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

1 files changed, 837 insertions, 0 deletions

diff --git a/lib/Zend/Mail/Protocol/Imap.php b/lib/Zend/Mail/Protocol/Imap.php
new file mode 100644
index 0000000..eec0ff3
--- /dev/null
+++ b/lib/Zend/Mail/Protocol/Imap.php
@@ -0,0 +1,837 @@
+<?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 Protocol
+ * @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: Imap.php 12539 2008-11-11 02:47:17Z yoshida@zend.co.jp $
+ */
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Mail
+ * @subpackage Protocol
+ * @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_Protocol_Imap
+{
+    /**
+     * Default timeout in seconds for initiating session
+     */
+    const TIMEOUT_CONNECTION = 30;
+    
+    /**
+     * socket to imap server
+     * @var resource|null
+     */
+    protected $_socket;
+
+    /**
+     * counter for request tag
+     * @var int
+     */
+    protected $_tagCount = 0;
+
+    /**
+     * Public constructor
+     *
+     * @param  string   $host  hostname of IP address of IMAP server, if given connect() is called
+     * @param  int|null $port  port of IMAP server, null for default (143 or 993 for ssl)
+     * @param  bool     $ssl   use ssl? 'SSL', 'TLS' or false
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    function __construct($host = '', $port = null, $ssl = false)
+    {
+        if ($host) {
+            $this->connect($host, $port, $ssl);
+        }
+    }
+
+    /**
+     * Public destructor
+     */
+    public function __destruct()
+    {
+        $this->logout();
+    }
+
+    /**
+     * Open connection to POP3 server
+     *
+     * @param  string      $host  hostname of IP address of POP3 server
+     * @param  int|null    $port  of IMAP server, default is 143 (993 for ssl)
+     * @param  string|bool $ssl   use 'SSL', 'TLS' or false
+     * @return string welcome message
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function connect($host, $port = null, $ssl = false)
+    {
+        if ($ssl == 'SSL') {
+            $host = 'ssl://' . $host;
+        }
+
+        if ($port === null) {
+            $port = $ssl === 'SSL' ? 993 : 143;
+        }
+
+        $errno  =  0;
+        $errstr = '';
+        $this->_socket = @fsockopen($host, $port, $errno, $errstr, self::TIMEOUT_CONNECTION);
+        if (!$this->_socket) {
+            /**
+             * @see Zend_Mail_Protocol_Exception
+             */
+            require_once 'Zend/Mail/Protocol/Exception.php';
+            throw new Zend_Mail_Protocol_Exception('cannot connect to host : ' . $errno . ' : ' . $errstr);
+        }
+
+        if (!$this->_assumedNextLine('* OK')) {
+            /**
+             * @see Zend_Mail_Protocol_Exception
+             */
+            require_once 'Zend/Mail/Protocol/Exception.php';
+            throw new Zend_Mail_Protocol_Exception('host doesn\'t allow connection');
+        }
+
+        if ($ssl === 'TLS') {
+            $result = $this->requestAndResponse('STARTTLS');
+            $result = $result && stream_socket_enable_crypto($this->_socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
+            if (!$result) {
+                /**
+                 * @see Zend_Mail_Protocol_Exception
+                 */
+                require_once 'Zend/Mail/Protocol/Exception.php';
+                throw new Zend_Mail_Protocol_Exception('cannot enable TLS');
+            }
+        }
+    }
+
+    /**
+     * get the next line from socket with error checking, but nothing else
+     *
+     * @return string next line
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    protected function _nextLine()
+    {
+        $line = @fgets($this->_socket);
+        if ($line === false) {
+            /**
+             * @see Zend_Mail_Protocol_Exception
+             */
+            require_once 'Zend/Mail/Protocol/Exception.php';
+            throw new Zend_Mail_Protocol_Exception('cannot read - connection closed?');
+        }
+
+        return $line;
+    }
+
+    /**
+     * get next line and assume it starts with $start. some requests give a simple
+     * feedback so we can quickly check if we can go on.
