Newscoop\GimmeBundle\Controller\UserTopicsController::linkOrUnlinkResources PHP Method

    private function linkOrUnlinkResources(array $resources, $user, $follow = false)
    {
        $matched = false;
        foreach ($resources as $key => $objectArray) {
            if (!is_array($objectArray)) {
                return true;
            }
            $object = $objectArray['object'];
            if ($object instanceof \Exception) {
                throw $object;
            }
            if ($object instanceof Topic) {
                $userTopicService = $this->get('user.topic');
                if ($follow) {
                    $userTopicService->followTopic($user, $object);
                } else {
                    $userTopicService->unfollowTopic($user, $object);
                }
                $matched = true;
                continue;
            }
        }
        if ($matched === false) {
            throw new InvalidParametersException('Any supported link object not found');
        }
    }