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rcube_message.php
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rcube_message.php
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<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_message.php |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2008-2009, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Logical representation of a mail message with all its data |
| and related functions |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
/**
* Logical representation of a mail message with all its data
* and related functions
*
* @package Mail
* @author Thomas Bruederli <roundcube@gmail.com>
*/
class rcube_message
{
private $app;
private $imap;
private $opt = array();
private $inline_parts = array();
private $parse_alternative = false;
public $uid = null;
public $headers;
public $structure;
public $parts = array();
public $mime_parts = array();
public $attachments = array();
public $subject = '';
public $sender = null;
public $is_safe = false;
/**
* __construct
*
* Provide a uid, and parse message structure.
*
* @param string $uid The message UID.
*
* @uses rcmail::get_instance()
* @uses rcube_imap::decode_mime_string()
* @uses self::set_safe()
*
* @see self::$app, self::$imap, self::$opt, self::$structure
*/
function __construct($uid)
{
$this->app = rcmail::get_instance();
$this->imap = $this->app->imap;
$this->uid = $uid;
$this->headers = $this->imap->get_headers($uid, NULL, true, true);
$this->subject = rcube_imap::decode_mime_string($this->headers->subject, $this->headers->charset);
list(, $this->sender) = each($this->imap->decode_address_list($this->headers->from));
$this->set_safe((intval($_GET['_safe']) || $_SESSION['safe_messages'][$uid]));
$this->opt = array(
'safe' => $this->is_safe,
'prefer_html' => $this->app->config->get('prefer_html'),
'get_url' => rcmail_url('get', array('_mbox' => $this->imap->get_mailbox_name(), '_uid' => $uid))
);
if ($this->structure = $this->imap->get_structure($uid, $this->headers->body_structure)) {
$this->get_mime_numbers($this->structure);
$this->parse_structure($this->structure);
}
else {
$this->body = $this->imap->get_body($uid);
}
// notify plugins and let them analyze this structured message object
$this->app->plugins->exec_hook('message_load', array('object' => $this));
}
/**
* Return a (decoded) message header
*
* @param string Header name
* @param bool Don't mime-decode the value
* @return string Header value
*/
public function get_header($name, $raw = false)
{
$value = $this->headers->$name;
return $raw ? $value : $this->imap->decode_header($value);
}
/**
* Set is_safe var and session data
*
* @param bool enable/disable
*/
public function set_safe($safe = true)
{
$this->is_safe = $safe;
$_SESSION['safe_messages'][$this->uid] = $this->is_safe;
}
/**
* Compose a valid URL for getting a message part
*
* @param string Part MIME-ID
* @return string URL or false if part does not exist
*/
public function get_part_url($mime_id)
{
if ($this->mime_parts[$mime_id])
return $this->opt['get_url'] . "&_part=" . $mime_id;
else
return false;
}
/**
* Get content of a specific part of this message
*
* @param string Part MIME-ID
* @param resource File pointer to save the message part
* @return string Part content
*/
public function get_part_content($mime_id, $fp=NULL)
{
if ($part = $this->mime_parts[$mime_id])
return $this->imap->get_message_part($this->uid, $mime_id, $part, NULL, $fp);
else
return null;
}
/**
* Determine if the message contains a HTML part
*
* @return bool True if a HTML is available, False if not
*/
function has_html_part()
{
// check all message parts
foreach ($this->parts as $pid => $part) {
$mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
if ($mimetype == 'text/html')
return true;
}
return false;
}
/**
* Return the first HTML part of this message
*
* @return string HTML message part content
*/
function first_html_part()
{
// check all message parts
foreach ($this->mime_parts as $mime_id => $part) {
$mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
if ($mimetype == 'text/html') {
return $this->imap->get_message_part($this->uid, $mime_id, $part);
}
}
}
/**
* Return the first text part of this message
*
* @return string Plain text message/part content
*/
function first_text_part()
{
// no message structure, return complete body
if (empty($this->parts))
return $this->body;
$out = null;
