githubFork/roundcubemail.git

Aleksander Machniak

2016-05-05 4921c21cff15b9ba2a5a05b2145861b01c9e85d6

commit \| author \| age
59c216	1	<?php
A	2
a95874	3	/**
59c216	4	+-----------------------------------------------------------------------+
e019f2	5	\| This file is part of the Roundcube Webmail client \|
86b241	6	\| Copyright (C) 2005-2015, The Roundcube Dev Team \|
1aceb9	7	\| Copyright (C) 2011-2012, Kolab Systems AG \|
7fe381	8	\| \|
T	9	\| Licensed under the GNU General Public License version 3 or \|
	10	\| any later version with exceptions for skins & plugins. \|
	11	\| See the README file for a full license statement. \|
59c216	12	\| \|
A	13	\| PURPOSE: \|
	14	\| Provide alternative IMAP library that doesn't rely on the standard \|
	15	\| C-Client based version. This allows to function regardless \|
	16	\| of whether or not the PHP build it's running on has IMAP \|
	17	\| functionality built-in. \|
	18	\| \|
	19	\| Based on Iloha IMAP Library. See http://ilohamail.org/ for details \|
	20	+-----------------------------------------------------------------------+
	21	\| Author: Aleksander Machniak <alec@alec.pl> \|
	22	\| Author: Ryo Chijiiwa <Ryo@IlohaMail.org> \|
	23	+-----------------------------------------------------------------------+
	24	*/
	25
d062db	26	/**
T	27	* PHP based wrapper class to connect to an IMAP server
	28	*
9ab346	29	* @package Framework
AM	30	* @subpackage Storage
d062db	31	*/
59c216	32	class rcube_imap_generic
A	33	{
	34	public $error;
	35	public $errornum;
90f81a	36	public $result;
A	37	public $resultcode;
80152b	38	public $selected;
a2e8cb	39	public $data = array();
59c216	40	public $flags = array(
A	41	'SEEN' => '\\Seen',
	42	'DELETED' => '\\Deleted',
	43	'ANSWERED' => '\\Answered',
	44	'DRAFT' => '\\Draft',
	45	'FLAGGED' => '\\Flagged',
	46	'FORWARDED' => '$Forwarded',
	47	'MDNSENT' => '$MDNSent',
	48	'' => '\\',
	49	);
	50
232bcd	51	protected $fp;
AM	52	protected $host;
	53	protected $prefs;
	54	protected $cmd_tag;
	55	protected $cmd_num = 0;
	56	protected $resourceid;
86b241	57	protected $logged = false;
AM	58	protected $capability = array();
	59	protected $capability_readed = false;
	60	protected $debug = false;
	61	protected $debug_handler = false;
59c216	62
86b241	63	const ERROR_OK = 0;
AM	64	const ERROR_NO = -1;
	65	const ERROR_BAD = -2;
	66	const ERROR_BYE = -3;
	67	const ERROR_UNKNOWN = -4;
	68	const ERROR_COMMAND = -5;
90f81a	69	const ERROR_READONLY = -6;
854cf2	70
A	71	const COMMAND_NORESPONSE = 1;
781f0c	72	const COMMAND_CAPABILITY = 2;
d903fb	73	const COMMAND_LASTLINE = 4;
774dea	74	const COMMAND_ANONYMIZED = 8;
8fcc3e	75
43079d	76	const DEBUG_LINE_LENGTH = 4098; // 4KB + 2B for \r\n
9b8d22	77
1d5165	78
2b4283	79	/**
A	80	* Send simple (one line) command to the connection stream
	81	*
86b241	82	* @param string $string Command string
AM	83	* @param bool $endln True if CRLF need to be added at the end of command
774dea	84	* @param bool $anonymized Don't write the given data to log but a placeholder
2b4283	85	*
A	86	* @param int Number of bytes sent, False on error
	87	*/
354cff	88	protected function putLine($string, $endln = true, $anonymized = false)
59c216	89	{
86b241	90	if (!$this->fp) {
59c216	91	return false;
86b241	92	}
59c216	93
86b241	94	if ($this->debug) {
774dea	95	// anonymize the sent command for logging
TB	96	$cut = $endln ? 2 : 0;
	97	if ($anonymized && preg_match('/^(A\d+ (?:[A-Z]+ )+)(.+)/', $string, $m)) {
	98	$log = $m[1] . sprintf('****** [%d]', strlen($m[2]) - $cut);
	99	}
	100	else if ($anonymized) {
	101	$log = sprintf('****** [%d]', strlen($string) - $cut);
	102	}
	103	else {
	104	$log = rtrim($string);
	105	}
86b241	106
774dea	107	$this->debug('C: ' . $log);
c2c820	108	}
1d5165	109
746209	110	if ($endln) {
AM	111	$string .= "\r\n";
	112	}
	113
	114	$res = fwrite($this->fp, $string);
ed302b	115
c2c820	116	if ($res === false) {
A	117	@fclose($this->fp);
	118	$this->fp = null;
	119	}
ed302b	120
A	121	return $res;
59c216	122	}
A	123
2b4283	124	/**
A	125	* Send command to the connection stream with Command Continuation
	126	* Requests (RFC3501 7.5) and LITERAL+ (RFC2088) support
	127	*
86b241	128	* @param string $string Command string
AM	129	* @param bool $endln True if CRLF need to be added at the end of command
774dea	130	* @param bool $anonymized Don't write the given data to log but a placeholder
2b4283	131	*
e361bf	132	* @return int\|bool Number of bytes sent, False on error
2b4283	133	*/
354cff	134	protected function putLineC($string, $endln=true, $anonymized=false)
59c216	135	{
e361bf	136	if (!$this->fp) {
a5c56b	137	return false;
e361bf	138	}
59c216	139
e361bf	140	if ($endln) {
c2c820	141	$string .= "\r\n";
e361bf	142	}
b5fb21	143
c2c820	144	$res = 0;
A	145	if ($parts = preg_split('/(\{[0-9]+\}\r\n)/m', $string, -1, PREG_SPLIT_DELIM_CAPTURE)) {
	146	for ($i=0, $cnt=count($parts); $i<$cnt; $i++) {
b5fb21	147	if (preg_match('/^\{([0-9]+)\}\r\n$/', $parts[$i+1], $matches)) {
d83351	148	// LITERAL+ support
b5fb21	149	if ($this->prefs['literal+']) {
A	150	$parts[$i+1] = sprintf("{%d+}\r\n", $matches[1]);
	151	}
a85f88	152
774dea	153	$bytes = $this->putLine($parts[$i].$parts[$i+1], false, $anonymized);
86b241	154	if ($bytes === false) {
59c216	155	return false;
86b241	156	}
AM	157
59c216	158	$res += $bytes;
d83351	159
A	160	// don't wait if server supports LITERAL+ capability
	161	if (!$this->prefs['literal+']) {
c2c820	162	$line = $this->readLine(1000);
A	163	// handle error in command
86b241	164	if ($line[0] != '+') {
c2c820	165	return false;
86b241	166	}
c2c820	167	}
86b241	168
d83351	169	$i++;
c2c820	170	}
A	171	else {
774dea	172	$bytes = $this->putLine($parts[$i], false, $anonymized);
86b241	173	if ($bytes === false) {
59c216	174	return false;
86b241	175	}
AM	176
59c216	177	$res += $bytes;
A	178	}
c2c820	179	}
A	180	}
746209	181
c2c820	182	return $res;
59c216	183	}
A	184
e361bf	185	/**
A	186	* Reads line from the connection stream
	187	*
86b241	188	* @param int $size Buffer size
e361bf	189	*
A	190	* @return string Line of text response
	191	*/
354cff	192	protected function readLine($size = 1024)
59c216	193	{
c2c820	194	$line = '';
59c216	195
c2c820	196	if (!$size) {
A	197	$size = 1024;
	198	}
1d5165	199
c2c820	200	do {
3e3981	201	if ($this->eof()) {
7e3298	202	return $line ?: null;
c2c820	203	}
1d5165	204
c2c820	205	$buffer = fgets($this->fp, $size);
59c216	206
c2c820	207	if ($buffer === false) {
3e3981	208	$this->closeSocket();
c2c820	209	break;
A	210	}
86b241	211
AM	212	if ($this->debug) {
7f1da4	213	$this->debug('S: '. rtrim($buffer));
c2c820	214	}
86b241	215
59c216	216	$line .= $buffer;
354cff	217	}
AM	218	while (substr($buffer, -1) != "\n");
59c216	219
c2c820	220	return $line;
59c216	221	}
A	222
e361bf	223	/**
A	224	* Reads more data from the connection stream when provided
	225	* data contain string literal
	226	*
	227	* @param string $line Response text
	228	* @param bool $escape Enables escaping
	229	*
	230	* @return string Line of text response
	231	*/
354cff	232	protected function multLine($line, $escape = false)
59c216	233	{
c2c820	234	$line = rtrim($line);
80152b	235	if (preg_match('/\{([0-9]+)\}$/', $line, $m)) {
A	236	$out = '';
	237	$str = substr($line, 0, -strlen($m[0]));
	238	$bytes = $m[1];
1d5165	239
c2c820	240	while (strlen($out) < $bytes) {
A	241	$line = $this->readBytes($bytes);
86b241	242	if ($line === null) {
c2c820	243	break;
86b241	244	}
AM	245
c2c820	246	$out .= $line;
A	247	}
59c216	248
80152b	249	$line = $str . ($escape ? $this->escape($out) : $out);
c2c820	250	}
1d5165	251
59c216	252	return $line;
A	253	}
	254
e361bf	255	/**
A	256	* Reads specified number of bytes from the connection stream
	257	*
86b241	258	* @param int $bytes Number of bytes to get
e361bf	259	*
A	260	* @return string Response text
	261	*/
354cff	262	protected function readBytes($bytes)
59c216	263	{
c2c820	264	$data = '';
A	265	$len = 0;
86b241	266
AM	267	while ($len < $bytes && !$this->eof()) {
c2c820	268	$d = fread($this->fp, $bytes-$len);
86b241	269	if ($this->debug) {
7f1da4	270	$this->debug('S: '. $d);
59c216	271	}
A	272	$data .= $d;
c2c820	273	$data_len = strlen($data);
A	274	if ($len == $data_len) {
	275	break; // nothing was read -> exit to avoid apache lockups
	276	}
	277	$len = $data_len;
	278	}
1d5165	279
c2c820	280	return $data;
59c216	281	}
A	282
e361bf	283	/**
A	284	* Reads complete response to the IMAP command
	285	*
86b241	286	* @param array $untagged Will be filled with untagged response lines
e361bf	287	*
A	288	* @return string Response text
	289	*/
354cff	290	protected function readReply(&$untagged = null)
59c216	291	{
c2c820	292	do {
A	293	$line = trim($this->readLine(1024));
1d5165	294	// store untagged response lines
86b241	295	if ($line[0] == '*') {
1d5165	296	$untagged[] = $line;
86b241	297	}
354cff	298	}
AM	299	while ($line[0] == '*');
1d5165	300
86b241	301	if ($untagged) {
1d5165	302	$untagged = join("\n", $untagged);
86b241	303	}
59c216	304
c2c820	305	return $line;
59c216	306	}
A	307
e361bf	308	/**
A	309	* Response parser.
	310	*
7fb0ae	311	* @param string $string Response text
AM	312	* @param string $err_prefix Error message prefix
e361bf	313	*
A	314	* @return int Response status
	315	*/
354cff	316	protected function parseResult($string, $err_prefix = '')
59c216	317	{
c2c820	318	if (preg_match('/^[a-z0-9]+ (OK\|NO\|BAD\|BYE)(.)$/i', trim($string), $matches)) {
A	319	$res = strtoupper($matches[1]);
8fcc3e	320	$str = trim($matches[2]);
A	321
c2c820	322	if ($res == 'OK') {
A	323	$this->errornum = self::ERROR_OK;
7fb0ae	324	}
AM	325	else if ($res == 'NO') {
8fcc3e	326	$this->errornum = self::ERROR_NO;
7fb0ae	327	}
AM	328	else if ($res == 'BAD') {
c2c820	329	$this->errornum = self::ERROR_BAD;
7fb0ae	330	}
AM	331	else if ($res == 'BYE') {
3e3981	332	$this->closeSocket();
c2c820	333	$this->errornum = self::ERROR_BYE;
A	334	}
8fcc3e	335
90f81a	336	if ($str) {
A	337	$str = trim($str);
	338	// get response string and code (RFC5530)
	339	if (preg_match("/^\[([a-z-]+)\]/i", $str, $m)) {
	340	$this->resultcode = strtoupper($m[1]);
	341	$str = trim(substr($str, strlen($m[1]) + 2));
	342	}
	343	else {
	344	$this->resultcode = null;
765fde	345	// parse response for [APPENDUID 1204196876 3456]
397976	346	if (preg_match("/^\[APPENDUID [0-9]+ ([0-9]+)\]/i", $str, $m)) {
765fde	347	$this->data['APPENDUID'] = $m[1];
397976	348	}
AM	349	// parse response for [COPYUID 1204196876 3456:3457 123:124]
	350	else if (preg_match("/^\[COPYUID [0-9]+ ([0-9,:]+) ([0-9,:]+)\]/i", $str, $m)) {
	351	$this->data['COPYUID'] = array($m[1], $m[2]);
765fde	352	}
90f81a	353	}
7fb0ae	354
90f81a	355	$this->result = $str;
A	356
	357	if ($this->errornum != self::ERROR_OK) {
	358	$this->error = $err_prefix ? $err_prefix.$str : $str;
	359	}
	360	}
8fcc3e	361
c2c820	362	return $this->errornum;
A	363	}
86b241	364
c2c820	365	return self::ERROR_UNKNOWN;
8fcc3e	366	}
A	367
e361bf	368	/**
A	369	* Checks connection stream state.
	370	*
	371	* @return bool True if connection is closed
	372	*/
232bcd	373	protected function eof()
3e3981	374	{
A	375	if (!is_resource($this->fp)) {
	376	return true;
	377	}
	378
	379	// If a connection opened by fsockopen() wasn't closed
	380	// by the server, feof() will hang.
	381	$start = microtime(true);
	382
e361bf	383	if (feof($this->fp) \|\|
3e3981	384	($this->prefs['timeout'] && (microtime(true) - $start > $this->prefs['timeout']))
A	385	) {
	386	$this->closeSocket();
	387	return true;
	388	}
	389
	390	return false;
	391	}
	392
e361bf	393	/**
A	394	* Closes connection stream.
	395	*/
232bcd	396	protected function closeSocket()
3e3981	397	{
A	398	@fclose($this->fp);
	399	$this->fp = null;
	400	}
	401
e361bf	402	/**
A	403	* Error code/message setter.
	404	*/
7fb0ae	405	protected function setError($code, $msg = '')
8fcc3e	406	{
A	407	$this->errornum = $code;
	408	$this->error = $msg;
59c216	409	}
A	410
e361bf	411	/**
A	412	* Checks response status.
	413	* Checks if command response line starts with specified prefix (or * BYE/BAD)
	414	*
	415	* @param string $string Response text
	416	* @param string $match Prefix to match with (case-sensitive)
	417	* @param bool $error Enables BYE/BAD checking
	418	* @param bool $nonempty Enables empty response checking
	419	*
	420	* @return bool True any check is true or connection is closed.
