/**
* Creates a tree of a flat array of {@link Folder}s or {@link SimpleFolder}s.
* @param array $folders An array of {@link Folder}s or {@link SimpleFolder}s. May be mixed.
* @throws FolderException Thrown if an error occurs while building the folder tree.
* @author Björn Hjortsten
* @return array An array of top level {@link Folder}s.
*/
public static function createTree(array $folders)
{
usort($folders, array('Kaigan\\QBank2\\API\\Model\\SimpleFolder', 'compareByTree'));
$tree = array();
$shortestTree = Folder::getShortestTree($folders);
foreach ($folders as $folder) {
if ($folder instanceof SimpleFolder) {
$folder = Folder::createFromSimpleFolder($folder);
}
try {
Folder::addToTree($tree, $folder, $shortestTree);
} catch (FolderException $fe) {
trigger_error($fe->getMessage(), E_USER_WARNING);
}
}
return $tree;
}
