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<?php
/**
* breadcrumb.php - Provides bread crumb navigation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* @author Peter Thienel <thienel@data-quest.de>
* @license http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
* @category Stud.IP
* @since 3.5
*/
class BreadCrumb
{
/**
* Array with parts of bread crumb navigation.
*
* @var array
*/
private $trail = [];
public function __construct()
{
URLHelper::bindLinkParam('trail', $this->trail);
}
/**
* Appends a new element to the end of the bread crumb navigation.
*
* @param MvvTreeItem $object The MvvTreeItem object of the current view
* to append.
* @param string $action The url to the current view.
*/
public function append($object, $action)
{
$trail = $this->getTrail();
$id = '';
if (is_object($object)) {
$type = get_class($object);
$id = $object->id;
$trail[$type] = [
'id' => $object->id,
'actn' => $action
];
} else if (is_array($object)) {
$id = reset($object)->id;
$type = get_class(reset($object));
foreach ($object as $obj) {
if ($obj && $obj->id != $id) {
$additional_objects[get_class($obj)] = $obj->id;
}
}
$trail[$type] = [
'id' => $id,
'add' => $additional_objects,
'actn' => $action
];
} else {
$trail[$action] = [
'name' => $object,
'actn' => $action
];
}
$newTrail = [];
$lastElement = false;
foreach ($trail as $key => $trail_item) {
if ($lastElement) break;
$newTrail[$key] = $trail_item;
$lastElement = $key === $id;
}
$this->trail = $newTrail;
}
/**
* Removes the last element from the bread crumb navigation.
*/
public function pop()
{
array_pop($this->trail);
}
/**
* Returns all elements of the bread crumb navigation.
*
* @return array All elements of the bread crumb navigation
*/
public function getTrail()
{
return $this->trail;
}
/**
* Initialize a new bread crumb navigation.
*/
public function init()
{
$this->trail = [];
}
}
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