/**
* Gets the article's ordering
* Also reorder the context table
*
* @param string $place place of the new inserted article. 'first, 'last' or 'after'
* @param int $id_page
* @param int $id_ref ID of the referent article. Must be set if place is 'after'
* @return int place of the article
*/
protected function _get_ordering($place, $id_page, $id_ref = NULL)
{
$existing_ordering = $this->article_model->get_articles_ordering($id_page);
$ordering = '0';
switch ($place) {
case 'first':
$this->article_model->shift_article_ordering($id_page);
$ordering = '1';
break;
case 'last':
$ordering = count($existing_ordering) + 1;
break;
case 'after':
$new_pos = array_search($id_ref, $existing_ordering) + 2;
// Shift every article with a greater pos than ordering_after
$this->article_model->shift_article_ordering($id_page, $new_pos);
$ordering = $new_pos;
break;
}
return $ordering;
}