roundcubemail/program/steps/mail/compose.inc

<?php

/*
 +-----------------------------------------------------------------------+
 | program/steps/mail/compose.inc                                        |
 |                                                                       |
 | This file is part of the Roundcube Webmail client                     |
 | Copyright (C) 2005-2012, The Roundcube Dev Team                       |
 |                                                                       |
 | Licensed under the GNU General Public License version 3 or            |
 | any later version with exceptions for skins & plugins.                |
 | See the README file for a full license statement.                     |
 |                                                                       |
 | PURPOSE:                                                              |
 |   Compose a new mail message with all headers and attachments         |
 |                                                                       |
 +-----------------------------------------------------------------------+
 | Author: Thomas Bruederli <roundcube@gmail.com>                        |
 +-----------------------------------------------------------------------+
*/

// define constants for message compose mode
define('RCUBE_COMPOSE_REPLY', 'reply');
define('RCUBE_COMPOSE_FORWARD', 'forward');
define('RCUBE_COMPOSE_DRAFT', 'draft');
define('RCUBE_COMPOSE_EDIT', 'edit');

$MESSAGE_FORM = null;
$COMPOSE_ID   = get_input_value('_id', RCUBE_INPUT_GET);
$COMPOSE      = null;

if ($COMPOSE_ID && $_SESSION['compose_data_'.$COMPOSE_ID])
  $COMPOSE =& $_SESSION['compose_data_'.$COMPOSE_ID];

// give replicated session storage some time to synchronize
$retries = 0;
while ($COMPOSE_ID && !is_array($COMPOSE) && $RCMAIL->db->is_replicated() && $retries++ < 5) {
  usleep(500000);
  $RCMAIL->session->reload();
  if ($_SESSION['compose_data_'.$COMPOSE_ID])
    $COMPOSE =& $_SESSION['compose_data_'.$COMPOSE_ID];
}

// Nothing below is called during message composition, only at "new/forward/reply/draft" initialization or
// if a compose-ID is given (i.e. when the compose step is opened in a new window/tab).
if (!is_array($COMPOSE))
{
  // Infinite redirect prevention in case of broken session (#1487028)
  if ($COMPOSE_ID)
    raise_error(array('code' => 500, 'type' => 'php',
      'file' => __FILE__, 'line' => __LINE__,
      'message' => "Invalid compose ID"), true, true);

  $COMPOSE_ID = uniqid(mt_rand());
  $_SESSION['compose_data_'.$COMPOSE_ID] = array(
    'id'      => $COMPOSE_ID,
    'param'   => request2param(RCUBE_INPUT_GET),
    'mailbox' => $RCMAIL->storage->get_folder(),
  );
  $COMPOSE =& $_SESSION['compose_data_'.$COMPOSE_ID];

  // process values like "mailto:foo@bar.com?subject=new+message&cc=another"
  if ($COMPOSE['param']['to']) {
    // #1486037: remove "mailto:" prefix
    $COMPOSE['param']['to'] = preg_replace('/^mailto:/i', '', $COMPOSE['param']['to']);
    $mailto = explode('?', $COMPOSE['param']['to']);
    if (count($mailto) > 1) {
      $COMPOSE['param']['to'] = $mailto[0];
      parse_str($mailto[1], $query);
      foreach ($query as $f => $val)
        $COMPOSE['param'][$f] = $val;
    }
  }

  // select folder where to save the sent message
  $COMPOSE['param']['sent_mbox'] = $RCMAIL->config->get('sent_mbox');

  // pipe compose parameters thru plugins
  $plugin = $RCMAIL->plugins->exec_hook('message_compose', $COMPOSE);
  $COMPOSE['param'] = array_merge($COMPOSE['param'], $plugin['param']);

  // add attachments listed by message_compose hook
  if (is_array($plugin['attachments'])) {
    foreach ($plugin['attachments'] as $attach) {
      // we have structured data
      if (is_array($attach)) {
        $attachment = $attach;
      }
      // only a file path is given
      else {
        $filename = basename($attach);
        $attachment = array(
          'group' => $COMPOSE_ID,
          'name' => $filename,
          'mimetype' => rc_mime_content_type($attach, $filename),
          'path' => $attach,
        );
      }

      // save attachment if valid
      if (($attachment['data'] && $attachment['name']) || ($attachment['path'] && file_exists($attachment['path']))) {
        $attachment = rcmail::get_instance()->plugins->exec_hook('attachment_save', $attachment);
      }

      if ($attachment['status'] && !$attachment['abort']) {
        unset($attachment['data'], $attachment['status'], $attachment['abort']);
        $COMPOSE['attachments'][$attachment['id']] = $attachment;
      }
    }
  }

  // check if folder for saving sent messages exists and is subscribed (#1486802)
  if ($sent_folder = $COMPOSE['param']['sent_mbox']) {
    rcmail_check_sent_folder($sent_folder, true);
  }

  // redirect to a unique URL with all parameters stored in session
  $OUTPUT->redirect(array(
    '_action' => 'compose',
    '_id'     => $COMPOSE['id'],
    '_search' => $_REQUEST['_search'],
  ));
}


// add some labels to client
$OUTPUT->add_label('nosubject', 'nosenderwarning', 'norecipientwarning', 'nosubjectwarning', 'cancel',
    'nobodywarning', 'notsentwarning', 'notuploadedwarning', 'savingmessage', 'sendingmessage', 
    'messagesaved', 'converting', 'editorwarning', 'searching', 'uploading', 'uploadingmany',
    'fileuploaderror', 'sendmessage');

$OUTPUT->set_env('compose_id', $COMPOSE['id']);
$OUTPUT->set_pagetitle(rcube_label('compose'));

// add config parameters to client script
if (!empty($CONFIG['drafts_mbox'])) {
  $OUTPUT->set_env('drafts_mailbox', $CONFIG['drafts_mbox']);
  $OUTPUT->set_env('draft_autosave', $CONFIG['draft_autosave']);
}
// set current mailbox in client environment
$OUTPUT->set_env('mailbox', $RCMAIL->storage->get_folder());
$OUTPUT->set_env('top_posting', intval($RCMAIL->config->get('reply_mode')) > 0);
$OUTPUT->set_env('recipients_separator', trim($RCMAIL->config->get('recipients_separator', ',')));

// default font for HTML editor
$font = rcube_fontdefs($RCMAIL->config->get('default_font'));
if ($font && !is_array($font)) {
  $OUTPUT->set_env('default_font', $font);
}

// get reference message and set compose mode
if ($msg_uid = $COMPOSE['param']['draft_uid']) {
  $compose_mode = RCUBE_COMPOSE_DRAFT;
  $OUTPUT->set_env('draft_id', $msg_uid);
  $RCMAIL->storage->set_folder($CONFIG['drafts_mbox']);
}
else if ($msg_uid = $COMPOSE['param']['reply_uid']) {
  $compose_mode = RCUBE_COMPOSE_REPLY;
}
else if ($msg_uid = $COMPOSE['param']['forward_uid']) {
  $compose_mode = RCUBE_COMPOSE_FORWARD;
  $COMPOSE['forward_uid']   = $msg_uid;
  $COMPOSE['as_attachment'] = !empty($COMPOSE['param']['attachment']);
}
else if ($msg_uid = $COMPOSE['param']['uid']) {
  $compose_mode = RCUBE_COMPOSE_EDIT;
}
$OUTPUT->set_env('compose_mode', $compose_mode);

$config_show_sig = $RCMAIL->config->get('show_sig', 1);
if ($compose_mode == RCUBE_COMPOSE_EDIT || $compose_mode == RCUBE_COMPOSE_DRAFT) {
  // don't add signature in draft/edit mode, we'll also not remove the old-one
  // but only on page display, later we should be able to change identity/sig (#1489229)
  if ($config_show_sig == 1 || $config_show_sig == 2)
    $OUTPUT->set_env('show_sig_later', true);
}
else if ($config_show_sig == 1)
  $OUTPUT->set_env('show_sig', true);
else if ($config_show_sig == 2 && empty($compose_mode))
  $OUTPUT->set_env('show_sig', true);
else if ($config_show_sig == 3 && ($compose_mode == RCUBE_COMPOSE_REPLY || $compose_mode == RCUBE_COMPOSE_FORWARD))
  $OUTPUT->set_env('show_sig', true);

