+ if (empty($uid)) {
+ // Fetch the list of administrators
+ $admin_mail = explode(',', str_replace(' ', '', Config::get('config', 'admin_email')));
+
+ // We need to use some user as a sender. It doesn't care who it will send. We will use an administrator account.
+ $condition = ['verified' => true, 'blocked' => false, 'account_removed' => false, 'account_expired' => false, 'email' => $admin_mail];
+ $first_user = DBA::selectFirst('user', ['uid'], $condition);
+ $uid = $first_user['uid'];
+ }
+
+ $condition = ['verb' => ACTIVITY_FOLLOW, 'uid' => 0, 'parent-uri' => $object,
+ 'author-id' => Contact::getPublicIdByUserId($uid)];
+ if (Item::exists($condition)) {
+ Logger::log('Follow for ' . $object . ' for user ' . $uid . ' does already exist.', Logger::DEBUG);
+ return false;
+ }
+