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:  * A factory for creating the storage object to use for compose attachments.
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_Factory_ComposeAtc extends Horde_Core_Factory_Base
24: {
25:     /**
26:      * The class to use for attachment storage.
27:      *
28:      * @var string
29:      */
30:     public $classAtc = 'IMP_Compose_Attachment_Storage_Temp';
31: 
32:     /**
33:      * The class to use for linked storage.
34:      *
35:      * @var string
36:      */
37:     public $classLinked = 'IMP_Compose_Attachment_Storage_VfsLinked';
38: 
39:     /**
40:      * Instances.
41:      *
42:      * @var array
43:      */
44:     private $_instances = array();
45: 
46:     /**
47:      * Return the requested attachment storage instance.
48:      *
49:      * @param string $user  User.
50:      * @param string $id    Attachment identifier.
51:      * @param string $type  Either 'atc' or 'linked'. If null, will
52:      *                      auto-determine.
53:      *
54:      * @return IMP_Compose_Attachment_Storage  Storage object.
55:      * @throws IMP_Exception
56:      */
57:     public function create($user = null, $id = null, $type = null)
58:     {
59:         global $conf;
60: 
61:         if (($type == 'linked') ||
62:             (is_null($type) && !empty($conf['compose']['link_attachments']))) {
63:             $classname = empty($conf['compose']['link_attach_threshold'])
64:                 ? $this->classLinked
65:                 : 'IMP_Compose_Attachment_Storage_AutoDetermine';
66:         } else {
67:             $classname = $this->classAtc;
68:         }
69: 
70:         if (is_null($user)) {
71:             $user = $GLOBALS['registry']->getAuth();
72:         }
73: 
74:         if (is_null($id)) {
75:             return new $classname($user);
76:         }
77: 
78:         $sig = hash(
79:             (PHP_MINOR_VERSION >= 4) ? 'fnv132' : 'sha1',
80:             implode('|', array($user, $id))
81:         );
82: 
83:         if (!isset($this->_instances[$sig])) {
84:             $this->_instances[$sig] = new $classname($user, $id);
85:         }
86: 
87:         return $this->_instances[$sig];
88:     }
89: 
90: }
91: