src/ApiBundle/Api/Resource/Classroom/ClassroomMember.php

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<?php

namespace ApiBundle\Api\Resource\Classroom;

use ApiBundle\Api\ApiRequest;
use ApiBundle\Api\Resource\AbstractResource;
use Biz\Classroom\ClassroomException;
use Biz\Classroom\Service\ClassroomService;
use Biz\Exception\UnableJoinException;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;

class ClassroomMember extends AbstractResource
{
    public function add(ApiRequest $request, $classroomId)
    {
        $classroom = $this->getClassroomService()->getClassroom($classroomId);

        if (!$classroom) {
            throw ClassroomException::NOTFOUND_CLASSROOM();
        }

        $member = $this->getClassroomService()->getClassroomMember($classroomId, $this->getCurrentUser()->getId());
        if (!$member || $member['role'] == array('auditor')) {
            $member = $this->tryJoin($classroom);
        }

        if ($member) {
            $this->getOCUtil()->single($member, array('userId'));
            $member['isOldUser'] = true;

            return $member;
        }

        return null;
    }

    private function tryJoin($classroom)
    {
        try {
            $this->getClassroomService()->tryFreeJoin($classroom['id']);
        } catch (UnableJoinException $e) {
            throw new BadRequestHttpException($e->getMessage(), $e);
        }

        $member = $this->getClassroomService()->getClassroomMember($classroom['id'], $this->getCurrentUser()->getId());
        if (!empty($member)) {
            $this->getLogService()->info('classroom', 'join_classroom', "加入班级《{$classroom['title']}》", array('classroomId' => $classroom['id'], 'title' => $classroom['title']));
        }

        return $member;
    }

    /**
     * @return \Biz\System\Service\Impl\LogServiceImpl
     */
    private function getLogService()
    {
        return $this->service('System:LogService');
    }