	421	*/
7fb0ae	422	protected function startsWith($string, $match, $error = false, $nonempty = false)
59c216	423	{
A	424	if (!$this->fp) {
	425	return true;
	426	}
86b241	427
e361bf	428	if (strncmp($string, $match, strlen($match)) == 0) {
c2c820	429	return true;
A	430	}
86b241	431
c2c820	432	if ($error && preg_match('/^\* (BYE\|BAD) /i', $string, $m)) {
59c216	433	if (strtoupper($m[1]) == 'BYE') {
3e3981	434	$this->closeSocket();
59c216	435	}
c2c820	436	return true;
A	437	}
86b241	438
59c216	439	if ($nonempty && !strlen($string)) {
A	440	return true;
	441	}
86b241	442
c2c820	443	return false;
59c216	444	}
A	445
7fb0ae	446	/**
AM	447	* Capabilities checker
	448	*/
232bcd	449	protected function hasCapability($name)
59c216	450	{
eabd44	451	if (empty($this->capability) \|\| $name == '') {
A	452	return false;
	453	}
	454
c2c820	455	if (in_array($name, $this->capability)) {
A	456	return true;
eabd44	457	}
A	458	else if (strpos($name, '=')) {
	459	return false;
	460	}
	461
	462	$result = array();
	463	foreach ($this->capability as $cap) {
	464	$entry = explode('=', $cap);
	465	if ($entry[0] == $name) {
	466	$result[] = $entry[1];
	467	}
	468	}
	469
7e3298	470	return $result ?: false;
eabd44	471	}
A	472
	473	/**
	474	* Capabilities checker
	475	*
	476	* @param string $name Capability name
	477	*
	478	* @return mixed Capability values array for key=value pairs, true/false for others
	479	*/
7fb0ae	480	public function getCapability($name)
eabd44	481	{
A	482	$result = $this->hasCapability($name);
	483
	484	if (!empty($result)) {
	485	return $result;
c2c820	486	}
A	487	else if ($this->capability_readed) {
	488	return false;
	489	}
59c216	490
c2c820	491	// get capabilities (only once) because initial
A	492	// optional CAPABILITY response may differ
854cf2	493	$result = $this->execute('CAPABILITY');
59c216	494
854cf2	495	if ($result[0] == self::ERROR_OK) {
A	496	$this->parseCapability($result[1]);
59c216	497	}
1d5165	498
c2c820	499	$this->capability_readed = true;
59c216	500
eabd44	501	return $this->hasCapability($name);
59c216	502	}
A	503
7fb0ae	504	/**
AM	505	* Clears detected server capabilities
	506	*/
	507	public function clearCapability()
59c216	508	{
86b241	509	$this->capability = array();
c2c820	510	$this->capability_readed = false;
59c216	511	}
A	512
7bf255	513	/**
4dd417	514	* DIGEST-MD5/CRAM-MD5/PLAIN Authentication
7bf255	515	*
86b241	516	* @param string $user Username
AM	517	* @param string $pass Password
4dd417	518	* @param string $type Authentication type (PLAIN/CRAM-MD5/DIGEST-MD5)
7bf255	519	*
A	520	* @return resource Connection resourse on success, error code on error
	521	*/
7fb0ae	522	protected function authenticate($user, $pass, $type = 'PLAIN')
59c216	523	{
4dd417	524	if ($type == 'CRAM-MD5' \|\| $type == 'DIGEST-MD5') {
A	525	if ($type == 'DIGEST-MD5' && !class_exists('Auth_SASL')) {
c0ed78	526	$this->setError(self::ERROR_BYE,
4dd417	527	"The Auth_SASL package is required for DIGEST-MD5 authentication");
c2c820	528	return self::ERROR_BAD;
7bf255	529	}
A	530
c2c820	531	$this->putLine($this->nextTag() . " AUTHENTICATE $type");
A	532	$line = trim($this->readReply());
7bf255	533
c2c820	534	if ($line[0] == '+') {
A	535	$challenge = substr($line, 2);
7bf255	536	}
A	537	else {
4dd417	538	return $this->parseResult($line);
c2c820	539	}
7bf255	540
4dd417	541	if ($type == 'CRAM-MD5') {
A	542	// RFC2195: CRAM-MD5
	543	$ipad = '';
	544	$opad = '';
7bf255	545
4dd417	546	// initialize ipad, opad
A	547	for ($i=0; $i<64; $i++) {
	548	$ipad .= chr(0x36);
	549	$opad .= chr(0x5C);
	550	}
	551
	552	// pad $pass so it's 64 bytes
	553	$padLen = 64 - strlen($pass);
	554	for ($i=0; $i<$padLen; $i++) {
	555	$pass .= chr(0);
	556	}
	557
	558	// generate hash
	559	$hash = md5($this->_xor($pass, $opad) . pack("H*",
	560	md5($this->_xor($pass, $ipad) . base64_decode($challenge))));
	561	$reply = base64_encode($user . ' ' . $hash);
	562
	563	// send result
774dea	564	$this->putLine($reply, true, true);
4dd417	565	}
A	566	else {
	567	// RFC2831: DIGEST-MD5
	568	// proxy authorization
	569	if (!empty($this->prefs['auth_cid'])) {
	570	$authc = $this->prefs['auth_cid'];
	571	$pass = $this->prefs['auth_pw'];
	572	}
	573	else {
	574	$authc = $user;
4e383e	575	$user = '';
4dd417	576	}
7fb0ae	577
4dd417	578	$auth_sasl = Auth_SASL::factory('digestmd5');
7fb0ae	579	$reply = base64_encode($auth_sasl->getResponse($authc, $pass,
4dd417	580	base64_decode($challenge), $this->host, 'imap', $user));
A	581
	582	// send result
774dea	583	$this->putLine($reply, true, true);
406445	584	$line = trim($this->readReply());
a5e8e5	585
1b8ca0	586	if ($line[0] != '+') {
4dd417	587	return $this->parseResult($line);
A	588	}
	589
	590	// check response
1b8ca0	591	$challenge = substr($line, 2);
4dd417	592	$challenge = base64_decode($challenge);
A	593	if (strpos($challenge, 'rspauth=') === false) {
c0ed78	594	$this->setError(self::ERROR_BAD,
4dd417	595	"Unexpected response from server to DIGEST-MD5 response");
A	596	return self::ERROR_BAD;
	597	}
	598
	599	$this->putLine('');
	600	}
	601
7fb0ae	602	$line = $this->readReply();
1b8ca0	603	$result = $this->parseResult($line);
AM	604	}
7fb0ae	605	else if ($type == 'GSSAPI') {
1b8ca0	606	if (!extension_loaded('krb5')) {
AM	607	$this->setError(self::ERROR_BYE,
	608	"The krb5 extension is required for GSSAPI authentication");
	609	return self::ERROR_BAD;
	610	}
	611
	612	if (empty($this->prefs['gssapi_cn'])) {
	613	$this->setError(self::ERROR_BYE,
	614	"The gssapi_cn parameter is required for GSSAPI authentication");
	615	return self::ERROR_BAD;
	616	}
	617
	618	if (empty($this->prefs['gssapi_context'])) {
	619	$this->setError(self::ERROR_BYE,
	620	"The gssapi_context parameter is required for GSSAPI authentication");
	621	return self::ERROR_BAD;
	622	}
	623
	624	putenv('KRB5CCNAME=' . $this->prefs['gssapi_cn']);
	625
	626	try {
	627	$ccache = new KRB5CCache();
	628	$ccache->open($this->prefs['gssapi_cn']);
	629	$gssapicontext = new GSSAPIContext();
	630	$gssapicontext->acquireCredentials($ccache);
	631
	632	$token = '';
	633	$success = $gssapicontext->initSecContext($this->prefs['gssapi_context'], null, null, null, $token);
	634	$token = base64_encode($token);
	635	}
	636	catch (Exception $e) {
	637	trigger_error($e->getMessage(), E_USER_WARNING);
	638	$this->setError(self::ERROR_BYE, "GSSAPI authentication failed");
	639	return self::ERROR_BAD;
	640	}
	641
	642	$this->putLine($this->nextTag() . " AUTHENTICATE GSSAPI " . $token);
	643	$line = trim($this->readReply());
	644
	645	if ($line[0] != '+') {
	646	return $this->parseResult($line);
	647	}
	648
	649	try {
	650	$challenge = base64_decode(substr($line, 2));
	651	$gssapicontext->unwrap($challenge, $challenge);
	652	$gssapicontext->wrap($challenge, $challenge, true);
	653	}
	654	catch (Exception $e) {
	655	trigger_error($e->getMessage(), E_USER_WARNING);
	656	$this->setError(self::ERROR_BYE, "GSSAPI authentication failed");
	657	return self::ERROR_BAD;
	658	}
	659
	660	$this->putLine(base64_encode($challenge));
	661
	662	$line = $this->readReply();
7bf255	663	$result = $this->parseResult($line);
A	664	}
	665	else { // PLAIN
4dd417	666	// proxy authorization
a1fe6b	667	if (!empty($this->prefs['auth_cid'])) {
A	668	$authc = $this->prefs['auth_cid'];
	669	$pass = $this->prefs['auth_pw'];
	670	}
	671	else {
	672	$authc = $user;
4e383e	673	$user = '';
a1fe6b	674	}
A	675
	676	$reply = base64_encode($user . chr(0) . $authc . chr(0) . $pass);
7bf255	677
A	678	// RFC 4959 (SASL-IR): save one round trip
	679	if ($this->getCapability('SASL-IR')) {
d903fb	680	list($result, $line) = $this->execute("AUTHENTICATE PLAIN", array($reply),
774dea	681	self::COMMAND_LASTLINE \| self::COMMAND_CAPABILITY \| self::COMMAND_ANONYMIZED);
7bf255	682	}
A	683	else {
c2c820	684	$this->putLine($this->nextTag() . " AUTHENTICATE PLAIN");
A	685	$line = trim($this->readReply());
7bf255	686
c2c820	687	if ($line[0] != '+') {
A	688	return $this->parseResult($line);
	689	}
7bf255	690
A	691	// send result, get reply and process it
774dea	692	$this->putLine($reply, true, true);
7fb0ae	693	$line = $this->readReply();
7bf255	694	$result = $this->parseResult($line);
A	695	}
59c216	696	}
A	697
8fcc3e	698	if ($result == self::ERROR_OK) {
c2c820	699	// optional CAPABILITY response
A	700	if ($line && preg_match('/\[CAPABILITY ([^]]+)\]/i', $line, $matches)) {
	701	$this->parseCapability($matches[1], true);
	702	}
59c216	703	return $this->fp;
4dd417	704	}
A	705	else {
ad399a	706	$this->setError($result, "AUTHENTICATE $type: $line");
59c216	707	}
A	708
	709	return $result;
	710	}
	711
7bf255	712	/**
A	713	* LOGIN Authentication
	714	*
7fb0ae	715	* @param string $user Username
AM	716	* @param string $pass Password
7bf255	717	*
A	718	* @return resource Connection resourse on success, error code on error
	719	*/
7fb0ae	720	protected function login($user, $password)
59c216	721	{
854cf2	722	list($code, $response) = $this->execute('LOGIN', array(
128fd9	723	$this->escape($user), $this->escape($password)), self::COMMAND_CAPABILITY \| self::COMMAND_ANONYMIZED);
59c216	724
1d5165	725	// re-set capabilities list if untagged CAPABILITY response provided
c2c820	726	if (preg_match('/\* CAPABILITY (.+)/i', $response, $matches)) {
A	727	$this->parseCapability($matches[1], true);
	728	}
59c216	729
854cf2	730	if ($code == self::ERROR_OK) {
59c216	731	return $this->fp;
A	732	}
	733
854cf2	734	return $code;
59c216	735	}
A	736
2b4283	737	/**
e361bf	738	* Detects hierarchy delimiter
2b4283	739	*
00290a	740	* @return string The delimiter
59c216	741	*/
7fb0ae	742	public function getHierarchyDelimiter()
59c216	743	{
c2c820	744	if ($this->prefs['delimiter']) {
A	745	return $this->prefs['delimiter'];
	746	}
59c216	747
c2c820	748	// try (LIST "" ""), should return delimiter (RFC2060 Sec 6.3.8)
A	749	list($code, $response) = $this->execute('LIST',
	750	array($this->escape(''), $this->escape('')));
1d5165	751
854cf2	752	if ($code == self::ERROR_OK) {
A	753	$args = $this->tokenizeResponse($response, 4);
	754	$delimiter = $args[3];
59c216	755
c2c820	756	if (strlen($delimiter) > 0) {
A	757	return ($this->prefs['delimiter'] = $delimiter);
	758	}
854cf2	759	}
393ba7	760	}
A	761
fc7a41	762	/**
A	763	* NAMESPACE handler (RFC 2342)
	764	*
	765	* @return array Namespace data hash (personal, other, shared)
	766	*/
7fb0ae	767	public function getNamespace()
393ba7	768	{
fc7a41	769	if (array_key_exists('namespace', $this->prefs)) {
A	770	return $this->prefs['namespace'];
	771	}
a5e8e5	772
393ba7	773	if (!$this->getCapability('NAMESPACE')) {
c2c820	774	return self::ERROR_BAD;
A	775	}
393ba7	776
c2c820	777	list($code, $response) = $this->execute('NAMESPACE');
393ba7	778
c2c820	779	if ($code == self::ERROR_OK && preg_match('/^\* NAMESPACE /', $response)) {
93e640	780	$response = substr($response, 11);
AM	781	$data = $this->tokenizeResponse($response);
c2c820	782	}
393ba7	783
c2c820	784	if (!is_array($data)) {
A	785	return $code;
	786	}
393ba7	787
fc7a41	788	$this->prefs['namespace'] = array(
A	789	'personal' => $data[0],
	790	'other' => $data[1],
	791	'shared' => $data[2],
	792	);
	793
	794	return $this->prefs['namespace'];
59c216	795	}
A	796
e361bf	797	/**
A	798	* Connects to IMAP server and authenticates.
	799	*
86b241	800	* @param string $host Server hostname or IP
AM	801	* @param string $user User name
	802	* @param string $password Password
	803	* @param array $options Connection and class options
e361bf	804	*
A	805	* @return bool True on success, False on failure
	806	*/
7fb0ae	807	public function connect($host, $user, $password, $options = null)
59c216	808	{
05da15	809	// configure
AM	810	$this->set_prefs($options);
59c216	811
c2c820	812	$this->host = $host;
109bcc	813	$this->user = $user;
59c216	814	$this->logged = false;
109bcc	815	$this->selected = null;
59c216	816
c2c820	817	// check input
A	818	if (empty($host)) {
	819	$this->setError(self::ERROR_BAD, "Empty host");
	820	return false;
	821	}
109bcc	822
59c216	823	if (empty($user)) {
c2c820	824	$this->setError(self::ERROR_NO, "Empty user");
A	825	return false;
	826	}
109bcc	827
1b8ca0	828	if (empty($password) && empty($options['gssapi_cn'])) {
c2c820	829	$this->setError(self::ERROR_NO, "Empty password");
A	830	return false;
	831	}
59c216	832
f07d23	833	// Connect
109bcc	834	if (!$this->_connect($host)) {
c2c820	835	return false;
A	836	}
59c216	837
890eae	838	// Send ID info
A	839	if (!empty($this->prefs['ident']) && $this->getCapability('ID')) {
5eb9c7	840	$this->data['ID'] = $this->id($this->prefs['ident']);
890eae	841	}
A	842
109bcc	843	$auth_method = $this->prefs['auth_type'];
c2c820	844	$auth_methods = array();
7bf255	845	$result = null;
59c216	846
c2c820	847	// check for supported auth methods
A	848	if ($auth_method == 'CHECK') {
600bb1	849	if ($auth_caps = $this->getCapability('AUTH')) {
A	850	$auth_methods = $auth_caps;
c2c820	851	}
7bf255	852	// RFC 2595 (LOGINDISABLED) LOGIN disabled when connection is not secure
808d16	853	$login_disabled = $this->getCapability('LOGINDISABLED');
A	854	if (($key = array_search('LOGIN', $auth_methods)) !== false) {
	855	if ($login_disabled) {
	856	unset($auth_methods[$key]);
	857	}
	858	}
	859	else if (!$login_disabled) {
	860	$auth_methods[] = 'LOGIN';
c2c820	861	}
ab0b51	862
A	863	// Use best (for security) supported authentication method
1b8ca0	864	$all_methods = array('GSSAPI', 'DIGEST-MD5', 'CRAM-MD5', 'CRAM_MD5', 'PLAIN', 'LOGIN');
AM	865	foreach ($all_methods as $auth_method) {
ab0b51	866	if (in_array($auth_method, $auth_methods)) {
A	867	break;
	868	}
	869	}
c2c820	870	}
7bf255	871	else {
f0638b	872	// Prevent from sending credentials in plain text when connection is not secure
c2c820	873	if ($auth_method == 'LOGIN' && $this->getCapability('LOGINDISABLED')) {
A	874	$this->setError(self::ERROR_BAD, "Login disabled by IMAP server");
e232ac	875	$this->closeConnection();
c2c820	876	return false;
f0638b	877	}
4dd417	878	// replace AUTH with CRAM-MD5 for backward compat.
ab0b51	879	if ($auth_method == 'AUTH') {
A	880	$auth_method = 'CRAM-MD5';
	881	}
7bf255	882	}
A	883
475760	884	// pre-login capabilities can be not complete
A	885	$this->capability_readed = false;
	886
7bf255	887	// Authenticate
ab0b51	888	switch ($auth_method) {
600bb1	889	case 'CRAM_MD5':
ab0b51	890	$auth_method = 'CRAM-MD5';
4dd417	891	case 'CRAM-MD5':
600bb1	892	case 'DIGEST-MD5':
c2c820	893	case 'PLAIN':
1b8ca0	894	case 'GSSAPI':
ab0b51	895	$result = $this->authenticate($user, $password, $auth_method);
c2c820	896	break;
7bf255	897	case 'LOGIN':
c2c820	898	$result = $this->login($user, $password);
7bf255	899	break;
A	900	default:
ab0b51	901	$this->setError(self::ERROR_BAD, "Configuration error. Unknown auth method: $auth_method");
c2c820	902	}
59c216	903
7bf255	904	// Connected and authenticated
c2c820	905	if (is_resource($result)) {
59c216	906	if ($this->prefs['force_caps']) {
c2c820	907	$this->clearCapability();
59c216	908	}
A	909	$this->logged = true;
b93d00	910
c2c820	911	return true;
7bf255	912	}
A	913
e232ac	914	$this->closeConnection();
7bf255	915
f0638b	916	return false;
59c216	917	}
A	918
e361bf	919	/**
109bcc	920	* Connects to IMAP server.
AM	921	*
	922	* @param string $host Server hostname or IP
	923	*
	924	* @return bool True on success, False on failure
	925	*/
	926	protected function _connect($host)
	927	{
	928	// initialize connection
	929	$this->error = '';
	930	$this->errornum = self::ERROR_OK;
	931
	932	if (!$this->prefs['port']) {
	933	$this->prefs['port'] = 143;
	934	}
	935
	936	// check for SSL
	937	if ($this->prefs['ssl_mode'] && $this->prefs['ssl_mode'] != 'tls') {
	938	$host = $this->prefs['ssl_mode'] . '://' . $host;
	939	}
	940
	941	if ($this->prefs['timeout'] <= 0) {
	942	$this->prefs['timeout'] = max(0, intval(ini_get('default_socket_timeout')));
	943	}
	944
	945	if (!empty($this->prefs['socket_options'])) {
	946	$context = stream_context_create($this->prefs['socket_options']);
	947	$this->fp = stream_socket_client($host . ':' . $this->prefs['port'], $errno, $errstr,
	948	$this->prefs['timeout'], STREAM_CLIENT_CONNECT, $context);
	949	}
	950	else {
	951	$this->fp = @fsockopen($host, $this->prefs['port'], $errno, $errstr, $this->prefs['timeout']);
	952	}
	953
	954	if (!$this->fp) {
	955	$this->setError(self::ERROR_BAD, sprintf("Could not connect to %s:%d: %s",
	956	$host, $this->prefs['port'], $errstr ?: "Unknown reason"));
	957
	958	return false;
	959	}
	960
	961	if ($this->prefs['timeout'] > 0) {
	962	stream_set_timeout($this->fp, $this->prefs['timeout']);
	963	}
	964
	965	$line = trim(fgets($this->fp, 8192));
	966
86b241	967	if ($this->debug) {
109bcc	968	// set connection identifier for debug output
AM	969	preg_match('/#([0-9]+)/', (string) $this->fp, $m);
	970	$this->resourceid = strtoupper(substr(md5($m[1].$this->user.microtime()), 0, 4));
	971
	972	if ($line) {
	973	$this->debug('S: '. $line);
	974	}
	975	}
	976
	977	// Connected to wrong port or connection error?
	978	if (!preg_match('/^\* (OK\|PREAUTH)/i', $line)) {
	979	if ($line)
	980	$error = sprintf("Wrong startup greeting (%s:%d): %s", $host, $this->prefs['port'], $line);
	981	else
	982	$error = sprintf("Empty startup greeting (%s:%d)", $host, $this->prefs['port']);
	983
	984	$this->setError(self::ERROR_BAD, $error);
	985	$this->closeConnection();
	986	return false;
	987	}
5eb9c7	988
AM	989	$this->data['GREETING'] = trim(preg_replace('/\[[^\]]+\]\s*/', '', $line));
109bcc	990
AM	991	// RFC3501 [7.1] optional CAPABILITY response
	992	if (preg_match('/\[CAPABILITY ([^]]+)\]/i', $line, $matches)) {
	993	$this->parseCapability($matches[1], true);
	994	}
	995
	996	// TLS connection
	997	if ($this->prefs['ssl_mode'] == 'tls' && $this->getCapability('STARTTLS')) {
	998	$res = $this->execute('STARTTLS');
	999
	1000	if ($res[0] != self::ERROR_OK) {
	1001	$this->closeConnection();
	1002	return false;
	1003	}
	1004
8f71b1	1005	if (isset($this->prefs['socket_options']['ssl']['crypto_method'])) {
FR	1006	$crypto_method = $this->prefs['socket_options']['ssl']['crypto_method'];
	1007	}
	1008	else {
	1009	// There is no flag to enable all TLS methods. Net_SMTP
	1010	// handles enabling TLS similarly.
	1011	$crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT
	1012	\| @STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT
	1013	\| @STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT;
	1014	}
191a6a	1015
FR	1016	if (!stream_socket_enable_crypto($this->fp, true, $crypto_method)) {
109bcc	1017	$this->setError(self::ERROR_BAD, "Unable to negotiate TLS");
AM	1018	$this->closeConnection();
	1019	return false;
	1020	}
	1021
	1022	// Now we're secure, capabilities need to be reread
	1023	$this->clearCapability();
	1024	}
	1025
	1026	return true;
	1027	}
	1028
	1029	/**
05da15	1030	* Initializes environment
AM	1031	*/
	1032	protected function set_prefs($prefs)
	1033	{
	1034	// set preferences
	1035	if (is_array($prefs)) {
	1036	$this->prefs = $prefs;
	1037	}
	1038
	1039	// set auth method
	1040	if (!empty($this->prefs['auth_type'])) {
	1041	$this->prefs['auth_type'] = strtoupper($this->prefs['auth_type']);
	1042	}
	1043	else {
	1044	$this->prefs['auth_type'] = 'CHECK';
	1045	}
	1046
	1047	// disabled capabilities
	1048	if (!empty($this->prefs['disabled_caps'])) {
	1049	$this->prefs['disabled_caps'] = array_map('strtoupper', (array)$this->prefs['disabled_caps']);
	1050	}
	1051
	1052	// additional message flags
	1053	if (!empty($this->prefs['message_flags'])) {
	1054	$this->flags = array_merge($this->flags, $this->prefs['message_flags']);
	1055	unset($this->prefs['message_flags']);
	1056	}
	1057	}
	1058
	1059	/**
e361bf	1060	* Checks connection status
A	1061	*
	1062	* @return bool True if connection is active and user is logged in, False otherwise.
	1063	*/
7fb0ae	1064	public function connected()
59c216	1065	{
6f2c00	1066	return $this->fp && $this->logged;
59c216	1067	}
A	1068
e361bf	1069	/**
A	1070	* Closes connection with logout.
	1071	*/
7fb0ae	1072	public function closeConnection()
59c216	1073	{
18372a	1074	if ($this->logged && $this->putLine($this->nextTag() . ' LOGOUT')) {
c2c820	1075	$this->readReply();
f0638b	1076	}
A	1077
3e3981	1078	$this->closeSocket();
59c216	1079	}
A	1080
e232ac	1081	/**
A	1082	* Executes SELECT command (if mailbox is already not in selected state)
	1083	*
80152b	1084	* @param string $mailbox Mailbox name
A	1085	* @param array $qresync_data QRESYNC data (RFC5162)
e232ac	1086	*
A	1087	* @return boolean True on success, false on error
	1088	*/
7fb0ae	1089	public function select($mailbox, $qresync_data = null)
59c216	1090	{
c2c820	1091	if (!strlen($mailbox)) {
A	1092	return false;
	1093	}
a2e8cb	1094
609d39	1095	if ($this->selected === $mailbox) {
c2c820	1096	return true;
A	1097	}
576b33	1098	/*
A	1099	Temporary commented out because Courier returns \Noselect for INBOX
	1100	Requires more investigation
1d5165	1101
a5a4bf	1102	if (is_array($this->data['LIST']) && is_array($opts = $this->data['LIST'][$mailbox])) {
A	1103	if (in_array('\\Noselect', $opts)) {
	1104	return false;
	1105	}
	1106	}
576b33	1107	*/
80152b	1108	$params = array($this->escape($mailbox));
A	1109
	1110	// QRESYNC data items
	1111	// 0. the last known UIDVALIDITY,
	1112	// 1. the last known modification sequence,
	1113	// 2. the optional set of known UIDs, and
	1114	// 3. an optional parenthesized list of known sequence ranges and their
	1115	// corresponding UIDs.
	1116	if (!empty($qresync_data)) {
86b241	1117	if (!empty($qresync_data[2])) {
80152b	1118	$qresync_data[2] = self::compressMessageSet($qresync_data[2]);
86b241	1119	}
AM	1120
80152b	1121	$params[] = array('QRESYNC', $qresync_data);
A	1122	}
	1123
	1124	list($code, $response) = $this->execute('SELECT', $params);
03dbf3	1125
a2e8cb	1126	if ($code == self::ERROR_OK) {
85f420	1127	$this->clear_mailbox_cache();
AM	1128
a2e8cb	1129	$response = explode("\r\n", $response);
A	1130	foreach ($response as $line) {
4921c2	1131	if (preg_match('/^\* OK \[/i', $line)) {
AM	1132	$pos = strcspn($line, ' ]', 6);
	1133	$token = strtoupper(substr($line, 6, $pos));
	1134	$pos += 7;
	1135
	1136	switch ($token) {
	1137	case 'UIDNEXT':
	1138	case 'UIDVALIDITY':
	1139	case 'UNSEEN':
	1140	if ($len = strspn($line, '0123456789', $pos)) {
	1141	$this->data[$token] = (int) substr($line, $pos, $len);
	1142	}
	1143	break;
	1144
	1145	case 'HIGHESTMODSEQ':
	1146	if ($len = strspn($line, '0123456789', $pos)) {
	1147	$this->data[$token] = (string) substr($line, $pos, $len);
	1148	}
	1149	break;
	1150
	1151	case 'NOMODSEQ':
	1152	$this->data[$token] = true;
	1153	break;
	1154
	1155	case 'PERMANENTFLAGS':
	1156	$start = strpos($line, '(', $pos);
	1157	$end = strrpos($line, ')');
	1158	if ($start && $end) {
	1159	$flags = substr($line, $start + 1, $end - $start - 1);
	1160	$this->data[$token] = explode(' ', $flags);
	1161	}
	1162	break;
80152b	1163	}
c2c820	1164	}
4921c2	1165	else if (preg_match('/^\* ([0-9]+) (EXISTS\|RECENT\|FETCH)/i', $line, $match)) {
AM	1166	$token = strtoupper($match[2]);
	1167	switch ($token) {
	1168	case 'EXISTS':
	1169	case 'RECENT':
	1170	$this->data[$token] = (int) $match[1];
	1171	break;
80152b	1172
4921c2	1173	case 'FETCH':
AM	1174	// QRESYNC FETCH response (RFC5162)
	1175	$line = substr($line, strlen($match[0]));
	1176	$fetch_data = $this->tokenizeResponse($line, 1);
	1177	$data = array('id' => $match[1]);
	1178
	1179	for ($i=0, $size=count($fetch_data); $i<$size; $i+=2) {
	1180	$data[strtolower($fetch_data[$i])] = $fetch_data[$i+1];
	1181	}
	1182
	1183	$this->data['QRESYNC'][$data['uid']] = $data;
	1184	break;
80152b	1185	}
A	1186	}
	1187	// QRESYNC VANISHED response (RFC5162)
	1188	else if (preg_match('/^\* VANISHED [()EARLIER]*/i', $line, $match)) {
	1189	$line = substr($line, strlen($match[0]));
	1190	$v_data = $this->tokenizeResponse($line, 1);
	1191
	1192	$this->data['VANISHED'] = $v_data;
c2c820	1193	}
a2e8cb	1194	}
59c216	1195
90f81a	1196	$this->data['READ-WRITE'] = $this->resultcode != 'READ-ONLY';
c2c820	1197	$this->selected = $mailbox;
86b241	1198
c2c820	1199	return true;
A	1200	}
8fcc3e	1201
59c216	1202	return false;
A	1203	}
	1204
710e27	1205	/**
e232ac	1206	* Executes STATUS command
710e27	1207	*
A	1208	* @param string $mailbox Mailbox name
36911e	1209	* @param array $items Additional requested item names. By default
A	1210	* MESSAGES and UNSEEN are requested. Other defined
	1211	* in RFC3501: UIDNEXT, UIDVALIDITY, RECENT
710e27	1212	*
A	1213	* @return array Status item-value hash
	1214	* @since 0.5-beta
	1215	*/
7fb0ae	1216	public function status($mailbox, $items = array())
710e27	1217	{
c2c820	1218	if (!strlen($mailbox)) {
A	1219	return false;
	1220	}
36911e	1221
A	1222	if (!in_array('MESSAGES', $items)) {
	1223	$items[] = 'MESSAGES';
	1224	}
	1225	if (!in_array('UNSEEN', $items)) {
	1226	$items[] = 'UNSEEN';
	1227	}
710e27	1228
A	1229	list($code, $response) = $this->execute('STATUS', array($this->escape($mailbox),
	1230	'(' . implode(' ', (array) $items) . ')'));
	1231
eca19d	1232	if ($code == self::ERROR_OK && preg_match('/^\* STATUS /i', $response)) {
710e27	1233	$result = array();
A	1234	$response = substr($response, 9); // remove prefix "* STATUS "
	1235
	1236	list($mbox, $items) = $this->tokenizeResponse($response, 2);
	1237
0ea947	1238	// Fix for #1487859. Some buggy server returns not quoted
A	1239	// folder name with spaces. Let's try to handle this situation
	1240	if (!is_array($items) && ($pos = strpos($response, '(')) !== false) {
	1241	$response = substr($response, $pos);
9e4246	1242	$items = $this->tokenizeResponse($response, 1);
AM	1243
0ea947	1244	if (!is_array($items)) {
A	1245	return $result;
	1246	}
	1247	}
	1248
710e27	1249	for ($i=0, $len=count($items); $i<$len; $i += 2) {
80152b	1250	$result[$items[$i]] = $items[$i+1];
710e27	1251	}
36911e	1252
A	1253	$this->data['STATUS:'.$mailbox] = $result;
710e27	1254
c2c820	1255	return $result;
A	1256	}
710e27	1257
A	1258	return false;
	1259	}
	1260
e232ac	1261	/**
A	1262	* Executes EXPUNGE command
	1263	*
d9dc32	1264	* @param string $mailbox Mailbox name
AM	1265	* @param string\|array $messages Message UIDs to expunge
e232ac	1266	*
A	1267	* @return boolean True on success, False on error
	1268	*/
7fb0ae	1269	public function expunge($mailbox, $messages = null)
59c216	1270	{
c2c820	1271	if (!$this->select($mailbox)) {
90f81a	1272	return false;
A	1273	}
	1274
	1275	if (!$this->data['READ-WRITE']) {
c027ba	1276	$this->setError(self::ERROR_READONLY, "Mailbox is read-only");
e232ac	1277	return false;
A	1278	}
1d5165	1279
e232ac	1280	// Clear internal status cache
1422b0	1281	$this->clear_status_cache($mailbox);
448409	1282
d9dc32	1283	if (!empty($messages) && $messages != '*' && $this->hasCapability('UIDPLUS')) {
AM	1284	$messages = self::compressMessageSet($messages);
	1285	$result = $this->execute('UID EXPUNGE', array($messages), self::COMMAND_NORESPONSE);
	1286	}
	1287	else {
c2c820	1288	$result = $this->execute('EXPUNGE', null, self::COMMAND_NORESPONSE);
d9dc32	1289	}
e232ac	1290
c2c820	1291	if ($result == self::ERROR_OK) {
609d39	1292	$this->selected = null; // state has changed, need to reselect
c2c820	1293	return true;
A	1294	}
59c216	1295
c2c820	1296	return false;
59c216	1297	}
A	1298
e232ac	1299	/**
A	1300	* Executes CLOSE command
	1301	*
	1302	* @return boolean True on success, False on error
	1303	* @since 0.5
	1304	*/
7fb0ae	1305	public function close()
e232ac	1306	{
86b241	1307	$result = $this->execute('CLOSE', null, self::COMMAND_NORESPONSE);
e232ac	1308
A	1309	if ($result == self::ERROR_OK) {
609d39	1310	$this->selected = null;
e232ac	1311	return true;
A	1312	}
	1313
c2c820	1314	return false;
e232ac	1315	}
A	1316
	1317	/**
e361bf	1318	* Folder subscription (SUBSCRIBE)
e232ac	1319	*
A	1320	* @param string $mailbox Mailbox name
	1321	*
	1322	* @return boolean True on success, False on error
	1323	*/
7fb0ae	1324	public function subscribe($mailbox)
e232ac	1325	{
c2c820	1326	$result = $this->execute('SUBSCRIBE', array($this->escape($mailbox)),
A	1327	self::COMMAND_NORESPONSE);
e232ac	1328
7fb0ae	1329	return $result == self::ERROR_OK;
e232ac	1330	}
A	1331
	1332	/**
e361bf	1333	* Folder unsubscription (UNSUBSCRIBE)
e232ac	1334	*
A	1335	* @param string $mailbox Mailbox name
	1336	*
	1337	* @return boolean True on success, False on error
	1338	*/
7fb0ae	1339	public function unsubscribe($mailbox)
e232ac	1340	{
c2c820	1341	$result = $this->execute('UNSUBSCRIBE', array($this->escape($mailbox)),
e361bf	1342	self::COMMAND_NORESPONSE);
A	1343
7fb0ae	1344	return $result == self::ERROR_OK;
e361bf	1345	}
A	1346
	1347	/**
	1348	* Folder creation (CREATE)
	1349	*
	1350	* @param string $mailbox Mailbox name
7fb0ae	1351	* @param array $types Optional folder types (RFC 6154)
e361bf	1352	*
A	1353	* @return bool True on success, False on error
	1354	*/
7fb0ae	1355	public function createFolder($mailbox, $types = null)
e361bf	1356	{
dc0b50	1357	$args = array($this->escape($mailbox));
AM	1358
	1359	// RFC 6154: CREATE-SPECIAL-USE
	1360	if (!empty($types) && $this->getCapability('CREATE-SPECIAL-USE')) {
	1361	$args[] = '(USE (' . implode(' ', $types) . '))';
	1362	}
	1363
	1364	$result = $this->execute('CREATE', $args, self::COMMAND_NORESPONSE);
e361bf	1365
7fb0ae	1366	return $result == self::ERROR_OK;
e361bf	1367	}
A	1368
	1369	/**
	1370	* Folder renaming (RENAME)
	1371	*
	1372	* @param string $mailbox Mailbox name
	1373	*
	1374	* @return bool True on success, False on error
	1375	*/
7fb0ae	1376	public function renameFolder($from, $to)
e361bf	1377	{
A	1378	$result = $this->execute('RENAME', array($this->escape($from), $this->escape($to)),
c2c820	1379	self::COMMAND_NORESPONSE);
e232ac	1380
7fb0ae	1381	return $result == self::ERROR_OK;
e232ac	1382	}
A	1383
	1384	/**
	1385	* Executes DELETE command
	1386	*
	1387	* @param string $mailbox Mailbox name
	1388	*
	1389	* @return boolean True on success, False on error
	1390	*/
7fb0ae	1391	public function deleteFolder($mailbox)
e232ac	1392	{
A	1393	$result = $this->execute('DELETE', array($this->escape($mailbox)),
c2c820	1394	self::COMMAND_NORESPONSE);
e232ac	1395
7fb0ae	1396	return $result == self::ERROR_OK;
e232ac	1397	}
A	1398
	1399	/**
	1400	* Removes all messages in a folder
	1401	*
	1402	* @param string $mailbox Mailbox name
	1403	*
	1404	* @return boolean True on success, False on error
	1405	*/
7fb0ae	1406	public function clearFolder($mailbox)
e232ac	1407	{
7fb0ae	1408	if ($this->countMessages($mailbox) > 0) {
a9ed78	1409	$res = $this->flag($mailbox, '1:*', 'DELETED');
c2c820	1410	}
e232ac	1411
90f81a	1412	if ($res) {
7fb0ae	1413	if ($this->selected === $mailbox) {
90f81a	1414	$res = $this->close();
7fb0ae	1415	}
AM	1416	else {
c2c820	1417	$res = $this->expunge($mailbox);
7fb0ae	1418	}
90f81a	1419	}
e232ac	1420
c2c820	1421	return $res;
e361bf	1422	}
A	1423
	1424	/**
	1425	* Returns list of mailboxes
	1426	*
	1427	* @param string $ref Reference name
	1428	* @param string $mailbox Mailbox name
07893b	1429	* @param array $return_opts (see self::_listMailboxes)
e361bf	1430	* @param array $select_opts (see self::_listMailboxes)
A	1431	*
e0492d	1432	* @return array\|bool List of mailboxes or hash of options if STATUS/MYROGHTS response
AM	1433	* is requested, False on error.
e361bf	1434	*/
7fb0ae	1435	public function listMailboxes($ref, $mailbox, $return_opts = array(), $select_opts = array())
e361bf	1436	{
07893b	1437	return $this->_listMailboxes($ref, $mailbox, false, $return_opts, $select_opts);
e361bf	1438	}
A	1439
	1440	/**
	1441	* Returns list of subscribed mailboxes
	1442	*
	1443	* @param string $ref Reference name
	1444	* @param string $mailbox Mailbox name
07893b	1445	* @param array $return_opts (see self::_listMailboxes)
e361bf	1446	*
e0492d	1447	* @return array\|bool List of mailboxes or hash of options if STATUS/MYROGHTS response
AM	1448	* is requested, False on error.
e361bf	1449	*/
7fb0ae	1450	public function listSubscribed($ref, $mailbox, $return_opts = array())
e361bf	1451	{
86b241	1452	return $this->_listMailboxes($ref, $mailbox, true, $return_opts, null);
e361bf	1453	}
A	1454
	1455	/**
	1456	* IMAP LIST/LSUB command
	1457	*
	1458	* @param string $ref Reference name
	1459	* @param string $mailbox Mailbox name
	1460	* @param bool $subscribed Enables returning subscribed mailboxes only
07893b	1461	* @param array $return_opts List of RETURN options (RFC5819: LIST-STATUS, RFC5258: LIST-EXTENDED)
AM	1462	* Possible: MESSAGES, RECENT, UIDNEXT, UIDVALIDITY, UNSEEN,
	1463	* MYRIGHTS, SUBSCRIBED, CHILDREN
e361bf	1464	* @param array $select_opts List of selection options (RFC5258: LIST-EXTENDED)
dc0b50	1465	* Possible: SUBSCRIBED, RECURSIVEMATCH, REMOTE,
AM	1466	* SPECIAL-USE (RFC6154)
e361bf	1467	*
e0492d	1468	* @return array\|bool List of mailboxes or hash of options if STATUS/MYROGHTS response
AM	1469	* is requested, False on error.
