1: <?php
 2: /**
 3:  * Copyright 2010-2014 Horde LLC (http://www.horde.org/)
 4:  *
 5:  * See the enclosed file COPYING for license information (GPL). If you
 6:  * did not receive this file, see http://www.horde.org/licenses/gpl.
 7:  *
 8:  * @category  Horde
 9:  * @copyright 2010-2014 Horde LLC
10:  * @license   http://www.horde.org/licenses/gpl GPL
11:  * @package   IMP
12:  */
13: 
14: /**
15:  * A Horde_Injector based factory for the IMP_Ftree object.
16:  *
17:  * @author    Michael Slusarz <slusarz@horde.org>
18:  * @category  Horde
19:  * @copyright 2010-2014 Horde LLC
20:  * @license   http://www.horde.org/licenses/gpl GPL
21:  * @package   IMP
22:  */
23: class IMP_Factory_Ftree
24: extends Horde_Core_Factory_Injector
25: implements Horde_Shutdown_Task
26: {
27:     /* Storage key in session. */
28:     const STORAGE_KEY = 'ftree';
29: 
30:     /**
31:      * @var IMP_Ftree
32:      */
33:     private $_instance;
34: 
35:     /**
36:      * Return the IMP_Ftree object.
37:      *
38:      * @return IMP_Ftree  The singleton instance.
39:      */
40:     public function create(Horde_Injector $injector)
41:     {
42:         global $registry, $session;
43: 
44:         $this->_instance = $session->get('imp', self::STORAGE_KEY);
45: 
46:         if (!($this->_instance instanceof IMP_Ftree)) {
47:             $this->_instance = new IMP_Ftree();
48:         }
49: 
50:         switch ($registry->getView()) {
51:         case $registry::VIEW_DYNAMIC:
52:         case $registry::VIEW_SMARTMOBILE:
53:             $this->_instance->eltdiff->track = true;
54:             break;
55:         }
56: 
57:         Horde_Shutdown::add($this);
58: 
59:         return $this->_instance;
60:     }
61: 
62:     /**
63:      * Store serialized version of object in the current session.
64:      */
65:     public function shutdown()
66:     {
67:         global $session;
68: 
69:         /* Only need to store the object if the tree has changed. */
70:         if ($this->_instance->changed) {
71:             $session->set('imp', self::STORAGE_KEY, $this->_instance);
72:         }
73:     }
74: 
75: }
76: