<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Mail

 * @subpackage Storage

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Mbox.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Mail_Storage_Folder

 */

require_once 'Zend/Mail/Storage/Folder.php';

/**

 * @see Zend_Mail_Storage_Folder_Interface

 */

require_once 'Zend/Mail/Storage/Folder/Interface.php';

/**

 * @see Zend_Mail_Storage_Mbox

 */

require_once 'Zend/Mail/Storage/Mbox.php';

/**

 * @category   Zend

 * @package    Zend_Mail

 * @subpackage Storage

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Mail_Storage_Folder_Mbox extends Zend_Mail_Storage_Mbox implements Zend_Mail_Storage_Folder_Interface

{

    /**

     * Zend_Mail_Storage_Folder root folder for folder structure

     * @var Zend_Mail_Storage_Folder

     */

    protected $_rootFolder;

    /**

     * rootdir of folder structure

     * @var string

     */

    protected $_rootdir;

    /**

     * name of current folder

     * @var string

     */

    protected $_currentFolder;

    /**

     * Create instance with parameters

     *

     * Disallowed parameters are:

     *   - filename use Zend_Mail_Storage_Mbox for a single file

     * Supported parameters are:

     *   - dirname rootdir of mbox structure

     *   - folder intial selected folder, default is 'INBOX'

     *

     * @param  $params array mail reader specific parameters

     * @throws Zend_Mail_Storage_Exception

     */

    public function __construct($params)

    {

        if (is_array($params)) {

            $params = (object)$params;

        }

        if (isset($params->filename)) {

            /**

             * @see Zend_Mail_Storage_Exception

             */

            require_once 'Zend/Mail/Storage/Exception.php';

            throw new Zend_Mail_Storage_Exception('use Zend_Mail_Storage_Mbox for a single file');

        }

        if (!isset($params->dirname) || !is_dir($params->dirname)) {

            /**

             * @see Zend_Mail_Storage_Exception

             */

            require_once 'Zend/Mail/Storage/Exception.php';

            throw new Zend_Mail_Storage_Exception('no valid dirname given in params');

        }

        $this->_rootdir = rtrim($params->dirname, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;

        $this->_buildFolderTree($this->_rootdir);

        $this->selectFolder(!empty($params->folder) ? $params->folder : 'INBOX');

        $this->_has['top']      = true;

        $this->_has['uniqueid'] = false;

    }

    /**

     * find all subfolders and mbox files for folder structure

     *

     * Result is save in Zend_Mail_Storage_Folder instances with the root in $this->_rootFolder.

     * $parentFolder and $parentGlobalName are only used internally for recursion.

     *

     * @param string $currentDir call with root dir, also used for recursion.

     * @param Zend_Mail_Storage_Folder|null $parentFolder used for recursion

     * @param string $parentGlobalName used for rescursion

     * @return null

     * @throws Zend_Mail_Storage_Exception

     */

    protected function _buildFolderTree($currentDir, $parentFolder = null, $parentGlobalName = '')

    {

        if (!$parentFolder) {

            $this->_rootFolder = new Zend_Mail_Storage_Folder('/', '/', false);

            $parentFolder = $this->_rootFolder;

        }

        $dh = @opendir($currentDir);

        if (!$dh) {

            /**

             * @see Zend_Mail_Storage_Exception

             */

            require_once 'Zend/Mail/Storage/Exception.php';

            throw new Zend_Mail_Storage_Exception("can't read dir $currentDir");

        }

        while (($entry = readdir($dh)) !== false) {

            // ignore hidden files for mbox

            if ($entry[0] == '.') {

                continue;

            }

            $absoluteEntry = $currentDir . $entry;

            $globalName = $parentGlobalName . DIRECTORY_SEPARATOR . $entry;

            if (is_file($absoluteEntry) && $this->_isMboxFile($absoluteEntry)) {

                $parentFolder->$entry = new Zend_Mail_Storage_Folder($entry, $globalName);

                continue;

            }

            if (!is_dir($absoluteEntry) /* || $entry == '.' || $entry == '..' */) {

                continue;

            }

            $folder = new Zend_Mail_Storage_Folder($entry, $globalName, false);

            $parentFolder->$entry = $folder;

            $this->_buildFolderTree($absoluteEntry . DIRECTORY_SEPARATOR, $folder, $globalName);

        }

        closedir($dh);

    }

    /**

     * get root folder or given folder

     *

     * @param string $rootFolder get folder structure for given folder, else root

     * @return Zend_Mail_Storage_Folder root or wanted folder

     * @throws Zend_Mail_Storage_Exception

     */

    public function getFolders($rootFolder = null)

    {

        if (!$rootFolder) {

            return $this->_rootFolder;

        }

        $currentFolder = $this->_rootFolder;

        $subname = trim($rootFolder, DIRECTORY_SEPARATOR);

        while ($currentFolder) {

            @list($entry, $subname) = @explode(DIRECTORY_SEPARATOR, $subname, 2);

            $currentFolder = $currentFolder->$entry;

            if (!$subname) {

                break;

            }

        }

        if ($currentFolder->getGlobalName() != DIRECTORY_SEPARATOR . trim($rootFolder, DIRECTORY_SEPARATOR)) {

            /**

             * @see Zend_Mail_Storage_Exception

             */

            require_once 'Zend/Mail/Storage/Exception.php';

            throw new Zend_Mail_Storage_Exception("folder $rootFolder not found");

        }

        return $currentFolder;

    }

    /**

     * select given folder

     *

     * folder must be selectable!

     *

     * @param Zend_Mail_Storage_Folder|string $globalName global name of folder or instance for subfolder

     * @return null

     * @throws Zend_Mail_Storage_Exception

     */

    public function selectFolder($globalName)

    {

        $this->_currentFolder = (string)$globalName;

        // getting folder from folder tree for validation

        $folder = $this->getFolders($this->_currentFolder);

        try {

            $this->_openMboxFile($this->_rootdir . $folder->getGlobalName());

        } catch(Zend_Mail_Storage_Exception $e) {

            // check what went wrong

            if (!$folder->isSelectable()) {

                /**

                 * @see Zend_Mail_Storage_Exception

                 */

                require_once 'Zend/Mail/Storage/Exception.php';

                throw new Zend_Mail_Storage_Exception("{$this->_currentFolder} is not selectable", 0, $e);

            }

            // seems like file has vanished; rebuilding folder tree - but it's still an exception

            $this->_buildFolderTree($this->_rootdir);

            /**

             * @see Zend_Mail_Storage_Exception

             */

            require_once 'Zend/Mail/Storage/Exception.php';

            throw new Zend_Mail_Storage_Exception('seems like the mbox file has vanished, I\'ve rebuild the ' .

                                                         'folder tree, search for an other folder and try again', 0, $e);

        }

    }

    /**

     * get Zend_Mail_Storage_Folder instance for current folder

     *

     * @return Zend_Mail_Storage_Folder instance of current folder

     * @throws Zend_Mail_Storage_Exception

     */

    public function getCurrentFolder()

    {

        return $this->_currentFolder;

    }

    /**

     * magic method for serialize()

     *

     * with this method you can cache the mbox class

     *

     * @return array name of variables

     */

    public function __sleep()

    {

        return array_merge(parent::__sleep(), array('_currentFolder', '_rootFolder', '_rootdir'));

    }

    /**

     * magic method for unserialize()

     *

     * with this method you can cache the mbox class

     *

     * @return null

     */

    public function __wakeup()

    {

        // if cache is stall selectFolder() rebuilds the tree on error

        parent::__wakeup();

    }

}