githubFork/roundcubemail.git

Unified attachments filenames handling for message parts without a filename

Aleksander Machniak

2012-12-28 be72fb3597c21ca3aaa058adf41bb72d53d197c7

commit \| author \| age
0d94fd	1	<?php
AM	2
3d231c	3	/**
0d94fd	4	+-----------------------------------------------------------------------+
AM	5	\| This file is part of the Roundcube Webmail client \|
	6	\| Copyright (C) 2005-2012, The Roundcube Dev Team \|
	7	\| \|
	8	\| Licensed under the GNU General Public License version 3 or \|
	9	\| any later version with exceptions for skins & plugins. \|
	10	\| See the README file for a full license statement. \|
	11	\| \|
	12	\| PURPOSE: \|
	13	\| Database wrapper class that implements PHP PDO functions \|
	14	+-----------------------------------------------------------------------+
	15	\| Author: Aleksander Machniak <alec@alec.pl> \|
	16	+-----------------------------------------------------------------------+
	17	*/
	18
	19	/**
9ab346	20	* Database independent query interface.
AM	21	* This is a wrapper for the PHP PDO.
0d94fd	22	*
9ab346	23	* @package Framework
a07224	24	* @subpackage Database
0d94fd	25	*/
AM	26	class rcube_db
	27	{
88107d	28	public $db_provider;
TB	29
0d94fd	30	protected $db_dsnw; // DSN for write operations
AM	31	protected $db_dsnr; // DSN for read operations
	32	protected $db_connected = false; // Already connected ?
	33	protected $db_mode; // Connection mode
	34	protected $dbh; // Connection handle
	35
a39859	36	protected $db_error = false;
AM	37	protected $db_error_msg = '';
	38	protected $conn_failure = false;
	39	protected $db_index = 0;
	40	protected $last_result;
0d94fd	41	protected $tables;
c389a8	42	protected $variables;
0d94fd	43
AM	44	protected $options = array(
	45	// column/table quotes
	46	'identifier_start' => '"',
	47	'identifier_end' => '"',
	48	);
	49
	50
	51	/**
	52	* Factory, returns driver-specific instance of the class
	53	*
3d231c	54	* @param string $db_dsnw DSN for read/write operations
AM	55	* @param string $db_dsnr Optional DSN for read only operations
	56	* @param bool $pconn Enables persistent connections
0d94fd	57	*
3d231c	58	* @return rcube_db Object instance
0d94fd	59	*/
AM	60	public static function factory($db_dsnw, $db_dsnr = '', $pconn = false)
	61	{
	62	$driver = strtolower(substr($db_dsnw, 0, strpos($db_dsnw, ':')));
	63	$driver_map = array(
	64	'sqlite2' => 'sqlite',
	65	'sybase' => 'mssql',
	66	'dblib' => 'mssql',
1a2b50	67	'mysqli' => 'mysql',
0d94fd	68	);
AM	69
	70	$driver = isset($driver_map[$driver]) ? $driver_map[$driver] : $driver;
	71	$class = "rcube_db_$driver";
	72
	73	if (!class_exists($class)) {
	74	rcube::raise_error(array('code' => 600, 'type' => 'db',
	75	'line' => __LINE__, 'file' => __FILE__,
	76	'message' => "Configuration error. Unsupported database driver: $driver"),
	77	true, true);
	78	}
	79
	80	return new $class($db_dsnw, $db_dsnr, $pconn);
	81	}
	82
	83	/**
	84	* Object constructor
	85	*
3d231c	86	* @param string $db_dsnw DSN for read/write operations
AM	87	* @param string $db_dsnr Optional DSN for read only operations
	88	* @param bool $pconn Enables persistent connections
0d94fd	89	*/
AM	90	public function __construct($db_dsnw, $db_dsnr = '', $pconn = false)
	91	{
	92	if (empty($db_dsnr)) {
	93	$db_dsnr = $db_dsnw;
	94	}
	95
	96	$this->db_dsnw = $db_dsnw;
	97	$this->db_dsnr = $db_dsnr;
	98	$this->db_pconn = $pconn;
	99
	100	$this->db_dsnw_array = self::parse_dsn($db_dsnw);
	101	$this->db_dsnr_array = self::parse_dsn($db_dsnr);
	102
	103	// Initialize driver class
	104	$this->init();
	105	}
	106
3e386e	107	/**
AM	108	* Initialization of the object with driver specific code
	109	*/
0d94fd	110	protected function init()
AM	111	{
	112	// To be used by driver classes
	113	}
	114
	115	/**
	116	* Connect to specific database
	117	*
3d231c	118	* @param array $dsn DSN for DB connections
0d94fd	119	*
AM	120	* @return PDO database handle
	121	*/
	122	protected function dsn_connect($dsn)
	123	{
	124	$this->db_error = false;
	125	$this->db_error_msg = null;
	126
	127	// Get database specific connection options
	128	$dsn_string = $this->dsn_string($dsn);
	129	$dsn_options = $this->dsn_options($dsn);
	130
	131	if ($db_pconn) {
	132	$dsn_options[PDO::ATTR_PERSISTENT] = true;
	133	}
	134
	135	// Connect
	136	try {
e6e5cb	137	// with this check we skip fatal error on PDO object creation
AM	138	if (!class_exists('PDO', false)) {
	139	throw new Exception('PDO extension not loaded. See http://php.net/manual/en/intro.pdo.php');
	140	}
	141
0d94fd	142	$this->conn_prepare($dsn);
AM	143
	144	$dbh = new PDO($dsn_string, $dsn['username'], $dsn['password'], $dsn_options);
	145
	146	// don't throw exceptions or warnings
	147	$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT);
	148	}
e6e5cb	149	catch (Exception $e) {
0d94fd	150	$this->db_error = true;
AM	151	$this->db_error_msg = $e->getMessage();
	152
	153	rcube::raise_error(array('code' => 500, 'type' => 'db',
	154	'line' => __LINE__, 'file' => __FILE__,
	155	'message' => $this->db_error_msg), true, false);
	156
	157	return null;
	158	}
	159
	160	$this->conn_configure($dsn, $dbh);
	161
	162	return $dbh;
	163	}
	164
3e386e	165	/**
AM	166	* Driver-specific preparation of database connection
	167	*
3d231c	168	* @param array $dsn DSN for DB connections
3e386e	169	*/
0d94fd	170	protected function conn_prepare($dsn)
AM	171	{
	172	}
	173
3e386e	174	/**
AM	175	* Driver-specific configuration of database connection
	176	*
3d231c	177	* @param array $dsn DSN for DB connections
AM	178	* @param PDO $dbh Connection handler
3e386e	179	*/
0d94fd	180	protected function conn_configure($dsn, $dbh)
AM	181	{
	182	}
	183
3e386e	184	/**
AM	185	* Driver-specific database character set setting
	186	*
3d231c	187	* @param string $charset Character set name
3e386e	188	*/
AM	189	protected function set_charset($charset)
	190	{
	191	$this->query("SET NAMES 'utf8'");
	192	}
0d94fd	193
AM	194	/**
654ac1	195	* Connect to appropriate database depending on the operation
0d94fd	196	*
3d231c	197	* @param string $mode Connection mode (r\|w)
0d94fd	198	*/
AM	199	public function db_connect($mode)
	200	{
	201	// previous connection failed, don't attempt to connect again
	202	if ($this->conn_failure) {
	203	return;
	204	}
	205
	206	// no replication
	207	if ($this->db_dsnw == $this->db_dsnr) {
	208	$mode = 'w';
	209	}
	210
	211	// Already connected
	212	if ($this->db_connected) {
	213	// connected to db with the same or "higher" mode
	214	if ($this->db_mode == 'w' \|\| $this->db_mode == $mode) {
	215	return;
	216	}
	217	}
	218
	219	$dsn = ($mode == 'r') ? $this->db_dsnr_array : $this->db_dsnw_array;
	220
	221	$this->dbh = $this->dsn_connect($dsn);
	222	$this->db_connected = is_object($this->dbh);
	223
	224	// use write-master when read-only fails
	225	if (!$this->db_connected && $mode == 'r') {
	226	$mode = 'w';
	227	$this->dbh = $this->dsn_connect($this->db_dsnw_array);
	228	$this->db_connected = is_object($this->dbh);
	229	}
	230
	231	if ($this->db_connected) {
	232	$this->db_mode = $mode;
	233	$this->set_charset('utf8');
	234	}
	235	else {
	236	$this->conn_failure = true;
