src/AppBundle/Controller/ExploreController.php

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<?php

namespace AppBundle\Controller;

use AppBundle\Common\ArrayToolkit;
use AppBundle\Common\Paginator;
use Biz\Activity\Service\ActivityService;
use Biz\Classroom\Service\ClassroomService;
use Biz\Course\Service\CourseService;
use Biz\Course\Service\CourseSetService;
use Biz\System\Service\SettingService;
use Biz\Task\Service\TaskService;
use Biz\Taxonomy\Service\CategoryService;
use Biz\Taxonomy\Service\TagService;
use Symfony\Component\HttpFoundation\Request;

class ExploreController extends BaseController
{
    const EMPTY_COURSE_SET_IDS = 0;

    public function courseSetsAction(Request $request, $category)
    {
        $conditions = $request->query->all();

        list($conditions, $filter) = $this->getFilter($conditions, 'course');

        list($conditions, $tags) = $this->getConditionsByTags($conditions);
        $conditions = $this->getCourseConditionsByTags($conditions);

        list($conditions, $categoryArray, $categoryParent) = $this->mergeConditionsByCategory($conditions, $category);

        $conditions = $this->getConditionsByVip($conditions, $filter['currentLevelId']);
        $conditions = $this->mergeConditionsByVip($conditions);

        unset($conditions['code']);

        if (isset($conditions['ids']) && empty($conditions['ids'])) {
            $conditions['ids'] = array(-1);
        }

        list($conditions, $orderBy) = $this->getCourseSetSearchOrderBy($conditions);
        $conditions = $this->getCourseSetFilterType($conditions);

        $conditions['parentId'] = 0;
        $conditions['status'] = 'published';

        $paginator = new Paginator(
            $this->get('request'),
            $this->getCourseSetService()->countCourseSets($conditions),
            20
        );

        $courseSets = array();
        if ('recommendedSeq' !== $orderBy) {
            $courseSets = $this->getCourseSetService()->searchCourseSets(
                $conditions,
                $orderBy,
                $paginator->getOffsetCount(),
                $paginator->getPerPageCount()
            );