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:  * Common code relating to image viewing preferences.
 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_Images
 24: {
 25:     /**
 26:      * Always show inline images?
 27:      *
 28:      * @var boolean
 29:      */
 30:     public $alwaysShow = false;
 31: 
 32:     /**
 33:      * Results cache.
 34:      *
 35:      * @var array
 36:      */
 37:     protected $_cache = array();
 38: 
 39:     /**
 40:      * Show inline images in messages?
 41:      *
 42:      * @param IMP_Contents $contents  The contents object containing the
 43:      *                                message.
 44:      *
 45:      * @return boolean  True if inline image should be shown.
 46:      */
 47:     public function showInlineImage(IMP_Contents $contents)
 48:     {
 49:         $cid = strval($contents);
 50: 
 51:         if (!isset($this->_cache[$cid])) {
 52:             $this->_cache[$cid] = $this->_showInlineImage($contents);
 53:         }
 54: 
 55:         return $this->_cache[$cid];
 56:     }
 57: 
 58:     /**
 59:      * @see showInlineImage
 60:      */
 61:     protected function _showInlineImage(IMP_Contents $contents)
 62:     {
 63:         global $injector, $prefs;
 64: 
 65:         if ($this->alwaysShow || !$prefs->getValue('image_replacement')) {
 66:             return true;
 67:         }
 68: 
 69:         if (!$contents ||
 70:             !($from = $contents->getHeader()->getOb('from'))) {
 71:             return false;
 72:         }
 73: 
 74:         $res = $injector->getInstance('IMP_Contacts')->searchEmail($from[0]->bare_address, array(
 75:             'email_exact' => true
 76:         ));
 77: 
 78:         if (count($res)) {
 79:             /* Don't allow personal addresses by default - this is the only
 80:              * e-mail address a Spam sender for sure knows you will recognize
 81:              * so it is too much of a loophole. */
 82:             $res->setIteratorFilter(0, $injector->getInstance('IMP_Identity')->getAllFromAddresses());
 83: 
 84:             foreach ($from as $val) {
 85:                 if ($res->contains($val)) {
 86:                     return true;
 87:                 }
 88:             }
 89:         }
 90: 
 91:         /* Check safe address list. */
 92:         $safeAddrs = $injector->getInstance('IMP_Prefs_Special_ImageReplacement')->safeAddrList();
 93:         foreach ($from as $val) {
 94:             if ($safeAddrs->contains($val)) {
 95:                 return true;
 96:             }
 97:         }
 98: 
 99:         return false;
100:     }
101: 
102: }
103: