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811 lines
23 KiB
PHP
811 lines
23 KiB
PHP
<?php
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/*
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+-----------------------------------------------------------------------+
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| program/include/rcube_mdb2.php |
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| |
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 2005-2009, The Roundcube Dev Team |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| |
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| PURPOSE: |
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| PEAR:DB wrapper class that implements PEAR MDB2 functions |
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| See http://pear.php.net/package/MDB2 |
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+-----------------------------------------------------------------------+
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| Author: Lukas Kahwe Smith <smith@pooteeweet.org> |
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+-----------------------------------------------------------------------+
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$Id$
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*/
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/**
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* Database independent query interface
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*
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* This is a wrapper for the PEAR::MDB2 class
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*
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* @package Database
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* @author David Saez Padros <david@ols.es>
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* @author Thomas Bruederli <roundcube@gmail.com>
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* @author Lukas Kahwe Smith <smith@pooteeweet.org>
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* @version 1.18
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* @link http://pear.php.net/package/MDB2
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*/
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class rcube_mdb2
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{
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public $db_dsnw; // DSN for write operations
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public $db_dsnr; // DSN for read operations
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public $db_connected = false; // Already connected ?
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public $db_mode = ''; // Connection mode
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public $db_handle = 0; // Connection handle
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public $db_error = false;
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public $db_error_msg = '';
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private $debug_mode = false;
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private $conn_failure = false;
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private $a_query_results = array('dummy');
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private $last_res_id = 0;
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private $tables;
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/**
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* Object constructor
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*
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* @param string $db_dsnw DSN for read/write operations
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* @param string $db_dsnr Optional DSN for read only operations
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*/
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function __construct($db_dsnw, $db_dsnr='', $pconn=false)
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{
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if (empty($db_dsnr))
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$db_dsnr = $db_dsnw;
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$this->db_dsnw = $db_dsnw;
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$this->db_dsnr = $db_dsnr;
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$this->db_pconn = $pconn;
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$dsn_array = MDB2::parseDSN($db_dsnw);
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$this->db_provider = $dsn_array['phptype'];
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}
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/**
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* Connect to specific database
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*
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* @param string $dsn DSN for DB connections
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* @return MDB2 PEAR database handle
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* @access private
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*/
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private function dsn_connect($dsn)
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{
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// Use persistent connections if available
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$db_options = array(
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'persistent' => $this->db_pconn,
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'emulate_prepared' => $this->debug_mode,
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'debug' => $this->debug_mode,
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'debug_handler' => array($this, 'debug_handler'),
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'portability' => MDB2_PORTABILITY_ALL ^ MDB2_PORTABILITY_EMPTY_TO_NULL);
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if ($this->db_provider == 'pgsql') {
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$db_options['disable_smart_seqname'] = true;
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$db_options['seqname_format'] = '%s';
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}
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$this->db_error = false;
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$this->db_error_msg = null;
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$dbh = MDB2::connect($dsn, $db_options);
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if (MDB2::isError($dbh)) {
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$this->db_error = true;
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$this->db_error_msg = $dbh->getMessage();
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raise_error(array('code' => 500, 'type' => 'db',
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'line' => __LINE__, 'file' => __FILE__,
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'message' => $dbh->getUserInfo()), true, false);
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}
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else if ($this->db_provider == 'sqlite') {
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$dsn_array = MDB2::parseDSN($dsn);
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if (!filesize($dsn_array['database']) && !empty($this->sqlite_initials))
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$this->_sqlite_create_database($dbh, $this->sqlite_initials);
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}
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else if ($this->db_provider!='mssql' && $this->db_provider!='sqlsrv')
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$dbh->setCharset('utf8');
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return $dbh;
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}
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/**
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* Connect to appropiate database depending on the operation
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*
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* @param string $mode Connection mode (r|w)
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* @access public
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*/
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function db_connect($mode)
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{
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// previous connection failed, don't attempt to connect again
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if ($this->conn_failure) {
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return;
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}
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// no replication
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if ($this->db_dsnw == $this->db_dsnr) {
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$mode = 'w';
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}
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// Already connected
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if ($this->db_connected) {
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// connected to db with the same or "higher" mode
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if ($this->db_mode == 'w' || $this->db_mode == $mode) {
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return;
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}
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}
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$dsn = ($mode == 'r') ? $this->db_dsnr : $this->db_dsnw;
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$this->db_handle = $this->dsn_connect($dsn);
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$this->db_connected = !PEAR::isError($this->db_handle);
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// use write-master when read-only fails
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if (!$this->db_connected && $mode == 'r') {
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$mode = 'w';
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$this->db_handle = $this->dsn_connect($this->db_dsnw);
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$this->db_connected = !PEAR::isError($this->db_handle);
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}
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if ($this->db_connected)
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$this->db_mode = $mode;
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else
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$this->conn_failure = true;
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}
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/**
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* Activate/deactivate debug mode
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*
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* @param boolean $dbg True if SQL queries should be logged
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* @access public
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*/
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function set_debug($dbg = true)
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{
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$this->debug_mode = $dbg;
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if ($this->db_connected) {
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$this->db_handle->setOption('debug', $dbg);
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$this->db_handle->setOption('emulate_prepared', $dbg);
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}
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}
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/**
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* Getter for error state
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*
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* @param boolean True on error
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* @access public
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*/
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function is_error()
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{
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return $this->db_error ? $this->db_error_msg : false;
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}
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/**
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* Connection state checker
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*
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* @param boolean True if in connected state
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* @access public
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*/
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function is_connected()
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{
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return PEAR::isError($this->db_handle) ? false : $this->db_connected;
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}
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/**
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* Is database replication configured?
