public static function getLessonCont($id){
$summary=[];
$cont = LectureElement::model()->findAll("id_lecture=:id and id_type=:type", array(':type'=>'8', ':id'=>$id));
$i=0;
foreach($cont as $type){
$summary[$i] =$type->html_block;
$i++;
}
return $summary;
}
public function swapBlocks($idLecture, $first, $second)
{
//find blocks id's for first and second elements
$firstId = LectureElement::model()->findByAttributes(array('id_lecture' => $idLecture, 'block_order' => $first))->id_block;
$secondId = LectureElement::model()->findByAttributes(array('id_lecture' => $idLecture, 'block_order' => $second))->id_block;
//swap blocks - rewrite block order in DB
LectureElement::model()->updateByPk($secondId, array('block_order' => $first));
LectureElement::model()->updateByPk($firstId, array('block_order' => $second));
}
