/**
* Helper for usort, compares priority values
* @param NavigationNode $item1
* @param NavigationNode $item2
* @param int $sortingMethod
* @return int;
*/
public static function comparePriority(NavigationNode $item1, NavigationNode $item2, $sortingMethod = self::SORT_PRIORITY)
{
switch ($sortingMethod) {
case self::SORT_PRIORITY:
$sortable = array($item1->getPriority(), $item2->getPriority());
break;
case self::SORT_PRIORITY_INTEGER:
$sortable = array((double) $item1->getPriority(), (double) $item2->getPriority());
break;
case self::SORT_PRIORITY_STRING:
$sortable = array(String::lower((string) $item1->getPriority()), String::lower((string) $item2->getPriority()));
break;
default:
throw new InvalidStateException("No match for sorting method");
}
if ($sortable[0] == $sortable[1]) {
return 0;
}
$sorted = $sortable;
sort($sorted);
return $sorted[0] == $sortable[0] ? -1 : 1;
}