// set line length for body wrapping
$LINE_LENGTH = $RCMAIL->config->get('line_length', 72);

if (!empty($msg_uid) && empty($COMPOSE['as_attachment']))
{
  $mbox_name = $RCMAIL->storage->get_folder();

  // set format before rcube_message construction
  // use the same format as for the message view
  if (isset($_SESSION['msg_formats'][$mbox_name.':'.$msg_uid])) {
    $RCMAIL->config->set('prefer_html', $_SESSION['msg_formats'][$mbox_name.':'.$msg_uid]);
  }
  else {
    $prefer_html = $CONFIG['prefer_html'] || $CONFIG['htmleditor'] || $compose_mode == RCUBE_COMPOSE_DRAFT || $compose_mode == RCUBE_COMPOSE_EDIT;
    $RCMAIL->config->set('prefer_html', $prefer_html);
  }

  $MESSAGE = new rcube_message($msg_uid);

  // make sure message is marked as read
  if ($MESSAGE->headers && empty($MESSAGE->headers->flags['SEEN']))
    $RCMAIL->storage->set_flag($msg_uid, 'SEEN');

  if (!empty($MESSAGE->headers->charset))
    $RCMAIL->storage->set_charset($MESSAGE->headers->charset);

  if (!$MESSAGE->headers) {
    // error
  }
  else if ($compose_mode == RCUBE_COMPOSE_REPLY) {
    $COMPOSE['reply_uid'] = $msg_uid;
    $COMPOSE['reply_msgid'] = $MESSAGE->headers->messageID;
    $COMPOSE['references']  = trim($MESSAGE->headers->references . " " . $MESSAGE->headers->messageID);

    if (!empty($COMPOSE['param']['all']))
      $MESSAGE->reply_all = $COMPOSE['param']['all'];

    // Save the sent message in the same folder of the message being replied to
    if ($RCMAIL->config->get('reply_same_folder') && ($sent_folder = $COMPOSE['mailbox'])
      && rcmail_check_sent_folder($sent_folder, false)
    ) {
      $COMPOSE['param']['sent_mbox'] = $sent_folder;
    }
  }
  else if ($compose_mode == RCUBE_COMPOSE_DRAFT || $compose_mode == RCUBE_COMPOSE_EDIT) {
    if ($compose_mode == RCUBE_COMPOSE_DRAFT && ($draft_info = $MESSAGE->headers->get('x-draft-info'))) {
      // get reply_uid/forward_uid to flag the original message when sending
      $info = rcmail_draftinfo_decode($draft_info);

      if ($info['type'] == 'reply')
        $COMPOSE['reply_uid'] = $info['uid'];
      else if ($info['type'] == 'forward')
        $COMPOSE['forward_uid'] = $info['uid'];

      $COMPOSE['mailbox'] = $info['folder'];

      // Save the sent message in the same folder of the message being replied to
      if ($RCMAIL->config->get('reply_same_folder') && ($sent_folder = $info['folder'])
        && rcmail_check_sent_folder($sent_folder, false)
      ) {
        $COMPOSE['param']['sent_mbox'] = $sent_folder;
      }
    }

    if ($in_reply_to = $MESSAGE->headers->get('in-reply-to'))
      $COMPOSE['reply_msgid'] = '<' . $in_reply_to . '>';

    $COMPOSE['references'] = $MESSAGE->headers->references;
  }
}
else {
  $MESSAGE = new stdClass();
}

$MESSAGE->compose = array();

// get user's identities
$MESSAGE->identities = $RCMAIL->user->list_identities(null, true);

// Set From field value
if (!empty($_POST['_from'])) {
  $MESSAGE->compose['from'] = get_input_value('_from', RCUBE_INPUT_POST);
}
else if (!empty($COMPOSE['param']['from'])) {
  $MESSAGE->compose['from'] = $COMPOSE['param']['from'];
}
else if (count($MESSAGE->identities)) {
  $ident = rcmail_identity_select($MESSAGE, $MESSAGE->identities, $compose_mode);

  $MESSAGE->compose['from_email'] = $ident['email'];
  $MESSAGE->compose['from']       = $ident['identity_id'];
}

// Set other headers
$a_recipients = array();
$parts        = array('to', 'cc', 'bcc', 'replyto', 'followupto');
$separator    = trim($RCMAIL->config->get('recipients_separator', ',')) . ' ';

foreach ($parts as $header) {
  $fvalue = '';
  $decode_header = true;

  // we have a set of recipients stored is session
  if ($header == 'to' && ($mailto_id = $COMPOSE['param']['mailto'])
      && $_SESSION['mailto'][$mailto_id]
  ) {
    $fvalue = urldecode($_SESSION['mailto'][$mailto_id]);
    $decode_header = false;

    // make session to not grow up too much
    unset($_SESSION['mailto'][$mailto_id]);
    $COMPOSE['param']['to'] = $fvalue;
  }
  else if (!empty($_POST['_'.$header])) {
    $fvalue = get_input_value('_'.$header, RCUBE_INPUT_POST, TRUE);
  }
  else if (!empty($COMPOSE['param'][$header])) {
    $fvalue = $COMPOSE['param'][$header];
  }
  else if ($compose_mode == RCUBE_COMPOSE_REPLY) {
    // get recipent address(es) out of the message headers
    if ($header == 'to') {
      $mailfollowup = $MESSAGE->headers->others['mail-followup-to'];
      $mailreplyto  = $MESSAGE->headers->others['mail-reply-to'];

      // Reply to mailing list...
      if ($MESSAGE->reply_all == 'list' && $mailfollowup)
        $fvalue = $mailfollowup;
      else if ($MESSAGE->reply_all == 'list'
        && preg_match('/<mailto:([^>]+)>/i', $MESSAGE->headers->others['list-post'], $m))
        $fvalue = $m[1];
      // Reply to...
      else if ($MESSAGE->reply_all && $mailfollowup)
        $fvalue = $mailfollowup;
      else if ($mailreplyto)
        $fvalue = $mailreplyto;
      else if (!empty($MESSAGE->headers->replyto))
        $fvalue = $MESSAGE->headers->replyto;
      else if (!empty($MESSAGE->headers->from))
        $fvalue = $MESSAGE->headers->from;

      // Reply to message sent by yourself (#1487074, #1489230)
      if (!empty($ident) && in_array($ident['ident'], array($fvalue, $MESSAGE->headers->from))) {
        $fvalue = $MESSAGE->headers->to;
      }
    }
    // add recipient of original message if reply to all
    else if ($header == 'cc' && !empty($MESSAGE->reply_all) && $MESSAGE->reply_all != 'list') {
      if ($v = $MESSAGE->headers->to)
        $fvalue .= $v;
      if ($v = $MESSAGE->headers->cc)
        $fvalue .= (!empty($fvalue) ? $separator : '') . $v;
      // Use Sender header (#1489011)
      if (($v = $MESSAGE->headers->get('Sender', false)) && strpos($v, '-bounces@') === false)
        $fvalue .= (!empty($fvalue) ? $separator : '') . $v;

      // When To: and Reply-To: are the same we add From: address to the list (#1489037)
      if ($v = $MESSAGE->headers->from) {
        $from    = rcube_mime::decode_address_list($v, null, false, $MESSAGE->headers->charset, true);
        $to      = rcube_mime::decode_address_list($MESSAGE->headers->to, null, false, $MESSAGE->headers->charset, true);
        $replyto = rcube_mime::decode_address_list($MESSAGE->headers->replyto, null, false, $MESSAGE->headers->charset, true);

        if (count($replyto) && !count(array_diff($to, $replyto)) && count(array_diff($from, $to))) {
          $fvalue .= (!empty($fvalue) ? $separator : '') . $v;
        }
      }
    }
  }
  else if (in_array($compose_mode, array(RCUBE_COMPOSE_DRAFT, RCUBE_COMPOSE_EDIT))) {
    // get drafted headers
    if ($header=='to' && !empty($MESSAGE->headers->to))
      $fvalue = $MESSAGE->get_header('to', true);
    else if ($header=='cc' && !empty($MESSAGE->headers->cc))
      $fvalue = $MESSAGE->get_header('cc', true);
    else if ($header=='bcc' && !empty($MESSAGE->headers->bcc))
      $fvalue = $MESSAGE->get_header('bcc', true);
    else if ($header=='replyto' && !empty($MESSAGE->headers->others['mail-reply-to']))
      $fvalue = $MESSAGE->get_header('mail-reply-to');
    else if ($header=='replyto' && !empty($MESSAGE->headers->replyto))
      $fvalue = $MESSAGE->get_header('reply-to');
    else if ($header=='followupto' && !empty($MESSAGE->headers->others['mail-followup-to']))
      $fvalue = $MESSAGE->get_header('mail-followup-to');
  }

