/**
* Helper for usort, compares labels alphabetically
* Compares translations of labels if a translator is set
* @param NavigationNode $item1
* @param NavigationNode $item2
* @return int
*/
public static function compareLabel(NavigationNode $item1, NavigationNode $item2)
{
$navigation = $item1->lookup('Navigation', TRUE);
$translator = $navigation->getTranslator();
if ($translator instanceof ITranslator) {
$label1 = $translator->translate($item1->label);
$label2 = $translator->translate($item2->label);
} else {
$label1 = $item1->label;
$label2 = $item2->label;
}
$sortable = array(String::lower((string) $label1), String::lower((string) $label2));
if ($sortable[0] == $sortable[1]) {
return 0;
}
$sorted = $sortable;
sort($sorted);
return $sorted[0] == $sortable[0] ? -1 : 1;
}
