Maildir.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/Maildir.php';


class Zend_Mail_Storage_Folder_Maildir extends Zend_Mail_Storage_Maildir implements Zend_Mail_Storage_Folder_Interface
{
    protected $_rootFolder;

    protected $_rootdir;

    protected $_currentFolder;

    protected $_delim;

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

        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;

        $this->_delim = isset($params->delim) ? $params->delim : '.';

        $this->_buildFolderTree();
        $this->selectFolder(!empty($params->folder) ? $params->folder : 'INBOX');
        $this->_has['top'] = true;
        $this->_has['flags'] = true;
    }

    protected function _buildFolderTree()
    {
        $this->_rootFolder = new Zend_Mail_Storage_Folder('/', '/', false);
        $this->_rootFolder->INBOX = new Zend_Mail_Storage_Folder('INBOX', 'INBOX', true);

        $dh = @opendir($this->_rootdir);
        if (!$dh) {
            #require_once 'Zend/Mail/Storage/Exception.php';
            throw new Zend_Mail_Storage_Exception("can't read folders in maildir");
        }
        $dirs = array();
        while (($entry = readdir($dh)) !== false) {
            // maildir++ defines folders must start with .
            if ($entry[0] != '.' || $entry == '.' || $entry == '..') {
                continue;
            }
            if ($this->_isMaildir($this->_rootdir . $entry)) {
                $dirs[] = $entry;
            }
        }
        closedir($dh);

        sort($dirs);
        $stack = array(null);
        $folderStack = array(null);
        $parentFolder = $this->_rootFolder;
        $parent = '.';

        foreach ($dirs as $dir) {
            do {
                if (strpos($dir, $parent) === 0) {
                    $local = substr($dir, strlen($parent));
                    if (strpos($local, $this->_delim) !== false) {
                        #require_once 'Zend/Mail/Storage/Exception.php';
                        throw new Zend_Mail_Storage_Exception('error while reading maildir');
                    }
                    array_push($stack, $parent);
                    $parent = $dir . $this->_delim;
                    $folder = new Zend_Mail_Storage_Folder($local, substr($dir, 1), true);
                    $parentFolder->$local = $folder;
                    array_push($folderStack, $parentFolder);
                    $parentFolder = $folder;
                    break;
                } else if ($stack) {
                    $parent = array_pop($stack);
                    $parentFolder = array_pop($folderStack);
                }
            } while ($stack);
            if (!$stack) {
                #require_once 'Zend/Mail/Storage/Exception.php';
                throw new Zend_Mail_Storage_Exception('error while reading maildir');
            }
        }
    }

    public function getFolders($rootFolder = null)
    {
        if (!$rootFolder || $rootFolder == 'INBOX') {
            return $this->_rootFolder;
        }

        // rootdir is same as INBOX in maildir
        if (strpos($rootFolder, 'INBOX' . $this->_delim) === 0) {
            $rootFolder = substr($rootFolder, 6);
        }
        $currentFolder = $this->_rootFolder;
        $subname = trim($rootFolder, $this->_delim);
        while ($currentFolder) {
            @list($entry, $subname) = @explode($this->_delim, $subname, 2);
            $currentFolder = $currentFolder->$entry;
            if (!$subname) {
                break;
            }
        }

        if ($currentFolder->getGlobalName() != rtrim($rootFolder, $this->_delim)) {
            #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 {
            $this->_openMaildir($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 maildir has vanished, I\'ve rebuild the ' .
                                                         'folder tree, search for an other folder and try again', 0, $e);
        }
    }

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