Move follow revoke protocol to worker task

- Switch to public contact for revoke_follow hook

src/Worker/Contact/RevokeFollow.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Worker\Contact;
+
+use Friendica\Core\Protocol;
+use Friendica\Core\Worker;
+use Friendica\Model\Contact;
+
+class RevokeFollow
+{
+	/**
+	 * Issue asynchronous follow revokation message to remote servers.
+	 * The local relationship has already been updated, so we can't use the user-specific contact
+	 *
+	 * @param int $cid Target public contact id
+	 * @param int $uid Source local user id
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	public static function execute(int $cid, int $uid)
+	{
+		$contact = Contact::getById($cid);
+		if (empty($contact)) {
+			return;
+		}
+
+		$result = Protocol::revokeFollow($contact, $uid);
+		if ($result === false) {
+			Worker::defer();
+		}
+	}
+}