Mbox.php

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<?php
#require_once 'Zend/Mail/Storage/Folder.php';

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

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


class Zend_Mail_Storage_Folder_Mbox extends Zend_Mail_Storage_Mbox implements Zend_Mail_Storage_Folder_Interface
{
    protected $_rootFolder;

    protected $_rootdir;

    protected $_currentFolder;

    public function __construct($params)
    {
        if (is_array($params)) {
            $params = (object)$params;
        }

        if (isset($params->filename)) {
            #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)) {
            #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;
    }

    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) {
            #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);
    }

    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)) {
            #require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception("folder $rootFolder not found");
        }
        return $currentFolder;
    }

    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()) {
                #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);
            #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);
        }
    }

    public function getCurrentFolder()
    {
        return $this->_currentFolder;
    }

    public function __sleep()
    {
        return array_merge(parent::__sleep(), array('_currentFolder', '_rootFolder', '_rootdir'));
    }

    public function __wakeup()
    {
        // if cache is stall selectFolder() rebuilds the tree on error
        parent::__wakeup();
    }
}