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* This returns true if dsnw != dsnr
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*/
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function is_replicated()
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{
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return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
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}
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/**
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* Execute a SQL query
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*
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* @param string SQL query to execute
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* @param mixed Values to be inserted in query
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* @return number Query handle identifier
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* @access public
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*/
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function query()
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{
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$params = func_get_args();
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$query = array_shift($params);
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// Support one argument of type array, instead of n arguments
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if (count($params) == 1 && is_array($params[0]))
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$params = $params[0];
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return $this->_query($query, 0, 0, $params);
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}
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/**
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* Execute a SQL query with limits
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*
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* @param string SQL query to execute
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* @param number Offset for LIMIT statement
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* @param number Number of rows for LIMIT statement
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* @param mixed Values to be inserted in query
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* @return number Query handle identifier
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* @access public
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*/
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function limitquery()
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{
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$params = func_get_args();
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$query = array_shift($params);
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$offset = array_shift($params);
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$numrows = array_shift($params);
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return $this->_query($query, $offset, $numrows, $params);
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}
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/**
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* Execute a SQL query with limits
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*
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* @param string $query SQL query to execute
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* @param number $offset Offset for LIMIT statement
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* @param number $numrows Number of rows for LIMIT statement
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* @param array $params Values to be inserted in query
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* @return number Query handle identifier
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* @access private
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*/
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private function _query($query, $offset, $numrows, $params)
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{
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// Read or write ?
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$mode = (strtolower(substr(trim($query),0,6)) == 'select') ? 'r' : 'w';
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$this->db_connect($mode);
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// check connection before proceeding
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if (!$this->is_connected())
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return null;
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if ($this->db_provider == 'sqlite')
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$this->_sqlite_prepare();
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if ($numrows || $offset)
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$result = $this->db_handle->setLimit($numrows,$offset);
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if (empty($params))
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$result = $mode == 'r' ? $this->db_handle->query($query) : $this->db_handle->exec($query);
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else {
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$params = (array)$params;
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$q = $this->db_handle->prepare($query, null, $mode=='w' ? MDB2_PREPARE_MANIP : null);
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if ($this->db_handle->isError($q)) {
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$this->db_error = true;
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$this->db_error_msg = $q->userinfo;
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raise_error(array('code' => 500, 'type' => 'db',
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'line' => __LINE__, 'file' => __FILE__,
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'message' => $this->db_error_msg), true, false);
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$result = false;
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}
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else {
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$result = $q->execute($params);
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$q->free();
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}
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}
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// add result, even if it's an error
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return $this->_add_result($result);
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}
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/**
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* Get number of rows for a SQL query
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* If no query handle is specified, the last query will be taken as reference
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*
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* @param number $res_id Optional query handle identifier
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* @return mixed Number of rows or false on failure
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* @access public
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*/
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function num_rows($res_id=null)
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{
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if (!$this->db_connected)
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return false;
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if ($result = $this->_get_result($res_id))
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return $result->numRows();
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else
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return false;
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}
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/**
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* Get number of affected rows for the last query
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*
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* @param number $res_id Optional query handle identifier
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* @return mixed Number of rows or false on failure
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* @access public
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*/
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function affected_rows($res_id = null)
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{
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if (!$this->db_connected)
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return false;
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return $this->_get_result($res_id);
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}
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/**
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* Get last inserted record ID
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* For Postgres databases, a sequence name is required
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*
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* @param string $table Table name (to find the incremented sequence)
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* @return mixed ID or false on failure
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* @access public
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*/
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function insert_id($table = '')
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{
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if (!$this->db_connected || $this->db_mode == 'r')
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return false;
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if ($table) {
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if ($this->db_provider == 'pgsql')
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// find sequence name
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$table = get_sequence_name($table);
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else
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// resolve table name
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$table = get_table_name($table);
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}
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$id = $this->db_handle->lastInsertID($table);
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return $this->db_handle->isError($id) ? null : $id;
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}
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/**
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* Get an associative array for one row
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* If no query handle is specified, the last query will be taken as reference
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*
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* @param number $res_id Optional query handle identifier
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* @return mixed Array with col values or false on failure
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* @access public
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*/
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function fetch_assoc($res_id=null)
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{
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$result = $this->_get_result($res_id);
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return $this->_fetch_row($result, MDB2_FETCHMODE_ASSOC);
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}
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/**
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* Get an index array for one row
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* If no query handle is specified, the last query will be taken as reference
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*
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* @param number $res_id Optional query handle identifier
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* @return mixed Array with col values or false on failure
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* @access public
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*/
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function fetch_array($res_id=null)
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{
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$result = $this->_get_result($res_id);
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return $this->_fetch_row($result, MDB2_FETCHMODE_ORDERED);
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}
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/**
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* Get col values for a result row
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*
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* @param MDB2_Result_Common Query $result result handle
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* @param number $mode Fetch mode identifier
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* @return mixed Array with col values or false on failure
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* @access private
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*/
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private function _fetch_row($result, $mode)
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{
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if ($result === false || PEAR::isError($result) || !$this->is_connected())
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return false;