	237	}
	238	}
	239
	240	/**
	241	* Activate/deactivate debug mode
	242	*
	243	* @param boolean $dbg True if SQL queries should be logged
	244	*/
	245	public function set_debug($dbg = true)
	246	{
	247	$this->options['debug_mode'] = $dbg;
	248	}
	249
	250	/**
329eae	251	* Writes debug information/query to 'sql' log file
AM	252	*
	253	* @param string $query SQL query
	254	*/
	255	protected function debug($query)
	256	{
	257	if ($this->options['debug_mode']) {
	258	rcube::write_log('sql', '[' . (++$this->db_index) . '] ' . $query . ';');
	259	}
	260	}
	261
	262	/**
0d94fd	263	* Getter for error state
AM	264	*
a39859	265	* @param mixed $result Optional query result
ea08d4	266	*
154425	267	* @return string Error message
0d94fd	268	*/
a39859	269	public function is_error($result = null)
0d94fd	270	{
a39859	271	if ($result !== null) {
AM	272	return $result === false ? $this->db_error_msg : null;
ea08d4	273	}
AM	274
154425	275	return $this->db_error ? $this->db_error_msg : null;
0d94fd	276	}
AM	277
	278	/**
	279	* Connection state checker
	280	*
3d231c	281	* @return boolean True if in connected state
0d94fd	282	*/
AM	283	public function is_connected()
	284	{
	285	return !is_object($this->dbh) ? false : $this->db_connected;
	286	}
	287
	288	/**
	289	* Is database replication configured?
3d231c	290	*
AM	291	* @return bool Returns true if dsnw != dsnr
0d94fd	292	*/
AM	293	public function is_replicated()
	294	{
	295	return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
	296	}
	297
	298	/**
c389a8	299	* Get database runtime variables
AM	300	*
3d231c	301	* @param string $varname Variable name
AM	302	* @param mixed $default Default value if variable is not set
c389a8	303	*
AM	304	* @return mixed Variable value or default
	305	*/
	306	public function get_variable($varname, $default = null)
	307	{
	308	// to be implemented by driver class
	309	return $default;
	310	}
	311
	312	/**
0d94fd	313	* Execute a SQL query
AM	314	*
3d231c	315	* @param string SQL query to execute
AM	316	* @param mixed Values to be inserted in query
0d94fd	317	*
AM	318	* @return number Query handle identifier
	319	*/
	320	public function query()
	321	{
	322	$params = func_get_args();
	323	$query = array_shift($params);
	324
	325	// Support one argument of type array, instead of n arguments
	326	if (count($params) == 1 && is_array($params[0])) {
	327	$params = $params[0];
	328	}
	329
	330	return $this->_query($query, 0, 0, $params);
	331	}
	332
	333	/**
	334	* Execute a SQL query with limits
	335	*
3d231c	336	* @param string SQL query to execute
AM	337	* @param int Offset for LIMIT statement
	338	* @param int Number of rows for LIMIT statement
	339	* @param mixed Values to be inserted in query
0d94fd	340	*
a39859	341	* @return PDOStatement\|bool Query handle or False on error
0d94fd	342	*/
AM	343	public function limitquery()
	344	{
	345	$params = func_get_args();
	346	$query = array_shift($params);
	347	$offset = array_shift($params);
	348	$numrows = array_shift($params);
	349
	350	return $this->_query($query, $offset, $numrows, $params);
	351	}
	352
	353	/**
	354	* Execute a SQL query with limits
	355	*
3d231c	356	* @param string $query SQL query to execute
AM	357	* @param int $offset Offset for LIMIT statement
	358	* @param int $numrows Number of rows for LIMIT statement
	359	* @param array $params Values to be inserted in query
	360	*
a39859	361	* @return PDOStatement\|bool Query handle or False on error
0d94fd	362	*/
AM	363	protected function _query($query, $offset, $numrows, $params)
	364	{
	365	// Read or write ?
