added toolbar; functionality includes refresh button to get back to original page, print article, email a link to the article with a personal note

git-svn-id: http://arc90labs-readability.googlecode.com/svn/trunk@31 d4e419ec-0920-11de-bbfd-a7c1bc4c261e

2 files changed, 1157 insertions, 0 deletions

diff --git a/lib/Zend/Mail/Storage/Writable/Interface.php b/lib/Zend/Mail/Storage/Writable/Interface.php
new file mode 100644
index 0000000..b49fc8e
--- /dev/null
+++ b/lib/Zend/Mail/Storage/Writable/Interface.php
@@ -0,0 +1,108 @@
+<?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) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Interface.php 9098 2008-03-30 19:29:10Z thomas $
+ */
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Mail
+ * @subpackage Storage
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+interface Zend_Mail_Storage_Writable_Interface
+{
+    /**
+     * create a new folder
+     *
+     * This method also creates parent folders if necessary. Some mail storages may restrict, which folder
+     * may be used as parent or which chars may be used in the folder name
+     *
+     * @param string                          $name         global name of folder, local name if $parentFolder is set
+     * @param string|Zend_Mail_Storage_Folder $parentFolder parent folder for new folder, else root folder is parent
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function createFolder($name, $parentFolder = null);
+
+    /**
+     * remove a folder
+     *
+     * @param string|Zend_Mail_Storage_Folder $name      name or instance of folder
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function removeFolder($name);
+
+    /**
+     * rename and/or move folder
+     *
+     * The new name has the same restrictions as in createFolder()
+     *
+     * @param string|Zend_Mail_Storage_Folder $oldName name or instance of folder
+     * @param string                          $newName new global name of folder
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function renameFolder($oldName, $newName);
+
+    /**
+     * append a new message to mail storage
+     *
+     * @param  string|Zend_Mail_Message|Zend_Mime_Message $message message as string or instance of message class
+     * @param  null|string|Zend_Mail_Storage_Folder       $folder  folder for new message, else current folder is taken
+     * @param  null|array                                 $flags   set flags for new message, else a default set is used
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function appendMessage($message, $folder = null, $flags = null);
+
+    /**
+     * copy an existing message
+     *
+     * @param  int                             $id     number of message
+     * @param  string|Zend_Mail_Storage_Folder $folder name or instance of targer folder
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function copyMessage($id, $folder);
+
+    /**
+     * move an existing message
+     *
+     * @param  int                             $id     number of message
+     * @param  string|Zend_Mail_Storage_Folder $folder name or instance of targer folder
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function moveMessage($id, $folder);
+
+    /**
+     * set flags for message
+     *
+     * NOTE: this method can't set the recent flag.
+     *
+     * @param  int   $id    number of message
+     * @param  array $flags new flags for message
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function setFlags($id, $flags);
+}
\ No newline at end of file
diff --git a/lib/Zend/Mail/Storage/Writable/Maildir.php b/lib/Zend/Mail/Storage/Writable/Maildir.php
new file mode 100644
index 0000000..9ba7573
--- /dev/null
+++ b/lib/Zend/Mail/Storage/Writable/Maildir.php
@@ -0,0 +1,1049 @@
+<?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) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Maildir.php 12519 2008-11-10 18:41:24Z alexander $
+ */
+
+
+/**
+ * @see Zend_Mail_Storage_Folder_Maildir
+ */
+require_once 'Zend/Mail/Storage/Folder/Maildir.php';
+
+/**
+ * @see Zend_Mail_Storage_Writable_Interface
+ */
+require_once 'Zend/Mail/Storage/Writable/Interface.php';
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Mail
+ * @subpackage Storage
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Mail_Storage_Writable_Maildir extends    Zend_Mail_Storage_Folder_Maildir
+                                         implements Zend_Mail_Storage_Writable_Interface
+{
+    // TODO: init maildir (+ constructor option create if not found)
+
+    /**
+     * use quota and size of quota if given
+     * @var bool|int
+     */
+    protected $_quota;
+    
+    /**
+     * create a new maildir
+     *
+     * If the given dir is already a valid maildir this will not fail.
