/**
* Returns whether the post is attempting to delete an undeletable page
*
* @return boolean
*/
protected function _postHasDeletedUndeletablePage()
{
// get undeleteable page uids from new navigation
$nav = $this->_getNavigationFromPost();
$iterator = new RecursiveIteratorIterator($nav, RecursiveIteratorIterator::SELF_FIRST);
$newUndeleteableUids = array();
foreach ($iterator as $page) {
if ($page->can_delete == false) {
$newUndeleteableUids[] = $page->uid;
}
}
// make sure every undeleteable page uid from old navigation is in the list of new undeleteable page uids
$nav = Omeka_Navigation::createNavigationFromFilter('public_navigation_main');
$iterator = new RecursiveIteratorIterator($nav, RecursiveIteratorIterator::SELF_FIRST);
foreach ($iterator as $page) {
if ($page->can_delete == false) {
if (!in_array($page->uid, $newUndeleteableUids)) {
$this->addError(__('Navigation links that have undeleteable sublinks cannot be deleted.'));
return true;
}
}
}
return false;
}
