public function getCourseItems($courseId)
{
$lessons = LessonSerialize::unserializes($this->getLessonDao()->findLessonsByCourseId($courseId));
$chapters = $this->getChapterDao()->findChaptersByCourseId($courseId);
$items = array();
foreach ($lessons as $lesson) {
$lesson['itemType'] = 'lesson';
$items["lesson-{$lesson['id']}"] = $lesson;
}
foreach ($chapters as $chapter) {
$chapter['itemType'] = 'chapter';
$items["chapter-{$chapter['id']}"] = $chapter;
}
uasort($items, function ($item1, $item2) {
return $item1['seq'] > $item2['seq'];
});
return $items;
}