  // split recipients and put them back together in a unique way
  if (!empty($fvalue) && in_array($header, array('to', 'cc', 'bcc'))) {
    $to_addresses = rcube_mime::decode_address_list($fvalue, null, $decode_header, $MESSAGE->headers->charset);
    $fvalue = array();

    foreach ($to_addresses as $addr_part) {
      if (empty($addr_part['mailto']))
        continue;

      $mailto = format_email(rcube_idn_to_utf8($addr_part['mailto']));

      if (!in_array($mailto, $a_recipients)
        && ($header == 'to' || empty($MESSAGE->compose['from_email']) || $mailto != $MESSAGE->compose['from_email'])
      ) {
        if ($addr_part['name'] && $addr_part['mailto'] != $addr_part['name'])
          $string = format_email_recipient($mailto, $addr_part['name']);
        else
          $string = $mailto;

        $fvalue[] = $string;
        $a_recipients[] = $addr_part['mailto'];
      }
    }

    $fvalue = implode($separator, $fvalue);
  }

  $MESSAGE->compose[$header] = $fvalue;
}
unset($a_recipients);

// process $MESSAGE body/attachments, set $MESSAGE_BODY/$HTML_MODE vars and some session data
$MESSAGE_BODY = rcmail_prepare_message_body();


/****** compose mode functions ********/

function rcmail_compose_headers($attrib)
{
  global $MESSAGE;

  list($form_start,) = get_form_tags($attrib);

  $out  = '';
  $part = strtolower($attrib['part']);

  switch ($part)
  {
    case 'from':
      return $form_start . rcmail_compose_header_from($attrib);

    case 'to':
    case 'cc':
    case 'bcc':
      $fname = '_' . $part;
      $header = $param = $part;

      $allow_attrib = array('id', 'class', 'style', 'cols', 'rows', 'tabindex');
      $field_type = 'html_textarea';
      break;

    case 'replyto':
    case 'reply-to':
      $fname = '_replyto';
      $param = 'replyto';
      $header = 'reply-to';

    case 'followupto':
    case 'followup-to':
      if (!$fname) {
        $fname = '_followupto';
        $param = 'followupto';
        $header = 'mail-followup-to';
      }

      $allow_attrib = array('id', 'class', 'style', 'size', 'tabindex');
      $field_type = 'html_inputfield';
      break;
  }

  if ($fname && $field_type)
  {
    // pass the following attributes to the form class
    $field_attrib = array('name' => $fname, 'spellcheck' => 'false');
    foreach ($attrib as $attr => $value)
      if (in_array($attr, $allow_attrib))
        $field_attrib[$attr] = $value;

    // create teaxtarea object
    $input = new $field_type($field_attrib);
    $out = $input->show($MESSAGE->compose[$param]);
  }

  if ($form_start)
    $out = $form_start.$out;

  // configure autocompletion
  rcube_autocomplete_init();

  return $out;
}


function rcmail_compose_header_from($attrib)
{
  global $MESSAGE, $OUTPUT, $RCMAIL, $COMPOSE, $compose_mode;

  // pass the following attributes to the form class
  $field_attrib = array('name' => '_from');
  foreach ($attrib as $attr => $value)
    if (in_array($attr, array('id', 'class', 'style', 'size', 'tabindex')))
      $field_attrib[$attr] = $value;

  if (count($MESSAGE->identities))
  {
    $a_signatures = array();
    $identities   = array();
    $separator    = intval($RCMAIL->config->get('reply_mode')) > 0
      && ($compose_mode == RCUBE_COMPOSE_REPLY || $compose_mode == RCUBE_COMPOSE_FORWARD) ? '---' : '-- ';

    $field_attrib['onchange'] = JS_OBJECT_NAME.".change_identity(this)";
    $select_from = new html_select($field_attrib);

    // create SELECT element
    foreach ($MESSAGE->identities as $sql_arr)
    {
      $identity_id = $sql_arr['identity_id'];
      $select_from->add(format_email_recipient($sql_arr['email'], $sql_arr['name']), $identity_id);

      // add signature to array
      if (!empty($sql_arr['signature']) && empty($COMPOSE['param']['nosig']))
      {
        $text = $html = $sql_arr['signature'];

        if ($sql_arr['html_signature']) {
            $h2t  = new rcube_html2text($sql_arr['signature'], false, false);
            $text = trim($h2t->get_text());
        }
        else {
            $html = htmlentities($html, ENT_NOQUOTES, RCMAIL_CHARSET);
        }

        if (!preg_match('/^--[ -]\r?\n/m', $text)) {
            $text = $separator . "\n" . $text;
            $html = $separator . "<br>" . $html;
        }

        if (!$sql_arr['html_signature']) {
            $html = "<pre>" . $html . "</pre>";
        }

        $a_signatures[$identity_id]['text'] = $text;
        $a_signatures[$identity_id]['html'] = $html;
      }

      // add bcc and reply-to
      if (!empty($sql_arr['reply-to'])) {
        $identities[$identity_id]['replyto'] = $sql_arr['reply-to'];
      }
      if (!empty($sql_arr['bcc'])) {
        $identities[$identity_id]['bcc'] = $sql_arr['bcc'];
      }
    }

    $out = $select_from->show($MESSAGE->compose['from']);

    // add signatures to client
    $OUTPUT->set_env('signatures', $a_signatures);
    $OUTPUT->set_env('identities', $identities);
  }
  // no identities, display text input field
  else {
    $field_attrib['class'] = 'from_address';
    $input_from = new html_inputfield($field_attrib);
    $out = $input_from->show($MESSAGE->compose['from']);
  }

  return $out;
}


function rcmail_compose_editor_mode()
{
  global $RCMAIL, $compose_mode;
  static $useHtml;

  if ($useHtml !== null)
    return $useHtml;

  $html_editor = intval($RCMAIL->config->get('htmleditor'));

  if (isset($_POST['_is_html'])) {
    $useHtml = !empty($_POST['_is_html']);
  }
  else if ($compose_mode == RCUBE_COMPOSE_DRAFT || $compose_mode == RCUBE_COMPOSE_EDIT) {
    $useHtml = rcmail_message_is_html();
  }
  else if ($compose_mode == RCUBE_COMPOSE_REPLY) {
    $useHtml = ($html_editor == 1 || ($html_editor >= 2 && rcmail_message_is_html()));
  }
  else if ($compose_mode == RCUBE_COMPOSE_FORWARD) {
    $useHtml = ($html_editor == 1 || ($html_editor == 3 && rcmail_message_is_html()));
  }
  else {
    $useHtml = ($html_editor == 1);
  }

  return $useHtml;
}

function rcmail_message_is_html()
{
    global $RCMAIL, $MESSAGE;
    return $RCMAIL->config->get('prefer_html') && ($MESSAGE instanceof rcube_message) && $MESSAGE->has_html_part(true);
}

function rcmail_prepare_message_body()
{
  global $RCMAIL, $MESSAGE, $COMPOSE, $compose_mode, $HTML_MODE;

  // use posted message body
  if (!empty($_POST['_message'])) {
    $body = get_input_value('_message', RCUBE_INPUT_POST, true);
    $isHtml = (bool) get_input_value('_is_html', RCUBE_INPUT_POST);
  }
  else if ($COMPOSE['param']['body']) {
    $body = $COMPOSE['param']['body'];
    $isHtml = false;
  }
  // forward as attachment
  else if ($compose_mode == RCUBE_COMPOSE_FORWARD && $COMPOSE['as_attachment']) {
    $isHtml = rcmail_compose_editor_mode();
    $body = '';
    rcmail_write_forward_attachments();
  }
  // reply/edit/draft/forward
  else if ($compose_mode && ($compose_mode != RCUBE_COMPOSE_REPLY || intval($RCMAIL->config->get('reply_mode')) != -1)) {
    $isHtml   = rcmail_compose_editor_mode();
    $messages = array();

    if (!empty($MESSAGE->parts)) {
      // collect IDs of message/rfc822 parts
      if ($compose_mode == RCUBE_COMPOSE_EDIT || $compose_mode == RCUBE_COMPOSE_DRAFT) {
        foreach ($MESSAGE->attachments as $part) {
          if ($part->mimetype == 'message/rfc822') {
            $messages[] = $part->mime_id;
          }
        }
      }

      foreach ($MESSAGE->parts as $part) {
        // skip no-content and attachment parts (#1488557)
        if ($part->type != 'content' || !$part->size || $MESSAGE->is_attachment($part)) {
          continue;
        }

        // skip all content parts inside the message/rfc822 part in DRAFT/EDIT mode
        foreach ($messages as $mimeid) {
          if (strpos($part->mime_id, $mimeid . '.') === 0) {
            continue 2;
          }
        }

        if ($part_body = rcmail_compose_part_body($part, $isHtml)) {
          $body .= ($body ? ($isHtml ? '<br/>' : "\n") : '') . $part_body;
        }
      }
    }
    else {
      $body = rcmail_compose_part_body($MESSAGE, $isHtml);
    }

    // compose reply-body
    if ($compose_mode == RCUBE_COMPOSE_REPLY)
      $body = rcmail_create_reply_body($body, $isHtml);
    // forward message body inline
    else if ($compose_mode == RCUBE_COMPOSE_FORWARD)
      $body = rcmail_create_forward_body($body, $isHtml);
    // load draft message body
    else if ($compose_mode == RCUBE_COMPOSE_DRAFT || $compose_mode == RCUBE_COMPOSE_EDIT)
      $body = rcmail_create_draft_body($body, $isHtml);
  }
  else { // new message
    $isHtml = rcmail_compose_editor_mode();
  }

  $plugin = $RCMAIL->plugins->exec_hook('message_compose_body',
    array('body' => $body, 'html' => $isHtml, 'mode' => $compose_mode));
  $body = $plugin['body'];
  unset($plugin);

  // add blocked.gif attachment (#1486516)
  if ($isHtml && preg_match('#<img src="\./program/resources/blocked\.gif"#', $body)) {
    if ($attachment = rcmail_save_image('program/resources/blocked.gif', 'image/gif')) {
      $COMPOSE['attachments'][$attachment['id']] = $attachment;
      $url = sprintf('%s&_id=%s&_action=display-attachment&_file=rcmfile%s',
        $RCMAIL->comm_path, $COMPOSE['id'], $attachment['id']);
      $body = preg_replace('#\./program/resources/blocked\.gif#', $url, $body);
    }
  }

  $HTML_MODE = $isHtml;

  return $body;
}

function rcmail_compose_part_body($part, $isHtml = false)
{
    global $RCMAIL, $MESSAGE, $LINE_LENGTH, $compose_mode;

    // Check if we have enough memory to handle the message in it
    // #1487424: we need up to 10x more memory than the body
    if (!rcmail_mem_check($part->size * 10)) {
        return '';
    }

    if (empty($part->ctype_parameters) || empty($part->ctype_parameters['charset'])) {
        $part->ctype_parameters['charset'] = $MESSAGE->headers->charset;
    }

    // fetch part if not available
    if (!isset($part->body)) {
        $part->body = $MESSAGE->get_part_content($part->mime_id);
    }

    // message is cached but not exists (#1485443), or other error
    if ($part->body === false) {
        return '';
    }

    $body = $part->body;

    if ($isHtml) {
        if ($part->ctype_secondary == 'html') {
        }
        else if ($part->ctype_secondary == 'enriched') {
            $body = rcube_enriched::to_html($body);
        }
        else {
            // try to remove the signature
            if ($compose_mode != RCUBE_COMPOSE_DRAFT && $compose_mode != RCUBE_COMPOSE_EDIT) {
                if ($RCMAIL->config->get('strip_existing_sig', true)) {
                    $body = rcmail_remove_signature($body);
                }
            }

            if ($part->ctype_parameters['format'] == 'flowed') {
                $body = rcube_mime::unfold_flowed($body);
            }

            // add HTML formatting
            $body = rcmail_plain_body($body);
            if ($body) {
                $body = '<pre>' . $body . '</pre>';
            }
        }
    }
    else {
        if ($part->ctype_secondary == 'enriched') {
            $body = rcube_enriched::to_html($body);
            $part->ctype_secondary = 'html';
        }

        if ($part->ctype_secondary == 'html') {
            // use html part if it has been used for message (pre)viewing
            // decrease line length for quoting
            $len = $compose_mode == RCUBE_COMPOSE_REPLY ? $LINE_LENGTH-2 : $LINE_LENGTH;
            $txt = new rcube_html2text($body, false, true, $len);
            $body = $txt->get_text();
        }
        else {
            if ($part->ctype_secondary == 'plain' && $part->ctype_parameters['format'] == 'flowed') {
                $body = rcube_mime::unfold_flowed($body);
            }

            // try to remove the signature
            if ($compose_mode != RCUBE_COMPOSE_DRAFT && $compose_mode != RCUBE_COMPOSE_EDIT) {
                if ($RCMAIL->config->get('strip_existing_sig', true)) {
                    $body = rcmail_remove_signature($body);
                }
            }
        }
    }

    return $body;
}

function rcmail_compose_body($attrib)
{
  global $RCMAIL, $CONFIG, $OUTPUT, $MESSAGE, $compose_mode, $HTML_MODE, $MESSAGE_BODY;

  list($form_start, $form_end) = get_form_tags($attrib);
  unset($attrib['form']);

  if (empty($attrib['id']))
    $attrib['id'] = 'rcmComposeBody';

  $attrib['name'] = '_message';

  $isHtml = $HTML_MODE;

  $out = $form_start ? "$form_start\n" : '';

  $saveid = new html_hiddenfield(array('name' => '_draft_saveid', 'value' => $compose_mode==RCUBE_COMPOSE_DRAFT ? str_replace(array('<','>'), "", $MESSAGE->headers->messageID) : ''));
  $out .= $saveid->show();

  $drafttoggle = new html_hiddenfield(array('name' => '_draft', 'value' => 'yes'));
  $out .= $drafttoggle->show();

  $msgtype = new html_hiddenfield(array('name' => '_is_html', 'value' => ($isHtml?"1":"0")));
  $out .= $msgtype->show();

  // If desired, set this textarea to be editable by TinyMCE
  if ($isHtml) {
    $MESSAGE_BODY = htmlentities($MESSAGE_BODY, ENT_NOQUOTES, RCMAIL_CHARSET);
    $attrib['class'] = 'mce_editor';
    $attrib['is_escaped'] = true;
    $textarea = new html_textarea($attrib);
    $out .= $textarea->show($MESSAGE_BODY);
  }
  else {
    $textarea = new html_textarea($attrib);
    $out .= $textarea->show('');
    // quote plain text, inject into textarea
    $table = get_html_translation_table(HTML_SPECIALCHARS);
    $MESSAGE_BODY = strtr($MESSAGE_BODY, $table);
    $out = substr($out, 0, -11) . $MESSAGE_BODY . '</textarea>';
  }

  $out .= $form_end ? "\n$form_end" : '';

  $OUTPUT->set_env('composebody', $attrib['id']);

  // include HTML editor
  rcube_html_editor();

  // Set language list
  if (!empty($CONFIG['enable_spellcheck'])) {
    $engine           = $RCMAIL->config->get('spellcheck_engine','googie');
    $dictionary       = (bool) $RCMAIL->config->get('spellcheck_dictionary');
    $spellcheck_langs = (array) $RCMAIL->config->get('spellcheck_languages',
      array('da'=>'Dansk', 'de'=>'Deutsch', 'en' => 'English', 'es'=>'Español',
            'fr'=>'Français', 'it'=>'Italiano', 'nl'=>'Nederlands', 'pl'=>'Polski',
            'pt'=>'Português', 'ru'=>'Русский', 'fi'=>'Suomi', 'sv'=>'Svenska'));

    // googie works only with two-letter codes
    if ($engine == 'googie') {
      $lang = strtolower(substr($_SESSION['language'], 0, 2));

      $spellcheck_langs_googie = array();
      foreach ($spellcheck_langs as $key => $name)
        $spellcheck_langs_googie[strtolower(substr($key,0,2))] = $name;
        $spellcheck_langs = $spellcheck_langs_googie;
    }
    else {
      $lang = $_SESSION['language'];

      // if not found in the list, try with two-letter code
      if (!$spellcheck_langs[$lang])
        $lang = strtolower(substr($lang, 0, 2));
    }

    if (!$spellcheck_langs[$lang])
      $lang = 'en';

    $OUTPUT->set_env('spell_langs', $spellcheck_langs);
    $OUTPUT->set_env('spell_lang', $lang);

    $editor_lang_set = array();
    foreach ($spellcheck_langs as $key => $name) {
      $editor_lang_set[] = ($key == $lang ? '+' : '') . JQ($name).'='.JQ($key);
    }

    // include GoogieSpell
    $OUTPUT->include_script('googiespell.js');
    $OUTPUT->add_script(sprintf(
      "var googie = new GoogieSpell('%s/images/googiespell/','%s&lang=', %s);\n".
      "googie.lang_chck_spell = \"%s\";\n".
      "googie.lang_rsm_edt = \"%s\";\n".
      "googie.lang_close = \"%s\";\n".
      "googie.lang_revert = \"%s\";\n".
      "googie.lang_no_error_found = \"%s\";\n".
      "googie.lang_learn_word = \"%s\";\n".
      "googie.setLanguages(%s);\n".
      "googie.setCurrentLanguage('%s');\n".
      "googie.setDecoration(false);\n".
      "googie.decorateTextarea('%s');\n".
      "%s.set_env('spellcheck', googie);",
      $RCMAIL->output->get_skin_path(),
      $RCMAIL->url(array('_task' => 'utils', '_action' => 'spell', '_remote' => 1)),
      !empty($dictionary) ? 'true' : 'false',
      JQ(Q(rcube_label('checkspelling'))),
      JQ(Q(rcube_label('resumeediting'))),
      JQ(Q(rcube_label('close'))),
      JQ(Q(rcube_label('revertto'))),
      JQ(Q(rcube_label('nospellerrors'))),
      JQ(Q(rcube_label('addtodict'))),
      json_serialize($spellcheck_langs),
      $lang,
      $attrib['id'],
      JS_OBJECT_NAME), 'foot');

    $OUTPUT->add_label('checking');
    $OUTPUT->set_env('spellcheck_langs', join(',', $editor_lang_set));
  }

  $out .= "\n".'<iframe name="savetarget" src="program/resources/blank.gif" style="width:0;height:0;border:none;visibility:hidden;"></iframe>';

  return $out;
}


function rcmail_create_reply_body($body, $bodyIsHtml)
{
  global $RCMAIL, $MESSAGE, $LINE_LENGTH;

  // build reply prefix
  $from = array_pop(rcube_mime::decode_address_list($MESSAGE->get_header('from'), 1, false, $MESSAGE->headers->charset));
  $prefix = rcube_label(array(
    'name' => 'mailreplyintro',
    'vars' => array(
      'date' => format_date($MESSAGE->headers->date, $RCMAIL->config->get('date_long')),
      'sender' => $from['name'] ? $from['name'] : rcube_idn_to_utf8($from['mailto']),
    )
  ));

  if (!$bodyIsHtml) {
    $body = preg_replace('/\r?\n/', "\n", $body);
    $body = trim($body, "\n");

    // soft-wrap and quote message text
    $body = rcmail_wrap_and_quote($body, $LINE_LENGTH);

    $prefix .= "\n";
    $suffix = '';

    if (intval($RCMAIL->config->get('reply_mode')) > 0) { // top-posting
      $prefix = "\n\n\n" . $prefix;
    }
  }
  else {
    // save inline images to files
    $cid_map = rcmail_write_inline_attachments($MESSAGE);
    // set is_safe flag (we need this for html body washing)
    rcmail_check_safe($MESSAGE);
    // clean up html tags
    $body = rcmail_wash_html($body, array('safe' => $MESSAGE->is_safe), $cid_map);

    // build reply (quote content)
    $prefix = '<p>' . Q($prefix) . "</p>\n";
    $prefix .= '<blockquote>';

    if (intval($RCMAIL->config->get('reply_mode')) > 0) { // top-posting
      $prefix = '<br>' . $prefix;
      $suffix = '</blockquote>';
    }
    else {
      $suffix = '</blockquote><p></p>';
    }
  }

  return $prefix.$body.$suffix;
}


function rcmail_create_forward_body($body, $bodyIsHtml)
{
  global $RCMAIL, $MESSAGE, $COMPOSE;

  // add attachments
  if (!isset($COMPOSE['forward_attachments']) && is_array($MESSAGE->mime_parts))
    $cid_map = rcmail_write_compose_attachments($MESSAGE, $bodyIsHtml);

  $date = format_date($MESSAGE->headers->date, $RCMAIL->config->get('date_long'));

  if (!$bodyIsHtml) {
    $prefix = "\n\n\n-------- " . rcube_label('originalmessage') . " --------\n";
    $prefix .= rcube_label('subject') . ': ' . $MESSAGE->subject . "\n";
    $prefix .= rcube_label('date')    . ': ' . $date . "\n";
    $prefix .= rcube_label('from')    . ': ' . $MESSAGE->get_header('from') . "\n";
    $prefix .= rcube_label('to')      . ': ' . $MESSAGE->get_header('to') . "\n";

    if ($cc = $MESSAGE->headers->get('cc'))
      $prefix .= rcube_label('cc') . ': ' . $cc . "\n";
    if (($replyto = $MESSAGE->headers->get('reply-to')) && $replyto != $MESSAGE->get_header('from'))
      $prefix .= rcube_label('replyto') . ': ' . $replyto . "\n";

    $prefix .= "\n";
    $body = trim($body, "\r\n");
  }
  else {
    // set is_safe flag (we need this for html body washing)
    rcmail_check_safe($MESSAGE);
    // clean up html tags
    $body = rcmail_wash_html($body, array('safe' => $MESSAGE->is_safe), $cid_map);

    $prefix = sprintf(
      "<br /><p>-------- " . rcube_label('originalmessage') . " --------</p>" .
        "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\"><tbody>" .
        "<tr><th align=\"right\" nowrap=\"nowrap\" valign=\"baseline\">%s: </th><td>%s</td></tr>" .
        "<tr><th align=\"right\" nowrap=\"nowrap\" valign=\"baseline\">%s: </th><td>%s</td></tr>" .
        "<tr><th align=\"right\" nowrap=\"nowrap\" valign=\"baseline\">%s: </th><td>%s</td></tr>" .
        "<tr><th align=\"right\" nowrap=\"nowrap\" valign=\"baseline\">%s: </th><td>%s</td></tr>",
      rcube_label('subject'), Q($MESSAGE->subject),
      rcube_label('date'), Q($date),
      rcube_label('from'), Q($MESSAGE->get_header('from'), 'replace'),
      rcube_label('to'), Q($MESSAGE->get_header('to'), 'replace'));

    if ($cc = $MESSAGE->headers->get('cc'))
      $prefix .= sprintf("<tr><th align=\"right\" nowrap=\"nowrap\" valign=\"baseline\">%s: </th><td>%s</td></tr>",
        rcube_label('cc'), Q($cc, 'replace'));

    if (($replyto = $MESSAGE->headers->get('reply-to')) && $replyto != $MESSAGE->get_header('from'))
      $prefix .= sprintf("<tr><th align=\"right\" nowrap=\"nowrap\" valign=\"baseline\">%s: </th><td>%s</td></tr>",
        rcube_label('replyto'), Q($replyto, 'replace'));