e361bf	1470	*/
232bcd	1471	protected function _listMailboxes($ref, $mailbox, $subscribed=false,
07893b	1472	$return_opts=array(), $select_opts=array())
e361bf	1473	{
A	1474	if (!strlen($mailbox)) {
	1475	$mailbox = '*';
	1476	}
	1477
	1478	$args = array();
dc0b50	1479	$rets = array();
e361bf	1480
A	1481	if (!empty($select_opts) && $this->getCapability('LIST-EXTENDED')) {
	1482	$select_opts = (array) $select_opts;
	1483
	1484	$args[] = '(' . implode(' ', $select_opts) . ')';
	1485	}
	1486
	1487	$args[] = $this->escape($ref);
	1488	$args[] = $this->escape($mailbox);
	1489
07893b	1490	if (!empty($return_opts) && $this->getCapability('LIST-EXTENDED')) {
e0492d	1491	$ext_opts = array('SUBSCRIBED', 'CHILDREN');
AM	1492	$rets = array_intersect($return_opts, $ext_opts);
	1493	$return_opts = array_diff($return_opts, $rets);
dc0b50	1494	}
e361bf	1495
07893b	1496	if (!empty($return_opts) && $this->getCapability('LIST-STATUS')) {
AM	1497	$lstatus = true;
	1498	$status_opts = array('MESSAGES', 'RECENT', 'UIDNEXT', 'UIDVALIDITY', 'UNSEEN');
	1499	$opts = array_diff($return_opts, $status_opts);
	1500	$status_opts = array_diff($return_opts, $opts);
dc0b50	1501
AM	1502	if (!empty($status_opts)) {
	1503	$rets[] = 'STATUS (' . implode(' ', $status_opts) . ')';
07893b	1504	}
AM	1505
	1506	if (!empty($opts)) {
	1507	$rets = array_merge($rets, $opts);
dc0b50	1508	}
AM	1509	}
	1510
	1511	if (!empty($rets)) {
	1512	$args[] = 'RETURN (' . implode(' ', $rets) . ')';
e361bf	1513	}
A	1514
	1515	list($code, $response) = $this->execute($subscribed ? 'LSUB' : 'LIST', $args);
	1516
	1517	if ($code == self::ERROR_OK) {
	1518	$folders = array();
	1519	$last = 0;
	1520	$pos = 0;
	1521	$response .= "\r\n";
	1522
	1523	while ($pos = strpos($response, "\r\n", $pos+1)) {
	1524	// literal string, not real end-of-command-line
	1525	if ($response[$pos-1] == '}') {
	1526	continue;
	1527	}
	1528
	1529	$line = substr($response, $last, $pos - $last);
	1530	$last = $pos + 2;
	1531
07893b	1532	if (!preg_match('/^\* (LIST\|LSUB\|STATUS\|MYRIGHTS) /i', $line, $m)) {
e361bf	1533	continue;
A	1534	}
07893b	1535
e361bf	1536	$cmd = strtoupper($m[1]);
A	1537	$line = substr($line, strlen($m[0]));
	1538
	1539	// * LIST (<options>) <delimiter> <mailbox>
	1540	if ($cmd == 'LIST' \|\| $cmd == 'LSUB') {
	1541	list($opts, $delim, $mailbox) = $this->tokenizeResponse($line, 3);
	1542
2b80d5	1543	// Remove redundant separator at the end of folder name, UW-IMAP bug? (#1488879)
AM	1544	if ($delim) {
	1545	$mailbox = rtrim($mailbox, $delim);
	1546	}
	1547
e361bf	1548	// Add to result array
A	1549	if (!$lstatus) {
	1550	$folders[] = $mailbox;
	1551	}
	1552	else {
	1553	$folders[$mailbox] = array();
	1554	}
	1555
bd2846	1556	// store folder options
AM	1557	if ($cmd == 'LIST') {
c6a9cd	1558	// Add to options array
7fb0ae	1559	if (empty($this->data['LIST'][$mailbox])) {
c6a9cd	1560	$this->data['LIST'][$mailbox] = $opts;
7fb0ae	1561	}
AM	1562	else if (!empty($opts)) {
c6a9cd	1563	$this->data['LIST'][$mailbox] = array_unique(array_merge(
A	1564	$this->data['LIST'][$mailbox], $opts));
7fb0ae	1565	}
c6a9cd	1566	}
e361bf	1567	}
07893b	1568	else if ($lstatus) {
AM	1569	// * STATUS <mailbox> (<result>)
	1570	if ($cmd == 'STATUS') {
	1571	list($mailbox, $status) = $this->tokenizeResponse($line, 2);
e361bf	1572
07893b	1573	for ($i=0, $len=count($status); $i<$len; $i += 2) {
AM	1574	list($name, $value) = $this->tokenizeResponse($status, 2);
	1575	$folders[$mailbox][$name] = $value;
	1576	}
	1577	}
	1578	// * MYRIGHTS <mailbox> <acl>
	1579	else if ($cmd == 'MYRIGHTS') {
	1580	list($mailbox, $acl) = $this->tokenizeResponse($line, 2);
	1581	$folders[$mailbox]['MYRIGHTS'] = $acl;
e361bf	1582	}
A	1583	}
	1584	}
	1585
	1586	return $folders;
	1587	}
	1588
	1589	return false;
e232ac	1590	}
A	1591
	1592	/**
	1593	* Returns count of all messages in a folder
	1594	*
	1595	* @param string $mailbox Mailbox name
	1596	*
	1597	* @return int Number of messages, False on error
	1598	*/
7fb0ae	1599	public function countMessages($mailbox)
59c216	1600	{
1422b0	1601	if ($this->selected === $mailbox && isset($this->data['EXISTS'])) {
c2c820	1602	return $this->data['EXISTS'];
A	1603	}
710e27	1604
36911e	1605	// Check internal cache
A	1606	$cache = $this->data['STATUS:'.$mailbox];
	1607	if (!empty($cache) && isset($cache['MESSAGES'])) {
	1608	return (int) $cache['MESSAGES'];
	1609	}
	1610
	1611	// Try STATUS (should be faster than SELECT)
	1612	$counts = $this->status($mailbox);
36ed9d	1613	if (is_array($counts)) {
A	1614	return (int) $counts['MESSAGES'];
	1615	}
	1616
710e27	1617	return false;
e232ac	1618	}
A	1619
	1620	/**
	1621	* Returns count of messages with \Recent flag in a folder
	1622	*
	1623	* @param string $mailbox Mailbox name
	1624	*
	1625	* @return int Number of messages, False on error
	1626	*/
7fb0ae	1627	public function countRecent($mailbox)
e232ac	1628	{
1422b0	1629	if ($this->selected === $mailbox && isset($this->data['RECENT'])) {
AM	1630	return $this->data['RECENT'];
c2c820	1631	}
e232ac	1632
1422b0	1633	// Check internal cache
AM	1634	$cache = $this->data['STATUS:'.$mailbox];
	1635	if (!empty($cache) && isset($cache['RECENT'])) {
	1636	return (int) $cache['RECENT'];
	1637	}
e232ac	1638
1422b0	1639	// Try STATUS (should be faster than SELECT)
AM	1640	$counts = $this->status($mailbox, array('RECENT'));
	1641	if (is_array($counts)) {
	1642	return (int) $counts['RECENT'];
c2c820	1643	}
e232ac	1644
c2c820	1645	return false;
710e27	1646	}
A	1647
	1648	/**
	1649	* Returns count of messages without \Seen flag in a specified folder
	1650	*
	1651	* @param string $mailbox Mailbox name
	1652	*
	1653	* @return int Number of messages, False on error
	1654	*/
7fb0ae	1655	public function countUnseen($mailbox)
710e27	1656	{
36911e	1657	// Check internal cache
A	1658	$cache = $this->data['STATUS:'.$mailbox];
	1659	if (!empty($cache) && isset($cache['UNSEEN'])) {
	1660	return (int) $cache['UNSEEN'];
	1661	}
	1662
	1663	// Try STATUS (should be faster than SELECT+SEARCH)
	1664	$counts = $this->status($mailbox);
710e27	1665	if (is_array($counts)) {
A	1666	return (int) $counts['UNSEEN'];
	1667	}
	1668
	1669	// Invoke SEARCH as a fallback
659cf1	1670	$index = $this->search($mailbox, 'ALL UNSEEN', false, array('COUNT'));
1d7dcc	1671	if (!$index->is_error()) {
40c45e	1672	return $index->count();
710e27	1673	}
59c216	1674
A	1675	return false;
	1676	}
	1677
890eae	1678	/**
A	1679	* Executes ID command (RFC2971)
	1680	*
	1681	* @param array $items Client identification information key/value hash
	1682	*
	1683	* @return array Server identification information key/value hash
	1684	* @since 0.6
	1685	*/
7fb0ae	1686	public function id($items = array())
890eae	1687	{
A	1688	if (is_array($items) && !empty($items)) {
	1689	foreach ($items as $key => $value) {
5c2f06	1690	$args[] = $this->escape($key, true);
A	1691	$args[] = $this->escape($value, true);
890eae	1692	}
A	1693	}
	1694
	1695	list($code, $response) = $this->execute('ID', array(
	1696	!empty($args) ? '(' . implode(' ', (array) $args) . ')' : $this->escape(null)
	1697	));
	1698
eca19d	1699	if ($code == self::ERROR_OK && preg_match('/^\* ID /i', $response)) {
890eae	1700	$response = substr($response, 5); // remove prefix "* ID "
1463a5	1701	$items = $this->tokenizeResponse($response, 1);
890eae	1702	$result = null;
A	1703
	1704	for ($i=0, $len=count($items); $i<$len; $i += 2) {
	1705	$result[$items[$i]] = $items[$i+1];
	1706	}
80152b	1707
A	1708	return $result;
	1709	}
	1710
	1711	return false;
	1712	}
	1713
	1714	/**
	1715	* Executes ENABLE command (RFC5161)
	1716	*
	1717	* @param mixed $extension Extension name to enable (or array of names)
	1718	*
	1719	* @return array\|bool List of enabled extensions, False on error
	1720	* @since 0.6
	1721	*/
7fb0ae	1722	public function enable($extension)
80152b	1723	{
7ab9c1	1724	if (empty($extension)) {
80152b	1725	return false;
7ab9c1	1726	}
80152b	1727
7ab9c1	1728	if (!$this->hasCapability('ENABLE')) {
80152b	1729	return false;
7ab9c1	1730	}
80152b	1731
7ab9c1	1732	if (!is_array($extension)) {
80152b	1733	$extension = array($extension);
7ab9c1	1734	}
AM	1735
	1736	if (!empty($this->extensions_enabled)) {
	1737	// check if all extensions are already enabled
	1738	$diff = array_diff($extension, $this->extensions_enabled);
	1739
	1740	if (empty($diff)) {
	1741	return $extension;
	1742	}
	1743
	1744	// Make sure the mailbox isn't selected, before enabling extension(s)
	1745	if ($this->selected !== null) {
	1746	$this->close();
	1747	}
	1748	}
80152b	1749
A	1750	list($code, $response) = $this->execute('ENABLE', $extension);
	1751
eca19d	1752	if ($code == self::ERROR_OK && preg_match('/^\* ENABLED /i', $response)) {
80152b	1753	$response = substr($response, 10); // remove prefix "* ENABLED "
A	1754	$result = (array) $this->tokenizeResponse($response);
890eae	1755
7ab9c1	1756	$this->extensions_enabled = array_unique(array_merge((array)$this->extensions_enabled, $result));
AM	1757
	1758	return $this->extensions_enabled;
890eae	1759	}
A	1760
	1761	return false;
	1762	}
	1763
40c45e	1764	/**
A	1765	* Executes SORT command
	1766	*
	1767	* @param string $mailbox Mailbox name
	1768	* @param string $field Field to sort by (ARRIVAL, CC, DATE, FROM, SIZE, SUBJECT, TO)
bee1e1	1769	* @param string $criteria Searching criteria
40c45e	1770	* @param bool $return_uid Enables UID SORT usage
A	1771	* @param string $encoding Character set
	1772	*
	1773	* @return rcube_result_index Response data
	1774	*/
7fb0ae	1775	public function sort($mailbox, $field = 'ARRIVAL', $criteria = '', $return_uid = false, $encoding = 'US-ASCII')
59c216	1776	{
bee1e1	1777	$old_sel = $this->selected;
AM	1778	$supported = array('ARRIVAL', 'CC', 'DATE', 'FROM', 'SIZE', 'SUBJECT', 'TO');
	1779	$field = strtoupper($field);
	1780
c2c820	1781	if ($field == 'INTERNALDATE') {
A	1782	$field = 'ARRIVAL';
	1783	}
1d5165	1784
bee1e1	1785	if (!in_array($field, $supported)) {
40c45e	1786	return new rcube_result_index($mailbox);
c2c820	1787	}
59c216	1788
c2c820	1789	if (!$this->select($mailbox)) {
40c45e	1790	return new rcube_result_index($mailbox);
c2c820	1791	}
1d5165	1792
bee1e1	1793	// return empty result when folder is empty and we're just after SELECT
AM	1794	if ($old_sel != $mailbox && !$this->data['EXISTS']) {
	1795	return new rcube_result_index($mailbox, '* SORT');
	1796	}
	1797
3c71c6	1798	// RFC 5957: SORT=DISPLAY
A	1799	if (($field == 'FROM' \|\| $field == 'TO') && $this->getCapability('SORT=DISPLAY')) {
	1800	$field = 'DISPLAY' . $field;
	1801	}
	1802
bee1e1	1803	$encoding = $encoding ? trim($encoding) : 'US-ASCII';
AM	1804	$criteria = $criteria ? 'ALL ' . trim($criteria) : 'ALL';
59c216	1805
40c45e	1806	list($code, $response) = $this->execute($return_uid ? 'UID SORT' : 'SORT',
bee1e1	1807	array("($field)", $encoding, $criteria));
59c216	1808
40c45e	1809	if ($code != self::ERROR_OK) {
A	1810	$response = null;
c2c820	1811	}
1d5165	1812
40c45e	1813	return new rcube_result_index($mailbox, $response);
59c216	1814	}
A	1815
40c45e	1816	/**
e361bf	1817	* Executes THREAD command
A	1818	*
	1819	* @param string $mailbox Mailbox name
	1820	* @param string $algorithm Threading algorithm (ORDEREDSUBJECT, REFERENCES, REFS)
	1821	* @param string $criteria Searching criteria
	1822	* @param bool $return_uid Enables UIDs in result instead of sequence numbers
	1823	* @param string $encoding Character set
	1824	*
	1825	* @return rcube_result_thread Thread data
	1826	*/
7fb0ae	1827	public function thread($mailbox, $algorithm = 'REFERENCES', $criteria = '', $return_uid = false, $encoding = 'US-ASCII')
e361bf	1828	{
A	1829	$old_sel = $this->selected;
	1830
	1831	if (!$this->select($mailbox)) {
	1832	return new rcube_result_thread($mailbox);
	1833	}
	1834
	1835	// return empty result when folder is empty and we're just after SELECT
	1836	if ($old_sel != $mailbox && !$this->data['EXISTS']) {
bee1e1	1837	return new rcube_result_thread($mailbox, '* THREAD');
e361bf	1838	}
A	1839
	1840	$encoding = $encoding ? trim($encoding) : 'US-ASCII';
	1841	$algorithm = $algorithm ? trim($algorithm) : 'REFERENCES';
	1842	$criteria = $criteria ? 'ALL '.trim($criteria) : 'ALL';
	1843
	1844	list($code, $response) = $this->execute($return_uid ? 'UID THREAD' : 'THREAD',
	1845	array($algorithm, $encoding, $criteria));
	1846
	1847	if ($code != self::ERROR_OK) {
	1848	$response = null;
	1849	}
	1850
	1851	return new rcube_result_thread($mailbox, $response);
	1852	}
	1853
	1854	/**
	1855	* Executes SEARCH command
	1856	*
	1857	* @param string $mailbox Mailbox name
	1858	* @param string $criteria Searching criteria
	1859	* @param bool $return_uid Enable UID in result instead of sequence ID
	1860	* @param array $items Return items (MIN, MAX, COUNT, ALL)
	1861	*
	1862	* @return rcube_result_index Result data
	1863	*/
7fb0ae	1864	public function search($mailbox, $criteria, $return_uid = false, $items = array())
e361bf	1865	{
A	1866	$old_sel = $this->selected;
	1867
	1868	if (!$this->select($mailbox)) {
	1869	return new rcube_result_index($mailbox);
	1870	}
	1871
	1872	// return empty result when folder is empty and we're just after SELECT
	1873	if ($old_sel != $mailbox && !$this->data['EXISTS']) {
	1874	return new rcube_result_index($mailbox, '* SEARCH');
	1875	}
	1876
	1877	// If ESEARCH is supported always use ALL
	1878	// but not when items are specified or using simple id2uid search
91cb9d	1879	if (empty($items) && preg_match('/[^0-9]/', $criteria)) {
e361bf	1880	$items = array('ALL');
A	1881	}
	1882
	1883	$esearch = empty($items) ? false : $this->getCapability('ESEARCH');
	1884	$criteria = trim($criteria);
	1885	$params = '';
	1886
	1887	// RFC4731: ESEARCH
	1888	if (!empty($items) && $esearch) {
	1889	$params .= 'RETURN (' . implode(' ', $items) . ')';
	1890	}
	1891
	1892	if (!empty($criteria)) {
	1893	$params .= ($params ? ' ' : '') . $criteria;
	1894	}
	1895	else {
	1896	$params .= 'ALL';
	1897	}
	1898
	1899	list($code, $response) = $this->execute($return_uid ? 'UID SEARCH' : 'SEARCH',
	1900	array($params));
	1901
	1902	if ($code != self::ERROR_OK) {
	1903	$response = null;
	1904	}
	1905
	1906	return new rcube_result_index($mailbox, $response);
	1907	}
	1908
	1909	/**
40c45e	1910	* Simulates SORT command by using FETCH and sorting.
A	1911	*
	1912	* @param string $mailbox Mailbox name
	1913	* @param string\|array $message_set Searching criteria (list of messages to return)
	1914	* @param string $index_field Field to sort by (ARRIVAL, CC, DATE, FROM, SIZE, SUBJECT, TO)
	1915	* @param bool $skip_deleted Makes that DELETED messages will be skipped
	1916	* @param bool $uidfetch Enables UID FETCH usage
	1917	* @param bool $return_uid Enables returning UIDs instead of IDs
	1918	*
	1919	* @return rcube_result_index Response data
	1920	*/
7fb0ae	1921	public function index($mailbox, $message_set, $index_field='', $skip_deleted=true,
40c45e	1922	$uidfetch=false, $return_uid=false)
A	1923	{
	1924	$msg_index = $this->fetchHeaderIndex($mailbox, $message_set,
	1925	$index_field, $skip_deleted, $uidfetch, $return_uid);
	1926
	1927	if (!empty($msg_index)) {
	1928	asort($msg_index); // ASC
	1929	$msg_index = array_keys($msg_index);
	1930	$msg_index = '* SEARCH ' . implode(' ', $msg_index);
	1931	}
	1932	else {
	1933	$msg_index = is_array($msg_index) ? '* SEARCH' : null;
	1934	}
	1935
	1936	return new rcube_result_index($mailbox, $msg_index);
	1937	}
	1938
7fb0ae	1939	/**
AM	1940	* Fetches specified header/data value for a set of messages.
	1941	*
	1942	* @param string $mailbox Mailbox name
	1943	* @param string\|array $message_set Searching criteria (list of messages to return)
	1944	* @param string $index_field Field to sort by (ARRIVAL, CC, DATE, FROM, SIZE, SUBJECT, TO)
	1945	* @param bool $skip_deleted Makes that DELETED messages will be skipped
	1946	* @param bool $uidfetch Enables UID FETCH usage
	1947	* @param bool $return_uid Enables returning UIDs instead of IDs
	1948	*
	1949	* @return array\|bool List of header values or False on failure
	1950	*/
	1951	public function fetchHeaderIndex($mailbox, $message_set, $index_field = '', $skip_deleted = true,
	1952	$uidfetch = false, $return_uid = false)
59c216	1953	{
c2c820	1954	if (is_array($message_set)) {
7fb0ae	1955	if (!($message_set = $this->compressMessageSet($message_set))) {
c2c820	1956	return false;
7fb0ae	1957	}
AM	1958	}
	1959	else {
c2c820	1960	list($from_idx, $to_idx) = explode(':', $message_set);
A	1961	if (empty($message_set) \|\|
7fb0ae	1962	(isset($to_idx) && $to_idx != '*' && (int)$from_idx > (int)$to_idx)
AM	1963	) {
c2c820	1964	return false;
A	1965	}
59c216	1966	}
A	1967
c2c820	1968	$index_field = empty($index_field) ? 'DATE' : strtoupper($index_field);
59c216	1969
c2c820	1970	$fields_a['DATE'] = 1;
A	1971	$fields_a['INTERNALDATE'] = 4;
	1972	$fields_a['ARRIVAL'] = 4;
	1973	$fields_a['FROM'] = 1;
	1974	$fields_a['REPLY-TO'] = 1;
	1975	$fields_a['SENDER'] = 1;
	1976	$fields_a['TO'] = 1;
	1977	$fields_a['CC'] = 1;
	1978	$fields_a['SUBJECT'] = 1;
	1979	$fields_a['UID'] = 2;
	1980	$fields_a['SIZE'] = 2;
	1981	$fields_a['SEEN'] = 3;
	1982	$fields_a['RECENT'] = 3;
	1983	$fields_a['DELETED'] = 3;
59c216	1984
c2c820	1985	if (!($mode = $fields_a[$index_field])) {
A	1986	return false;
	1987	}
1d5165	1988
7fb0ae	1989	// Select the mailbox
c2c820	1990	if (!$this->select($mailbox)) {
A	1991	return false;
	1992	}
59c216	1993
c2c820	1994	// build FETCH command string
40c45e	1995	$key = $this->nextTag();
A	1996	$cmd = $uidfetch ? 'UID FETCH' : 'FETCH';
	1997	$fields = array();
59c216	1998
7fb0ae	1999	if ($return_uid) {
40c45e	2000	$fields[] = 'UID';
7fb0ae	2001	}
AM	2002	if ($skip_deleted) {
40c45e	2003	$fields[] = 'FLAGS';
7fb0ae	2004	}
40c45e	2005
A	2006	if ($mode == 1) {
7fb0ae	2007	if ($index_field == 'DATE') {
40c45e	2008	$fields[] = 'INTERNALDATE';
7fb0ae	2009	}
40c45e	2010	$fields[] = "BODY.PEEK[HEADER.FIELDS ($index_field)]";
A	2011	}
c2c820	2012	else if ($mode == 2) {
7fb0ae	2013	if ($index_field == 'SIZE') {
40c45e	2014	$fields[] = 'RFC822.SIZE';
7fb0ae	2015	}
AM	2016	else if (!$return_uid \|\| $index_field != 'UID') {
40c45e	2017	$fields[] = $index_field;
7fb0ae	2018	}
40c45e	2019	}
7fb0ae	2020	else if ($mode == 3 && !$skip_deleted) {
40c45e	2021	$fields[] = 'FLAGS';
7fb0ae	2022	}
AM	2023	else if ($mode == 4) {
40c45e	2024	$fields[] = 'INTERNALDATE';
7fb0ae	2025	}
c2c820	2026
40c45e	2027	$request = "$key $cmd $message_set (" . implode(' ', $fields) . ")";
c2c820	2028
A	2029	if (!$this->putLine($request)) {
	2030	$this->setError(self::ERROR_COMMAND, "Unable to send command: $request");
	2031	return false;
	2032	}
	2033
	2034	$result = array();
	2035
	2036	do {
	2037	$line = rtrim($this->readLine(200));
	2038	$line = $this->multLine($line);
	2039
	2040	if (preg_match('/^\* ([0-9]+) FETCH/', $line, $m)) {
	2041	$id = $m[1];
86b241	2042	$flags = null;
c2c820	2043
40c45e	2044	if ($return_uid) {
7fb0ae	2045	if (preg_match('/UID ([0-9]+)/', $line, $matches)) {
40c45e	2046	$id = (int) $matches[1];
7fb0ae	2047	}
AM	2048	else {
40c45e	2049	continue;
7fb0ae	2050	}
40c45e	2051	}
c2c820	2052	if ($skip_deleted && preg_match('/FLAGS $([^)]+)$/', $line, $matches)) {
A	2053	$flags = explode(' ', strtoupper($matches[1]));
	2054	if (in_array('\\DELETED', $flags)) {
	2055	continue;
	2056	}
	2057	}
	2058
	2059	if ($mode == 1 && $index_field == 'DATE') {
	2060	if (preg_match('/BODY\[HEADER\.FIELDS $"DATE"$\] (.*)/', $line, $matches)) {
	2061	$value = preg_replace(array('/^"*[a-z]+:/i'), '', $matches[1]);
	2062	$value = trim($value);
	2063	$result[$id] = $this->strToTime($value);
	2064	}
	2065	// non-existent/empty Date: header, use INTERNALDATE
	2066	if (empty($result[$id])) {
7fb0ae	2067	if (preg_match('/INTERNALDATE "([^"]+)"/', $line, $matches)) {
c2c820	2068	$result[$id] = $this->strToTime($matches[1]);
7fb0ae	2069	}
AM	2070	else {
c2c820	2071	$result[$id] = 0;
7fb0ae	2072	}
c2c820	2073	}
7fb0ae	2074	}
AM	2075	else if ($mode == 1) {
c2c820	2076	if (preg_match('/BODY\[HEADER\.FIELDS $"?(FROM\|REPLY-TO\|SENDER\|TO\|SUBJECT)"?$\] (.*)/', $line, $matches)) {
A	2077	$value = preg_replace(array('/^"*[a-z]+:/i', '/\s+$/sm'), array('', ''), $matches[2]);
	2078	$result[$id] = trim($value);
7fb0ae	2079	}
AM	2080	else {
c2c820	2081	$result[$id] = '';
A	2082	}
7fb0ae	2083	}
AM	2084	else if ($mode == 2) {
4922e5	2085	if (preg_match('/' . $index_field . ' ([0-9]+)/', $line, $matches)) {
AM	2086	$result[$id] = trim($matches[1]);
7fb0ae	2087	}
AM	2088	else {
c2c820	2089	$result[$id] = 0;
A	2090	}
7fb0ae	2091	}
AM	2092	else if ($mode == 3) {
c2c820	2093	if (!$flags && preg_match('/FLAGS $([^)]+)$/', $line, $matches)) {
A	2094	$flags = explode(' ', $matches[1]);
	2095	}
7fb0ae	2096	$result[$id] = in_array("\\".$index_field, (array) $flags) ? 1 : 0;
AM	2097	}
	2098	else if ($mode == 4) {
c2c820	2099	if (preg_match('/INTERNALDATE "([^"]+)"/', $line, $matches)) {
A	2100	$result[$id] = $this->strToTime($matches[1]);
7fb0ae	2101	}
AM	2102	else {
c2c820	2103	$result[$id] = 0;
A	2104	}
	2105	}
	2106	}
7fb0ae	2107	}
AM	2108	while (!$this->startsWith($line, $key, true, true));
c2c820	2109
A	2110	return $result;
59c216	2111	}
A	2112
93272e	2113	/**
A	2114	* Returns message sequence identifier
	2115	*
	2116	* @param string $mailbox Mailbox name
	2117	* @param int $uid Message unique identifier (UID)
	2118	*
	2119	* @return int Message sequence identifier
	2120	*/
7fb0ae	2121	public function UID2ID($mailbox, $uid)
59c216	2122	{
c2c820	2123	if ($uid > 0) {
40c45e	2124	$index = $this->search($mailbox, "UID $uid");
A	2125
	2126	if ($index->count() == 1) {
	2127	$arr = $index->get();
	2128	return (int) $arr[0];
c2c820	2129	}
A	2130	}
59c216	2131	}
A	2132
93272e	2133	/**
A	2134	* Returns message unique identifier (UID)
	2135	*
	2136	* @param string $mailbox Mailbox name
	2137	* @param int $uid Message sequence identifier
	2138	*
	2139	* @return int Message unique identifier
	2140	*/
7fb0ae	2141	public function ID2UID($mailbox, $id)
59c216	2142	{
c2c820	2143	if (empty($id) \|\| $id < 0) {
80152b	2144	return null;
c2c820	2145	}
59c216	2146
c2c820	2147	if (!$this->select($mailbox)) {
93272e	2148	return null;
59c216	2149	}
A	2150
85f420	2151	if ($uid = $this->data['UID-MAP'][$id]) {
AM	2152	return $uid;
	2153	}
	2154
	2155	if (isset($this->data['EXISTS']) && $id > $this->data['EXISTS']) {
	2156	return null;
	2157	}
	2158
40c45e	2159	$index = $this->search($mailbox, $id, true);
8fcc3e	2160
40c45e	2161	if ($index->count() == 1) {
A	2162	$arr = $index->get();
85f420	2163	return $this->data['UID-MAP'][$id] = (int) $arr[0];
8fcc3e	2164	}
e361bf	2165	}
A	2166
	2167	/**
	2168	* Sets flag of the message(s)
	2169	*
7fb0ae	2170	* @param string $mailbox Mailbox name
AM	2171	* @param string\|array $messages Message UID(s)
	2172	* @param string $flag Flag name
e361bf	2173	*
A	2174	* @return bool True on success, False on failure
	2175	*/
7fb0ae	2176	public function flag($mailbox, $messages, $flag)
AM	2177	{
e361bf	2178	return $this->modFlag($mailbox, $messages, $flag, '+');
A	2179	}
	2180
	2181	/**
	2182	* Unsets flag of the message(s)
	2183	*
7fb0ae	2184	* @param string $mailbox Mailbox name
AM	2185	* @param string\|array $messages Message UID(s)
	2186	* @param string $flag Flag name
e361bf	2187	*
A	2188	* @return bool True on success, False on failure
	2189	*/
7fb0ae	2190	public function unflag($mailbox, $messages, $flag)
AM	2191	{
e361bf	2192	return $this->modFlag($mailbox, $messages, $flag, '-');
A	2193	}
	2194
	2195	/**
	2196	* Changes flag of the message(s)
	2197	*
7fb0ae	2198	* @param string $mailbox Mailbox name
AM	2199	* @param string\|array $messages Message UID(s)
	2200	* @param string $flag Flag name
	2201	* @param string $mod Modifier [+\|-]. Default: "+".
e361bf	2202	*
A	2203	* @return bool True on success, False on failure
	2204	*/
232bcd	2205	protected function modFlag($mailbox, $messages, $flag, $mod = '+')
e361bf	2206	{
7fb0ae	2207	if (!$flag) {
AM	2208	return false;
	2209	}
	2210
e361bf	2211	if (!$this->select($mailbox)) {
A	2212	return false;
	2213	}
	2214
	2215	if (!$this->data['READ-WRITE']) {
c027ba	2216	$this->setError(self::ERROR_READONLY, "Mailbox is read-only");
e361bf	2217	return false;
A	2218	}
	2219
e15674	2220	if ($this->flags[strtoupper($flag)]) {
AM	2221	$flag = $this->flags[strtoupper($flag)];
07fa81	2222	}
AM	2223
	2224	// if PERMANENTFLAGS is not specified all flags are allowed
	2225	if (!empty($this->data['PERMANENTFLAGS'])
	2226	&& !in_array($flag, (array) $this->data['PERMANENTFLAGS'])
	2227	&& !in_array('\\*', (array) $this->data['PERMANENTFLAGS'])
e15674	2228	) {
AM	2229	return false;
	2230	}
	2231
e361bf	2232	// Clear internal status cache
A	2233	if ($flag == 'SEEN') {
	2234	unset($this->data['STATUS:'.$mailbox]['UNSEEN']);
	2235	}
	2236
e15674	2237	if ($mod != '+' && $mod != '-') {
AM	2238	$mod = '+';
	2239	}
	2240
e361bf	2241	$result = $this->execute('UID STORE', array(
A	2242	$this->compressMessageSet($messages), $mod . 'FLAGS.SILENT', "($flag)"),
	2243	self::COMMAND_NORESPONSE);
	2244
7fb0ae	2245	return $result == self::ERROR_OK;
e361bf	2246	}
A	2247
	2248	/**
	2249	* Copies message(s) from one folder to another
	2250	*
7fb0ae	2251	* @param string\|array $messages Message UID(s)
AM	2252	* @param string $from Mailbox name
	2253	* @param string $to Destination mailbox name
e361bf	2254	*
A	2255	* @return bool True on success, False on failure
	2256	*/
7fb0ae	2257	public function copy($messages, $from, $to)
e361bf	2258	{
397976	2259	// Clear last COPYUID data
AM	2260	unset($this->data['COPYUID']);
	2261
e361bf	2262	if (!$this->select($from)) {
A	2263	return false;
	2264	}
	2265
	2266	// Clear internal status cache
	2267	unset($this->data['STATUS:'.$to]);
	2268
	2269	$result = $this->execute('UID COPY', array(
	2270	$this->compressMessageSet($messages), $this->escape($to)),
	2271	self::COMMAND_NORESPONSE);
	2272
7fb0ae	2273	return $result == self::ERROR_OK;
e361bf	2274	}
A	2275
	2276	/**
	2277	* Moves message(s) from one folder to another.
	2278	*
7fb0ae	2279	* @param string\|array $messages Message UID(s)
AM	2280	* @param string $from Mailbox name
	2281	* @param string $to Destination mailbox name
e361bf	2282	*
A	2283	* @return bool True on success, False on failure
	2284	*/
7fb0ae	2285	public function move($messages, $from, $to)
e361bf	2286	{
A	2287	if (!$this->select($from)) {
	2288	return false;
	2289	}
	2290
	2291	if (!$this->data['READ-WRITE']) {
c027ba	2292	$this->setError(self::ERROR_READONLY, "Mailbox is read-only");
e361bf	2293	return false;
A	2294	}
	2295
d9dc32	2296	// use MOVE command (RFC 6851)
AM	2297	if ($this->hasCapability('MOVE')) {
	2298	// Clear last COPYUID data
	2299	unset($this->data['COPYUID']);
e361bf	2300
A	2301	// Clear internal status cache
d9dc32	2302	unset($this->data['STATUS:'.$to]);
1422b0	2303	$this->clear_status_cache($from);
e361bf	2304
ea98ec	2305	$result = $this->execute('UID MOVE', array(
d9dc32	2306	$this->compressMessageSet($messages), $this->escape($to)),
AM	2307	self::COMMAND_NORESPONSE);
ea98ec	2308
7fb0ae	2309	return $result == self::ERROR_OK;
e361bf	2310	}
ea98ec	2311
d9dc32	2312	// use COPY + STORE +FLAGS.SILENT \Deleted + EXPUNGE
ea98ec	2313	$result = $this->copy($messages, $from, $to);
d9dc32	2314
ea98ec	2315	if ($result) {
AM	2316	// Clear internal status cache
	2317	unset($this->data['STATUS:'.$from]);
d9dc32	2318
ea98ec	2319	$result = $this->flag($from, $messages, 'DELETED');
d9dc32	2320
ea98ec	2321	if ($messages == '*') {
AM	2322	// CLOSE+SELECT should be faster than EXPUNGE
	2323	$this->close();
	2324	}
	2325	else {
	2326	$this->expunge($from, $messages);
d9dc32	2327	}
AM	2328	}
	2329
ea98ec	2330	return $result;
59c216	2331	}
A	2332
80152b	2333	/**
A	2334	* FETCH command (RFC3501)
	2335	*
	2336	* @param string $mailbox Mailbox name
	2337	* @param mixed $message_set Message(s) sequence identifier(s) or UID(s)
	2338	* @param bool $is_uid True if $message_set contains UIDs
	2339	* @param array $query_items FETCH command data items
	2340	* @param string $mod_seq Modification sequence for CHANGEDSINCE (RFC4551) query
	2341	* @param bool $vanished Enables VANISHED parameter (RFC5162) for CHANGEDSINCE query
	2342	*
0c2596	2343	* @return array List of rcube_message_header elements, False on error
80152b	2344	* @since 0.6
A	2345	*/
7fb0ae	2346	public function fetch($mailbox, $message_set, $is_uid = false, $query_items = array(),
80152b	2347	$mod_seq = null, $vanished = false)
59c216	2348	{
c2c820	2349	if (!$this->select($mailbox)) {
A	2350	return false;
	2351	}
59c216	2352
c2c820	2353	$message_set = $this->compressMessageSet($message_set);
80152b	2354	$result = array();
59c216	2355
c2c820	2356	$key = $this->nextTag();
80152b	2357	$request = $key . ($is_uid ? ' UID' : '') . " FETCH $message_set ";
A	2358	$request .= "(" . implode(' ', $query_items) . ")";
	2359
	2360	if ($mod_seq !== null && $this->hasCapability('CONDSTORE')) {
	2361	$request .= " (CHANGEDSINCE $mod_seq" . ($vanished ? " VANISHED" : '') .")";
	2362	}
59c216	2363
c2c820	2364	if (!$this->putLine($request)) {
c0ed78	2365	$this->setError(self::ERROR_COMMAND, "Unable to send command: $request");
c2c820	2366	return false;
A	2367	}
80152b	2368
c2c820	2369	do {
A	2370	$line = $this->readLine(4096);
1d5165	2371
7fb0ae	2372	if (!$line) {
59c216	2373	break;
7fb0ae	2374	}
80152b	2375
A	2376	// Sample reply line:
	2377	// * 321 FETCH (UID 2417 RFC822.SIZE 2730 FLAGS (\Seen)
	2378	// INTERNALDATE "16-Nov-2008 21:08:46 +0100" BODYSTRUCTURE (...)
	2379	// BODY[HEADER.FIELDS ...
1d5165	2380
c2c820	2381	if (preg_match('/^\* ([0-9]+) FETCH/', $line, $m)) {
A	2382	$id = intval($m[1]);
1d5165	2383
0c2596	2384	$result[$id] = new rcube_message_header;
c2c820	2385	$result[$id]->id = $id;
A	2386	$result[$id]->subject = '';
	2387	$result[$id]->messageID = 'mid:' . $id;
59c216	2388
de4de8	2389	$headers = null;
A	2390	$lines = array();
	2391	$line = substr($line, strlen($m[0]) + 2);
	2392	$ln = 0;
59c216	2393
80152b	2394	// get complete entry
A	2395	while (preg_match('/\{([0-9]+)\}\r\n$/', $line, $m)) {
	2396	$bytes = $m[1];
	2397	$out = '';
59c216	2398
80152b	2399	while (strlen($out) < $bytes) {
A	2400	$out = $this->readBytes($bytes);
7fb0ae	2401	if ($out === null) {
80152b	2402	break;
7fb0ae	2403	}
80152b	2404	$line .= $out;
c2c820	2405	}
59c216	2406
80152b	2407	$str = $this->readLine(4096);
7fb0ae	2408	if ($str === false) {
80152b	2409	break;
7fb0ae	2410	}
59c216	2411
80152b	2412	$line .= $str;
A	2413	}
	2414
	2415	// Tokenize response and assign to object properties
	2416	while (list($name, $value) = $this->tokenizeResponse($line, 2)) {
	2417	if ($name == 'UID') {
	2418	$result[$id]->uid = intval($value);
	2419	}
	2420	else if ($name == 'RFC822.SIZE') {
	2421	$result[$id]->size = intval($value);
	2422	}
	2423	else if ($name == 'RFC822.TEXT') {
	2424	$result[$id]->body = $value;
	2425	}
	2426	else if ($name == 'INTERNALDATE') {
	2427	$result[$id]->internaldate = $value;
	2428	$result[$id]->date = $value;
	2429	$result[$id]->timestamp = $this->StrToTime($value);
	2430	}
	2431	else if ($name == 'FLAGS') {
	2432	if (!empty($value)) {
	2433	foreach ((array)$value as $flag) {
7fb0ae	2434	$flag = str_replace(array('$', "\\"), '', $flag);
609d39	2435	$flag = strtoupper($flag);
80152b	2436
609d39	2437	$result[$id]->flags[$flag] = true;
c2c820	2438	}
A	2439	}
	2440	}
80152b	2441	else if ($name == 'MODSEQ') {
A	2442	$result[$id]->modseq = $value[0];
	2443	}
	2444	else if ($name == 'ENVELOPE') {
	2445	$result[$id]->envelope = $value;
	2446	}
	2447	else if ($name == 'BODYSTRUCTURE' \|\| ($name == 'BODY' && count($value) > 2)) {
	2448	if (!is_array($value[0]) && (strtolower($value[0]) == 'message' && strtolower($value[1]) == 'rfc822')) {
	2449	$value = array($value);
	2450	}
	2451	$result[$id]->bodystructure = $value;
	2452	}
	2453	else if ($name == 'RFC822') {
	2454	$result[$id]->body = $value;
	2455	}
6e57fb	2456	else if (stripos($name, 'BODY[') === 0) {
AM	2457	$name = str_replace(']', '', substr($name, 5));
	2458
	2459	if ($name == 'HEADER.FIELDS') {
	2460	// skip ']' after headers list
	2461	$this->tokenizeResponse($line, 1);
	2462	$headers = $this->tokenizeResponse($line, 1);
	2463	}
7fb0ae	2464	else if (strlen($name)) {
6e57fb	2465	$result[$id]->bodypart[$name] = $value;
7fb0ae	2466	}
AM	2467	else {
6e57fb	2468	$result[$id]->body = $value;
7fb0ae	2469	}
80152b	2470	}
c2c820	2471	}
59c216	2472
80152b	2473	// create array with header field:data
A	2474	if (!empty($headers)) {
	2475	$headers = explode("\n", trim($headers));
3725cf	2476	foreach ($headers as $resln) {
80152b	2477	if (ord($resln[0]) <= 32) {
A	2478	$lines[$ln] .= (empty($lines[$ln]) ? '' : "\n") . trim($resln);
7fb0ae	2479	}
AM	2480	else {
80152b	2481	$lines[++$ln] = trim($resln);
c2c820	2482	}
A	2483	}
59c216	2484
3725cf	2485	foreach ($lines as $str) {
f66f5f	2486	list($field, $string) = explode(':', $str, 2);
1d5165	2487
c2c820	2488	$field = strtolower($field);
f66f5f	2489	$string = preg_replace('/\n[\t\s]*/', ' ', trim($string));
1d5165	2490
c2c820	2491	switch ($field) {
A	2492	case 'date';
	2493	$result[$id]->date = $string;
	2494	$result[$id]->timestamp = $this->strToTime($string);
	2495	break;
	2496	case 'to':
	2497	$result[$id]->to = preg_replace('/undisclosed-recipients:[;,]*/', '', $string);
	2498	break;
7fb0ae	2499	case 'from':
c2c820	2500	case 'subject':
7fb0ae	2501	case 'cc':
AM	2502	case 'bcc':
	2503	case 'references':
	2504	$result[$id]->{$field} = $string;
c2c820	2505	break;
A	2506	case 'reply-to':
	2507	$result[$id]->replyto = $string;
	2508	break;
	2509	case 'content-transfer-encoding':
	2510	$result[$id]->encoding = $string;
	2511	break;
	2512	case 'content-type':
974f9d	2513	$ctype_parts = preg_split('/[; ]+/', $string);
62481f	2514	$result[$id]->ctype = strtolower(array_shift($ctype_parts));
c2c820	2515	if (preg_match('/charset\s=\s"?([a-z0-9\-\.\_]+)"?/i', $string, $regs)) {
A	2516	$result[$id]->charset = $regs[1];
	2517	}
	2518	break;
	2519	case 'in-reply-to':
	2520	$result[$id]->in_reply_to = str_replace(array("\n", '<', '>'), '', $string);
	2521	break;
	2522	case 'return-receipt-to':
	2523	case 'disposition-notification-to':
	2524	case 'x-confirm-reading-to':
	2525	$result[$id]->mdn_to = $string;
	2526	break;
	2527	case 'message-id':
	2528	$result[$id]->messageID = $string;
	2529	break;
	2530	case 'x-priority':
	2531	if (preg_match('/^(\d+)/', $string, $matches)) {
	2532	$result[$id]->priority = intval($matches[1]);
	2533	}
	2534	break;
	2535	default:
30cc01	2536	if (strlen($field) < 3) {
AM	2537	break;
c2c820	2538	}
30cc01	2539	if ($result[$id]->others[$field]) {
AM	2540	$string = array_merge((array)$result[$id]->others[$field], (array)$string);
	2541	}
	2542	$result[$id]->others[$field] = $string;
c2c820	2543	}
A	2544	}
	2545	}
	2546	}
80152b	2547	// VANISHED response (QRESYNC RFC5162)
A	2548	// Sample: * VANISHED (EARLIER) 300:310,405,411
609d39	2549	else if (preg_match('/^\* VANISHED [()EARLIER]*/i', $line, $match)) {
80152b	2550	$line = substr($line, strlen($match[0]));
A	2551	$v_data = $this->tokenizeResponse($line, 1);
	2552
	2553	$this->data['VANISHED'] = $v_data;
	2554	}
7fb0ae	2555	}
AM	2556	while (!$this->startsWith($line, $key, true));
80152b	2557
A	2558	return $result;
	2559	}
	2560
99edf8	2561	/**
AM	2562	* Returns message(s) data (flags, headers, etc.)
	2563	*
	2564	* @param string $mailbox Mailbox name
	2565	* @param mixed $message_set Message(s) sequence identifier(s) or UID(s)
	2566	* @param bool $is_uid True if $message_set contains UIDs
	2567	* @param bool $bodystr Enable to add BODYSTRUCTURE data to the result
	2568	* @param array $add_headers List of additional headers
	2569	*
	2570	* @return bool\|array List of rcube_message_header elements, False on error
	2571	*/
7fb0ae	2572	public function fetchHeaders($mailbox, $message_set, $is_uid = false, $bodystr = false, $add_headers = array())
80152b	2573	{
A	2574	$query_items = array('UID', 'RFC822.SIZE', 'FLAGS', 'INTERNALDATE');
99edf8	2575	$headers = array('DATE', 'FROM', 'TO', 'SUBJECT', 'CONTENT-TYPE', 'CC', 'REPLY-TO',
AM	2576	'LIST-POST', 'DISPOSITION-NOTIFICATION-TO', 'X-PRIORITY');
	2577
	2578	if (!empty($add_headers)) {
	2579	$add_headers = array_map('strtoupper', $add_headers);
	2580	$headers = array_unique(array_merge($headers, $add_headers));
	2581	}
	2582
	2583	if ($bodystr) {
80152b	2584	$query_items[] = 'BODYSTRUCTURE';
99edf8	2585	}
AM	2586
	2587	$query_items[] = 'BODY.PEEK[HEADER.FIELDS (' . implode(' ', $headers) . ')]';
80152b	2588
7fb0ae	2589	return $this->fetch($mailbox, $message_set, $is_uid, $query_items);
59c216	2590	}
A	2591
99edf8	2592	/**
AM	2593	* Returns message data (flags, headers, etc.)
	2594	*
	2595	* @param string $mailbox Mailbox name
	2596	* @param int $id Message sequence identifier or UID
	2597	* @param bool $is_uid True if $id is an UID
	2598	* @param bool $bodystr Enable to add BODYSTRUCTURE data to the result
	2599	* @param array $add_headers List of additional headers
	2600	*
	2601	* @return bool\|rcube_message_header Message data, False on error
	2602	*/
7fb0ae	2603	public function fetchHeader($mailbox, $id, $is_uid = false, $bodystr = false, $add_headers = array())
59c216	2604	{
99edf8	2605	$a = $this->fetchHeaders($mailbox, $id, $is_uid, $bodystr, $add_headers);
c2c820	2606	if (is_array($a)) {
A	2607	return array_shift($a);
	2608	}
7fb0ae	2609
c2c820	2610	return false;
59c216	2611	}
A	2612
843643	2613	/**
AM	2614	* Sort messages by specified header field
	2615	*
	2616	* @param array $messages Array of rcube_message_header objects
	2617	* @param string $field Name of the property to sort by
	2618	* @param string $flag Sorting order (ASC\|DESC)
	2619	*
	2620	* @return array Sorted input array
	2621	*/
	2622	public static function sortHeaders($messages, $field, $flag)
59c216	2623	{
843643	2624	// Strategy: First, we'll create an "index" array.
AM	2625	// Then, we'll use sort() on that array, and use that to sort the main array.
c2c820	2626
7fb0ae	2627	$field = empty($field) ? 'uid' : strtolower($field);
AM	2628	$flag = empty($flag) ? 'ASC' : strtoupper($flag);
843643	2629	$index = array();
AM	2630	$result = array();
	2631
	2632	reset($messages);
	2633
	2634	while (list($key, $headers) = each($messages)) {
	2635	$value = null;
	2636
	2637	switch ($field) {
	2638	case 'arrival':
	2639	$field = 'internaldate';
	2640	case 'date':
	2641	case 'internaldate':
	2642	case 'timestamp':
	2643	$value = self::strToTime($headers->$field);
	2644	if (!$value && $field != 'timestamp') {
	2645	$value = $headers->timestamp;
c2c820	2646	}
843643	2647
AM	2648	break;
	2649
	2650	default:
	2651	// @TODO: decode header value, convert to UTF-8
	2652	$value = $headers->$field;
	2653	if (is_string($value)) {
	2654	$value = str_replace('"', '', $value);
	2655	if ($field == 'subject') {
	2656	$value = preg_replace('/^(Re:\s\|Fwd:\s\|Fw:\s*)+/i', '', $value);
	2657	}
	2658
	2659	$data = strtoupper($value);
	2660	}
c2c820	2661	}
1d5165	2662
843643	2663	$index[$key] = $value;
AM	2664	}
	2665
	2666	if (!empty($index)) {
c2c820	2667	// sort index
A	2668	if ($flag == 'ASC') {
	2669	asort($index);
843643	2670	}
AM	2671	else {
c2c820	2672	arsort($index);
A	2673	}
59c216	2674
c2c820	2675	// form new array based on index
A	2676	while (list($key, $val) = each($index)) {
843643	2677	$result[$key] = $messages[$key];
c2c820	2678	}
A	2679	}
1d5165	2680
c2c820	2681	return $result;
59c216	2682	}
A	2683
7fb0ae	2684	/**
AM	2685	* Fetch MIME headers of specified message parts
	2686	*
	2687	* @param string $mailbox Mailbox name
	2688	* @param int $uid Message UID
	2689	* @param array $parts Message part identifiers
	2690	* @param bool $mime Use MIME instad of HEADER
	2691	*
	2692	* @return array\|bool Array containing headers string for each specified body
	2693	* False on failure.
	2694	*/
	2695	public function fetchMIMEHeaders($mailbox, $uid, $parts, $mime = true)
59c216	2696	{
c2c820	2697	if (!$this->select($mailbox)) {
A	2698	return false;
	2699	}
1d5165	2700
c2c820	2701	$result = false;
A	2702	$parts = (array) $parts;
	2703	$key = $this->nextTag();
52c2aa	2704	$peeks = array();
59c216	2705	$type = $mime ? 'MIME' : 'HEADER';
A	2706
c2c820	2707	// format request
52c2aa	2708	foreach ($parts as $part) {
c2c820	2709	$peeks[] = "BODY.PEEK[$part.$type]";
A	2710	}
1d5165	2711
80152b	2712	$request = "$key UID FETCH $uid (" . implode(' ', $peeks) . ')';
59c216	2713
c2c820	2714	// send request
A	2715	if (!$this->putLine($request)) {
c0ed78	2716	$this->setError(self::ERROR_COMMAND, "Unable to send command: $request");
c2c820	2717	return false;
A	2718	}
1d5165	2719
c2c820	2720	do {
A	2721	$line = $this->readLine(1024);
59c216	2722
7fb0ae	2723	if (preg_match('/^\* [0-9]+ FETCH [0-9UID( ]+/', $line, $m)) {
AM	2724	$line = ltrim(substr($line, strlen($m[0])));
	2725	while (preg_match('/^BODY\[([0-9\.]+)\.'.$type.'\]/', $line, $matches)) {
	2726	$line = substr($line, strlen($matches[0]));
	2727	$result[$matches[1]] = trim($this->multLine($line));
354cff	2728	$line = $this->readLine(1024);
52c2aa	2729	}
c2c820	2730	}
7fb0ae	2731	}
AM	2732	while (!$this->startsWith($line, $key, true));
59c216	2733
c2c820	2734	return $result;
59c216	2735	}
A	2736
7fb0ae	2737	/**
AM	2738	* Fetches message part header
	2739	*/
	2740	public function fetchPartHeader($mailbox, $id, $is_uid = false, $part = null)
59c216	2741	{
c2c820	2742	$part = empty($part) ? 'HEADER' : $part.'.MIME';
59c216	2743
A	2744	return $this->handlePartBody($mailbox, $id, $is_uid, $part);
	2745	}
	2746
7fb0ae	2747	/**
AM	2748	* Fetches body of the specified message part
	2749	*/
	2750	public function handlePartBody($mailbox, $id, $is_uid=false, $part='', $encoding=null, $print=null, $file=null, $formatted=false, $max_bytes=0)
59c216	2751	{
c2c820	2752	if (!$this->select($mailbox)) {
59c216	2753	return false;
A	2754	}
	2755
7fb0ae	2756	$binary = true;
59c216	2757
c2c820	2758	do {
81dab3	2759	if (!$initiated) {
AM	2760	switch ($encoding) {
	2761	case 'base64':
	2762	$mode = 1;
	2763	break;
	2764	case 'quoted-printable':
	2765	$mode = 2;
	2766	break;
	2767	case 'x-uuencode':
	2768	case 'x-uue':
	2769	case 'uue':
	2770	case 'uuencode':
	2771	$mode = 3;
	2772	break;
	2773	default:
	2774	$mode = 0;
	2775	}
	2776
	2777	// Use BINARY extension when possible (and safe)
bf9c9b	2778	$binary = $binary && $mode && preg_match('/^[0-9.]+$/', $part) && $this->hasCapability('BINARY');
81dab3	2779	$fetch_mode = $binary ? 'BINARY' : 'BODY';
AM	2780	$partial = $max_bytes ? sprintf('<0.%d>', $max_bytes) : '';
	2781
	2782	// format request
bf9c9b	2783	$key = $this->nextTag();
AM	2784	$request = $key . ($is_uid ? ' UID' : '') . " FETCH $id ($fetch_mode.PEEK[$part]$partial)";
	2785	$result = false;
	2786	$found = false;
	2787	$initiated = true;
81dab3	2788
AM	2789	// send request
	2790	if (!$this->putLine($request)) {
	2791	$this->setError(self::ERROR_COMMAND, "Unable to send command: $request");
	2792	return false;
	2793	}
	2794
	2795	if ($binary) {
	2796	// WARNING: Use $formatted argument with care, this may break binary data stream
	2797	$mode = -1;
	2798	}
	2799	}
	2800
7eb780	2801	$line = trim($this->readLine(1024));
59c216	2802
7eb780	2803	if (!$line) {
AM	2804	break;
c2c820	2805	}
59c216	2806
bf9c9b	2807	// handle UNKNOWN-CTE response - RFC 3516, try again with standard BODY request
AM	2808	if ($binary && !$found && preg_match('/^' . $key . ' NO \[UNKNOWN-CTE\]/i', $line)) {
	2809	$binary = $initiated = false;
	2810	continue;
	2811	}
	2812
c6f5ad	2813	// skip irrelevant untagged responses (we have a result already)
AM	2814	if ($found \|\| !preg_match('/^\* ([0-9]+) FETCH (.*)$/', $line, $m)) {
7eb780	2815	continue;
c2c820	2816	}
59c216	2817
7eb780	2818	$line = $m[2];
1d5165	2819
7eb780	2820	// handle one line response
c6f5ad	2821	if ($line[0] == '(' && substr($line, -1) == ')') {
7eb780	2822	// tokenize content inside brackets
7045bb	2823	// the content can be e.g.: (UID 9844 BODY[2.4] NIL)
c6f5ad	2824	$tokens = $this->tokenizeResponse(preg_replace('/(^$\|$$)/', '', $line));
AM	2825
	2826	for ($i=0; $i<count($tokens); $i+=2) {
c027ba	2827	if (preg_match('/^(BODY\|BINARY)/i', $tokens[$i])) {
6e57fb	2828	$result = $tokens[$i+1];
c6f5ad	2829	$found = true;
AM	2830	break;
	2831	}
	2832	}
ed302b	2833
7eb780	2834	if ($result !== false) {
AM	2835	if ($mode == 1) {
	2836	$result = base64_decode($result);
c2c820	2837	}
7eb780	2838	else if ($mode == 2) {
AM	2839	$result = quoted_printable_decode($result);
	2840	}
	2841	else if ($mode == 3) {
	2842	$result = convert_uudecode($result);
	2843	}
c2c820	2844	}
A	2845	}
7eb780	2846	// response with string literal
AM	2847	else if (preg_match('/\{([0-9]+)\}$/', $line, $m)) {
	2848	$bytes = (int) $m[1];
	2849	$prev = '';
c6f5ad	2850	$found = true;
1d5165	2851
8acf62	2852	// empty body
AM	2853	if (!$bytes) {
	2854	$result = '';
	2855	}
	2856	else while ($bytes > 0) {
7eb780	2857	$line = $this->readLine(8192);
AM	2858
86b241	2859	if ($line === null) {
7eb780	2860	break;
AM	2861	}
	2862
	2863	$len = strlen($line);
	2864
	2865	if ($len > $bytes) {
	2866	$line = substr($line, 0, $bytes);
	2867	$len = strlen($line);
	2868	}
	2869	$bytes -= $len;
	2870
	2871	// BASE64
	2872	if ($mode == 1) {
9d9623	2873	$line = preg_replace('\|[^a-zA-Z0-9+=/]\|', '', $line);
7eb780	2874	// create chunks with proper length for base64 decoding
AM	2875	$line = $prev.$line;
	2876	$length = strlen($line);
	2877	if ($length % 4) {
	2878	$length = floor($length / 4) * 4;
	2879	$prev = substr($line, $length);
	2880	$line = substr($line, 0, $length);
	2881	}
	2882	else {
	2883	$prev = '';
	2884	}
	2885	$line = base64_decode($line);
	2886	}
	2887	// QUOTED-PRINTABLE
	2888	else if ($mode == 2) {
	2889	$line = rtrim($line, "\t\r\0\x0B");
	2890	$line = quoted_printable_decode($line);
	2891	}
	2892	// UUENCODE
	2893	else if ($mode == 3) {
	2894	$line = rtrim($line, "\t\r\n\0\x0B");
	2895	if ($line == 'end' \|\| preg_match('/^begin\s+[0-7]+\s+.+$/', $line)) {
	2896	continue;
	2897	}
	2898	$line = convert_uudecode($line);
	2899	}
	2900	// default
	2901	else if ($formatted) {
	2902	$line = rtrim($line, "\t\r\n\0\x0B") . "\n";
	2903	}
	2904
	2905	if ($file) {
	2906	if (fwrite($file, $line) === false) {
	2907	break;
	2908	}
	2909	}
	2910	else if ($print) {
	2911	echo $line;
	2912	}
	2913	else {
	2914	$result .= $line;
	2915	}
	2916	}
	2917	}
7fb0ae	2918	}
AM	2919	while (!$this->startsWith($line, $key, true) \|\| !$initiated);
59c216	2920
c2c820	2921	if ($result !== false) {
A	2922	if ($file) {
dff2c7	2923	return fwrite($file, $result);
7eb780	2924	}
AM	2925	else if ($print) {
c2c820	2926	echo $result;
7eb780	2927	return true;
AM	2928	}
	2929
	2930	return $result;
c2c820	2931	}
59c216	2932
c2c820	2933	return false;
59c216	2934	}
A	2935
765fde	2936	/**
A	2937	* Handler for IMAP APPEND command
	2938	*
d76472	2939	* @param string $mailbox Mailbox name
AM	2940	* @param string\|array $message The message source string or array (of strings and file pointers)
	2941	* @param array $flags Message flags
	2942	* @param string $date Message internal date
	2943	* @param bool $binary Enable BINARY append (RFC3516)
765fde	2944	*
A	2945	* @return string\|bool On success APPENDUID response (if available) or True, False on failure
	2946	*/
7fb0ae	2947	public function append($mailbox, &$message, $flags = array(), $date = null, $binary = false)
59c216	2948	{
765fde	2949	unset($this->data['APPENDUID']);
A	2950
b56526	2951	if ($mailbox === null \|\| $mailbox === '') {
c2c820	2952	return false;
A	2953	}
59c216	2954
4f1c88	2955	$binary = $binary && $this->getCapability('BINARY');
AM	2956	$literal_plus = !$binary && $this->prefs['literal+'];
d76472	2957	$len = 0;
AM	2958	$msg = is_array($message) ? $message : array(&$message);
	2959	$chunk_size = 512000;
4f1c88	2960
d76472	2961	for ($i=0, $cnt=count($msg); $i<$cnt; $i++) {
AM	2962	if (is_resource($msg[$i])) {
	2963	$stat = fstat($msg[$i]);
	2964	if ($stat === false) {
	2965	return false;
	2966	}
	2967	$len += $stat['size'];
	2968	}
	2969	else {
	2970	if (!$binary) {
	2971	$msg[$i] = str_replace("\r", '', $msg[$i]);
	2972	$msg[$i] = str_replace("\n", "\r\n", $msg[$i]);
	2973	}
	2974
	2975	$len += strlen($msg[$i]);
	2976	}
4f1c88	2977	}
59c216	2978
c2c820	2979	if (!$len) {
A	2980	return false;
	2981	}
59c216	2982
00891e	2983	// build APPEND command
c0ed78	2984	$key = $this->nextTag();
00891e	2985	$request = "$key APPEND " . $this->escape($mailbox) . ' (' . $this->flagsToStr($flags) . ')';
AM	2986	if (!empty($date)) {
	2987	$request .= ' ' . $this->escape($date);
	2988	}
4f1c88	2989	$request .= ' ' . ($binary ? '~' : '') . '{' . $len . ($literal_plus ? '+' : '') . '}';
59c216	2990
00891e	2991	// send APPEND command
c2c820	2992	if ($this->putLine($request)) {
00891e	2993	// Do not wait when LITERAL+ is supported
4f1c88	2994	if (!$literal_plus) {
c2c820	2995	$line = $this->readReply();
59c216	2996
c2c820	2997	if ($line[0] != '+') {
A	2998	$this->parseResult($line, 'APPEND: ');
	2999	return false;
	3000	}
d83351	3001	}
59c216	3002
d76472	3003	foreach ($msg as $msg_part) {
AM	3004	// file pointer
	3005	if (is_resource($msg_part)) {
	3006	rewind($msg_part);
	3007	while (!feof($msg_part) && $this->fp) {
	3008	$buffer = fread($msg_part, $chunk_size);
	3009	$this->putLine($buffer, false);
	3010	}
	3011	fclose($msg_part);
	3012	}
	3013	// string
	3014	else {
	3015	$size = strlen($msg_part);
	3016
	3017	// Break up the data by sending one chunk (up to 512k) at a time.
	3018	// This approach reduces our peak memory usage
	3019	for ($offset = 0; $offset < $size; $offset += $chunk_size) {
	3020	$chunk = substr($msg_part, $offset, $chunk_size);
	3021	if (!$this->putLine($chunk, false)) {
	3022	return false;
	3023	}
	3024	}
	3025	}
	3026	}
	3027
	3028	if (!$this->putLine('')) { // \r\n
59c216	3029	return false;
A	3030	}
	3031
c2c820	3032	do {
A	3033	$line = $this->readLine();
	3034	} while (!$this->startsWith($line, $key, true, true));
1d5165	3035
36911e	3036	// Clear internal status cache
8738e9	3037	unset($this->data['STATUS:'.$mailbox]);
36911e	3038
765fde	3039	if ($this->parseResult($line, 'APPEND: ') != self::ERROR_OK)
A	3040	return false;
	3041	else if (!empty($this->data['APPENDUID']))
	3042	return $this->data['APPENDUID'];
	3043	else
	3044	return true;
c2c820	3045	}
8fcc3e	3046	else {
c0ed78	3047	$this->setError(self::ERROR_COMMAND, "Unable to send command: $request");
8fcc3e	3048	}
59c216	3049
c2c820	3050	return false;
59c216	3051	}
A	3052
765fde	3053	/**
A	3054	* Handler for IMAP APPEND command.
	3055	*
	3056	* @param string $mailbox Mailbox name
	3057	* @param string $path Path to the file with message body
	3058	* @param string $headers Message headers
00891e	3059	* @param array $flags Message flags
AM	3060	* @param string $date Message internal date
4f1c88	3061	* @param bool $binary Enable BINARY append (RFC3516)
765fde	3062	*
A	3063	* @return string\|bool On success APPENDUID response (if available) or True, False on failure
	3064	*/
7fb0ae	3065	public function appendFromFile($mailbox, $path, $headers=null, $flags = array(), $date = null, $binary = false)
59c216	3066	{
c2c820	3067	// open message file
A	3068	if (file_exists(realpath($path))) {
d76472	3069	$fp = fopen($path, 'r');
c2c820	3070	}
b56526	3071
d76472	3072	if (!$fp) {
c2c820	3073	$this->setError(self::ERROR_UNKNOWN, "Couldn't open $path for reading");
A	3074	return false;
	3075	}
1d5165	3076
d76472	3077	$message = array();
59c216	3078	if ($headers) {
d76472	3079	$message[] = trim($headers, "\r\n") . "\r\n\r\n";
59c216	3080	}
d76472	3081	$message[] = $fp;
59c216	3082
d76472	3083	return $this->append($mailbox, $message, $flags, $date, $binary);
59c216	3084	}
A	3085
e361bf	3086	/**
A	3087	* Returns QUOTA information
	3088	*
6fa1a0	3089	* @param string $mailbox Mailbox name
AM	3090	*
e361bf	3091	* @return array Quota information
A	3092	*/
7fb0ae	3093	public function getQuota($mailbox = null)
59c216	3094	{
6fa1a0	3095	if ($mailbox === null \|\| $mailbox === '') {
AM	3096	$mailbox = 'INBOX';
8fcc3e	3097	}
1d5165	3098
6fa1a0	3099	// a0001 GETQUOTAROOT INBOX
AM	3100	// * QUOTAROOT INBOX user/sample
	3101	// * QUOTA user/sample (STORAGE 654 9765)
	3102	// a0001 OK Completed
	3103
	3104	list($code, $response) = $this->execute('GETQUOTAROOT', array($this->escape($mailbox)));
	3105
	3106	$result = false;
c2c820	3107	$min_free = PHP_INT_MAX;
6fa1a0	3108	$all = array();
1d5165	3109
6fa1a0	3110	if ($code == self::ERROR_OK) {
AM	3111	foreach (explode("\n", $response) as $line) {
	3112	if (preg_match('/^\* QUOTA /', $line)) {
	3113	list(, , $quota_root) = $this->tokenizeResponse($line, 3);
	3114
	3115	while ($line) {
	3116	list($type, $used, $total) = $this->tokenizeResponse($line, 1);
	3117	$type = strtolower($type);
	3118
	3119	if ($type && $total) {
	3120	$all[$quota_root][$type]['used'] = intval($used);
	3121	$all[$quota_root][$type]['total'] = intval($total);
	3122	}
	3123	}
	3124
	3125	if (empty($all[$quota_root]['storage'])) {
	3126	continue;
	3127	}
	3128
	3129	$used = $all[$quota_root]['storage']['used'];
	3130	$total = $all[$quota_root]['storage']['total'];
	3131	$free = $total - $used;
	3132
	3133	// calculate lowest available space from all storage quotas
	3134	if ($free < $min_free) {
	3135	$min_free = $free;
	3136	$result['used'] = $used;
	3137	$result['total'] = $total;
	3138	$result['percent'] = min(100, round(($used/max(1,$total))*100));
	3139	$result['free'] = 100 - $result['percent'];
	3140	}
	3141	}
c2c820	3142	}
6fa1a0	3143	}
1d5165	3144
6fa1a0	3145	if (!empty($result)) {
AM	3146	$result['all'] = $all;
c2c820	3147	}
59c216	3148
c2c820	3149	return $result;
59c216	3150	}
A	3151
8b6eff	3152	/**
A	3153	* Send the SETACL command (RFC4314)
	3154	*
	3155	* @param string $mailbox Mailbox name
	3156	* @param string $user User name
	3157	* @param mixed $acl ACL string or array
	3158	*
	3159	* @return boolean True on success, False on failure
	3160	*
	3161	* @since 0.5-beta
	3162	*/
7fb0ae	3163	public function setACL($mailbox, $user, $acl)
8b6eff	3164	{
A	3165	if (is_array($acl)) {
	3166	$acl = implode('', $acl);
	3167	}
	3168
854cf2	3169	$result = $this->execute('SETACL', array(
A	3170	$this->escape($mailbox), $this->escape($user), strtolower($acl)),
	3171	self::COMMAND_NORESPONSE);
8b6eff	3172
c2c820	3173	return ($result == self::ERROR_OK);
8b6eff	3174	}
A	3175
	3176	/**
	3177	* Send the DELETEACL command (RFC4314)
	3178	*
	3179	* @param string $mailbox Mailbox name
	3180	* @param string $user User name
	3181	*
	3182	* @return boolean True on success, False on failure
	3183	*
	3184	* @since 0.5-beta
	3185	*/
7fb0ae	3186	public function deleteACL($mailbox, $user)
8b6eff	3187	{
854cf2	3188	$result = $this->execute('DELETEACL', array(
A	3189	$this->escape($mailbox), $this->escape($user)),
	3190	self::COMMAND_NORESPONSE);
8b6eff	3191
c2c820	3192	return ($result == self::ERROR_OK);
8b6eff	3193	}
A	3194
	3195	/**
	3196	* Send the GETACL command (RFC4314)
	3197	*
	3198	* @param string $mailbox Mailbox name
	3199	*
	3200	* @return array User-rights array on success, NULL on error
	3201	* @since 0.5-beta
	3202	*/
7fb0ae	3203	public function getACL($mailbox)
8b6eff	3204	{
aff04d	3205	list($code, $response) = $this->execute('GETACL', array($this->escape($mailbox)));
8b6eff	3206
854cf2	3207	if ($code == self::ERROR_OK && preg_match('/^\* ACL /i', $response)) {
A	3208	// Parse server response (remove "* ACL ")
	3209	$response = substr($response, 6);
8b6eff	3210	$ret = $this->tokenizeResponse($response);
aff04d	3211	$mbox = array_shift($ret);
8b6eff	3212	$size = count($ret);
A	3213
	3214	// Create user-rights hash array
	3215	// @TODO: consider implementing fixACL() method according to RFC4314.2.1.1
	3216	// so we could return only standard rights defined in RFC4314,
	3217	// excluding 'c' and 'd' defined in RFC2086.
	3218	if ($size % 2 == 0) {
	3219	for ($i=0; $i<$size; $i++) {
	3220	$ret[$ret[$i]] = str_split($ret[++$i]);
	3221	unset($ret[$i-1]);
	3222	unset($ret[$i]);
	3223	}
	3224	return $ret;
	3225	}
	3226
c0ed78	3227	$this->setError(self::ERROR_COMMAND, "Incomplete ACL response");
8b6eff	3228	}
A	3229	}
	3230
	3231	/**
	3232	* Send the LISTRIGHTS command (RFC4314)
	3233	*
	3234	* @param string $mailbox Mailbox name
	3235	* @param string $user User name
	3236	*
	3237	* @return array List of user rights
	3238	* @since 0.5-beta
	3239	*/
7fb0ae	3240	public function listRights($mailbox, $user)
8b6eff	3241	{
854cf2	3242	list($code, $response) = $this->execute('LISTRIGHTS', array(
A	3243	$this->escape($mailbox), $this->escape($user)));
8b6eff	3244
854cf2	3245	if ($code == self::ERROR_OK && preg_match('/^\* LISTRIGHTS /i', $response)) {
A	3246	// Parse server response (remove "* LISTRIGHTS ")
	3247	$response = substr($response, 13);
8b6eff	3248
A	3249	$ret_mbox = $this->tokenizeResponse($response, 1);
	3250	$ret_user = $this->tokenizeResponse($response, 1);
	3251	$granted = $this->tokenizeResponse($response, 1);
	3252	$optional = trim($response);
	3253
	3254	return array(
	3255	'granted' => str_split($granted),
	3256	'optional' => explode(' ', $optional),
	3257	);
	3258	}
	3259	}
	3260
	3261	/**
	3262	* Send the MYRIGHTS command (RFC4314)
	3263	*
	3264	* @param string $mailbox Mailbox name
	3265	*
	3266	* @return array MYRIGHTS response on success, NULL on error
	3267	* @since 0.5-beta
	3268	*/
7fb0ae	3269	public function myRights($mailbox)
8b6eff	3270	{
aff04d	3271	list($code, $response) = $this->execute('MYRIGHTS', array($this->escape($mailbox)));
8b6eff	3272
854cf2	3273	if ($code == self::ERROR_OK && preg_match('/^\* MYRIGHTS /i', $response)) {
A	3274	// Parse server response (remove "* MYRIGHTS ")
	3275	$response = substr($response, 11);
8b6eff	3276
A	3277	$ret_mbox = $this->tokenizeResponse($response, 1);
	3278	$rights = $this->tokenizeResponse($response, 1);
	3279
	3280	return str_split($rights);
	3281	}
	3282	}
	3283
	3284	/**
	3285	* Send the SETMETADATA command (RFC5464)
	3286	*
	3287	* @param string $mailbox Mailbox name
	3288	* @param array $entries Entry-value array (use NULL value as NIL)
	3289	*
	3290	* @return boolean True on success, False on failure
	3291	* @since 0.5-beta
	3292	*/
7fb0ae	3293	public function setMetadata($mailbox, $entries)
8b6eff	3294	{
A	3295	if (!is_array($entries) \|\| empty($entries)) {
c0ed78	3296	$this->setError(self::ERROR_COMMAND, "Wrong argument for SETMETADATA command");
8b6eff	3297	return false;
A	3298	}
	3299
	3300	foreach ($entries as $name => $value) {
cc02a9	3301	$entries[$name] = $this->escape($name) . ' ' . $this->escape($value, true);
8b6eff	3302	}
A	3303
	3304	$entries = implode(' ', $entries);
854cf2	3305	$result = $this->execute('SETMETADATA', array(
A	3306	$this->escape($mailbox), '(' . $entries . ')'),
	3307	self::COMMAND_NORESPONSE);
8b6eff	3308
854cf2	3309	return ($result == self::ERROR_OK);
8b6eff	3310	}
A	3311
	3312	/**
	3313	* Send the SETMETADATA command with NIL values (RFC5464)
	3314	*
	3315	* @param string $mailbox Mailbox name
	3316	* @param array $entries Entry names array
	3317	*
	3318	* @return boolean True on success, False on failure
	3319	*
	3320	* @since 0.5-beta
	3321	*/
7fb0ae	3322	public function deleteMetadata($mailbox, $entries)
8b6eff	3323	{
c2c820	3324	if (!is_array($entries) && !empty($entries)) {
8b6eff	3325	$entries = explode(' ', $entries);
c2c820	3326	}
8b6eff	3327
A	3328	if (empty($entries)) {
c0ed78	3329	$this->setError(self::ERROR_COMMAND, "Wrong argument for SETMETADATA command");
8b6eff	3330	return false;
A	3331	}
	3332
c2c820	3333	foreach ($entries as $entry) {
86b241	3334	$data[$entry] = null;
c2c820	3335	}
a85f88	3336
8b6eff	3337	return $this->setMetadata($mailbox, $data);
A	3338	}
	3339
	3340	/**
	3341	* Send the GETMETADATA command (RFC5464)
	3342	*
	3343	* @param string $mailbox Mailbox name
	3344	* @param array $entries Entries
	3345	* @param array $options Command options (with MAXSIZE and DEPTH keys)
	3346	*
	3347	* @return array GETMETADATA result on success, NULL on error
	3348	*
	3349	* @since 0.5-beta
	3350	*/
7fb0ae	3351	public function getMetadata($mailbox, $entries, $options=array())
8b6eff	3352	{
A	3353	if (!is_array($entries)) {
	3354	$entries = array($entries);
	3355	}
	3356
	3357	// create entries string
	3358	foreach ($entries as $idx => $name) {
a85f88	3359	$entries[$idx] = $this->escape($name);
8b6eff	3360	}
A	3361
	3362	$optlist = '';
	3363	$entlist = '(' . implode(' ', $entries) . ')';
	3364
	3365	// create options string
	3366	if (is_array($options)) {
	3367	$options = array_change_key_case($options, CASE_UPPER);
	3368	$opts = array();
	3369
c2c820	3370	if (!empty($options['MAXSIZE'])) {
8b6eff	3371	$opts[] = 'MAXSIZE '.intval($options['MAXSIZE']);
c2c820	3372	}
A	3373	if (!empty($options['DEPTH'])) {
8b6eff	3374	$opts[] = 'DEPTH '.intval($options['DEPTH']);
c2c820	3375	}
8b6eff	3376
c2c820	3377	if ($opts) {
8b6eff	3378	$optlist = '(' . implode(' ', $opts) . ')';
c2c820	3379	}
8b6eff	3380	}
A	3381
	3382	$optlist .= ($optlist ? ' ' : '') . $entlist;
	3383
854cf2	3384	list($code, $response) = $this->execute('GETMETADATA', array(
A	3385	$this->escape($mailbox), $optlist));
8b6eff	3386
814baf	3387	if ($code == self::ERROR_OK) {
A	3388	$result = array();
	3389	$data = $this->tokenizeResponse($response);
8b6eff	3390
A	3391	// The METADATA response can contain multiple entries in a single
	3392	// response or multiple responses for each entry or group of entries
	3393	if (!empty($data) && ($size = count($data))) {
	3394	for ($i=0; $i<$size; $i++) {
814baf	3395	if (isset($mbox) && is_array($data[$i])) {
8b6eff	3396	$size_sub = count($data[$i]);
0d273c	3397	for ($x=0; $x<$size_sub; $x+=2) {
939380	3398	if ($data[$i][$x+1] !== null)
0d273c	3399	$result[$mbox][$data[$i][$x]] = $data[$i][$x+1];
8b6eff	3400	}
A	3401	unset($data[$i]);
	3402	}
814baf	3403	else if ($data[$i] == '*') {
A	3404	if ($data[$i+1] == 'METADATA') {
	3405	$mbox = $data[$i+2];
	3406	unset($data[$i]); // "*"
	3407	unset($data[++$i]); // "METADATA"
	3408	unset($data[++$i]); // Mailbox
	3409	}
	3410	// get rid of other untagged responses
	3411	else {
	3412	unset($mbox);
	3413	unset($data[$i]);
	3414	}
8b6eff	3415	}
814baf	3416	else if (isset($mbox)) {
664680	3417	if ($data[++$i] !== null)
TB	3418	$result[$mbox][$data[$i-1]] = $data[$i];
8b6eff	3419	unset($data[$i]);
A	3420	unset($data[$i-1]);
814baf	3421	}
A	3422	else {
	3423	unset($data[$i]);
8b6eff	3424	}
A	3425	}
	3426	}
	3427
814baf	3428	return $result;
8b6eff	3429	}
A	3430	}
	3431
	3432	/**
	3433	* Send the SETANNOTATION command (draft-daboo-imap-annotatemore)
	3434	*
	3435	* @param string $mailbox Mailbox name
	3436	* @param array $data Data array where each item is an array with
	3437	* three elements: entry name, attribute name, value
	3438	*
	3439	* @return boolean True on success, False on failure
	3440	* @since 0.5-beta
	3441	*/
7fb0ae	3442	public function setAnnotation($mailbox, $data)
8b6eff	3443	{
A	3444	if (!is_array($data) \|\| empty($data)) {
c0ed78	3445	$this->setError(self::ERROR_COMMAND, "Wrong argument for SETANNOTATION command");
8b6eff	3446	return false;
A	3447	}
	3448
	3449	foreach ($data as $entry) {
f7221d	3450	// ANNOTATEMORE drafts before version 08 require quoted parameters
b5fb21	3451	$entries[] = sprintf('%s (%s %s)', $this->escape($entry[0], true),
A	3452	$this->escape($entry[1], true), $this->escape($entry[2], true));
8b6eff	3453	}
A	3454
	3455	$entries = implode(' ', $entries);
854cf2	3456	$result = $this->execute('SETANNOTATION', array(
A	3457	$this->escape($mailbox), $entries), self::COMMAND_NORESPONSE);
8b6eff	3458
854cf2	3459	return ($result == self::ERROR_OK);
8b6eff	3460	}
A	3461
	3462	/**
	3463	* Send the SETANNOTATION command with NIL values (draft-daboo-imap-annotatemore)
	3464	*
	3465	* @param string $mailbox Mailbox name
	3466	* @param array $data Data array where each item is an array with
	3467	* two elements: entry name and attribute name
	3468	*
	3469	* @return boolean True on success, False on failure
	3470	*
	3471	* @since 0.5-beta
	3472	*/
7fb0ae	3473	public function deleteAnnotation($mailbox, $data)
8b6eff	3474	{
A	3475	if (!is_array($data) \|\| empty($data)) {
c0ed78	3476	$this->setError(self::ERROR_COMMAND, "Wrong argument for SETANNOTATION command");
8b6eff	3477	return false;
A	3478	}
	3479
	3480	return $this->setAnnotation($mailbox, $data);
	3481	}
	3482
	3483	/**
	3484	* Send the GETANNOTATION command (draft-daboo-imap-annotatemore)
	3485	*
	3486	* @param string $mailbox Mailbox name
	3487	* @param array $entries Entries names
	3488	* @param array $attribs Attribs names
	3489	*
	3490	* @return array Annotations result on success, NULL on error
	3491	*
	3492	* @since 0.5-beta
	3493	*/
7fb0ae	3494	public function getAnnotation($mailbox, $entries, $attribs)
8b6eff	3495	{
A	3496	if (!is_array($entries)) {
	3497	$entries = array($entries);
	3498	}
746209	3499
8b6eff	3500	// create entries string
f7221d	3501	// ANNOTATEMORE drafts before version 08 require quoted parameters
8b6eff	3502	foreach ($entries as $idx => $name) {
f7221d	3503	$entries[$idx] = $this->escape($name, true);
8b6eff	3504	}
A	3505	$entries = '(' . implode(' ', $entries) . ')';
	3506
	3507	if (!is_array($attribs)) {
	3508	$attribs = array($attribs);
	3509	}
746209	3510
AM	3511	// create attributes string
8b6eff	3512	foreach ($attribs as $idx => $name) {
f7221d	3513	$attribs[$idx] = $this->escape($name, true);
8b6eff	3514	}
A	3515	$attribs = '(' . implode(' ', $attribs) . ')';
	3516
854cf2	3517	list($code, $response) = $this->execute('GETANNOTATION', array(
A	3518	$this->escape($mailbox), $entries, $attribs));
8b6eff	3519
814baf	3520	if ($code == self::ERROR_OK) {
A	3521	$result = array();
	3522	$data = $this->tokenizeResponse($response);
8b6eff	3523
A	3524	// Here we returns only data compatible with METADATA result format
	3525	if (!empty($data) && ($size = count($data))) {
	3526	for ($i=0; $i<$size; $i++) {
814baf	3527	$entry = $data[$i];
A	3528	if (isset($mbox) && is_array($entry)) {
8b6eff	3529	$attribs = $entry;
A	3530	$entry = $last_entry;
	3531	}
814baf	3532	else if ($entry == '*') {
A	3533	if ($data[$i+1] == 'ANNOTATION') {
	3534	$mbox = $data[$i+2];
	3535	unset($data[$i]); // "*"
	3536	unset($data[++$i]); // "ANNOTATION"
	3537	unset($data[++$i]); // Mailbox
	3538	}
	3539	// get rid of other untagged responses
	3540	else {
	3541	unset($mbox);
	3542	unset($data[$i]);
	3543	}
	3544	continue;
	3545	}
	3546	else if (isset($mbox)) {
	3547	$attribs = $data[++$i];
	3548	}
	3549	else {
	3550	unset($data[$i]);
	3551	continue;
	3552	}
8b6eff	3553
A	3554	if (!empty($attribs)) {
	3555	for ($x=0, $len=count($attribs); $x<$len;) {
	3556	$attr = $attribs[$x++];
	3557	$value = $attribs[$x++];
939380	3558	if ($attr == 'value.priv' && $value !== null) {
814baf	3559	$result[$mbox]['/private' . $entry] = $value;
c2c820	3560	}
939380	3561	else if ($attr == 'value.shared' && $value !== null) {
814baf	3562	$result[$mbox]['/shared' . $entry] = $value;
c2c820	3563	}
8b6eff	3564	}
A	3565	}
	3566	$last_entry = $entry;
814baf	3567	unset($data[$i]);
8b6eff	3568	}
A	3569	}
	3570
814baf	3571	return $result;
8b6eff	3572	}
854cf2	3573	}
A	3574
	3575	/**
80152b	3576	* Returns BODYSTRUCTURE for the specified message.
