course-tencent-cloud/app/Services/Frontend/CourseFavorite.php

<?php

namespace App\Services\Frontend;

use App\Models\CourseFavorite as FavoriteModel;
use App\Repos\CourseFavorite as CourseFavoriteRepo;

class CourseFavorite extends Service
{

    use CourseTrait;

    public function saveFavorite($id)
    {
        $course = $this->checkCourse($id);

        $user = $this->getLoginUser();

        $favoriteRepo = new CourseFavoriteRepo();

        $favorite = $favoriteRepo->findCourseFavorite($course->id, $user->id);

        if (!$favorite) {

            $favorite = new FavoriteModel();
            $favorite->course_id = $course->id;
            $favorite->user_id = $user->id;
            $favorite->create();

            $course->favorite_count += 1;
            $course->update();

        } else {

            if ($favorite->deleted == 0) {
                $favorite->deleted = 1;
                $course->favorite_count -= 1;
            } else {
                $favorite->deleted = 0;
                $course->favorite_count += 1;
            }

            $favorite->update();
            $course->update();
        }
    }

}