src/AppBundle/Controller/Activity/ExerciseController.php

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<?php

namespace AppBundle\Controller\Activity;

use AppBundle\Common\ArrayToolkit;
use Biz\Course\Service\CourseService;
use Biz\Activity\Service\ActivityService;
use Biz\Question\Service\QuestionService;
use Biz\Testpaper\Service\TestpaperService;
use Symfony\Component\HttpFoundation\Request;

class ExerciseController extends BaseActivityController implements ActivityActionInterface
{
    public function showAction(Request $request, $activity, $preview = 0)
    {
        if ($preview) {
            return $this->previewExercise($activity['id'], $activity['fromCourseId']);
        }

        $user = $this->getUser();

        $activity = $this->getActivityService()->getActivity($activity['id']);
        $exercise = $this->getTestpaperService()->getTestpaperByIdAndType($activity['mediaId'], $activity['mediaType']);
        $exerciseResult = $this->getTestpaperService()->getUserLatelyResultByTestId($user['id'], $exercise['id'], $activity['fromCourseId'], $activity['id'], $activity['mediaType']);

        if (!$exerciseResult || ($exerciseResult['status'] == 'doing' && !$exerciseResult['updateTime'])) {
            return $this->render('activity/exercise/show.html.twig', array(
                'activity' => $activity,
                'exerciseResult' => $exerciseResult,
                'exercise' => $exercise,
                'courseId' => $activity['fromCourseId'],
            ));
        }

        return $this->forward('AppBundle:Exercise:startDo', array(
            'lessonId' => $activity['id'],
            'exerciseId' => $activity['mediaId'],
        ));
    }

    public function previewAction(Request $request, $task)
    {
        return $this->previewExercise($task['activityId'], $task['courseId']);
    }

    protected function previewExercise($id, $courseId)
    {
        $activity = $this->getActivityService()->getActivity($id);
        $exercise = $this->getTestpaperService()->getTestpaperByIdAndType($activity['mediaId'], $activity['mediaType']);

        if (!$exercise) {
            return $this->createMessageResponse('error', 'exercise not found');
        }

        $questions = $this->getTestpaperService()->showTestpaperItems($exercise['id']);
        $attachments = $this->getTestpaperService()->findAttachments($exercise['id']);

        $exercise['itemCount'] = $this->getActureQuestionNum($questions);

        return $this->render('activity/exercise/preview.html.twig', array(