+     *
+     * @param string $dir directory for the new maildir (may already exist)
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public static function initMaildir($dir)
+    {
+        if (file_exists($dir)) {
+            if (!is_dir($dir)) {
+                /**
+                 * @see Zend_Mail_Storage_Exception
+                 */
+                require_once 'Zend/Mail/Storage/Exception.php';
+                throw new Zend_Mail_Storage_Exception('maildir must be a directory if already exists');
+            }
+        } else {
+            if (!mkdir($dir)) {
+                /**
+                 * @see Zend_Mail_Storage_Exception
+                 */
+                require_once 'Zend/Mail/Storage/Exception.php';
+                $dir = dirname($dir);
+                if (!file_exists($dir)) {
+                    throw new Zend_Mail_Storage_Exception("parent $dir not found");
+                } else if (!is_dir($dir)) {
+                    throw new Zend_Mail_Storage_Exception("parent $dir not a directory");
+                } else {
+                    throw new Zend_Mail_Storage_Exception('cannot create maildir');
+                }
+            }
+        }
+        
+        foreach (array('cur', 'tmp', 'new') as $subdir) {
+            if (!@mkdir($dir . DIRECTORY_SEPARATOR . $subdir)) {
+                // ignore if dir exists (i.e. was already valid maildir or two processes try to create one)
+                if (!file_exists($dir . DIRECTORY_SEPARATOR . $subdir)) {
+                    /**
+                     * @see Zend_Mail_Storage_Exception
+                     */
+                    require_once 'Zend/Mail/Storage/Exception.php';
+                    throw new Zend_Mail_Storage_Exception('could not create subdir ' . $subdir);
+                }
+            }
+        }
+    }
+    
+    /**
+     * Create instance with parameters
+     * Additional parameters are (see parent for more):
+     *   - create if true a new maildir is create if none exists
+     *
+     * @param  $params array mail reader specific parameters
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function __construct($params) {
+        if (is_array($params)) {
+            $params = (object)$params;
+        }
+        
+        if (!empty($params->create) && isset($params->dirname) && !file_exists($params->dirname . DIRECTORY_SEPARATOR . 'cur')) {
+            self::initMaildir($params->dirname);
+        }
+        
+        parent::__construct($params);
+    }
+
+    /**
+     * create a new folder
+     *
+     * This method also creates parent folders if necessary. Some mail storages may restrict, which folder
+     * may be used as parent or which chars may be used in the folder name
+     *
+     * @param   string                          $name         global name of folder, local name if $parentFolder is set
+     * @param   string|Zend_Mail_Storage_Folder $parentFolder parent folder for new folder, else root folder is parent
+     * @return  string only used internally (new created maildir)
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    public function createFolder($name, $parentFolder = null)
+    {
+        if ($parentFolder instanceof Zend_Mail_Storage_Folder) {
+            $folder = $parentFolder->getGlobalName() . $this->_delim . $name;
+        } else if ($parentFolder != null) {
+            $folder = rtrim($parentFolder, $this->_delim) . $this->_delim . $name;
+        } else {
+            $folder = $name;
+        }
+
+        $folder = trim($folder, $this->_delim);
+
+        // first we check if we try to create a folder that does exist
+        $exists = null;
+        try {
+            $exists = $this->getFolders($folder);
+        } catch (Zend_Mail_Exception $e) {
+            // ok
+        }
+        if ($exists) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('folder already exists');
+        }
+
+        if (strpos($folder, $this->_delim . $this->_delim) !== false) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('invalid name - folder parts may not be empty');
+        }
+
+        if (strpos($folder, 'INBOX' . $this->_delim) === 0) {
+            $folder = substr($folder, 6);
+        }
+
+        $fulldir = $this->_rootdir . '.' . $folder;
+
+        // check if we got tricked and would create a dir outside of the rootdir or not as direct child
+        if (strpos($folder, DIRECTORY_SEPARATOR) !== false || strpos($folder, '/') !== false
+            || dirname($fulldir) . DIRECTORY_SEPARATOR != $this->_rootdir) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('invalid name - no directory seprator allowed in folder name');
+        }
+
+        // has a parent folder?
+        $parent = null;
+        if (strpos($folder, $this->_delim)) {
+            // let's see if the parent folder exists
+            $parent = substr($folder, 0, strrpos($folder, $this->_delim));
+            try {
+                $this->getFolders($parent);
+            } catch (Zend_Mail_Exception $e) {
+                // does not - create parent folder
+                $this->createFolder($parent);
+            }
+        }
+
+        if (!@mkdir($fulldir) || !@mkdir($fulldir . DIRECTORY_SEPARATOR . 'cur')) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('error while creating new folder, may be created incompletly');
+        }
+
+        mkdir($fulldir . DIRECTORY_SEPARATOR . 'new');
+        mkdir($fulldir . DIRECTORY_SEPARATOR . 'tmp');
+
+        $localName = $parent ? substr($folder, strlen($parent) + 1) : $folder;
+        $this->getFolders($parent)->$localName = new Zend_Mail_Storage_Folder($localName, $folder, true);
+
+        return $fulldir;
+    }
+
+    /**
+     * remove a folder
+     *
+     * @param   string|Zend_Mail_Storage_Folder $name      name or instance of folder
+     * @return  null
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    public function removeFolder($name)
+    {
+        // TODO: This could fail in the middle of the task, which is not optimal.
+        // But there is no defined standard way to mark a folder as removed and there is no atomar fs-op
+        // to remove a directory. Also moving the folder to a/the trash folder is not possible, as
+        // all parent folders must be created. What we could do is add a dash to the front of the
+        // directory name and it should be ignored as long as other processes obey the standard.
+
+        if ($name instanceof Zend_Mail_Storage_Folder) {
+            $name = $name->getGlobalName();
+        }
+
+        $name = trim($name, $this->_delim);
+        if (strpos($name, 'INBOX' . $this->_delim) === 0) {
+            $name = substr($name, 6);
+        }
+
+        // check if folder exists and has no children
+        if (!$this->getFolders($name)->isLeaf()) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('delete children first');
+        }
+
+        if ($name == 'INBOX' || $name == DIRECTORY_SEPARATOR || $name == '/') {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('wont delete INBOX');
+        }
+
+        if ($name == $this->getCurrentFolder()) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('wont delete selected folder');
+        }
+
+        foreach (array('tmp', 'new', 'cur', '.') as $subdir) {
+            $dir = $this->_rootdir . '.' . $name . DIRECTORY_SEPARATOR . $subdir;
+            if (!file_exists($dir)) {
+                continue;
+            }
+            $dh = opendir($dir);
+            if (!$dh) {
+                /**
+                 * @see Zend_Mail_Storage_Exception
+                 */
+                require_once 'Zend/Mail/Storage/Exception.php';
+                throw new Zend_Mail_Storage_Exception("error opening $subdir");
+            }
+            while (($entry = readdir($dh)) !== false) {
+                if ($entry == '.' || $entry == '..') {
+                    continue;
+                }
+                if (!unlink($dir . DIRECTORY_SEPARATOR . $entry)) {
+                    /**
+                     * @see Zend_Mail_Storage_Exception
+                     */
+                    require_once 'Zend/Mail/Storage/Exception.php';
+                    throw new Zend_Mail_Storage_Exception("error cleaning $subdir");
+                }
+            }
+            closedir($dh);
+            if ($subdir !== '.') {
+                if (!rmdir($dir)) {
+                    /**
+                     * @see Zend_Mail_Storage_Exception
+                     */
+                    require_once 'Zend/Mail/Storage/Exception.php';
+                    throw new Zend_Mail_Storage_Exception("error removing $subdir");
+                }
+            }
+        }
+
+        if (!rmdir($this->_rootdir . '.' . $name)) {
+            // at least we should try to make it a valid maildir again
+            mkdir($this->_rootdir . '.' . $name . DIRECTORY_SEPARATOR . 'cur');
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception("error removing maindir");
+        }
+
+        $parent = strpos($name, $this->_delim) ? substr($name, 0, strrpos($name, $this->_delim)) : null;
+        $localName = $parent ? substr($name, strlen($parent) + 1) : $name;
+        unset($this->getFolders($parent)->$localName);
+    }
+
+    /**
+     * rename and/or move folder
+     *
+     * The new name has the same restrictions as in createFolder()
+     *
+     * @param   string|Zend_Mail_Storage_Folder $oldName name or instance of folder
+     * @param   string                          $newName new global name of folder
+     * @return  null
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    public function renameFolder($oldName, $newName)
+    {
+        // TODO: This is also not atomar and has similar problems as removeFolder()
+
+        if ($oldName instanceof Zend_Mail_Storage_Folder) {
+            $oldName = $oldName->getGlobalName();
+        }
+
+        $oldName = trim($oldName, $this->_delim);
+        if (strpos($oldName, 'INBOX' . $this->_delim) === 0) {
+            $oldName = substr($oldName, 6);
+        }
+
+        $newName = trim($newName, $this->_delim);
+        if (strpos($newName, 'INBOX' . $this->_delim) === 0) {
+            $newName = substr($newName, 6);
+        }
+
+        if (strpos($newName, $oldName . $this->_delim) === 0) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('new folder cannot be a child of old folder');
+        }
+
+        // check if folder exists and has no children
+        $folder = $this->getFolders($oldName);
+
+        if ($oldName == 'INBOX' || $oldName == DIRECTORY_SEPARATOR || $oldName == '/') {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('wont rename INBOX');
+        }
+
+        if ($oldName == $this->getCurrentFolder()) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('wont rename selected folder');
+        }
+
+        $newdir = $this->createFolder($newName);
+
+        if (!$folder->isLeaf()) {
+            foreach ($folder as $k => $v) {
+                $this->renameFolder($v->getGlobalName(), $newName . $this->_delim . $k);
+            }
+        }
+
+        $olddir = $this->_rootdir . '.' . $folder;
+        foreach (array('tmp', 'new', 'cur') as $subdir) {
+            $subdir = DIRECTORY_SEPARATOR . $subdir;
+            if (!file_exists($olddir . $subdir)) {
+                continue;
+            }
+            // using copy or moving files would be even better - but also much slower
+            if (!rename($olddir . $subdir, $newdir . $subdir)) {
+                /**
+                 * @see Zend_Mail_Storage_Exception
+                 */
+                require_once 'Zend/Mail/Storage/Exception.php';
+                throw new Zend_Mail_Storage_Exception('error while moving ' . $subdir);
+            }
+        }
+        // create a dummy if removing fails - otherwise we can't read it next time
+        mkdir($olddir . DIRECTORY_SEPARATOR . 'cur');
+        $this->removeFolder($oldName);
+    }
+
+    /**
+     * create a uniqueid for maildir filename
+     *
+     * This is nearly the format defined in the maildir standard. The microtime() call should already
+     * create a uniqueid, the pid is for multicore/-cpu machine that manage to call this function at the
+     * exact same time, and uname() gives us the hostname for multiple machines accessing the same storage.
+     *
+     * If someone disables posix we create a random number of the same size, so this method should also
+     * work on Windows - if you manage to get maildir working on Windows.
+     * Microtime could also be disabled, altough I've never seen it.
+     *
+     * @return string new uniqueid
+     */
+    protected function _createUniqueId()
+    {
+        $id = '';
+        $id .= function_exists('microtime') ? microtime(true) : (time() . ' ' . rand(0, 100000));
+        $id .= '.' . (function_exists('posix_getpid') ? posix_getpid() : rand(50, 65535));
+        $id .= '.' . php_uname('n');
+
+        return $id;
+    }
+
+    /**
+     * open a temporary maildir file
+     *
+     * makes sure tmp/ exists and create a file with a unique name
+     * you should close the returned filehandle!
+     *
+     * @param   string $folder name of current folder without leading .
+     * @return  array array('dirname' => dir of maildir folder, 'uniq' => unique id, 'filename' => name of create file
+     *                     'handle'  => file opened for writing)
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    protected function _createTmpFile($folder = 'INBOX')
+    {
+        if ($folder == 'INBOX') {
+            $tmpdir = $this->_rootdir . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
+        } else {
+            $tmpdir = $this->_rootdir . '.' . $folder . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
+        }
+        if (!file_exists($tmpdir)) {
+            if (!mkdir($tmpdir)) {
+                /**
+                 * @see Zend_Mail_Storage_Exception
+                 */
+                require_once 'Zend/Mail/Storage/Exception.php';
+                throw new Zend_Mail_Storage_Exception('problems creating tmp dir');
+            }
+        }
+
+        // we should retry to create a unique id if a file with the same name exists
+        // to avoid a script timeout we only wait 1 second (instead of 2) and stop
+        // after a defined retry count
+        // if you change this variable take into account that it can take up to $max_tries seconds
+        // normally we should have a valid unique name after the first try, we're just following the "standard" here
+        $max_tries = 5;
+        for ($i = 0; $i < $max_tries; ++$i) {
+            $uniq = $this->_createUniqueId();
+            if (!file_exists($tmpdir . $uniq)) {
+                // here is the race condition! - as defined in the standard
+                // to avoid having a long time between stat()ing the file and creating it we're opening it here
+                // to mark the filename as taken
+                $fh = fopen($tmpdir . $uniq, 'w');
+                if (!$fh) {
+                    /**
+                     * @see Zend_Mail_Storage_Exception
+                     */
+                    require_once 'Zend/Mail/Storage/Exception.php';
+                    throw new Zend_Mail_Storage_Exception('could not open temp file');
+                }
+                break;
+            }
+            sleep(1);
+        }
+
+        if (!$fh) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception("tried $max_tries unique ids for a temp file, but all were taken"
+                                                . ' - giving up');
+        }
+
+        return array('dirname' => $this->_rootdir . '.' . $folder, 'uniq' => $uniq, 'filename' => $tmpdir . $uniq,
+                     'handle' => $fh);
+    }
+
+    /**
+     * create an info string for filenames with given flags
+     *
+     * @param   array $flags wanted flags, with the reference you'll get the set flags with correct key (= char for flag)
+     * @return  string info string for version 2 filenames including the leading colon
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    protected function _getInfoString(&$flags)
+    {
+        // accessing keys is easier, faster and it removes duplicated flags
+        $wanted_flags = array_flip($flags);
+        if (isset($wanted_flags[Zend_Mail_Storage::FLAG_RECENT])) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('recent flag may not be set');
+        }
+
+        $info = ':2,';
+        $flags = array();
