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rcube_mime_struct.php
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rcube_mime_struct.php
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<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcube_mime_struct.php |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2005-2010, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Provide functions for handling mime messages structure |
| |
| Based on Iloha MIME Library. See http://ilohamail.org/ for details |
| |
+-----------------------------------------------------------------------+
| Author: Aleksander Machniak <alec@alec.pl> |
| Author: Ryo Chijiiwa <Ryo@IlohaMail.org> |
+-----------------------------------------------------------------------+
$Id$
*/
class rcube_mime_struct
{
private $structure;
function __construct($str=null)
{
if ($str)
$this->structure = $this->parseStructure($str);
}
/*
* Parses IMAP's BODYSTRUCTURE string into array
*/
function parseStructure($str)
{
$line = substr($str, 1, strlen($str) - 2);
$line = str_replace(')(', ') (', $line);
$struct = self::parseBSString($line);
if (!is_array($struct[0]) && (strcasecmp($struct[0], 'message') == 0)
&& (strcasecmp($struct[1], 'rfc822') == 0)) {
$struct = array($struct);
}
return $struct;
}
/*
* Parses IMAP's BODYSTRUCTURE string into array and loads it into class internal variable
*/
function loadStructure($str)
{
if (empty($str))
return true;
$this->structure = $this->parseStructure($str);
return (!empty($this->structure));
}
function getPartType($part)
{
$part_a = $this->getPartArray($this->structure, $part);
if (!empty($part_a)) {
if (is_array($part_a[0]))
return 'multipart';
else if ($part_a[0])
return $part_a[0];
}
return 'other';
}
function getPartEncoding($part)
{
$part_a = $this->getPartArray($this->structure, $part);
if ($part_a) {
if (!is_array($part_a[0]))
return $part_a[5];
}
return '';
}
function getPartCharset($part)
{
$part_a = $this->getPartArray($this->structure, $part);
if ($part_a) {
if (is_array($part_a[0]))
return '';
else {
if (is_array($part_a[2])) {
$name = '';
while (list($key, $val) = each($part_a[2]))
if (strcasecmp($val, 'charset') == 0)
return $part_a[2][$key+1];
}
}
}
return '';
}
function getPartArray($a, $part)
{
if (!is_array($a)) {
return false;
}
if (strpos($part, '.') > 0) {
$original_part = $part;
$pos = strpos($part, '.');
$rest = substr($original_part, $pos+1);
$part = substr($original_part, 0, $pos);
if ((strcasecmp($a[0], 'message') == 0) && (strcasecmp($a[1], 'rfc822') == 0)) {
$a = $a[8];
}
return self::getPartArray($a[$part-1], $rest);
}
else if ($part>0) {
if (!is_array($a[0]) && (strcasecmp($a[0], 'message') == 0)
&& (strcasecmp($a[1], 'rfc822') == 0)) {
$a = $a[8];
}
if (is_array($a[$part-1]))
return $a[$part-1];
else
return $a;
}
else if (($part==0) || (empty($part))) {
return $a;
}
}
private function closingParenPos($str, $start)
{
$level = 0;
$len = strlen($str);
$in_quote = 0;
for ($i=$start; $i<$len; $i++) {
if ($str[$i] == '"' && $str[$i-1] != "\\") {
$in_quote = ($in_quote + 1) % 2;
}
if (!$in_quote) {
if ($str[$i] == '(')
$level++;
else if (($level > 0) && ($str[$i] == ')'))
$level--;
else if (($level == 0) && ($str[$i] == ')'))
return $i;
}
}
}
/*
* Parses IMAP's BODYSTRUCTURE string into array
*/
private function parseBSString($str)
{
$id = 0;
$a = array();
$len = strlen($str);
$in_quote = 0;
for ($i=0; $i<$len; $i++) {
if ($str[$i] == '"') {
$in_quote = ($in_quote + 1) % 2;
} else if (!$in_quote) {
// space means new element
if ($str[$i] == ' ') {
$id++;
// skip additional spaces
while ($str[$i+1] == ' ')
$i++;
// new part
} else if ($str[$i] == '(') {
$i++;
$endPos = self::closingParenPos($str, $i);
$partLen = $endPos - $i;
if ($partLen < 0)
break;
$part = substr($str, $i, $partLen);
$a[$id] = self::parseBSString($part); // send part string
$i = $endPos;
} else
$a[$id] .= $str[$i]; //add to current element in array
} else if ($in_quote) {
if ($str[$i] == "\\") {
$i++; // escape backslashes
if ($str[$i] == '"' || $str[$i] == "\\")
$a[$id] .= $str[$i];
}
else
$a[$id] .= $str[$i]; //add to current element in array
}
}
reset($a);
return $a;
}
}

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