c389a8	366	$mode = preg_match('/^(select\|show)/i', ltrim($query)) ? 'r' : 'w';
0d94fd	367
AM	368	$this->db_connect($mode);
	369
	370	// check connection before proceeding
	371	if (!$this->is_connected()) {
a39859	372	return $this->last_result = false;
0d94fd	373	}
AM	374
	375	if ($numrows \|\| $offset) {
	376	$query = $this->set_limit($query, $numrows, $offset);
	377	}
	378
	379	$params = (array) $params;
	380
	381	// Because in Roundcube we mostly use queries that are
	382	// executed only once, we will not use prepared queries
	383	$pos = 0;
	384	$idx = 0;
	385
	386	while ($pos = strpos($query, '?', $pos)) {
13969c	387	if ($query[$pos+1] == '?') { // skip escaped ?
TB	388	$pos += 2;
	389	}
	390	else {
	391	$val = $this->quote($params[$idx++]);
	392	unset($params[$idx-1]);
	393	$query = substr_replace($query, $val, $pos, 1);
	394	$pos += strlen($val);
	395	}
0d94fd	396	}
AM	397
13969c	398	// replace escaped ? back to normal
TB	399	$query = rtrim(strtr($query, array('??' => '?')), ';');
0d94fd	400
329eae	401	$this->debug($query);
0d94fd	402
a61326	403	// destroy reference to previous result, required for SQLite driver (#1488874)
AM	404	$this->last_result = null;
	405
	406	// send query
0d94fd	407	$query = $this->dbh->query($query);
AM	408
	409	if ($query === false) {
	410	$error = $this->dbh->errorInfo();
	411	$this->db_error = true;
	412	$this->db_error_msg = sprintf('[%s] %s', $error[1], $error[2]);
	413
	414	rcube::raise_error(array('code' => 500, 'type' => 'db',
	415	'line' => __LINE__, 'file' => __FILE__,
	416	'message' => $this->db_error_msg), true, false);
	417	}
	418
a39859	419	$this->last_result = $query;
AM	420
	421	return $query;
0d94fd	422	}
AM	423
	424	/**
	425	* Get number of affected rows for the last query
	426	*
a39859	427	* @param mixed $result Optional query handle
3d231c	428	*
679b37	429	* @return int Number of (matching) rows
0d94fd	430	*/
a39859	431	public function affected_rows($result = null)
0d94fd	432	{
a39859	433	if ($result \|\| ($result === null && ($result = $this->last_result))) {
0d94fd	434	return $result->rowCount();
AM	435	}
	436
	437	return 0;
	438	}
	439
	440	/**
	441	* Get last inserted record ID
	442	*
3d231c	443	* @param string $table Table name (to find the incremented sequence)
0d94fd	444	*
3d231c	445	* @return mixed ID or false on failure
0d94fd	446	*/
AM	447	public function insert_id($table = '')
	448	{
	449	if (!$this->db_connected \|\| $this->db_mode == 'r') {
	450	return false;
	451	}
	452
	453	if ($table) {
	454	// resolve table name
	455	$table = $this->table_name($table);
	456	}
	457
	458	$id = $this->dbh->lastInsertId($table);
	459
	460	return $id;
	461	}
	462
	463	/**
	464	* Get an associative array for one row
	465	* If no query handle is specified, the last query will be taken as reference
	466	*
a39859	467	* @param mixed $result Optional query handle
0d94fd	468	*
3d231c	469	* @return mixed Array with col values or false on failure
0d94fd	470	*/
a39859	471	public function fetch_assoc($result = null)
0d94fd	472	{
AM	473	return $this->_fetch_row($result, PDO::FETCH_ASSOC);
	474	}
	475
	476	/**
	477	* Get an index array for one row
	478	* If no query handle is specified, the last query will be taken as reference
	479	*
a39859	480	* @param mixed $result Optional query handle
0d94fd	481	*
3d231c	482	* @return mixed Array with col values or false on failure
0d94fd	483	*/
a39859	484	public function fetch_array($result = null)
0d94fd	485	{
AM	486	return $this->_fetch_row($result, PDO::FETCH_NUM);
	487	}
	488
	489	/**
	490	* Get col values for a result row
	491	*
a39859	492	* @param mixed $result Optional query handle
AM	493	* @param int $mode Fetch mode identifier
0d94fd	494	*
3d231c	495	* @return mixed Array with col values or false on failure
0d94fd	496	*/
AM	497	protected function _fetch_row($result, $mode)
	498	{
a39859	499	if ($result \|\| ($result === null && ($result = $this->last_result))) {
AM	500	return $result->fetch($mode);
0d94fd	501	}
AM	502
a39859	503	return false;
0d94fd	504	}
AM	505
	506	/**
	507	* Adds LIMIT,OFFSET clauses to the query
	508	*
3d231c	509	* @param string $query SQL query
AM	510	* @param int $limit Number of rows
	511	* @param int $offset Offset
8c2375	512	*
AM	513	* @return string SQL query
0d94fd	514	*/
AM	515	protected function set_limit($query, $limit = 0, $offset = 0)
	516	{
	517	if ($limit) {
	518	$query .= ' LIMIT ' . intval($limit);
	519	}
	520
	521	if ($offset) {
	522	$query .= ' OFFSET ' . intval($offset);
	523	}
	524
	525	return $query;
	526	}
	527
	528	/**
	529	* Returns list of tables in a database
	530	*
	531	* @return array List of all tables of the current database
	532	*/
	533	public function list_tables()
	534	{
	535	// get tables if not cached
	536	if ($this->tables === null) {
	537	$q = $this->query('SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES ORDER BY TABLE_NAME');
	538
a39859	539	if ($q) {
AM	540	$this->tables = $q->fetchAll(PDO::FETCH_COLUMN, 0);
0d94fd	541	}
AM	542	else {
	543	$this->tables = array();
	544	}
	545	}
	546
	547	return $this->tables;
	548	}
	549
	550	/**
	551	* Returns list of columns in database table
	552	*
3d231c	553	* @param string $table Table name
0d94fd	554	*
AM	555	* @return array List of table cols
	556	*/
	557	public function list_cols($table)
	558	{
	559	$q = $this->query('SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ?',
	560	array($table));
	561
a39859	562	if ($q) {
AM	563	return $q->fetchAll(PDO::FETCH_COLUMN, 0);
0d94fd	564	}
AM	565
	566	return array();
	567	}
	568
	569	/**
	570	* Formats input so it can be safely used in a query
	571	*
3d231c	572	* @param mixed $input Value to quote
AM	573	* @param string $type Type of data
0d94fd	574	*
3d231c	575	* @return string Quoted/converted string for use in query
0d94fd	576	*/
AM	577	public function quote($input, $type = null)
	578	{
	579	// handle int directly for better performance
	580	if ($type == 'integer' \|\| $type == 'int') {
	581	return intval($input);
	582	}
	583
0db8d0	584	if (is_null($input)) {
TB	585	return 'NULL';
	586	}
	587
0d94fd	588	// create DB handle if not available
AM	589	if (!$this->dbh) {
	590	$this->db_connect('r');
	591	}
	592
	593	if ($this->dbh) {
	594	$map = array(
	595	'bool' => PDO::PARAM_BOOL,
	596	'integer' => PDO::PARAM_INT,
	597	);
	598	$type = isset($map[$type]) ? $map[$type] : PDO::PARAM_STR;
13969c	599	return strtr($this->dbh->quote($input, $type), array('?' => '??')); // escape ?
0d94fd	600	}
AM	601
	602	return 'NULL';
	603	}
	604
	605	/**
	606	* Quotes a string so it can be safely used as a table or column name
	607	*
3d231c	608	* @param string $str Value to quote
0d94fd	609	*
3d231c	610	* @return string Quoted string for use in query
AM	611	* @deprecated Replaced by rcube_db::quote_identifier
	612	* @see rcube_db::quote_identifier
0d94fd	613	*/
AM	614	public function quoteIdentifier($str)
	615	{
	616	return $this->quote_identifier($str);
	617	}
	618
	619	/**
	620	* Quotes a string so it can be safely used as a table or column name
	621	*
3d231c	622	* @param string $str Value to quote
0d94fd	623	*
3d231c	624	* @return string Quoted string for use in query
0d94fd	625	*/
AM	626	public function quote_identifier($str)
	627	{
	628	$start = $this->options['identifier_start'];
	629	$end = $this->options['identifier_end'];
	630	$name = array();
	631
	632	foreach (explode('.', $str) as $elem) {
	633	$elem = str_replace(array($start, $end), '', $elem);
	634	$name[] = $start . $elem . $end;
	635	}
	636
	637	return implode($name, '.');
	638	}
	639
	640	/**
	641	* Return SQL function for current time and date
	642	*
	643	* @return string SQL function to use in query
	644	*/
	645	public function now()
	646	{
	647	return "now()";
	648	}
	649
	650	/**
	651	* Return list of elements for use with SQL's IN clause
	652	*
3d231c	653	* @param array $arr Input array
AM	654	* @param string $type Type of data
0d94fd	655	*
AM	656	* @return string Comma-separated list of quoted values for use in query
	657	*/
	658	public function array2list($arr, $type = null)
	659	{
	660	if (!is_array($arr)) {
	661	return $this->quote($arr, $type);
	662	}
	663
	664	foreach ($arr as $idx => $item) {
	665	$arr[$idx] = $this->quote($item, $type);
	666	}
	667
	668	return implode(',', $arr);
	669	}
	670
	671	/**
	672	* Return SQL statement to convert a field value into a unix timestamp
	673	*
	674	* This method is deprecated and should not be used anymore due to limitations
	675	* of timestamp functions in Mysql (year 2038 problem)
	676	*
3d231c	677	* @param string $field Field name
0d94fd	678	*
AM	679	* @return string SQL statement to use in query
	680	* @deprecated
	681	*/
	682	public function unixtimestamp($field)
	683	{
	684	return "UNIX_TIMESTAMP($field)";
	685	}
	686
	687	/**
	688	* Return SQL statement to convert from a unix timestamp
	689	*
3d231c	690	* @param int $timestamp Unix timestamp
0d94fd	691	*
3d231c	692	* @return string Date string in db-specific format
0d94fd	693	*/
AM	694	public function fromunixtime($timestamp)
	695	{
	696	return date("'Y-m-d H:i:s'", $timestamp);
	697	}
	698
	699	/**
	700	* Return SQL statement for case insensitive LIKE
	701	*
3d231c	702	* @param string $column Field name
AM	703	* @param string $value Search value
0d94fd	704	*
3d231c	705	* @return string SQL statement to use in query
0d94fd	706	*/
AM	707	public function ilike($column, $value)
	708	{
	709	return $this->quote_identifier($column).' LIKE '.$this->quote($value);
	710	}
	711
	712	/**
	713	* Abstract SQL statement for value concatenation
	714	*
	715	* @return string SQL statement to be used in query
	716	*/
	717	public function concat(/* col1, col2, ... */)
	718	{
	719	$args = func_get_args();
	720	if (is_array($args[0])) {