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return $result->fetchRow($mode);
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}
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/**
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* Wrapper for the SHOW TABLES command
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*
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* @return array List of all tables of the current database
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* @access public
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* @since 0.4-beta
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*/
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function list_tables()
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{
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// get tables if not cached
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if (!$this->tables) {
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$this->db_handle->loadModule('Manager');
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if (!PEAR::isError($result = $this->db_handle->listTables()))
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$this->tables = $result;
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else
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$this->tables = array();
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}
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return $this->tables;
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}
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|
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/**
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* Wrapper for SHOW COLUMNS command
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*
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* @param string Table name
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* @return array List of table cols
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*/
|
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function list_cols($table)
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{
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$this->db_handle->loadModule('Manager');
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if (!PEAR::isError($result = $this->db_handle->listTableFields($table))) {
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return $result;
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}
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return null;
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}
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|
|
|
|
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/**
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* Formats input so it can be safely used in a query
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|
*
|
|
* @param mixed $input Value to quote
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* @param string $type Type of data
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* @return string Quoted/converted string for use in query
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* @access public
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|
*/
|
|
function quote($input, $type = null)
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{
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// handle int directly for better performance
|
|
if ($type == 'integer')
|
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return intval($input);
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|
|
|
// create DB handle if not available
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if (!$this->db_handle)
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$this->db_connect('r');
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return $this->db_connected ? $this->db_handle->quote($input, $type) : addslashes($input);
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}
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|
|
|
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/**
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* Quotes a string so it can be safely used as a table or column name
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*
|
|
* @param string $str Value to quote
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|
* @return string Quoted string for use in query
|
|
* @deprecated Replaced by rcube_MDB2::quote_identifier
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|
* @see rcube_mdb2::quote_identifier
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* @access public
|
|
*/
|
|
function quoteIdentifier($str)
|
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{
|
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return $this->quote_identifier($str);
|
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}
|
|
|
|
|
|
/**
|
|
* Quotes a string so it can be safely used as a table or column name
|
|
*
|
|
* @param string $str Value to quote
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|
* @return string Quoted string for use in query
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* @access public
|
|
*/
|
|
function quote_identifier($str)
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{
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if (!$this->db_handle)
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$this->db_connect('r');
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|
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return $this->db_connected ? $this->db_handle->quoteIdentifier($str) : $str;
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}
|
|
|
|
|
|
/**
|
|
* Escapes a string
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|
*
|
|
* @param string $str The string to be escaped
|
|
* @return string The escaped string
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|
* @access public
|
|
* @since 0.1.1
|
|
*/
|
|
function escapeSimple($str)
|
|
{
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if (!$this->db_handle)
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$this->db_connect('r');
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|
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return $this->db_handle->escape($str);
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|
}
|
|
|
|
|
|
/**
|
|
* Return SQL function for current time and date
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|
*
|
|
* @return string SQL function to use in query
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|
* @access public
|
|
*/
|
|
function now()
|
|
{
|
|
switch ($this->db_provider) {
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|
case 'mssql':
|
|
case 'sqlsrv':
|
|
return "getdate()";
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|
|
|
default:
|
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return "now()";
