src/Biz/Course/Dao/Impl/CourseChapterDaoImpl.php

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<?php

namespace Biz\Course\Dao\Impl;

use Biz\Course\Dao\CourseChapterDao;
use Codeages\Biz\Framework\Dao\AdvancedDaoImpl;

class CourseChapterDaoImpl extends AdvancedDaoImpl implements CourseChapterDao
{
    protected $table = 'course_chapter';

    public function getByCopyIdAndLockedCourseId($copyId, $courseId)
    {
        return $this->getByFields(array('copyId' => $copyId, 'courseId' => $courseId));
    }

    public function findByCopyId($copyId)
    {
        return $this->findByFields(array('copyId' => $copyId));
    }

    public function findChaptersByCourseId($courseId)
    {
        $sql = "SELECT * FROM {$this->table()} WHERE courseId = ? ORDER BY createdTime ASC";

        return $this->db()->fetchAll($sql, array($courseId));
    }

    public function findLessonsByCourseId($courseId)
    {
        $sql = "SELECT * FROM {$this->table()} WHERE courseId = ? AND type = 'lesson' ORDER BY createdTime ASC";

        return $this->db()->fetchAll($sql, array($courseId));
    }

    public function getChapterCountByCourseIdAndType($courseId, $type)
    {
        $sql = "SELECT COUNT(*) FROM {$this->table()} WHERE  courseId = ? AND type = ?";

        return $this->db()->fetchColumn($sql, array($courseId, $type));
    }

    public function getLastChapterByCourseIdAndType($courseId, $type)
    {
        $sql = "SELECT * FROM {$this->table()} WHERE  courseId = ? AND type = ? ORDER BY seq DESC LIMIT 1";

        return $this->db()->fetchAssoc($sql, array($courseId, $type)) ?: null;
    }

    public function getLastChapterByCourseId($courseId)
    {
        $sql = "SELECT * FROM {$this->table()} WHERE  courseId = ? ORDER BY seq DESC LIMIT 1";

        return $this->db()->fetchAssoc($sql, array($courseId)) ?: null;
    }

    public function getChapterMaxSeqByCourseId($courseId)
    {
        $sql = "SELECT MAX(seq) FROM {$this->table()} WHERE  courseId = ?";