+     *
+     * @param  string $start the first bytes we assume to be in the next line
+     * @return bool line starts with $start
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    protected function _assumedNextLine($start)
+    {
+        $line = $this->_nextLine();
+        return strpos($line, $start) === 0;
+    }
+
+    /**
+     * get next line and split the tag. that's the normal case for a response line
+     *
+     * @param  string $tag tag of line is returned by reference
+     * @return string next line
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    protected function _nextTaggedLine(&$tag)
+    {
+        $line = $this->_nextLine();
+
+        // seperate tag from line
+        list($tag, $line) = explode(' ', $line, 2);
+
+        return $line;
+    }
+
+    /**
+     * split a given line in tokens. a token is literal of any form or a list
+     *
+     * @param  string $line line to decode
+     * @return array tokens, literals are returned as string, lists as array
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    protected function _decodeLine($line)
+    {
+        $tokens = array();
+        $stack = array();
+
+        /*
+            We start to decode the response here. The unterstood tokens are:
+                literal
+                "literal" or also "lit\\er\"al"
+                {bytes}<NL>literal
+                (literals*)
+            All tokens are returned in an array. Literals in braces (the last unterstood
+            token in the list) are returned as an array of tokens. I.e. the following response:
+                "foo" baz {3}<NL>bar ("f\\\"oo" bar)
+            would be returned as:
+                array('foo', 'baz', 'bar', array('f\\\"oo', 'bar'));
+                
+            // TODO: add handling of '[' and ']' to parser for easier handling of response text 
+        */
+        //  replace any trailling <NL> including spaces with a single space
+        $line = rtrim($line) . ' ';
+        while (($pos = strpos($line, ' ')) !== false) {
+            $token = substr($line, 0, $pos);
+            while ($token[0] == '(') {
+                array_push($stack, $tokens);
+                $tokens = array();
+                $token = substr($token, 1);
+            }
+            if ($token[0] == '"') {
+                if (preg_match('%^"((.|\\\\|\\")*?)" *%', $line, $matches)) {
+                    $tokens[] = $matches[1];
+                    $line = substr($line, strlen($matches[0]));
+                    continue;
+                }
+            }
+            if ($token[0] == '{') {
+                $endPos = strpos($token, '}');
+                $chars = substr($token, 1, $endPos - 1);
+                if (is_numeric($chars)) {
+                    $token = '';
+                    while (strlen($token) < $chars) {
+                        $token .= $this->_nextLine();
+                    }
+                    $line = '';
+                    if (strlen($token) > $chars) {
+                        $line = substr($token, $chars);
+                        $token = substr($token, 0, $chars);
+                    } else {
+                        $line .= $this->_nextLine();
+                    }
+                    $tokens[] = $token;
+                    $line = trim($line) . ' ';
+                    continue;
+                }
+            }
+            if ($stack && $token[strlen($token) - 1] == ')') {
+                // closing braces are not seperated by spaces, so we need to count them
+                $braces = strlen($token);
+                $token = rtrim($token, ')');
+                // only count braces if more than one
+                $braces -= strlen($token) + 1;
+                // only add if token had more than just closing braces
+                if ($token) {
+                    $tokens[] = $token;
+                }
+                $token = $tokens;
+                $tokens = array_pop($stack);
+                // special handline if more than one closing brace
+                while ($braces-- > 0) {
+                    $tokens[] = $token;
+                    $token = $tokens;
+                    $tokens = array_pop($stack);
+                }
+            }
+            $tokens[] = $token;
+            $line = substr($line, $pos + 1);
+        }
+
+        // maybe the server forgot to send some closing braces
+        while ($stack) {
+            $child = $tokens;
+            $tokens = array_pop($stack);
+            $tokens[] = $child;
+        }
+
+        return $tokens;
+    }
+
+    /**
+     * read a response "line" (could also be more than one real line if response has {..}<NL>)
+     * and do a simple decode
+     *
+     * @param  array|string  $tokens    decoded tokens are returned by reference, if $dontParse
+     *                                  is true the unparsed line is returned here
+     * @param  string        $wantedTag check for this tag for response code. Default '*' is
+     *                                  continuation tag.