// check all message parts
foreach ($this->mime_parts as $mime_id => $part) {
$mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
if ($mimetype == 'text/plain') {
$out = $this->imap->get_message_part($this->uid, $mime_id, $part);
break;
}
else if ($mimetype == 'text/html') {
$html_part = $this->imap->get_message_part($this->uid, $mime_id, $part);
// remove special chars encoding
$trans = array_flip(get_html_translation_table(HTML_ENTITIES));
$html_part = strtr($html_part, $trans);
// create instance of html2text class
$txt = new html2text($html_part);
$out = $txt->get_text();
break;
}
}
return $out;
}
/**
* Raad the message structure returend by the IMAP server
* and build flat lists of content parts and attachments
*
* @param object rcube_message_part Message structure node
* @param bool True when called recursively
*/
private function parse_structure($structure, $recursive = false)
{
$message_ctype_primary = $structure->ctype_primary;
$message_ctype_secondary = $structure->ctype_secondary;
$mimetype = $structure->mimetype;
// real content-type of message/rfc822 part
if ($mimetype == 'message/rfc822') {
if ($structure->real_mimetype) {
$mimetype = $structure->real_mimetype;
list($message_ctype_primary, $message_ctype_secondary) = explode('/', $mimetype);
}
}
// show message headers
if ($recursive && is_array($structure->headers) && isset($structure->headers['subject'])) {
$c = new stdClass;
$c->type = 'headers';
$c->headers = &$structure->headers;
$this->parts[] = $c;
}
// print body if message doesn't have multiple parts
if ($message_ctype_primary == 'text' && !$recursive) {
$structure->type = 'content';
$this->parts[] = &$structure;
}
// the same for pgp signed messages
else if ($mimetype == 'application/pgp' && !$recursive) {
$structure->type = 'content';
$this->parts[] = &$structure;
}
// message contains alternative parts
else if ($mimetype == 'multipart/alternative' && is_array($structure->parts)) {
// get html/plaintext parts
$plain_part = $html_part = $print_part = $related_part = null;
foreach ($structure->parts as $p => $sub_part) {
$sub_mimetype = $sub_part->mimetype;
// check if sub part is
if ($sub_mimetype == 'text/plain')
$plain_part = $p;
else if ($sub_mimetype == 'text/html')
$html_part = $p;
else if ($sub_mimetype == 'text/enriched')
$enriched_part = $p;
else if (in_array($sub_mimetype, array('multipart/related', 'multipart/mixed', 'multipart/alternative')))
$related_part = $p;
}
// parse related part (alternative part could be in here)
if ($related_part !== null && !$this->parse_alternative) {
$this->parse_alternative = true;
$this->parse_structure($structure->parts[$related_part], true);
$this->parse_alternative = false;
// if plain part was found, we should unset it if html is preferred
if ($this->opt['prefer_html'] && count($this->parts))
$plain_part = null;
}
// choose html/plain part to print
if ($html_part !== null && $this->opt['prefer_html']) {
$print_part = &$structure->parts[$html_part];
}
else if ($enriched_part !== null) {
$print_part = &$structure->parts[$enriched_part];
}
else if ($plain_part !== null) {
$print_part = &$structure->parts[$plain_part];
}
// add the right message body
if (is_object($print_part)) {
$print_part->type = 'content';
$this->parts[] = $print_part;
}
// show plaintext warning
else if ($html_part !== null && empty($this->parts)) {
$c = new stdClass;
$c->type = 'content';
$c->body = rcube_label('htmlmessage');
$c->ctype_primary = 'text';
$c->ctype_secondary = 'plain';
$this->parts[] = $c;
}
// add html part as attachment
if ($html_part !== null && $structure->parts[$html_part] !== $print_part) {
$html_part = &$structure->parts[$html_part];
$html_part->filename = rcube_label('htmlmessage');
$html_part->mimetype = 'text/html';
$this->attachments[] = $html_part;
}
}
// this is an ecrypted message -> create a plaintext body with the according message
else if ($mimetype == 'multipart/encrypted') {
$p = new stdClass;
$p->type = 'content';
$p->ctype_primary = 'text';
$p->ctype_secondary = 'plain';
$p->body = rcube_label('encryptedmessage');
$p->size = strlen($p->body);
// maybe some plugins are able to decode this encrypted message part
$data = $this->app->plugins->exec_hook('message_part_encrypted', array('object' => $this, 'struct' => $structure, 'part' => $p));
if (is_array($data['parts'])) {
$this->parts = array_merge($this->parts, $data['parts']);
}
