imap.php

希望此段源编码能给所有需要它的朋友带去快乐

            $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) {
            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');
    }
}