    $prefix .= "</tbody></table><br>";
  }

  return $prefix.$body;
}


function rcmail_create_draft_body($body, $bodyIsHtml)
{
  global $MESSAGE, $COMPOSE;

  /**
   * add attachments
   * sizeof($MESSAGE->mime_parts can be 1 - e.g. attachment, but no text!
   */
  if (empty($COMPOSE['forward_attachments'])
      && is_array($MESSAGE->mime_parts)
      && count($MESSAGE->mime_parts) > 0)
  {
    $cid_map = rcmail_write_compose_attachments($MESSAGE, $bodyIsHtml);
  }

  // clean up HTML tags - XSS prevention (#1489251)
  if ($bodyIsHtml) {
    $body = rcmail_wash_html($body, array('safe' => 1), $cid_map);

    // remove comments (produced by washtml)
    $body = preg_replace('/<!--[^>]+-->/', '', $body);

    // replace cid with href in inline images links
    if (!empty($cid_map)) {
      $body = str_replace(array_keys($cid_map), array_values($cid_map), $body);
    }
  }

  return $body;
}


function rcmail_remove_signature($body)
{
  global $RCMAIL;

  $body = str_replace("\r\n", "\n", $body);
  $len  = strlen($body);
  $sig_max_lines = $RCMAIL->config->get('sig_max_lines', 15);

  while (($sp = strrpos($body, "-- \n", $sp ? -$len+$sp-1 : 0)) !== false) {
    if ($sp == 0 || $body[$sp-1] == "\n") {
      // do not touch blocks with more that X lines
      if (substr_count($body, "\n", $sp) < $sig_max_lines) {
        $body = substr($body, 0, max(0, $sp-1));
      }
      break;
    }
  }

  return $body;
}


function rcmail_write_compose_attachments(&$message, $bodyIsHtml)
{
  global $RCMAIL, $COMPOSE, $compose_mode;

  $loaded_attachments = array();
  foreach ((array)$COMPOSE['attachments'] as $attachment) {
      $loaded_attachments[$attachment['name'] . $attachment['mimetype']] = $attachment;
  }

  $cid_map  = array();
  $messages = array();

  foreach ((array)$message->mime_parts as $pid => $part)
  {
    if ($part->disposition == 'attachment' || ($part->disposition == 'inline' && $bodyIsHtml) || $part->filename) {
      // skip parts that aren't valid attachments
      if ($part->ctype_primary == 'multipart' || $part->mimetype == 'application/ms-tnef') {
        continue;
      }
      // skip message attachments in reply mode
      if ($part->ctype_primary == 'message' && $compose_mode == RCUBE_COMPOSE_REPLY) {
        continue;
      }
      // skip inline images when forwarding in text mode
      if ($part->content_id && $part->disposition == 'inline' && !$bodyIsHtml && $compose_mode == RCUBE_COMPOSE_FORWARD) {
        continue;
      }

      // skip message/rfc822 attachments on forwards (#1489214)
      // Thunderbird when forwarding in inline mode displays such attachments
      // and skips any attachments from inside of such part, this however
      // skipped e.g. images used in HTML body or other attachments. So,
      // better to skip .eml attachments but not their content (included files).
      if ($part->mimetype == 'message/rfc822') {
        if ($compose_mode == RCUBE_COMPOSE_FORWARD) {
          continue;
        }
        $messages[] = $part->mime_id;
      }
      else if ($compose_mode != RCUBE_COMPOSE_FORWARD) {
        // skip attachments included in message/rfc822 attachment (#1486487)
        foreach ($messages as $mimeid)
          if (strpos($part->mime_id, $mimeid . '.') === 0) {
            continue 2;
          }
      }

      if (($attachment = $loaded_attachments[rcmail_attachment_name($part) . $part->mimetype])
          || ($attachment = rcmail_save_attachment($message, $pid))) {
        $COMPOSE['attachments'][$attachment['id']] = $attachment;
        if ($bodyIsHtml && ($part->content_id || $part->content_location)) {
          $url = sprintf('%s&_id=%s&_action=display-attachment&_file=rcmfile%s',
            $RCMAIL->comm_path, $COMPOSE['id'], $attachment['id']);
          if ($part->content_id)
            $cid_map['cid:'.$part->content_id] = $url;
          else
            $cid_map[$part->content_location] = $url;
        }
      }
    }
  }

  $COMPOSE['forward_attachments'] = true;

  return $cid_map;
}


function rcmail_write_inline_attachments(&$message)
{
  global $RCMAIL, $COMPOSE;

  $cid_map = array();
  foreach ((array)$message->mime_parts as $pid => $part) {
    if (($part->content_id || $part->content_location) && $part->filename) {
      if ($attachment = rcmail_save_attachment($message, $pid)) {
        $COMPOSE['attachments'][$attachment['id']] = $attachment;
          $url = sprintf('%s&_id=%s&_action=display-attachment&_file=rcmfile%s',
            $RCMAIL->comm_path, $COMPOSE['id'], $attachment['id']);
        if ($part->content_id)
          $cid_map['cid:'.$part->content_id] = $url;
        else
          $cid_map[$part->content_location] = $url;
      }
    }
  }

  return $cid_map;
}

// Creates attachment(s) from the forwarded message(s)
function rcmail_write_forward_attachments()
{
  global $RCMAIL, $COMPOSE, $MESSAGE;

  $storage   = $RCMAIL->get_storage();
  $mem_limit = parse_bytes(ini_get('memory_limit'));
  $curr_mem  = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB
  $names     = array();

  $loaded_attachments = array();
  foreach ((array)$COMPOSE['attachments'] as $attachment) {
      $loaded_attachments[$attachment['name'] . $attachment['mimetype']] = $attachment;
  }

  if ($COMPOSE['forward_uid'] == '*') {
    $index = $storage->index(null, rcmail_sort_column(), rcmail_sort_order());
    $COMPOSE['forward_uid'] = $index->get();
  }
  else {
    $COMPOSE['forward_uid'] = explode(',', $COMPOSE['forward_uid']);
  }

  foreach ((array)$COMPOSE['forward_uid'] as $uid) {
    $message = new rcube_message($uid);

    if (empty($message->headers)) {
      continue;
    }

    if (!empty($message->headers->charset)) {
      $storage->set_charset($message->headers->charset);
    }

    if (empty($MESSAGE->subject)) {
      $MESSAGE->subject = $message->subject;
    }

    // generate (unique) attachment name
    $name = strlen($message->subject) ? mb_substr($message->subject, 0, 64) : 'message_rfc822';
    if (!empty($names[$name])) {
      $names[$name]++;
      $name .= '_' . $names[$name];
    }
    $names[$name] = 1;
    $name .= '.eml';

    $data = $path = null;

    if (!empty($loaded_attachments[$name . 'message/rfc822'])) {
      continue;
    }

    // don't load too big attachments into memory
    if ($mem_limit > 0 && $message->size > $mem_limit - $curr_mem) {
      $temp_dir = unslashify($RCMAIL->config->get('temp_dir'));
      $path = tempnam($temp_dir, 'rcmAttmnt');
      if ($fp = fopen($path, 'w')) {
        $storage->get_raw_body($message->uid, $fp);
        fclose($fp);
      }
      else {
        return false;
      }
    }
    else {
      $data = $storage->get_raw_body($message->uid);
      $curr_mem += $message->size;
    }

    $attachment = array(
      'group' => $COMPOSE['id'],
      'name' => $name,
      'mimetype' => 'message/rfc822',
      'data' => $data,
      'path' => $path,
      'size' => $path ? filesize($path) : strlen($data),
    );

    $attachment = $RCMAIL->plugins->exec_hook('attachment_save', $attachment);

    if ($attachment['status']) {
      unset($attachment['data'], $attachment['status'], $attachment['content_id'], $attachment['abort']);
      $COMPOSE['attachments'][$attachment['id']] = $attachment;
    }
    else if ($path) {
      @unlink($path);
    }
  }
}


function rcmail_save_attachment(&$message, $pid)
{
  global $COMPOSE;

