1: <?php
  2: /**
  3:  * A Horde_Injector:: based IMP_Compose:: factory.
  4:  *
  5:  * PHP version 5
  6:  *
  7:  * @author   Michael Slusarz <slusarz@horde.org>
  8:  * @category Horde
  9:  * @license  http://www.horde.org/licenses/gpl GPL
 10:  * @link     http://pear.horde.org/index.php?package=IMP
 11:  * @package  IMP
 12:  */
 13: 
 14: /**
 15:  * A Horde_Injector:: based IMP_Compose:: factory.
 16:  *
 17:  * Copyright 2010-2012 Horde LLC (http://www.horde.org/)
 18:  *
 19:  * See the enclosed file COPYING for license information (GPL). If you
 20:  * did not receive this file, see http://www.horde.org/licenses/gpl.
 21:  *
 22:  * @author   Michael Slusarz <slusarz@horde.org>
 23:  * @category Horde
 24:  * @license  http://www.horde.org/licenses/gpl GPL
 25:  * @link     http://pear.horde.org/index.php?package=IMP
 26:  * @package  IMP
 27:  */
 28: class IMP_Factory_Compose extends Horde_Core_Factory_Base
 29: {
 30:     /**
 31:      * Instances.
 32:      *
 33:      * @var array
 34:      */
 35:     private $_instances = array();
 36: 
 37:     /**
 38:      */
 39:     public function __construct(Horde_Injector $injector)
 40:     {
 41:         parent::__construct($injector);
 42: 
 43:         register_shutdown_function(array($this, 'shutdown'));
 44:     }
 45: 
 46:     /**
 47:      * Return the IMP_Compose:: instance.
 48:      *
 49:      * @param string $cacheid  The cache ID string.
 50:      *
 51:      * @return IMP_Compose  The singleton compose instance.
 52:      * @throws IMP_Exception
 53:      */
 54:     public function create($cacheid = null)
 55:     {
 56:         if (empty($cacheid)) {
 57:             $cacheid = strval(new Horde_Support_Randomid());
 58:         } elseif (!isset($this->_instances[$cacheid])) {
 59:             $this->_instances[$cacheid] = $GLOBALS['session']->retrieve($cacheid);
 60:         }
 61: 
 62:         if (empty($this->_instances[$cacheid])) {
 63:             $this->_instances[$cacheid] = new IMP_Compose($cacheid);
 64:         }
 65: 
 66:         return $this->_instances[$cacheid];
 67:     }
 68: 
 69:     /**
 70:      * Tasks to perform on shutdown.
 71:      */
 72:     public function shutdown()
 73:     {
 74:         global $session;
 75: 
 76:         $cache = $session->get('imp', 'compose_cache', Horde_Session::TYPE_ARRAY);
 77:         $changed = false;
 78: 
 79:         foreach ($this->_instances as $key => $val) {
 80:             switch ($val->changed) {
 81:             case 'changed':
 82:                 $session->store($val, false, $key);
 83:                 $cache[$key] = 1;
 84:                 $changed = true;
 85:                 break;
 86: 
 87:             case 'deleted':
 88:                 unset($cache[$key]);
 89:                 $session->purge($key);
 90:                 $changed = true;
 91:                 break;
 92:             }
 93: 
 94:         }
 95: 
 96:         if ($changed) {
 97:             $session->set('imp', 'compose_cache', $cache);
 98:         }
 99:     }
100: 
101: }
102: