1: <?php
 2: /**
 3:  * PHP version 5
 4:  * @package    generalDriver
 5:  * @author     Christian Schiffler <c.schiffler@cyberspectrum.de>
 6:  * @author     Stefan Heimes <stefan_heimes@hotmail.com>
 7:  * @author     Tristan Lins <tristan.lins@bit3.de>
 8:  * @copyright  The MetaModels team.
 9:  * @license    LGPL.
10:  * @filesource
11:  */
12: 
13: namespace DcGeneral\Contao\Callback;
14: 
15: use DcGeneral\Contao\View\Contao2BackendView\Event\GetBreadcrumbEvent;
16: use DcGeneral\DC_General;
17: 
18: /**
19:  * Class ContainerGetBreadcrumbCallbackListener.
20:  *
21:  * Callback handler for breadcrumbs in backend.
22:  *
23:  * @package DcGeneral\Contao\Callback
24:  */
25: class ContainerGetBreadcrumbCallbackListener extends AbstractReturningCallbackListener
26: {
27:     /**
28:      * The DC_General instance.
29:      *
30:      * @var \DcGeneral\DC_General
31:      */
32:     protected $dcGeneral;
33: 
34:     /**
35:      * Create a new instance of the listener.
36:      *
37:      * @param array|callable $callback  The callback to call when invoked.
38:      *
39:      * @param DC_General     $dcGeneral The DC_General instance to use in the callback.
40:      */
41:     public function __construct($callback, DC_General $dcGeneral)
42:     {
43:         parent::__construct($callback);
44:         $this->dcGeneral = $dcGeneral;
45:     }
46: 
47:     /**
48:      * Retrieve the arguments for the callback.
49:      *
50:      * @param GetBreadcrumbEvent $event The event being emitted.
51:      *
52:      * @return array
53:      */
54:     public function getArgs($event)
55:     {
56:         return array(
57:             $this->dcGeneral
58:         );
59:     }
60: 
61:     /**
62:      * Update the information in the event with the list of breadcrumb elements returned by the callback.
63:      *
64:      * @param GetBreadcrumbEvent $event The event being emitted.
65:      *
66:      * @param array              $value The breadcrumb elements returned by the callback.
67:      *
68:      * @return void
69:      */
70:     public function update($event, $value)
71:     {
72:         if (is_null($value))
73:         {
74:             return;
75:         }
76: 
77:         $event->setElements($value);
78:     }
79: }
80: