1: <?php
 2: /**
 3:  * Copyright 2013-2014 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 2013-2014 Horde LLC
10:  * @license   http://www.horde.org/licenses/gpl GPL
11:  * @package   IMP
12:  */
13: 
14: /**
15:  * Iterator for the IMP_Ftree object.
16:  *
17:  * @author    Michael Slusarz <slusarz@horde.org>
18:  * @category  Horde
19:  * @copyright 2013-2014 Horde LLC
20:  * @license   http://www.horde.org/licenses/gpl GPL
21:  * @package   IMP
22:  */
23: class IMP_Ftree_Iterator implements RecursiveIterator
24: {
25:     /**
26:      * Sorted list of elements.
27:      *
28:      * @var array
29:      */
30:     protected $_elts = array();
31: 
32:     /**
33:      * Constructor.
34:      *
35:      * @param mixed $elt  Either the parent element of the level
36:      *                    (IMP_Ftree_Element object), or a flat list of
37:      *                    Ftree elements to use as the base level.
38:      */
39:     public function __construct($elt)
40:     {
41:         $this->_elts = ($elt instanceof IMP_Ftree_Element)
42:             ? $elt->child_list
43:             : $elt;
44:     }
45: 
46:     /* RecursiveIterator methods. */
47: 
48:     /**
49:      */
50:     public function getChildren()
51:     {
52:         return new self($this->current());
53:     }
54: 
55:     /**
56:      */
57:     public function hasChildren()
58:     {
59:         return $this->current()->children;
60:     }
61: 
62:     /**
63:      */
64:     public function current()
65:     {
66:         return current($this->_elts);
67:     }
68: 
69:     /**
70:      */
71:     public function key()
72:     {
73:         return key($this->_elts);
74:     }
75: 
76:     /**
77:      */
78:     public function next()
79:     {
80:         next($this->_elts);
81:     }
82: 
83:     /**
84:      */
85:     public function rewind()
86:     {
87:         reset($this->_elts);
88:     }
89: 
90:     /**
91:      */
92:     public function valid()
93:     {
94:         return !is_null($this->key());
95:     }
96: 
97: }
98: