src/Biz/OpenCourse/Service/Impl/OpenCourseRecommendedServiceImpl.php

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<?php

namespace Biz\OpenCourse\Service\Impl;

use Biz\BaseService;
use AppBundle\Common\ArrayToolkit;
use Biz\Common\CommonException;
use Biz\OpenCourse\Dao\RecommendedCourseDao;
use Biz\OpenCourse\Service\OpenCourseRecommendedService;

class OpenCourseRecommendedServiceImpl extends BaseService implements OpenCourseRecommendedService
{
    public function getRecommendedCourseByCourseIdAndType($openCourseId, $recommendCourseId, $type)
    {
        return $this->getRecommendedCourseDao()->getByCourseIdAndType($openCourseId, $recommendCourseId, $type);
    }

    public function addRecommendedCourses($openCourseId, $recommendCourseIds, $type)
    {
        if (empty($recommendCourseIds)) {
            return true;
        }

        $recommendCourses = array();

        foreach ($recommendCourseIds as $key => $courseId) {
            $exitsRecommendCourse = $this->getRecommendedCourseByCourseIdAndType($openCourseId, $courseId, $type);

            if (!$exitsRecommendCourse) {
                $fields = array(
                    'recommendCourseId' => $courseId,
                    'openCourseId' => $openCourseId,
                    'type' => $type,
                );
                $recommendCourses[] = $this->getRecommendedCourseDao()->create($fields);
            }
        }

        $recommendIds = ArrayToolkit::column($recommendCourses, 'id');

        $this->refreshCoursesSeq($openCourseId, $recommendIds);

        return $recommendCourses;
    }

    public function updateOpenCourseRecommendedCourses($openCourseId, $activeRecommendIds)
    {
        $allExistingRecommendedCourses = $this->findRecommendedCoursesByOpenCourseId($openCourseId);

        $existRecommendedIds = ArrayToolkit::column($allExistingRecommendedCourses, 'recommendCourseId');

        if (empty($activeRecommendIds)) {
            $this->deleteBatchRecommendCourses($existRecommendedIds);
        } else {
            $diff = array_diff($existRecommendedIds, $activeRecommendIds);

            if (!empty($diff)) {
                $this->deleteBatchRecommendCourses($diff);
            }
        }