else if ($data['part']) {
$this->parts[] = $p;
}
}
// message contains multiple parts
else if (is_array($structure->parts) && !empty($structure->parts)) {
// iterate over parts
for ($i=0; $i < count($structure->parts); $i++) {
$mail_part = &$structure->parts[$i];
$primary_type = $mail_part->ctype_primary;
$secondary_type = $mail_part->ctype_secondary;
// real content-type of message/rfc822
if ($mail_part->real_mimetype) {
$part_orig_mimetype = $mail_part->mimetype;
$part_mimetype = $mail_part->real_mimetype;
list($primary_type, $secondary_type) = explode('/', $part_mimetype);
}
else
$part_mimetype = $mail_part->mimetype;
// multipart/alternative
if ($primary_type=='multipart') {
$this->parse_structure($mail_part, true);
// list message/rfc822 as attachment as well (mostly .eml)
if ($part_orig_mimetype == 'message/rfc822' && !empty($mail_part->filename))
$this->attachments[] = $mail_part;
}
// part text/[plain|html] OR message/delivery-status
else if ((($part_mimetype == 'text/plain' || $part_mimetype == 'text/html') && $mail_part->disposition != 'attachment') ||
$part_mimetype == 'message/delivery-status' || $part_mimetype == 'message/disposition-notification') {
// add text part if it matches the prefs
if (!$this->parse_alternative ||
($secondary_type == 'html' && $this->opt['prefer_html']) ||
($secondary_type == 'plain' && !$this->opt['prefer_html'])) {
$mail_part->type = 'content';
$this->parts[] = $mail_part;
}
// list as attachment as well
if (!empty($mail_part->filename))
$this->attachments[] = $mail_part;
}
// part message/*
else if ($primary_type=='message') {
$this->parse_structure($mail_part, true);
// list as attachment as well (mostly .eml)
if (!empty($mail_part->filename))
$this->attachments[] = $mail_part;
}
// ignore "virtual" protocol parts
else if ($primary_type == 'protocol')
continue;
// part is Microsoft Outlook TNEF (winmail.dat)
else if ($part_mimetype == 'application/ms-tnef') {
foreach ((array)$this->imap->tnef_decode($mail_part, $structure->headers['uid']) as $tnef_part) {
$this->mime_parts[$tnef_part->mime_id] = $tnef_part;
$this->attachments[] = $tnef_part;
}
}
// part is a file/attachment
else if (preg_match('/^(inline|attach)/', $mail_part->disposition) ||
$mail_part->headers['content-id'] || (empty($mail_part->disposition) && $mail_part->filename)) {
// skip apple resource forks
if ($message_ctype_secondary == 'appledouble' && $secondary_type == 'applefile')
continue;
// part belongs to a related message and is linked
if ($mimetype == 'multipart/related'
&& preg_match('!^image/!', $part_mimetype)
&& ($mail_part->headers['content-id'] || $mail_part->headers['content-location'])) {
if ($mail_part->headers['content-id'])
$mail_part->content_id = preg_replace(array('/^</', '/>$/'), '', $mail_part->headers['content-id']);
if ($mail_part->headers['content-location'])
$mail_part->content_location = $mail_part->headers['content-base'] . $mail_part->headers['content-location'];
$this->inline_parts[] = $mail_part;
}
// is a regular attachment
else if (preg_match('!^[a-z0-9-.+]+/[a-z0-9-.+]+$!i', $part_mimetype)) {
if (!$mail_part->filename)
$mail_part->filename = 'Part '.$mail_part->mime_id;
$this->attachments[] = $mail_part;
}
}
}
// if this was a related part try to resolve references
if ($mimetype == 'multipart/related' && sizeof($this->inline_parts)) {
$a_replaces = array();
foreach ($this->inline_parts as $inline_object) {
$part_url = $this->get_part_url($inline_object->mime_id);
if ($inline_object->content_id)
$a_replaces['cid:'.$inline_object->content_id] = $part_url;
if ($inline_object->content_location)
$a_replaces[$inline_object->content_location] = $part_url;
}
// add replace array to each content part
// (will be applied later when part body is available)
foreach ($this->parts as $i => $part) {
if ($part->type == 'content')
$this->parts[$i]->replaces = $a_replaces;
}
}
}
// message is a single part non-text
else if ($structure->filename) {
$this->attachments[] = $structure;
}
}
/**
* Fill aflat array with references to all parts, indexed by part numbers
*
* @param object rcube_message_part Message body structure
*/
private function get_mime_numbers(&$part)
{
if (strlen($part->mime_id))
$this->mime_parts[$part->mime_id] = &$part;
if (is_array($part->parts))
for ($i=0; $i<count($part->parts); $i++)
$this->get_mime_numbers($part->parts[$i]);
}
}

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