/**
* Checks if the position changed and update the position of the old and new level.
* If the parent changed the old and next level must updated.
* OldLevel => from OldPosition to MAX -1 <br>
* NewLevel => from newPosition to MAX +1
*
* @param Shopware\Models\Media\Album $album
* @param $newPosition
* @param $newParent
*/
private function changePosition(Album $album, $newPosition, $newParent)
{
//position or level not changed?
if ($newParent == $album->getParentId() && $newPosition == $album->getPosition()) {
return;
}
//0 can not be used, because Doctrine would otherwise check if the album with the id 0 exists.
$newParent = ($newParent == 0) ? null : $newParent;
//moved up or down? down => -1 / up = +1
$step = ($newPosition < $album->getPosition()) ? 1 : -1;
//Start and end values determined.
$fromPosition = ($step == 1) ? $newPosition - 1 : $album->getPosition();
$toPosition = ($step == 1) ? $album->getPosition() : $newPosition + 1;
//same parent? Then change only the position of the current album level.
if ($newParent == $album->getParentId()) {
$this->changePositionBetween($fromPosition, $toPosition, $step, $album->getParentId());
} else {
//change the position of the old level
$this->changePositionBetween($album->getPosition(), 99999, -1, $album->getParentId());
//change the position of the new level
$this->changePositionBetween($newPosition - 1, 99999, +1, $newParent);
}
}