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Return list of elements for use with SQL's IN clause
|
|
*
|
|
* @param array $arr Input array
|
|
* @param string $type Type of data
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|
* @return string Comma-separated list of quoted values for use in query
|
|
* @access public
|
|
*/
|
|
function array2list($arr, $type = null)
|
|
{
|
|
if (!is_array($arr))
|
|
return $this->quote($arr, $type);
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|
|
|
foreach ($arr as $idx => $item)
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$arr[$idx] = $this->quote($item, $type);
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|
|
return implode(',', $arr);
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|
}
|
|
|
|
|
|
/**
|
|
* Return SQL statement to convert a field value into a unix timestamp
|
|
*
|
|
* This method is deprecated and should not be used anymore due to limitations
|
|
* of timestamp functions in Mysql (year 2038 problem)
|
|
*
|
|
* @param string $field Field name
|
|
* @return string SQL statement to use in query
|
|
* @deprecated
|
|
*/
|
|
function unixtimestamp($field)
|
|
{
|
|
switch($this->db_provider) {
|
|
case 'pgsql':
|
|
return "EXTRACT (EPOCH FROM $field)";
|
|
|
|
case 'mssql':
|
|
case 'sqlsrv':
|
|
return "DATEDIFF(second, '19700101', $field) + DATEDIFF(second, GETDATE(), GETUTCDATE())";
|
|
|
|
default:
|
|
return "UNIX_TIMESTAMP($field)";
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Return SQL statement to convert from a unix timestamp
|
|
*
|
|
* @param string $timestamp Field name
|
|
* @return string SQL statement to use in query
|
|
* @access public
|
|
*/
|
|
function fromunixtime($timestamp)
|
|
{
|
|
return date("'Y-m-d H:i:s'", $timestamp);
|
|
}
|
|
|
|
|
|
/**
|
|
* Return SQL statement for case insensitive LIKE
|
|
*
|
|
* @param string $column Field name
|
|
* @param string $value Search value
|
|
* @return string SQL statement to use in query
|
|
* @access public
|
|
*/
|
|
function ilike($column, $value)
|
|
{
|
|
// TODO: use MDB2's matchPattern() function
|
|
switch($this->db_provider) {
|
|
case 'pgsql':
|
|
return $this->quote_identifier($column).' ILIKE '.$this->quote($value);
|
|
default:
|
|
return $this->quote_identifier($column).' LIKE '.$this->quote($value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Abstract SQL statement for value concatenation
|
|
*
|
|
* @return string SQL statement to be used in query
|
|
* @access public
|
|
*/
|
|
function concat(/* col1, col2, ... */)
|
|
{
|
|
$func = '';
|
|
$args = func_get_args();
|
|
|
|
switch($this->db_provider) {
|
|
case 'mysql':
|
|
case 'mysqli':
|
|
$func = 'CONCAT';
|
|
$delim = ', ';
|
|
break;
|
|
case 'mssql':
|
|
case 'sqlsrv':
|
|
$delim = ' + ';
|
|
break;
|
|
default:
|
|
$delim = ' || ';
|
|
}
|
|
|
|
return $func . '(' . join($delim, $args) . ')';
|
|
}
|
|
|
|
|
|
/**
|
|
* Encodes non-UTF-8 characters in string/array/object (recursive)
|
|
*
|
|
* @param mixed $input Data to fix
|
|
* @return mixed Properly UTF-8 encoded data
|
|
* @access public
|
|
*/
|
|
function encode($input)
|
|
{
|
|
if (is_object($input)) {
|
|
foreach (get_object_vars($input) as $idx => $value)
|
|
$input->$idx = $this->encode($value);
|
|
return $input;
|
|
}
|
|
else if (is_array($input)) {
|
|
foreach ($input as $idx => $value)
|
|
$input[$idx] = $this->encode($value);
|
|
return $input;
|
|
}
|
|
|
|
return utf8_encode($input);
|
|
}
|
|
|
|
|
|
/**
|
|
* Decodes encoded UTF-8 string/object/array (recursive)
|
|
*
|
|
* @param mixed $input Input data
|
|
* @return mixed Decoded data
|
|
* @access public
|
|
*/
|
|
function decode($input)
|
|
{
|
|
if (is_object($input)) {
|
|
foreach (get_object_vars($input) as $idx => $value)
|
|
$input->$idx = $this->decode($value);
|
|
return $input;
|
|
}
|
|
else if (is_array($input)) {
|
|
foreach ($input as $idx => $value)
|
|
$input[$idx] = $this->decode($value);
|
|
return $input;
|
|
}
|
|
|
|
return utf8_decode($input);
|
|
}
|
|
|
|
|
|
/**
|
|
* Adds a query result and returns a handle ID
|
|
*
|
|
* @param object $res Query handle
|
|
* @return mixed Handle ID
|
|
* @access private
|
|
*/
|
|
private function _add_result($res)
|
|
{
|
|
// sql error occured
|
|
if (PEAR::isError($res)) {
|
|
$this->db_error = true;
|
|
$this->db_error_msg = $res->getMessage();
|
|
raise_error(array('code' => 500, 'type' => 'db',
|
|
'line' => __LINE__, 'file' => __FILE__,
|
|
'message' => $res->getMessage() . " Query: "
|
|
. substr(preg_replace('/[\r\n]+\s*/', ' ', $res->userinfo), 0, 512)),
|
|
true, false);
|
|
}
|
|
|
|
$res_id = sizeof($this->a_query_results);
|
|
$this->last_res_id = $res_id;
|
|
$this->a_query_results[$res_id] = $res;
|
|
return $res_id;
|
|
}
|
|
|
|
|
|
/**
|
|
* Resolves a given handle ID and returns the according query handle
|
|
* If no ID is specified, the last resource handle will be returned
|
|
*
|
|
* @param number $res_id Handle ID
|
|
* @return mixed Resource handle or false on failure
|
|
* @access private
|
|
*/
|
|
private function _get_result($res_id = null)
|
|
{
|
|
if ($res_id == null)
|
|
$res_id = $this->last_res_id;
|
|
|
|
if (isset($this->a_query_results[$res_id]))
|
|
if (!PEAR::isError($this->a_query_results[$res_id]))
|
|
return $this->a_query_results[$res_id];
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a sqlite database from a file
|
|
*
|
|
* @param MDB2 $dbh SQLite database handle
|
|
* @param string $file_name File path to use for DB creation
|
|
* @access private
|
|
*/
|
|
private function _sqlite_create_database($dbh, $file_name)
|
|
{
|
|
if (empty($file_name) || !is_string($file_name))
|
|
return;
|
|
|
|
$data = file_get_contents($file_name);
|
|
|
|
if (strlen($data))
|
|
if (!sqlite_exec($dbh->connection, $data, $error) || MDB2::isError($dbh))
|
|
raise_error(array('code' => 500, 'type' => 'db',
|
|
'line' => __LINE__, 'file' => __FILE__,
|
|
'message' => $error), true, false);
|
|
}
|
|
|
|
|
|
/**
|
|
* Add some proprietary database functions to the current SQLite handle
|
|
* in order to make it MySQL compatible
|
|
*
|
|
* @access private
|
|
*/
|
|
private function _sqlite_prepare()
|
|
{
|
|
include_once(INSTALL_PATH . 'program/include/rcube_sqlite.inc');
|
|
|
|
// we emulate via callback some missing MySQL function
|
|
sqlite_create_function($this->db_handle->connection,
|
|
'from_unixtime', 'rcube_sqlite_from_unixtime');
|
|
sqlite_create_function($this->db_handle->connection,
|
|
'unix_timestamp', 'rcube_sqlite_unix_timestamp');
|
|
sqlite_create_function($this->db_handle->connection,
|
|
'now', 'rcube_sqlite_now');
|
|
sqlite_create_function($this->db_handle->connection,
|
|
'md5', 'rcube_sqlite_md5');
|
|
}
|
|
|
|
|
|
/**
|
|
* Debug handler for the MDB2
|
|
*/
|
|
function debug_handler(&$db, $scope, $message, $context = array())
|
|
{
|
|
if ($scope != 'prepare') {
|
|
$debug_output = sprintf('%s(%d): %s;',
|
|
$scope, $db->db_index, rtrim($message, ';'));
|
|
write_log('sql', $debug_output);
|
|
}
|
|
}
|
|
|
|
} // end class rcube_db
|