  $rcmail = rcmail::get_instance();
  $part = $message->mime_parts[$pid];
  $mem_limit = parse_bytes(ini_get('memory_limit'));
  $curr_mem = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB
  $data = $path = null;

  // don't load too big attachments into memory
  if ($mem_limit > 0 && $part->size > $mem_limit - $curr_mem) {
    $temp_dir = unslashify($rcmail->config->get('temp_dir'));
    $path = tempnam($temp_dir, 'rcmAttmnt');
    if ($fp = fopen($path, 'w')) {
      $message->get_part_content($pid, $fp);
      fclose($fp);
    } else
      return false;
  } else {
    $data = $message->get_part_content($pid);
  }

  $mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
  $filename = rcmail_attachment_name($part);

  $attachment = array(
    'group' => $COMPOSE['id'],
    'name' => $filename,
    'mimetype' => $mimetype,
    'content_id' => $part->content_id,
    'data' => $data,
    'path' => $path,
    'size' => $path ? filesize($path) : strlen($data),
  );

  $attachment = $rcmail->plugins->exec_hook('attachment_save', $attachment);

  if ($attachment['status']) {
    unset($attachment['data'], $attachment['status'], $attachment['content_id'], $attachment['abort']);
    return $attachment;
  } else if ($path) {
    @unlink($path);
  }

  return false;
}

function rcmail_save_image($path, $mimetype='')
{
  global $COMPOSE;

  // handle attachments in memory
  $data = file_get_contents($path);
  $name = rcmail_basename($path);

  $attachment = array(
    'group' => $COMPOSE['id'],
    'name' => $name,
    'mimetype' => $mimetype ? $mimetype : rc_mime_content_type($path, $name),
    'data' => $data,
    'size' => strlen($data),
  );

  $attachment = rcmail::get_instance()->plugins->exec_hook('attachment_save', $attachment);

  if ($attachment['status']) {
    unset($attachment['data'], $attachment['status'], $attachment['content_id'], $attachment['abort']);
    return $attachment;
  }

  return false;
}

function rcmail_basename($filename)
{
  // basename() is not unicode safe and locale dependent
  if (stristr(PHP_OS, 'win') || stristr(PHP_OS, 'netware')) {
    return preg_replace('/^.*[\\\\\\/]/', '', $filename);
  } else {
    return preg_replace('/^.*[\/]/', '', $filename);
  }
}

function rcmail_compose_subject($attrib)
{
  global $MESSAGE, $COMPOSE, $compose_mode;

  list($form_start, $form_end) = get_form_tags($attrib);
  unset($attrib['form']);

  $attrib['name'] = '_subject';
  $attrib['spellcheck'] = 'true';
  $textfield = new html_inputfield($attrib);

  $subject = '';

  // use subject from post
  if (isset($_POST['_subject'])) {
    $subject = get_input_value('_subject', RCUBE_INPUT_POST, TRUE);
  }
  // create a reply-subject
  else if ($compose_mode == RCUBE_COMPOSE_REPLY) {
    if (preg_match('/^re:/i', $MESSAGE->subject))
      $subject = $MESSAGE->subject;
    else
      $subject = 'Re: '.$MESSAGE->subject;
  }
  // create a forward-subject
  else if ($compose_mode == RCUBE_COMPOSE_FORWARD) {
    if (preg_match('/^fwd:/i', $MESSAGE->subject))
      $subject = $MESSAGE->subject;
    else
      $subject = 'Fwd: '.$MESSAGE->subject;
  }
  // creeate a draft-subject
  else if ($compose_mode == RCUBE_COMPOSE_DRAFT || $compose_mode == RCUBE_COMPOSE_EDIT) {
    $subject = $MESSAGE->subject;
  }
  else if (!empty($COMPOSE['param']['subject'])) {
    $subject = $COMPOSE['param']['subject'];
  }

  $out = $form_start ? "$form_start\n" : '';
  $out .= $textfield->show($subject);
  $out .= $form_end ? "\n$form_end" : '';

  return $out;
}


function rcmail_compose_attachment_list($attrib)
{
  global $OUTPUT, $CONFIG, $COMPOSE;

  // add ID if not given
  if (!$attrib['id'])
    $attrib['id'] = 'rcmAttachmentList';

  $out = "\n";
  $jslist = array();

  if (is_array($COMPOSE['attachments'])) {
    if ($attrib['deleteicon']) {
      $button = html::img(array(
        'src' => $CONFIG['skin_path'] . $attrib['deleteicon'],
        'alt' => rcube_label('delete')
      ));
    }
    else
      $button = Q(rcube_label('delete'));

    foreach ($COMPOSE['attachments'] as $id => $a_prop) {
      if (empty($a_prop))
        continue;

      $out .= html::tag('li', array('id' => 'rcmfile'.$id, 'class' => rcmail_filetype2classname($a_prop['mimetype'], $a_prop['name'])),
        html::a(array(
            'href' => "#delete",
            'title' => rcube_label('delete'),
            'onclick' => sprintf("return %s.command('remove-attachment','rcmfile%s', this)", JS_OBJECT_NAME, $id),
            'class' => 'delete'),
          $button) . Q($a_prop['name']));

        $jslist['rcmfile'.$id] = array('name' => $a_prop['name'], 'complete' => true, 'mimetype' => $a_prop['mimetype']);
    }
  }

  if ($attrib['deleteicon'])
    $COMPOSE['deleteicon'] = $CONFIG['skin_path'] . $attrib['deleteicon'];
  if ($attrib['cancelicon'])
    $OUTPUT->set_env('cancelicon', $CONFIG['skin_path'] . $attrib['cancelicon']);
  if ($attrib['loadingicon'])
    $OUTPUT->set_env('loadingicon', $CONFIG['skin_path'] . $attrib['loadingicon']);

  $OUTPUT->set_env('attachments', $jslist);
  $OUTPUT->add_gui_object('attachmentlist', $attrib['id']);

  return html::tag('ul', $attrib, $out, html::$common_attrib);
}


function rcmail_compose_attachment_form($attrib)
{
  global $OUTPUT;

  // set defaults
  $attrib += array('id' => 'rcmUploadbox', 'buttons' => 'yes');

  // Get filesize, enable upload progress bar
  $max_filesize = rcube_upload_init();

  $button = new html_inputfield(array('type' => 'button'));

  $out = html::div($attrib,
    $OUTPUT->form_tag(array('id' => $attrib['id'].'Frm', 'name' => 'uploadform', 'method' => 'post', 'enctype' => 'multipart/form-data'),
      html::div(null, rcmail_compose_attachment_field(array('size' => $attrib['attachmentfieldsize']))) .
      html::div('hint', rcube_label(array('name' => 'maxuploadsize', 'vars' => array('size' => $max_filesize)))) .
      (get_boolean($attrib['buttons']) ? html::div('buttons',
        $button->show(rcube_label('close'), array('class' => 'button', 'onclick' => "$('#$attrib[id]').hide()")) . ' ' .
        $button->show(rcube_label('upload'), array('class' => 'button mainaction', 'onclick' => JS_OBJECT_NAME . ".command('send-attachment', this.form)"))
      ) : '')
    )
  );

  $OUTPUT->add_gui_object('uploadform', $attrib['id'].'Frm');
  return $out;
}


function rcmail_compose_attachment_field($attrib)
{
  $attrib['type'] = 'file';
  $attrib['name'] = '_attachments[]';
  $attrib['multiple'] = 'multiple';

  $field = new html_inputfield($attrib);
  return $field->show();
}


function rcmail_priority_selector($attrib)
{
  global $MESSAGE;

  list($form_start, $form_end) = get_form_tags($attrib);
  unset($attrib['form']);

  $attrib['name'] = '_priority';
  $selector = new html_select($attrib);

  $selector->add(array(rcube_label('lowest'),
                       rcube_label('low'),
                       rcube_label('normal'),
                       rcube_label('high'),
                       rcube_label('highest')),
                 array('5', '4', '0', '2', '1'));

  if (isset($_POST['_priority']))
    $sel = $_POST['_priority'];
  else if (isset($MESSAGE->headers->priority) && intval($MESSAGE->headers->priority) != 3)
    $sel = $MESSAGE->headers->priority;
  else
    $sel = 0;

