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<?php
#
# forum-list bridge
# Copyright (C) 2010 Joel Uckelman
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
require_once(__DIR__ . '/Message.php');
abstract class EmailMessage implements Message {
protected $data;
protected $msg;
protected $parts;
public function __construct($input) {
$this->data = &$input;
# build the message structure
$this->msg = mailparse_msg_create();
mailparse_msg_parse($this->msg, $this->data);
# get the part data
$this->parts = array();
foreach (mailparse_msg_get_structure($this->msg) as $part_id) {
$part = mailparse_msg_get_part($this->msg, $part_id);
$this->parts[$part_id] = mailparse_msg_get_part_data($part);
}
}
public function __destruct() {
mailparse_msg_free($this->msg);
}
public function getPostId() {
return null;
}
protected function getHeader($name) {
return $this->getPartHeader($this->parts[1], $name);
}
protected function getPartHeaders(&$part_data) {
$headers = &$part_data['headers'];
return $headers;
}
protected function getPartHeader(&$part_data, $name) {
$headers = $this->getPartHeaders($part_data);
return array_key_exists($name, $headers) ? $headers[$name] : false;
}
public function getFrom() {
$from = mailparse_rfc822_parse_addresses($this->getHeader('from'));
return $from[0]['address'];
}
public function getSubject() {
return $this->getHeader('subject');
}
public function getMessageId() {
return $this->getHeader('message-id');
}
public function getInReplyTo() {
$irt = $this->getHeader('in-reply-to');
// Try to get a message id from the In-Reply-To header
foreach (mailparse_rfc822_parse_addresses($irt) as $part) {
if (isset($part['address']) && strlen($part['address']) > 0) {
return '<' . $part['address'] . '>';
}
}
// Ack, no message id, just return the raw header
return $irt;
}
public function getReferences() {
return $this->getHeader('references');
}
public function getParts() {
}
protected function getPartBody(&$part_data) {
$beg = $part_data['starting-pos-body'];
$end = $part_data['ending-pos-body'];
return substr($this->data, $beg, $end-$beg);
}
protected function decode($str, $encoding) {
if ($encoding == 'base64') {
return base64_decode($str);
}
else if ($encoding == 'quoted-printable') {
return quoted_printable_decode($str);
}
else {
return $str;
}
}
public function getFlattenedParts() {
$text = '';
$attachments = array();
$this->flatten_parts('1', $this->parts[1], $text, $attachments);
return array($text, $attachments);
}
protected function flatten_subparts($part_id, &$text, &$attachments) {
for ($i = 1, $child_id = "$part_id.$i";
array_key_exists($child_id, $this->parts);
++$i, $child_id = "$part_id.$i")
{
$child = $this->parts[$child_id];
$this->flatten_parts($child_id, $child, $text, $attachments);
}
}
protected function flatten_parts($part_id, &$part_data,
&$text, &$attachments) {
$type = $part_data['content-type'];
list($major, $minor) = split('/', $type, 2);
switch ($major) {
case 'multipart':
switch ($minor) {
case 'alternative':
# check alternatives for text/plain
$plain = false;
for ($i = 1, $child_id = "$part_id.$i";
array_key_exists($child_id, $this->parts);
++$i, $child_id = "$part_id.$i")
{
$child = $this->parts[$child_id];
$ctype = $child['content-type'];
if ($ctype == 'text/plain') {
# keep text/plain, chuck the rest
$this->flatten_parts($child_id, $child, $text, $attachments);
$plain = true;
break;
}
}
if (!$plain) {
# no text/plain, handle the subparts as attachments
$this->flatten_subparts($part_id, $text, $attachments);
}
break;
case 'mixed':
default:
# handle all subparts
$this->flatten_subparts($part_id, $text, $attachments);
break;
}
break;
case 'text':
# NB: We don't worry about text/html here because Mailman will have
# already stripped it.
# Text is appended to the main text.
$enc = $this->getPartHeader($part_data, 'content-transfer-encoding');
$body = $this->getPartBody($part_data);
$body = $this->decode($body, $enc);
$charset = $part_data['content-charset'];
if (strtoupper($charset) != 'UTF-8') {
if (mb_check_encoding($body, $charset)) {
$body = mb_convert_encoding($body, 'UTF-8', $charset);
}
else {
$body = mb_convert_encoding($body, 'UTF-8');
}
}
$text .= "$body\n";
break;
default:
# Everything else goes into phpBB as an attachment.
$enc = $this->getPartHeader($part_data, 'content-transfer-encoding');
$data = $this->getPartBody($part_data);
$data = $this->decode($data, $enc);
$disp = $part_data['content-disposition'];
if ($disp == 'attachment' || $disp == 'inline') {
$attachments[] = array(
'filename' => $part_data['disposition-filename'],
'mimetype' => $part_data['content-type'],
'comment' => $part_data['content-description'],
'data' => $data
);
}
}
}
}
?>
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