A	3577	*
	3578	* @param string $mailbox Folder name
	3579	* @param int $id Message sequence number or UID
	3580	* @param bool $is_uid True if $id is an UID
	3581	*
	3582	* @return array/bool Body structure array or False on error.
	3583	* @since 0.6
	3584	*/
7fb0ae	3585	public function getStructure($mailbox, $id, $is_uid = false)
80152b	3586	{
A	3587	$result = $this->fetch($mailbox, $id, $is_uid, array('BODYSTRUCTURE'));
7fb0ae	3588
80152b	3589	if (is_array($result)) {
A	3590	$result = array_shift($result);
	3591	return $result->bodystructure;
	3592	}
7fb0ae	3593
80152b	3594	return false;
A	3595	}
	3596
8a6503	3597	/**
A	3598	* Returns data of a message part according to specified structure.
	3599	*
	3600	* @param array $structure Message structure (getStructure() result)
	3601	* @param string $part Message part identifier
	3602	*
	3603	* @return array Part data as hash array (type, encoding, charset, size)
	3604	*/
7fb0ae	3605	public static function getStructurePartData($structure, $part)
80152b	3606	{
27bcb0	3607	$part_a = self::getStructurePartArray($structure, $part);
AM	3608	$data = array();
80152b	3609
27bcb0	3610	if (empty($part_a)) {
8a6503	3611	return $data;
A	3612	}
80152b	3613
8a6503	3614	// content-type
A	3615	if (is_array($part_a[0])) {
	3616	$data['type'] = 'multipart';
	3617	}
	3618	else {
	3619	$data['type'] = strtolower($part_a[0]);
80152b	3620
8a6503	3621	// encoding
A	3622	$data['encoding'] = strtolower($part_a[5]);
80152b	3623
8a6503	3624	// charset
A	3625	if (is_array($part_a[2])) {
	3626	while (list($key, $val) = each($part_a[2])) {
	3627	if (strcasecmp($val, 'charset') == 0) {
	3628	$data['charset'] = $part_a[2][$key+1];
	3629	break;
	3630	}
	3631	}
	3632	}
	3633	}
80152b	3634
8a6503	3635	// size
A	3636	$data['size'] = intval($part_a[6]);
	3637
	3638	return $data;
80152b	3639	}
A	3640
7fb0ae	3641	public static function getStructurePartArray($a, $part)
80152b	3642	{
27bcb0	3643	if (!is_array($a)) {
80152b	3644	return false;
A	3645	}
cc7544	3646
A	3647	if (empty($part)) {
27bcb0	3648	return $a;
AM	3649	}
cc7544	3650
A	3651	$ctype = is_string($a[0]) && is_string($a[1]) ? $a[0] . '/' . $a[1] : '';
	3652
	3653	if (strcasecmp($ctype, 'message/rfc822') == 0) {
	3654	$a = $a[8];
	3655	}
	3656
27bcb0	3657	if (strpos($part, '.') > 0) {
AM	3658	$orig_part = $part;
	3659	$pos = strpos($part, '.');
	3660	$rest = substr($orig_part, $pos+1);
	3661	$part = substr($orig_part, 0, $pos);
cc7544	3662
27bcb0	3663	return self::getStructurePartArray($a[$part-1], $rest);
AM	3664	}
cc7544	3665	else if ($part > 0) {
27bcb0	3666	return (is_array($a[$part-1])) ? $a[$part-1] : $a;
AM	3667	}
80152b	3668	}
A	3669
	3670	/**
854cf2	3671	* Creates next command identifier (tag)
A	3672	*
	3673	* @return string Command identifier
	3674	* @since 0.5-beta
	3675	*/
7fb0ae	3676	public function nextTag()
854cf2	3677	{
A	3678	$this->cmd_num++;
	3679	$this->cmd_tag = sprintf('A%04d', $this->cmd_num);
	3680
	3681	return $this->cmd_tag;
	3682	}
	3683
	3684	/**
	3685	* Sends IMAP command and parses result
	3686	*
	3687	* @param string $command IMAP command
	3688	* @param array $arguments Command arguments
	3689	* @param int $options Execution options
	3690	*
	3691	* @return mixed Response code or list of response code and data
	3692	* @since 0.5-beta
	3693	*/
7fb0ae	3694	public function execute($command, $arguments=array(), $options=0)
854cf2	3695	{
c0ed78	3696	$tag = $this->nextTag();
854cf2	3697	$query = $tag . ' ' . $command;
A	3698	$noresp = ($options & self::COMMAND_NORESPONSE);
	3699	$response = $noresp ? null : '';
	3700
c2c820	3701	if (!empty($arguments)) {
80152b	3702	foreach ($arguments as $arg) {
A	3703	$query .= ' ' . self::r_implode($arg);
	3704	}
c2c820	3705	}
854cf2	3706
A	3707	// Send command
774dea	3708	if (!$this->putLineC($query, true, ($options & self::COMMAND_ANONYMIZED))) {
c0ed78	3709	$this->setError(self::ERROR_COMMAND, "Unable to send command: $query");
c2c820	3710	return $noresp ? self::ERROR_COMMAND : array(self::ERROR_COMMAND, '');
A	3711	}
854cf2	3712
A	3713	// Parse response
c2c820	3714	do {
A	3715	$line = $this->readLine(4096);
	3716	if ($response !== null) {
	3717	$response .= $line;
	3718	}
7fb0ae	3719	}
AM	3720	while (!$this->startsWith($line, $tag . ' ', true, true));
854cf2	3721
c2c820	3722	$code = $this->parseResult($line, $command . ': ');
854cf2	3723
A	3724	// Remove last line from response
c2c820	3725	if ($response) {
A	3726	$line_len = min(strlen($response), strlen($line) + 2);
854cf2	3727	$response = substr($response, 0, -$line_len);
A	3728	}
	3729
c2c820	3730	// optional CAPABILITY response
A	3731	if (($options & self::COMMAND_CAPABILITY) && $code == self::ERROR_OK
781f0c	3732	&& preg_match('/\[CAPABILITY ([^]]+)\]/i', $line, $matches)
A	3733	) {
c2c820	3734	$this->parseCapability($matches[1], true);
A	3735	}
781f0c	3736
90f81a	3737	// return last line only (without command tag, result and response code)
d903fb	3738	if ($line && ($options & self::COMMAND_LASTLINE)) {
90f81a	3739	$response = preg_replace("/^$tag (OK\|NO\|BAD\|BYE\|PREAUTH)?\s(\[[a-z-]+\])?\s/i", '', trim($line));
d903fb	3740	}
A	3741
c2c820	3742	return $noresp ? $code : array($code, $response);
8b6eff	3743	}
A	3744
	3745	/**
	3746	* Splits IMAP response into string tokens
	3747	*
	3748	* @param string &$str The IMAP's server response
	3749	* @param int $num Number of tokens to return
	3750	*
	3751	* @return mixed Tokens array or string if $num=1
	3752	* @since 0.5-beta
	3753	*/
7fb0ae	3754	public static function tokenizeResponse(&$str, $num=0)
8b6eff	3755	{
A	3756	$result = array();
	3757
	3758	while (!$num \|\| count($result) < $num) {
	3759	// remove spaces from the beginning of the string
	3760	$str = ltrim($str);
	3761
	3762	switch ($str[0]) {
	3763
	3764	// String literal
	3765	case '{':
	3766	if (($epos = strpos($str, "}\r\n", 1)) == false) {
	3767	// error
	3768	}
	3769	if (!is_numeric(($bytes = substr($str, 1, $epos - 1)))) {
	3770	// error
	3771	}
ca34ba	3772
80152b	3773	$result[] = $bytes ? substr($str, $epos + 3, $bytes) : '';
ca34ba	3774	$str = substr($str, $epos + 3 + $bytes);
c2c820	3775	break;
8b6eff	3776
A	3777	// Quoted string
	3778	case '"':
	3779	$len = strlen($str);
	3780
	3781	for ($pos=1; $pos<$len; $pos++) {
	3782	if ($str[$pos] == '"') {
	3783	break;
	3784	}
	3785	if ($str[$pos] == "\\") {
	3786	if ($str[$pos + 1] == '"' \|\| $str[$pos + 1] == "\\") {
	3787	$pos++;
	3788	}
	3789	}
	3790	}
ca34ba	3791
8b6eff	3792	// we need to strip slashes for a quoted string
A	3793	$result[] = stripslashes(substr($str, 1, $pos - 1));
	3794	$str = substr($str, $pos + 1);
c2c820	3795	break;
8b6eff	3796
A	3797	// Parenthesized list
	3798	case '(':
ca34ba	3799	$str = substr($str, 1);
8b6eff	3800	$result[] = self::tokenizeResponse($str);
c2c820	3801	break;
ca34ba	3802
8b6eff	3803	case ')':
A	3804	$str = substr($str, 1);
	3805	return $result;
	3806
6e57fb	3807	// String atom, number, astring, NIL, *, %
8b6eff	3808	default:
923052	3809	// empty string
A	3810	if ($str === '' \|\| $str === null) {
8b6eff	3811	break 2;
A	3812	}
	3813
6e57fb	3814	// excluded chars: SP, CTL, ), DEL
AM	3815	// we do not exclude [ and ] (#1489223)
	3816	if (preg_match('/^([^\x00-\x20\x29\x7F]+)/', $str, $m)) {
86b241	3817	$result[] = $m[1] == 'NIL' ? null : $m[1];
ca34ba	3818	$str = substr($str, strlen($m[1]));
8b6eff	3819	}
c2c820	3820	break;
8b6eff	3821	}
A	3822	}
	3823
	3824	return $num == 1 ? $result[0] : $result;
80152b	3825	}
A	3826
7fb0ae	3827	protected static function r_implode($element)
80152b	3828	{
A	3829	$string = '';
	3830
	3831	if (is_array($element)) {
	3832	reset($element);
3725cf	3833	foreach ($element as $value) {
80152b	3834	$string .= ' ' . self::r_implode($value);
A	3835	}
	3836	}
	3837	else {
	3838	return $element;
	3839	}
	3840
	3841	return '(' . trim($string) . ')';
8b6eff	3842	}
A	3843
e361bf	3844	/**
A	3845	* Converts message identifiers array into sequence-set syntax
	3846	*
	3847	* @param array $messages Message identifiers
	3848	* @param bool $force Forces compression of any size
	3849	*
	3850	* @return string Compressed sequence-set
	3851	*/
7fb0ae	3852	public static function compressMessageSet($messages, $force=false)
e361bf	3853	{
A	3854	// given a comma delimited list of independent mid's,
	3855	// compresses by grouping sequences together
	3856
	3857	if (!is_array($messages)) {
	3858	// if less than 255 bytes long, let's not bother
	3859	if (!$force && strlen($messages)<255) {
	3860	return $messages;
d9dc32	3861	}
e361bf	3862
A	3863	// see if it's already been compressed
	3864	if (strpos($messages, ':') !== false) {
	3865	return $messages;
	3866	}
	3867
	3868	// separate, then sort
	3869	$messages = explode(',', $messages);
	3870	}
	3871
	3872	sort($messages);
	3873
	3874	$result = array();
	3875	$start = $prev = $messages[0];
	3876
	3877	foreach ($messages as $id) {
	3878	$incr = $id - $prev;
	3879	if ($incr > 1) { // found a gap
	3880	if ($start == $prev) {
	3881	$result[] = $prev; // push single id
7fb0ae	3882	}
AM	3883	else {
e361bf	3884	$result[] = $start . ':' . $prev; // push sequence as start_id:end_id
A	3885	}
	3886	$start = $id; // start of new sequence
	3887	}
	3888	$prev = $id;
	3889	}
	3890
	3891	// handle the last sequence/id
	3892	if ($start == $prev) {
	3893	$result[] = $prev;
7fb0ae	3894	}
AM	3895	else {
e361bf	3896	$result[] = $start.':'.$prev;
A	3897	}
	3898
	3899	// return as comma separated string
	3900	return implode(',', $result);
	3901	}
	3902
	3903	/**
	3904	* Converts message sequence-set into array
	3905	*
	3906	* @param string $messages Message identifiers
	3907	*
	3908	* @return array List of message identifiers
	3909	*/
7fb0ae	3910	public static function uncompressMessageSet($messages)
e361bf	3911	{
e68fa7	3912	if (empty($messages)) {
AM	3913	return array();
	3914	}
	3915
e361bf	3916	$result = array();
A	3917	$messages = explode(',', $messages);
	3918
	3919	foreach ($messages as $idx => $part) {
	3920	$items = explode(':', $part);
	3921	$max = max($items[0], $items[1]);
	3922
	3923	for ($x=$items[0]; $x<=$max; $x++) {
e68fa7	3924	$result[] = (int)$x;
e361bf	3925	}
A	3926	unset($messages[$idx]);
	3927	}
	3928
	3929	return $result;
	3930	}
	3931
232bcd	3932	protected function _xor($string, $string2)
59c216	3933	{
c2c820	3934	$result = '';
A	3935	$size = strlen($string);
	3936
	3937	for ($i=0; $i<$size; $i++) {
	3938	$result .= chr(ord($string[$i]) ^ ord($string2[$i]));
	3939	}
	3940
	3941	return $result;
59c216	3942	}
A	3943
8b6eff	3944	/**
1422b0	3945	* Clear internal status cache
AM	3946	*/
	3947	protected function clear_status_cache($mailbox)
	3948	{
	3949	unset($this->data['STATUS:' . $mailbox]);
85f420	3950
AM	3951	$keys = array('EXISTS', 'RECENT', 'UNSEEN', 'UID-MAP');
	3952
	3953	foreach ($keys as $key) {
	3954	unset($this->data[$key]);
	3955	}
	3956	}
	3957
	3958	/**
	3959	* Clear internal cache of the current mailbox
	3960	*/
	3961	protected function clear_mailbox_cache()
	3962	{
	3963	$this->clear_status_cache($this->selected);
	3964
	3965	$keys = array('UIDNEXT', 'UIDVALIDITY', 'HIGHESTMODSEQ', 'NOMODSEQ',
	3966	'PERMANENTFLAGS', 'QRESYNC', 'VANISHED', 'READ-WRITE');
	3967
	3968	foreach ($keys as $key) {
	3969	unset($this->data[$key]);
	3970	}
1422b0	3971	}
AM	3972
	3973	/**
00891e	3974	* Converts flags array into string for inclusion in IMAP command
AM	3975	*
	3976	* @param array $flags Flags (see self::flags)
	3977	*
	3978	* @return string Space-separated list of flags
	3979	*/
232bcd	3980	protected function flagsToStr($flags)
00891e	3981	{
AM	3982	foreach ((array)$flags as $idx => $flag) {
	3983	if ($flag = $this->flags[strtoupper($flag)]) {
	3984	$flags[$idx] = $flag;
	3985	}
	3986	}
	3987
	3988	return implode(' ', (array)$flags);
	3989	}
	3990
	3991	/**
8b6eff	3992	* Converts datetime string into unix timestamp
A	3993	*
	3994	* @param string $date Date string
	3995	*
	3996	* @return int Unix timestamp
	3997	*/
7fb0ae	3998	protected static function strToTime($date)
59c216	3999	{
b7570f	4000	// Clean malformed data
AM	4001	$date = preg_replace(
	4002	array(
	4003	'/GMT\s*([+-][0-9]+)/', // support non-standard "GMTXXXX" literal
	4004	'/[^a-z0-9\x20\x09:+-]/i', // remove any invalid characters
	4005	'/\s(Mon\|Tue\|Wed\|Thu\|Fri\|Sat\|Sun)\s/i', // remove weekday names
	4006	),
	4007	array(
	4008	'\\1',
	4009	'',
	4010	'',
	4011	), $date);
	4012
	4013	$date = trim($date);
59c216	4014
f66f5f	4015	// if date parsing fails, we have a date in non-rfc format
A	4016	// remove token from the end and try again
	4017	while (($ts = intval(@strtotime($date))) <= 0) {
	4018	$d = explode(' ', $date);
	4019	array_pop($d);
	4020	if (empty($d)) {
	4021	break;
	4022	}
	4023	$date = implode(' ', $d);
c2c820	4024	}
f66f5f	4025
A	4026	return $ts < 0 ? 0 : $ts;
59c216	4027	}
A	4028
e361bf	4029	/**
A	4030	* CAPABILITY response parser
	4031	*/
232bcd	4032	protected function parseCapability($str, $trusted=false)
d83351	4033	{
854cf2	4034	$str = preg_replace('/^\* CAPABILITY /i', '', $str);
A	4035
d83351	4036	$this->capability = explode(' ', strtoupper($str));
A	4037
ed3e51	4038	if (!empty($this->prefs['disabled_caps'])) {
AM	4039	$this->capability = array_diff($this->capability, $this->prefs['disabled_caps']);
	4040	}
	4041
d83351	4042	if (!isset($this->prefs['literal+']) && in_array('LITERAL+', $this->capability)) {
A	4043	$this->prefs['literal+'] = true;
5251ec	4044	}
AM	4045
475760	4046	if ($trusted) {
A	4047	$this->capability_readed = true;
	4048	}
d83351	4049	}
A	4050
a85f88	4051	/**
A	4052	* Escapes a string when it contains special characters (RFC3501)
	4053	*
f7221d	4054	* @param string $string IMAP string
b5fb21	4055	* @param boolean $force_quotes Forces string quoting (for atoms)
a85f88	4056	*
b5fb21	4057	* @return string String atom, quoted-string or string literal
A	4058	* @todo lists
a85f88	4059	*/
7fb0ae	4060	public static function escape($string, $force_quotes=false)
59c216	4061	{
a85f88	4062	if ($string === null) {
A	4063	return 'NIL';
	4064	}
8b3c68	4065
b5fb21	4066	if ($string === '') {
a85f88	4067	return '""';
A	4068	}
8b3c68	4069
b5fb21	4070	// atom-string (only safe characters)
8b3c68	4071	if (!$force_quotes && !preg_match('/[\x00-\x20\x22\x25\x28-\x2A\x5B-\x5D\x7B\x7D\x80-\xFF]/', $string)) {
b5fb21	4072	return $string;
A	4073	}
8b3c68	4074
b5fb21	4075	// quoted-string
A	4076	if (!preg_match('/[\r\n\x00\x80-\xFF]/', $string)) {
261ea4	4077	return '"' . addcslashes($string, '\\"') . '"';
a85f88	4078	}
A	4079
b5fb21	4080	// literal-string
A	4081	return sprintf("{%d}\r\n%s", strlen($string), $string);
59c216	4082	}
A	4083
e361bf	4084	/**
7f1da4	4085	* Set the value of the debugging flag.
A	4086	*
9b8d22	4087	* @param boolean $debug New value for the debugging flag.
AM	4088	* @param callback $handler Logging handler function
7f1da4	4089	*
9b8d22	4090	* @since 0.5-stable
7f1da4	4091	*/
7fb0ae	4092	public function setDebug($debug, $handler = null)
7f1da4	4093	{
7fb0ae	4094	$this->debug = $debug;
86b241	4095	$this->debug_handler = $handler;
7f1da4	4096	}
A	4097
	4098	/**
	4099	* Write the given debug text to the current debug output handler.
	4100	*
9b8d22	4101	* @param string $message Debug mesage text.
7f1da4	4102	*
9b8d22	4103	* @since 0.5-stable
7f1da4	4104	*/
232bcd	4105	protected function debug($message)
7f1da4	4106	{
9b8d22	4107	if (($len = strlen($message)) > self::DEBUG_LINE_LENGTH) {
43079d	4108	$diff = $len - self::DEBUG_LINE_LENGTH;
AM	4109	$message = substr($message, 0, self::DEBUG_LINE_LENGTH)
	4110	. "... [truncated $diff bytes]";
9b8d22	4111	}
AM	4112
0c7fe2	4113	if ($this->resourceid) {
A	4114	$message = sprintf('[%s] %s', $this->resourceid, $message);
	4115	}
	4116
86b241	4117	if ($this->debug_handler) {
AM	4118	call_user_func_array($this->debug_handler, array(&$this, $message));
7fb0ae	4119	}
AM	4120	else {
7f1da4	4121	echo "DEBUG: $message\n";
A	4122	}
	4123	}
59c216	4124	}