-
-require_once('include/event.php');
-require_once('include/redir.php');
-
-function cal_init(&$a) {
+use Friendica\App;
+use Friendica\Content\Feature;
+use Friendica\Core\Config;
+use Friendica\Core\PConfig;
+use Friendica\Core\System;
+use Friendica\Database\DBM;
+use Friendica\Model\Contact;
+
+require_once 'include/event.php';
+require_once 'include/redir.php';
+
+function cal_init(App $a) {