+        foreach (Zend_Mail_Storage_Maildir::$_knownFlags as $char => $flag) {
+            if (!isset($wanted_flags[$flag])) {
+                continue;
+            }
+            $info .= $char;
+            $flags[$char] = $flag;
+            unset($wanted_flags[$flag]);
+        }
+
+        if (!empty($wanted_flags)) {
+            $wanted_flags = implode(', ', array_keys($wanted_flags));
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('unknown flag(s): ' . $wanted_flags);
+        }
+
+        return $info;
+    }
+
+    /**
+     * append a new message to mail storage
+     *
+     * @param   string|stream                              $message message as string or stream resource
+     * @param   null|string|Zend_Mail_Storage_Folder       $folder  folder for new message, else current folder is taken
+     * @param   null|array                                 $flags   set flags for new message, else a default set is used
+     * @param   bool                                       $recent  handle this mail as if recent flag has been set,
+     *                                                              should only be used in delivery
+     * @throws  Zend_Mail_Storage_Exception
+     */
+     // not yet * @param string|Zend_Mail_Message|Zend_Mime_Message $message message as string or instance of message class
+
+    public function appendMessage($message, $folder = null, $flags = null, $recent = false)
+    {
+        if ($this->_quota && $this->checkQuota()) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('storage is over quota!');            
+        }
+
+        if ($folder === null) {
+            $folder = $this->_currentFolder;
+        }
+
+        if (!($folder instanceof Zend_Mail_Storage_Folder)) {
+            $folder = $this->getFolders($folder);
+        }
+
+        if ($flags === null) {
+            $flags = array(Zend_Mail_Storage::FLAG_SEEN);
+        }
+        $info = $this->_getInfoString($flags);
+        $temp_file = $this->_createTmpFile($folder->getGlobalName());
+
+        // TODO: handle class instances for $message
+        if (is_resource($message) && get_resource_type($message) == 'stream') {
+            stream_copy_to_stream($message, $temp_file['handle']);
+        } else {
+            fputs($temp_file['handle'], $message);
+        }
+        fclose($temp_file['handle']);
+
+        // we're adding the size to the filename for maildir++
+        $size = filesize($temp_file['filename']);
+        if ($size !== false) {
+            $info = ',S=' . $size . $info;
+        }
+        $new_filename = $temp_file['dirname'] . DIRECTORY_SEPARATOR;
+        $new_filename .= $recent ? 'new' : 'cur';
+        $new_filename .= DIRECTORY_SEPARATOR . $temp_file['uniq'] . $info;
+
+        // we're throwing any exception after removing our temp file and saving it to this variable instead
+        $exception = null;
+
+        if (!link($temp_file['filename'], $new_filename)) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            $exception = new Zend_Mail_Storage_Exception('cannot link message file to final dir');
+        }
+        @unlink($temp_file['filename']);
+
+        if ($exception) {
+            throw $exception;
+        }
+
+        $this->_files[] = array('uniq'     => $temp_file['uniq'],
+                                'flags'    => $flags,
+                                'filename' => $new_filename);
+        if ($this->_quota) {
+            $this->_addQuotaEntry((int)$size, 1);
+        }
+    }
+
+    /**
+     * copy an existing message
+     *
+     * @param   int                             $id     number of message
+     * @param   string|Zend_Mail_Storage_Folder $folder name or instance of targer folder
+     * @return  null
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    public function copyMessage($id, $folder)
+    {
+        if ($this->_quota && $this->checkQuota()) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('storage is over quota!');            
+        }
+    
+        if (!($folder instanceof Zend_Mail_Storage_Folder)) {
+            $folder = $this->getFolders($folder);
+        }
+
+        $filedata = $this->_getFileData($id);
+        $old_file = $filedata['filename'];
+        $flags = $filedata['flags'];
+
+        // copied message can't be recent
+        while (($key = array_search(Zend_Mail_Storage::FLAG_RECENT, $flags)) !== false) {
+            unset($flags[$key]);
+        }
+        $info = $this->_getInfoString($flags);
+
+        // we're creating the copy as temp file before moving to cur/
+        $temp_file = $this->_createTmpFile($folder->getGlobalName());
+        // we don't write directly to the file
+        fclose($temp_file['handle']);
+
+        // we're adding the size to the filename for maildir++
+        $size = filesize($old_file);
+        if ($size !== false) {
+            $info = ',S=' . $size . $info;
+        }
+
+        $new_file = $temp_file['dirname'] . DIRECTORY_SEPARATOR . 'cur' . DIRECTORY_SEPARATOR . $temp_file['uniq'] . $info;
+
+        // we're throwing any exception after removing our temp file and saving it to this variable instead
+        $exception = null;
+
+        if (!copy($old_file, $temp_file['filename'])) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            $exception = new Zend_Mail_Storage_Exception('cannot copy message file');
+        } else if (!link($temp_file['filename'], $new_file)) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            $exception = new Zend_Mail_Storage_Exception('cannot link message file to final dir');
+        }
+        @unlink($temp_file['filename']);
+
+        if ($exception) {
+            throw $exception;
+        }
+
+        if ($folder->getGlobalName() == $this->_currentFolder
+            || ($this->_currentFolder == 'INBOX' && $folder->getGlobalName() == '/')) {
+            $this->_files[] = array('uniq'     => $temp_file['uniq'],
+                                    'flags'    => $flags,
+                                    'filename' => $new_file);
+        }
+        
+        if ($this->_quota) {
+            $this->_addQuotaEntry((int)$size, 1);
+        }
+    }
+
+    /**
+     * move an existing message
+     *
+     * @param  int                             $id     number of message
+     * @param  string|Zend_Mail_Storage_Folder $folder name or instance of targer folder
+     * @return null
+     * @throws Zend_Mail_Storage_Exception
+     */
+    public function moveMessage($id, $folder) {
+        if (!($folder instanceof Zend_Mail_Storage_Folder)) {
+            $folder = $this->getFolders($folder);
+        }
+        
+        if ($folder->getGlobalName() == $this->_currentFolder
+            || ($this->_currentFolder == 'INBOX' && $folder->getGlobalName() == '/')) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('target is current folder');
+        }
+        
+        $filedata = $this->_getFileData($id);
+        $old_file = $filedata['filename'];
+        $flags = $filedata['flags'];
+
+        // moved message can't be recent
+        while (($key = array_search(Zend_Mail_Storage::FLAG_RECENT, $flags)) !== false) {
+            unset($flags[$key]);
+        }
+        $info = $this->_getInfoString($flags);
+
+        // reserving a new name
+        $temp_file = $this->_createTmpFile($folder->getGlobalName());
+        fclose($temp_file['handle']);
+
+        // we're adding the size to the filename for maildir++
+        $size = filesize($old_file);
+        if ($size !== false) {
+            $info = ',S=' . $size . $info;
+        }
+
+        $new_file = $temp_file['dirname'] . DIRECTORY_SEPARATOR . 'cur' . DIRECTORY_SEPARATOR . $temp_file['uniq'] . $info;
+
+        // we're throwing any exception after removing our temp file and saving it to this variable instead
+        $exception = null;
+
+        if (!rename($old_file, $new_file)) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            $exception = new Zend_Mail_Storage_Exception('cannot move message file');
+        }
+        @unlink($temp_file['filename']);
+
+        if ($exception) {
+            throw $exception;
+        }
+
+        unset($this->_files[$id - 1]);
+        // remove the gap
+        $this->_files = array_values($this->_files);
+    }
+
+
+    /**
+     * set flags for message
+     *
+     * NOTE: this method can't set the recent flag.
+     *
+     * @param   int   $id    number of message
+     * @param   array $flags new flags for message
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    public function setFlags($id, $flags)
+    {
+        $info = $this->_getInfoString($flags);
+        $filedata = $this->_getFileData($id);
+
+        // NOTE: double dirname to make sure we always move to cur. if recent flag has been set (message is in new) it will be moved to cur.
+        $new_filename = dirname(dirname($filedata['filename'])) . DIRECTORY_SEPARATOR . 'cur' . DIRECTORY_SEPARATOR . "$filedata[uniq]$info";
+
+        if (!@rename($filedata['filename'], $new_filename)) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('cannot rename file');
+        }
+
+        $filedata['flags']    = $flags;
+        $filedata['filename'] = $new_filename;
+
+        $this->_files[$id - 1] = $filedata;
+    }
+
+
+    /**
+     * stub for not supported message deletion
+     *
+     * @return  null
+     * @throws  Zend_Mail_Storage_Exception
+     */
+    public function removeMessage($id)
+    {
+        $filename = $this->_getFileData($id, 'filename');
+        
+        if ($this->_quota) {
+            $size = filesize($filename);
+        }
+        
+        if (!@unlink($filename)) {
+            /**
+             * @see Zend_Mail_Storage_Exception
+             */
+            require_once 'Zend/Mail/Storage/Exception.php';
+            throw new Zend_Mail_Storage_Exception('cannot remove message');
+        }
+        unset($this->_files[$id - 1]);
+        // remove the gap
+        $this->_files = array_values($this->_files);
+        if ($this->_quota) {
+            $this->_addQuotaEntry(0 - (int)$size, -1);
+        }
+    }
+    
+    /**
+     * enable/disable quota and set a quota value if wanted or needed
+     *
+     * You can enable/disable quota with true/false. If you don't have
+     * a MDA or want to enforce a quota value you can also set this value
+     * here. Use array('size' => SIZE_QUOTA, 'count' => MAX_MESSAGE) do
+     * define your quota. Order of these fields does matter!
