);
self::$categories[$pkc->getPermissionKeyCategoryID()] = $pkc;
self::$categories[$pkc->getPermissionKeyCategoryHandle()] = $pkc;
}
}