+     * @param  bool          $dontParse if true only the unparsed line is returned $tokens
+     * @return bool if returned tag matches wanted tag
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function readLine(&$tokens = array(), $wantedTag = '*', $dontParse = false)
+    {
+        $line = $this->_nextTaggedLine($tag);
+        if (!$dontParse) {
+            $tokens = $this->_decodeLine($line);
+        } else {
+            $tokens = $line;
+        }
+
+        // if tag is wanted tag we might be at the end of a multiline response
+        return $tag == $wantedTag;
+    }
+
+    /**
+     * read all lines of response until given tag is found (last line of response)
+     *
+     * @param  string       $tag       the tag of your request
+     * @param  string|array $filter    you can filter the response so you get only the
+     *                                 given response lines
+     * @param  bool         $dontParse if true every line is returned unparsed instead of
+     *                                 the decoded tokens
+     * @return null|bool|array tokens if success, false if error, null if bad request
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function readResponse($tag, $dontParse = false)
+    {
+        $lines = array();
+        while (!$this->readLine($tokens, $tag, $dontParse)) {
+            $lines[] = $tokens;
+        }
+
+        if ($dontParse) {
+            // last to chars are still needed for response code
+            $tokens = array(substr($tokens, 0, 2));
+        }
+        // last line has response code
+        if ($tokens[0] == 'OK') {
+            return $lines ? $lines : true;
+        } else if ($tokens[0] == 'NO'){
+            return false;
+        }
+        return null;
+    }
+
+    /**
+     * send a request
+     *
+     * @param  string $command your request command
+     * @param  array  $tokens  additional parameters to command, use escapeString() to prepare
+     * @param  string $tag     provide a tag otherwise an autogenerated is returned
+     * @return null
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function sendRequest($command, $tokens = array(), &$tag = null)
+    {
+        if (!$tag) {
+            ++$this->_tagCount;
+            $tag = 'TAG' . $this->_tagCount;
+        }
+
+        $line = $tag . ' ' . $command;
+
+        foreach ($tokens as $token) {
+            if (is_array($token)) {
+                if (@fputs($this->_socket, $line . ' ' . $token[0] . "\r\n") === false) {
+                    /**
+                     * @see Zend_Mail_Protocol_Exception
+                     */
+                    require_once 'Zend/Mail/Protocol/Exception.php';
+                    throw new Zend_Mail_Protocol_Exception('cannot write - connection closed?');
+                }
+                if (!$this->_assumedNextLine('+ ')) {
+                    /**
+                     * @see Zend_Mail_Protocol_Exception
+                     */
+                    require_once 'Zend/Mail/Protocol/Exception.php';
+                    throw new Zend_Mail_Protocol_Exception('cannot send literal string');
+                }
+                $line = $token[1];
+            } else {
+                $line .= ' ' . $token;
+            }
+        }
+
+        if (@fputs($this->_socket, $line . "\r\n") === false) {
+            /**
+             * @see Zend_Mail_Protocol_Exception
+             */
+            require_once 'Zend/Mail/Protocol/Exception.php';
+            throw new Zend_Mail_Protocol_Exception('cannot write - connection closed?');
+        }
+    }
+
+    /**
+     * send a request and get response at once
+     *
+     * @param  string $command   command as in sendRequest()
+     * @param  array  $tokens    parameters as in sendRequest()
+     * @param  bool   $dontParse if true unparsed lines are returned instead of tokens
+     * @return mixed response as in readResponse()
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function requestAndResponse($command, $tokens = array(), $dontParse = false)
+    {
+        $this->sendRequest($command, $tokens, $tag);
+        $response = $this->readResponse($tag, $dontParse);
+
+        return $response;
+    }
+
+    /**
+     * escape one or more literals i.e. for sendRequest
+     *
+     * @param  string|array $string the literal/-s
+     * @return string|array escape literals, literals with newline ar returned
+     *                      as array('{size}', 'string');
+     */
+    public function escapeString($string)
+    {
+        if (func_num_args() < 2) {
+            if (strpos($string, "\n") !== false) {
+                return array('{' . strlen($string) . '}', $string);
+            } else {
+                return '"' . str_replace(array('\\', '"'), array('\\\\', '\\"'), $string) . '"';
+            }
+        }
+        $result = array();
+        foreach (func_get_args() as $string) {
+            $result[] = $this->escapeString($string);
+        }
+        return $result;
+    }
+
+    /**
+     * escape a list with literals or lists
+     *
+     * @param  array $list list with literals or lists as PHP array
+     * @return string escaped list for imap
+     */
+    public function escapeList($list)
+    {
+        $result = array();
+        foreach ($list as $k => $v) {
+            if (!is_array($v)) {
+//              $result[] = $this->escapeString($v);
+                $result[] = $v;
+                continue;
+            }
+            $result[] = $this->escapeList($v);
+        }
+        return '(' . implode(' ', $result) . ')';
+    }
+
+    /**
+     * Login to IMAP server.
+     *
+     * @param  string $user      username
+     * @param  string $password  password
+     * @return bool success
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function login($user, $password)
+    {
+        return $this->requestAndResponse('LOGIN', $this->escapeString($user, $password), true);
+    }
+
+    /**
+     * logout of imap server
+     *
+     * @return bool success
+     */
+    public function logout()
+    {
+        $result = false;
+        if ($this->_socket) {
+            try {
+                $result = $this->requestAndResponse('LOGOUT', array(), true);
+            } catch (Zend_Mail_Protocol_Exception $e) {
+                // ignoring exception
+            }
+            fclose($this->_socket);
+            $this->_socket = null;
+        }
+        return $result;
+    }
+
+
+    /**
+     * Get capabilities from IMAP server
+     *
+     * @return array list of capabilities
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function capability()
+    {
+        $response = $this->requestAndResponse('CAPABILITY');
+
+        if (!$response) {
+            return $response;
+        }
+
+        $capabilities = array();
+        foreach ($response as $line) {
+            $capabilities = array_merge($capabilities, $line);
+        }
+        return $capabilities;
+    }
+
+    /**
+     * Examine and select have the same response. The common code for both
+     * is in this method
+     *
+     * @param  string $command can be 'EXAMINE' or 'SELECT' and this is used as command
+     * @param  string $box which folder to change to or examine
+     * @return bool|array false if error, array with returned information
+     *                    otherwise (flags, exists, recent, uidvalidity)
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function examineOrSelect($command = 'EXAMINE', $box = 'INBOX')
+    {
+        $this->sendRequest($command, array($this->escapeString($box)), $tag);
+
+        $result = array();
+        while (!$this->readLine($tokens, $tag)) {
+            if ($tokens[0] == 'FLAGS') {
+                array_shift($tokens);
+                $result['flags'] = $tokens;
+                continue;
+            }
+            switch ($tokens[1]) {
+                case 'EXISTS':
+                case 'RECENT':
+                    $result[strtolower($tokens[1])] = $tokens[0];
+                    break;
+                case '[UIDVALIDITY':
+                    $result['uidvalidity'] = (int)$tokens[2];
+                    break;
+                default:
+                    // ignore
+            }
+        }
+
+        if ($tokens[0] != 'OK') {
+            return false;
+        }
+        return $result;
+    }
+
+    /**
+     * change folder
+     *
+     * @param  string $box change to this folder
+     * @return bool|array see examineOrselect()
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function select($box = 'INBOX')
+    {
+        return $this->examineOrSelect('SELECT', $box);
+    }
+
+    /**
+     * examine folder
+     *
+     * @param  string $box examine this folder
+     * @return bool|array see examineOrselect()
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function examine($box = 'INBOX')
+    {
+        return $this->examineOrSelect('EXAMINE', $box);
+    }
+
+    /**
+     * fetch one or more items of one or more messages
+     *
+     * @param  string|array $items items to fetch from message(s) as string (if only one item)
+     *                             or array of strings
+     * @param  int          $from  message for items or start message if $to !== null
+     * @param  int|null     $to    if null only one message ($from) is fetched, else it's the
+     *                             last message, INF means last message avaible
+     * @return string|array if only one item of one message is fetched it's returned as string
+     *                      if items of one message are fetched it's returned as (name => value)
+     *                      if one items of messages are fetched it's returned as (msgno => value)
+     *                      if items of messages are fetchted it's returned as (msgno => (name => value))
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function fetch($items, $from, $to = null)
+    {
+        if (is_array($from)) {
+            $set = implode(',', $from);
+        } else if ($to === null) {
+            $set = (int)$from;
+        } else if ($to === INF) {
+            $set = (int)$from . ':*';
+        } else {
+            $set = (int)$from . ':' . (int)$to;
+        }
+
+        $items = (array)$items;
+        $itemList = $this->escapeList($items);
+
+        $this->sendRequest('FETCH', array($set, $itemList), $tag);
+
+        $result = array();
+        while (!$this->readLine($tokens, $tag)) {
+            // ignore other responses
+            if ($tokens[1] != 'FETCH') {
+                continue;
+            }
+            // ignore other messages
+            if ($to === null && !is_array($from) && $tokens[0] != $from) {
+                continue;
+            }
+            // if we only want one item we return that one directly
+            if (count($items) == 1) {
+                if ($tokens[2][0] == $items[0]) {
+                    $data = $tokens[2][1];
+                } else {
+                    // maybe the server send an other field we didn't wanted
+                    $count = count($tokens[2]);
+                    // we start with 2, because 0 was already checked
+                    for ($i = 2; $i < $count; $i += 2) {
+                        if ($tokens[2][$i] != $items[0]) {
+                            continue;
+                        }
+                        $data = $tokens[2][$i + 1];
+                        break;
+                    }
+                }
+            } else {
+                $data = array();
+                while (key($tokens[2]) !== null) {
+                    $data[current($tokens[2])] = next($tokens[2]);
+                    next($tokens[2]);
+                }
+            }
+            // if we want only one message we can ignore everything else and just return
+            if ($to === null && !is_array($from) && $tokens[0] == $from) {
+                // we still need to read all lines
+                while (!$this->readLine($tokens, $tag));
+                return $data;
+            }
+            $result[$tokens[0]] = $data;
+        }
+
+        if ($to === null && !is_array($from)) {
+            /**
+             * @see Zend_Mail_Protocol_Exception
+             */
+            require_once 'Zend/Mail/Protocol/Exception.php';
+            throw new Zend_Mail_Protocol_Exception('the single id was not found in response');
+        }
+
+        return $result;
+    }
+
+    /**
+     * get mailbox list
+     *
+     * this method can't be named after the IMAP command 'LIST', as list is a reserved keyword
+     *
+     * @param  string $reference mailbox reference for list
+     * @param  string $mailbox   mailbox name match with wildcards
+     * @return array mailboxes that matched $mailbox as array(globalName => array('delim' => .., 'flags' => ..))
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function listMailbox($reference = '', $mailbox = '*')
+    {
+        $result = array();
+        $list = $this->requestAndResponse('LIST', $this->escapeString($reference, $mailbox));
+        if (!$list || $list === true) {
+            return $result;
+        }
+
+        foreach ($list as $item) {
+            if (count($item) != 4 || $item[0] != 'LIST') {
+                continue;
+            }
+            $result[$item[3]] = array('delim' => $item[2], 'flags' => $item[1]);
+        }
+
+        return $result;
+    }
+
+    /**
+     * set flags
+     *
+     * @param  array       $flags  flags to set, add or remove - see $mode
+     * @param  int         $from   message for items or start message if $to !== null
+     * @param  int|null    $to     if null only one message ($from) is fetched, else it's the
+     *                             last message, INF means last message avaible
+     * @param  string|null $mode   '+' to add flags, '-' to remove flags, everything else sets the flags as given
+     * @param  bool        $silent if false the return values are the new flags for the wanted messages
+     * @return bool|array new flags if $silent is false, else true or false depending on success
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function store(array $flags, $from, $to = null, $mode = null, $silent = true)
+    {
+        $item = 'FLAGS';
+        if ($mode == '+' || $mode == '-') {
+            $item = $mode . $item;
+        }
+        if ($silent) {
+            $item .= '.SILENT';
+        }
+
+        $flags = $this->escapeList($flags);
+        $set = (int)$from;
+        if ($to != null) {
+            $set .= ':' . ($to == INF ? '*' : (int)$to);
+        }
+
+        $result = $this->requestAndResponse('STORE', array($set, $item, $flags), $silent);
+
+        if ($silent) {
+            return $result ? true : false;
+        }
+
+        $tokens = $result;
+        $result = array();
+        foreach ($tokens as $token) {
+            if ($token[1] != 'FETCH' || $token[2][0] != 'FLAGS') {
+                continue;
+            }
+            $result[$token[0]] = $token[2][1];
+        }
+
+        return $result;
+    }
+
+    /**
+     * append a new message to given folder
+     *
+     * @param string $folder  name of target folder
+     * @param string $message full message content
+     * @param array  $flags   flags for new message
+     * @param string $date    date for new message
+     * @return bool success
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function append($folder, $message, $flags = null, $date = null)
+    {
+        $tokens = array();
+        $tokens[] = $this->escapeString($folder);
+        if ($flags !== null) {
+            $tokens[] = $this->escapeList($flags);
+        }
+        if ($date !== null) {
+            $tokens[] = $this->escapeString($date);
+        }
+        $tokens[] = $this->escapeString($message);
+
+        return $this->requestAndResponse('APPEND', $tokens, true);
+    }
+
+    /**
+     * copy message set from current folder to other folder
+     *
+     * @param string   $folder destination folder
+     * @param int|null $to     if null only one message ($from) is fetched, else it's the
+     *                         last message, INF means last message avaible
+     * @return bool success
+     * @throws Zend_Mail_Protocol_Exception
+     */
+    public function copy($folder, $from, $to = null)
+    {
+        $set = (int)$from;
+        if ($to != null) {
+            $set .= ':' . ($to == INF ? '*' : (int)$to);
+        }
+
+        return $this->requestAndResponse('COPY', array($set, $this->escapeString($folder)), true);
+    }
+
+    /**
+     * create a new folder (and parent folders if needed)
+     *
+     * @param string $folder folder name
+     * @return bool success
+     */
+    public function create($folder)
+    {
+        return $this->requestAndResponse('CREATE', array($this->escapeString($folder)), true);
+    }
+
+    /**
+     * rename an existing folder
+     *
+     * @param string $old old name
+     * @param string $new new name
+     * @return bool success
+     */
+    public function rename($old, $new)
+    {
+        return $this->requestAndResponse('RENAME', $this->escapeString($old, $new), true);
+    }
+
+    /**
+     * remove a folder
+     *
+     * @param string $folder folder name
+     * @return bool success
+     */
+    public function delete($folder)
+    {
+        return $this->requestAndResponse('DELETE', array($this->escapeString($folder)), true);
+    }
+
+    /**
+     * permanently remove messages
+     *
+     * @return bool success
+     */
+    public function expunge()
+    {
+        // TODO: parse response?
+        return $this->requestAndResponse('EXPUNGE');
+    }
+
+    /**
+     * send noop
+     *
+     * @return bool success
+     */
+    public function noop()
+    {
+        // TODO: parse response
+        return $this->requestAndResponse('NOOP');
+    }
+
+    /**
+     * do a search request
+     *
+     * This method is currently marked as internal as the API might change and is not
+     * safe if you don't take precautions.
+     *
+     * @internal
+     * @return array message ids
+     */
+    public function search(array $params)
+    {
+        $response = $this->requestAndResponse('SEARCH', $params);
+        if (!$response) {
+            return $response;
+        }
+        
+        foreach ($response as $ids) {
+            if ($ids[0] == 'SEARCH') {
+                array_shift($ids);
+                return $ids;
+            }
+        }
+        return array();
+    }
+
+}