+     *
+     * @param bool|array $value new quota value
+     * @return null
+     */
+    public function setQuota($value) {
+        $this->_quota = $value;
+    }
+    
+    /**
+     * get currently set quota
+     *
+     * @see Zend_Mail_Storage_Writable_Maildir::setQuota()
+     *
+     * @return bool|array
+     */
+    public function getQuota($fromStorage = false) {
+        if ($fromStorage) {
+            $fh = @fopen($this->_rootdir . 'maildirsize', 'r');
+            if (!$fh) {
+                /**
+                 * @see Zend_Mail_Storage_Exception
+                 */
+                require_once 'Zend/Mail/Storage/Exception.php';
+                throw new Zend_Mail_Storage_Exception('cannot open maildirsize');
+            }
+            $definition = fgets($fh);
+            fclose($fh);
+            $definition = explode(',', trim($definition));
+            $quota = array();
+            foreach ($definition as $member) {
+                $key = $member[strlen($member) - 1];
+                if ($key == 'S' || $key == 'C') {
+                    $key = $key == 'C' ? 'count' : 'size';
+                }
+                $quota[$key] = substr($member, 0, -1);
+            }
+            return $quota;
+        }
+        
+        return $this->_quota;
+    }
+    
+    /**
+     * @see http://www.inter7.com/courierimap/README.maildirquota.html "Calculating maildirsize"
+     */
+    protected function _calculateMaildirsize() {
+        $timestamps = array();
+        $messages = 0;
+        $total_size = 0;
+
+        if (is_array($this->_quota)) {
+            $quota = $this->_quota;
+        } else {
+            try {
+                $quota = $this->getQuota(true);
+            } catch (Zend_Mail_Storage_Exception $e) {
+                throw new Zend_Mail_Storage_Exception('no quota defintion found');
+            }
+        }
+        
+        $folders = new RecursiveIteratorIterator($this->getFolders(), RecursiveIteratorIterator::SELF_FIRST);
+        foreach ($folders as $folder) {
+            $subdir = $folder->getGlobalName();
+            if ($subdir == 'INBOX') {
+                $subdir = '';
+            } else {
+                $subdir = '.' . $subdir;
+            }
+            if ($subdir == 'Trash') {
+                continue;
+            }
+            
+            foreach (array('cur', 'new') as $subsubdir) {
+                $dirname = $this->_rootdir . $subdir . DIRECTORY_SEPARATOR . $subsubdir . DIRECTORY_SEPARATOR;
+                if (!file_exists($dirname)) {
+                    continue;
+                }
+                // NOTE: we are using mtime instead of "the latest timestamp". The latest would be atime
+                // and as we are accessing the directory it would make the whole calculation useless.    
+                $timestamps[$dirname] = filemtime($dirname);
+
+                $dh = opendir($dirname);
+                // NOTE: Should have been checked in constructor. Not throwing an exception here, quotas will 
+                // therefore not be fully enforeced, but next request will fail anyway, if problem persists.