  $out = $form_start ? "$form_start\n" : '';
  $out .= $selector->show(strval($sel));
  $out .= $form_end ? "\n$form_end" : '';

  return $out;
}


function rcmail_receipt_checkbox($attrib)
{
  global $RCMAIL, $MESSAGE, $compose_mode;

  list($form_start, $form_end) = get_form_tags($attrib);
  unset($attrib['form']);

  if (!isset($attrib['id']))
    $attrib['id'] = 'receipt';

  $attrib['name'] = '_receipt';
  $attrib['value'] = '1';
  $checkbox = new html_checkbox($attrib);

  if (isset($_POST['_receipt']))
    $mdn_default = $_POST['_receipt'];
  else if (in_array($compose_mode, array(RCUBE_COMPOSE_DRAFT, RCUBE_COMPOSE_EDIT)))
    $mdn_default = (bool) $MESSAGE->headers->mdn_to;
  else
    $mdn_default = $RCMAIL->config->get('mdn_default');

  $out = $form_start ? "$form_start\n" : '';
  $out .= $checkbox->show($mdn_default);
  $out .= $form_end ? "\n$form_end" : '';

  return $out;
}


function rcmail_dsn_checkbox($attrib)
{
  global $RCMAIL;

  list($form_start, $form_end) = get_form_tags($attrib);
  unset($attrib['form']);

  if (!isset($attrib['id']))
    $attrib['id'] = 'dsn';

  $attrib['name'] = '_dsn';
  $attrib['value'] = '1';
  $checkbox = new html_checkbox($attrib);

  if (isset($_POST['_dsn']))
    $dsn_value = $_POST['_dsn'];
  else
    $dsn_value = $RCMAIL->config->get('dsn_default');

  $out = $form_start ? "$form_start\n" : '';
  $out .= $checkbox->show($dsn_value);
  $out .= $form_end ? "\n$form_end" : '';

  return $out;
}


function rcmail_editor_selector($attrib)
{
  // determine whether HTML or plain text should be checked
  $useHtml = rcmail_compose_editor_mode();

  if (empty($attrib['editorid']))
    $attrib['editorid'] = 'rcmComposeBody';

  if (empty($attrib['name']))
    $attrib['name'] = 'editorSelect';

  $attrib['onchange'] = "return rcmail_toggle_editor(this, '".$attrib['editorid']."', '_is_html')";

  $select = new html_select($attrib);

  $select->add(Q(rcube_label('htmltoggle')), 'html');
  $select->add(Q(rcube_label('plaintoggle')), 'plain');

  return $select->show($useHtml ? 'html' : 'plain');
/*
  foreach ($choices as $value => $text) {
    $attrib['id'] = '_' . $value;
    $attrib['value'] = $value;
    $selector .= $radio->show($chosenvalue, $attrib) . html::label($attrib['id'], Q(rcube_label($text)));
  }

  return $selector;
*/
}


function rcmail_store_target_selection($attrib)
{
  global $COMPOSE;

  $attrib['name'] = '_store_target';
  $select = rcmail_mailbox_select(array_merge($attrib, array(
    'noselection' => '- '.rcube_label('dontsave').' -',
    'folder_filter' => 'mail',
    'folder_rights' => 'w',
  )));
  return $select->show(isset($_POST['_store_target']) ? $_POST['_store_target'] : $COMPOSE['param']['sent_mbox'], $attrib);
}


function rcmail_check_sent_folder($folder, $create=false)
{
  global $RCMAIL;

  // we'll not save the message, so it doesn't matter
  if ($RCMAIL->config->get('no_save_sent_messages')) {
    return true;
  }

  if ($RCMAIL->storage->folder_exists($folder, true)) {
    return true;
  }

  // folder may exist but isn't subscribed (#1485241)
  if ($create) {
    if (!$RCMAIL->storage->folder_exists($folder))
      return $RCMAIL->storage->create_folder($folder, true);
    else
      return $RCMAIL->storage->subscribe($folder);
  }

  return false;
}


function get_form_tags($attrib)
{
  global $RCMAIL, $MESSAGE_FORM, $COMPOSE;

  $form_start = '';
  if (!$MESSAGE_FORM)
  {
    $hiddenfields = new html_hiddenfield(array('name' => '_task', 'value' => $RCMAIL->task));
    $hiddenfields->add(array('name' => '_action', 'value' => 'send'));
    $hiddenfields->add(array('name' => '_id', 'value' => $COMPOSE['id']));
    $hiddenfields->add(array('name' => '_attachments'));

    $form_start = empty($attrib['form']) ? $RCMAIL->output->form_tag(array('name' => "form", 'method' => "post")) : '';
    $form_start .= $hiddenfields->show();
  }

  $form_end = ($MESSAGE_FORM && !strlen($attrib['form'])) ? '</form>' : '';
  $form_name = !empty($attrib['form']) ? $attrib['form'] : 'form';

  if (!$MESSAGE_FORM)
    $RCMAIL->output->add_gui_object('messageform', $form_name);

  $MESSAGE_FORM = $form_name;

  return array($form_start, $form_end);
}


function rcmail_addressbook_list($attrib = array())
{
    global $RCMAIL, $OUTPUT;

    $attrib += array('id' => 'rcmdirectorylist');

    $out = '';
    $line_templ = html::tag('li', array(
        'id' => 'rcmli%s', 'class' => '%s'),
        html::a(array('href' => '#list',
            'rel' => '%s',
            'onclick' => "return ".JS_OBJECT_NAME.".command('list-adresses','%s',this)"), '%s'));

    foreach ($RCMAIL->get_address_sources(false, true) as $j => $source) {
        $id = strval(strlen($source['id']) ? $source['id'] : $j);
        $js_id = JQ($id);

        // set class name(s)
        $class_name = 'addressbook';
        if ($source['class_name'])
            $class_name .= ' ' . $source['class_name'];

        $out .= sprintf($line_templ,
            html_identifier($id,true),
            $class_name,
            $source['id'],
            $js_id, (!empty($source['name']) ? $source['name'] : $id));
    }

    $OUTPUT->add_gui_object('addressbookslist', $attrib['id']);

    return html::tag('ul', $attrib, $out, html::$common_attrib);
}

// return the contacts list as HTML table
function rcmail_contacts_list($attrib = array())
{
    global $OUTPUT;

    $attrib += array('id' => 'rcmAddressList');

    // set client env
    $OUTPUT->add_gui_object('contactslist', $attrib['id']);
    $OUTPUT->set_env('pagecount', 0);
    $OUTPUT->set_env('current_page', 0);
    $OUTPUT->include_script('list.js');

    return rcube_table_output($attrib, array(), array('name'), 'ID');
}


/**
 * Register a certain container as active area to drop files onto
 */
function compose_file_drop_area($attrib)
{
    global $OUTPUT;

    if ($attrib['id']) {
        $OUTPUT->add_gui_object('filedrop', $attrib['id']);
        $OUTPUT->set_env('filedrop', array('action' => 'upload', 'fieldname' => '_attachments'));
    }
}


// register UI objects
$OUTPUT->add_handlers(array(
  'composeheaders' => 'rcmail_compose_headers',
  'composesubject' => 'rcmail_compose_subject',
  'composebody' => 'rcmail_compose_body',
  'composeattachmentlist' => 'rcmail_compose_attachment_list',
  'composeattachmentform' => 'rcmail_compose_attachment_form',
  'composeattachment' => 'rcmail_compose_attachment_field',
  'filedroparea'    => 'compose_file_drop_area',
  'priorityselector' => 'rcmail_priority_selector',
  'editorselector' => 'rcmail_editor_selector',
  'receiptcheckbox' => 'rcmail_receipt_checkbox',
  'dsncheckbox' => 'rcmail_dsn_checkbox',
  'storetarget' => 'rcmail_store_target_selection',
  'addressbooks' => 'rcmail_addressbook_list',
  'addresslist' => 'rcmail_contacts_list',
));

$OUTPUT->send('compose');