	721	$args = $args[0];
	722	}
	723
	724	return '(' . join(' \|\| ', $args) . ')';
	725	}
	726
	727	/**
	728	* Encodes non-UTF-8 characters in string/array/object (recursive)
	729	*
3d231c	730	* @param mixed $input Data to fix
0d94fd	731	*
3d231c	732	* @return mixed Properly UTF-8 encoded data
0d94fd	733	*/
AM	734	public static function encode($input)
	735	{
	736	if (is_object($input)) {
	737	foreach (get_object_vars($input) as $idx => $value) {
	738	$input->$idx = self::encode($value);
	739	}
	740	return $input;
	741	}
	742	else if (is_array($input)) {
	743	foreach ($input as $idx => $value) {
	744	$input[$idx] = self::encode($value);
	745	}
	746	return $input;
	747	}
	748
	749	return utf8_encode($input);
	750	}
	751
	752	/**
	753	* Decodes encoded UTF-8 string/object/array (recursive)
	754	*
3d231c	755	* @param mixed $input Input data
0d94fd	756	*
3d231c	757	* @return mixed Decoded data
0d94fd	758	*/
AM	759	public static function decode($input)
	760	{
	761	if (is_object($input)) {
	762	foreach (get_object_vars($input) as $idx => $value) {
	763	$input->$idx = self::decode($value);
	764	}
	765	return $input;
	766	}
	767	else if (is_array($input)) {
	768	foreach ($input as $idx => $value) {
	769	$input[$idx] = self::decode($value);
	770	}
	771	return $input;
	772	}
	773
	774	return utf8_decode($input);
	775	}
	776
	777	/**
	778	* Return correct name for a specific database table
	779	*
	780	* @param string $table Table name
	781	*
	782	* @return string Translated table name
	783	*/
	784	public function table_name($table)
	785	{
	786	$rcube = rcube::get_instance();
	787
	788	// return table name if configured
	789	$config_key = 'db_table_'.$table;
	790
	791	if ($name = $rcube->config->get($config_key)) {
	792	return $name;
	793	}
	794
	795	return $table;
	796	}
	797
	798	/**
	799	* MDB2 DSN string parser
3e386e	800	*
AM	801	* @param string $sequence Secuence name
	802	*
	803	* @return array DSN parameters
0d94fd	804	*/
AM	805	public static function parse_dsn($dsn)
	806	{
	807	if (empty($dsn)) {
	808	return null;
	809	}
	810
	811	// Find phptype and dbsyntax
	812	if (($pos = strpos($dsn, '://')) !== false) {
	813	$str = substr($dsn, 0, $pos);
	814	$dsn = substr($dsn, $pos + 3);
3d231c	815	}
AM	816	else {
0d94fd	817	$str = $dsn;
AM	818	$dsn = null;
	819	}
	820
	821	// Get phptype and dbsyntax
	822	// $str => phptype(dbsyntax)
	823	if (preg_match('\|^(.+?)$(.*?)$$\|', $str, $arr)) {
	824	$parsed['phptype'] = $arr[1];
	825	$parsed['dbsyntax'] = !$arr[2] ? $arr[1] : $arr[2];
3d231c	826	}
AM	827	else {
0d94fd	828	$parsed['phptype'] = $str;
AM	829	$parsed['dbsyntax'] = $str;
	830	}
	831
	832	if (empty($dsn)) {
	833	return $parsed;
	834	}
	835
	836	// Get (if found): username and password
	837	// $dsn => username:password@protocol+hostspec/database
	838	if (($at = strrpos($dsn,'@')) !== false) {
	839	$str = substr($dsn, 0, $at);
	840	$dsn = substr($dsn, $at + 1);
	841	if (($pos = strpos($str, ':')) !== false) {
	842	$parsed['username'] = rawurldecode(substr($str, 0, $pos));
	843	$parsed['password'] = rawurldecode(substr($str, $pos + 1));
3d231c	844	}
AM	845	else {
0d94fd	846	$parsed['username'] = rawurldecode($str);
AM	847	}
	848	}
	849
	850	// Find protocol and hostspec
	851