+                if (!$dh) {
+                    continue;
+                }
+                
+                                
+                while (($entry = readdir()) !== false) {
+                    if ($entry[0] == '.' || !is_file($dirname . $entry)) {
+                        continue;
+                    }
+                    
+                    if (strpos($entry, ',S=')) {
+                        strtok($entry, '=');
+                        $filesize = strtok(':');
+                        if (is_numeric($filesize)) {
+                            $total_size += $filesize;
+                            ++$messages;
+                            continue;
+                        }
+                    }
+                    $size = filesize($dirname . $entry);
+                    if ($size === false) {
+                        // ignore, as we assume file got removed
+                        continue;
+                    }
+                    $total_size += $size;
+                    ++$messages;
+                }
+            }
+        }
+        
+        $tmp = $this->_createTmpFile();
+        $fh = $tmp['handle'];
+        $definition = array();
+        foreach ($quota as $type => $value) {
+            if ($type == 'size' || $type == 'count') {
+                $type = $type == 'count' ? 'C' : 'S';
+            }
+            $definition[] = $value . $type;
+        }
+        $definition = implode(',', $definition);
+        fputs($fh, "$definition\n");
+        fputs($fh, "$total_size $messages\n");
+        fclose($fh);
+        rename($tmp['filename'], $this->_rootdir . 'maildirsize');
+        foreach ($timestamps as $dir => $timestamp) {
+            if ($timestamp < filemtime($dir)) {
+                unlink($this->_rootdir . 'maildirsize');
+                break;
+            }
+        }
+        
+        return array('size' => $total_size, 'count' => $messages, 'quota' => $quota);
+    }
+    
+    /**
+     * @see http://www.inter7.com/courierimap/README.maildirquota.html "Calculating the quota for a Maildir++"
+     */
+    protected function _calculateQuota($forceRecalc = false) {
+        $fh = null;
+        $total_size = 0;
+        $messages   = 0;
+        $maildirsize = '';
+        if (!$forceRecalc && file_exists($this->_rootdir . 'maildirsize') && filesize($this->_rootdir . 'maildirsize') < 5120) {
+            $fh = fopen($this->_rootdir . 'maildirsize', 'r');
+        }
+        if ($fh) {
+            $maildirsize = fread($fh, 5120);
+            if (strlen($maildirsize) >= 5120) {
+                fclose($fh);
+                $fh = null;
+                $maildirsize = '';
+            }
+        }
+        if (!$fh) {
+            $result = $this->_calculateMaildirsize();
+            $total_size = $result['size'];
+            $messages   = $result['count'];
+            $quota      = $result['quota'];
+        } else {
+            $maildirsize = explode("\n", $maildirsize);
+            if (is_array($this->_quota)) {
+                $quota = $this->_quota;
+            } else {
+                $definition = explode(',', $maildirsize[0]);
+                $quota = array();
+                foreach ($definition as $member) {
+                    $key = $member[strlen($member) - 1];
+                    if ($key == 'S' || $key == 'C') {
+                        $key = $key == 'C' ? 'count' : 'size';
+                    }
+                    $quota[$key] = substr($member, 0, -1);
+                }
+            }
+            unset($maildirsize[0]);
+            foreach ($maildirsize as $line) {
+                list($size, $count) = explode(' ', trim($line));
+                $total_size += $size;
+                $messages   += $count;
+            }
+        }
+        
+        $over_quota = false;
+        $over_quota = $over_quota || (isset($quota['size'])  && $total_size > $quota['size']); 
+        $over_quota = $over_quota || (isset($quota['count']) && $messages   > $quota['count']);
+        // NOTE: $maildirsize equals false if it wasn't set (AKA we recalculated) or it's only
+        // one line, because $maildirsize[0] gets unsetted.
+        // Also we're using local time to calculate the 15 minute offset. Touching a file just for known the
+        // local time of the file storage isn't worth the hassle.
+        if ($over_quota && ($maildirsize || filemtime($this->_rootdir . 'maildirsize') > time() - 900)) {
+            $result = $this->_calculateMaildirsize();
+            $total_size = $result['size'];
+            $messages   = $result['count'];
+            $quota      = $result['quota'];
+            $over_quota = false;
+            $over_quota = $over_quota || (isset($quota['size'])  && $total_size > $quota['size']); 
+            $over_quota = $over_quota || (isset($quota['count']) && $messages   > $quota['count']);
+        }
+        
+        if ($fh) {
+            // TODO is there a safe way to keep the handle open for writing?
+            fclose($fh);
+        }
+        
+        return array('size' => $total_size, 'count' => $messages, 'quota' => $quota, 'over_quota' => $over_quota);
+    }
+    
+    protected function _addQuotaEntry($size, $count = 1) {
+        if (!file_exists($this->_rootdir . 'maildirsize')) {
+            // TODO: should get file handler from _calculateQuota
+        }
+        $size = (int)$size;
+        $count = (int)$count;
+        file_put_contents($this->_rootdir . 'maildirsize', "$size $count\n", FILE_APPEND);
+    }
+    
+    /**
+     * check if storage is currently over quota
+     *
+     * @param bool $detailedResponse return known data of quota and current size and message count @see _calculateQuota()
+     * @return bool|array over quota state or detailed response
+     */
+    public function checkQuota($detailedResponse = false, $forceRecalc = false) {
+        $result = $this->_calculateQuota($forceRecalc);
+        return $detailedResponse ? $result : $result['over_quota'];
+    }
+}