	852	// $dsn => proto(proto_opts)/database
	853	if (preg_match('\|^([^(]+)$(.?)$/?(.?)$\|', $dsn, $match)) {
	854	$proto = $match[1];
	855	$proto_opts = $match[2] ? $match[2] : false;
	856	$dsn = $match[3];
	857	}
	858	// $dsn => protocol+hostspec/database (old format)
	859	else {
	860	if (strpos($dsn, '+') !== false) {
	861	list($proto, $dsn) = explode('+', $dsn, 2);
	862	}
	863	if ( strpos($dsn, '//') === 0
	864	&& strpos($dsn, '/', 2) !== false
	865	&& $parsed['phptype'] == 'oci8'
	866	) {
	867	//oracle's "Easy Connect" syntax:
	868	//"username/password@[//]host[:port][/service_name]"
	869	//e.g. "scott/tiger@//mymachine:1521/oracle"
	870	$proto_opts = $dsn;
	871	$pos = strrpos($proto_opts, '/');
	872	$dsn = substr($proto_opts, $pos + 1);
	873	$proto_opts = substr($proto_opts, 0, $pos);
3d231c	874	}
AM	875	else if (strpos($dsn, '/') !== false) {
0d94fd	876	list($proto_opts, $dsn) = explode('/', $dsn, 2);
3d231c	877	}
AM	878	else {
0d94fd	879	$proto_opts = $dsn;
AM	880	$dsn = null;
	881	}
	882	}
	883
	884	// process the different protocol options
	885	$parsed['protocol'] = (!empty($proto)) ? $proto : 'tcp';
	886	$proto_opts = rawurldecode($proto_opts);
	887	if (strpos($proto_opts, ':') !== false) {
	888	list($proto_opts, $parsed['port']) = explode(':', $proto_opts);
	889	}
	890	if ($parsed['protocol'] == 'tcp') {
	891	$parsed['hostspec'] = $proto_opts;
	892	}
	893	else if ($parsed['protocol'] == 'unix') {
	894	$parsed['socket'] = $proto_opts;
	895	}
	896
	897	// Get dabase if any
	898	// $dsn => database
	899	if ($dsn) {
	900	// /database
	901	if (($pos = strpos($dsn, '?')) === false) {
	902	$parsed['database'] = rawurldecode($dsn);
	903	// /database?param1=value1&param2=value2
	904	}
	905	else {
	906	$parsed['database'] = rawurldecode(substr($dsn, 0, $pos));
	907	$dsn = substr($dsn, $pos + 1);
	908	if (strpos($dsn, '&') !== false) {
	909	$opts = explode('&', $dsn);
3d231c	910	}
AM	911	else { // database?param1=value1
0d94fd	912	$opts = array($dsn);
AM	913	}
	914	foreach ($opts as $opt) {
	915	list($key, $value) = explode('=', $opt);
	916	if (!array_key_exists($key, $parsed) \|\| false === $parsed[$key]) {
	917	// don't allow params overwrite
	918	$parsed[$key] = rawurldecode($value);
	919	}
	920	}
	921	}
	922	}
	923
	924	return $parsed;
	925	}
	926
	927	/**
3e386e	928	* Returns PDO DSN string from DSN array
AM	929	*
3d231c	930	* @param array $dsn DSN parameters
3e386e	931	*
AM	932	* @return string DSN string
0d94fd	933	*/
AM	934	protected function dsn_string($dsn)
	935	{
	936	$params = array();
	937	$result = $dsn['phptype'] . ':';
	938
	939	if ($dsn['hostspec']) {
	940	$params[] = 'host=' . $dsn['hostspec'];
	941	}
	942
	943	if ($dsn['port']) {
	944	$params[] = 'port=' . $dsn['port'];
	945	}
	946
	947	if ($dsn['database']) {
	948	$params[] = 'dbname=' . $dsn['database'];
	949	}
	950
	951	if (!empty($params)) {
	952	$result .= implode(';', $params);
	953	}
	954
	955	return $result;
	956	}
	957
	958	/**
3e386e	959	* Returns driver-specific connection options
AM	960	*
3d231c	961	* @param array $dsn DSN parameters
3e386e	962	*
AM	963	* @return array Connection options
0d94fd	964	*/
AM	965	protected function dsn_options($dsn)
	966	{
	967	$result = array();
	968
	969	return $result;
	970	}
	971	}