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1402 lines
40 KiB
PHP
1402 lines
40 KiB
PHP
<?php
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/**
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) 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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| PURPOSE: |
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| Database wrapper class that implements PHP PDO functions |
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+-----------------------------------------------------------------------+
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| Author: Aleksander Machniak <alec@alec.pl> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Database independent query interface.
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* This is a wrapper for the PHP PDO.
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*
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* @package Framework
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* @subpackage Database
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*/
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class rcube_db
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{
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public $db_provider;
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protected $db_dsnw; // DSN for write operations
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protected $db_dsnr; // DSN for read operations
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protected $db_connected = false; // Already connected ?
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protected $db_mode; // Connection mode
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protected $dbh; // Connection handle
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protected $dbhs = array();
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protected $table_connections = array();
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protected $db_error = false;
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protected $db_error_msg = '';
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protected $conn_failure = false;
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protected $db_index = 0;
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protected $last_result;
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protected $tables;
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protected $variables;
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protected $options = array(
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// column/table quotes
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'identifier_start' => '"',
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'identifier_end' => '"',
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// date/time input format
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'datetime_format' => 'Y-m-d H:i:s',
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);
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const DEBUG_LINE_LENGTH = 4096;
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const DEFAULT_QUOTE = '`';
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/**
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* Factory, returns driver-specific instance of the class
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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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* @param bool $pconn Enables persistent connections
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*
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* @return rcube_db Object instance
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*/
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public static function factory($db_dsnw, $db_dsnr = '', $pconn = false)
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{
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$driver = strtolower(substr($db_dsnw, 0, strpos($db_dsnw, ':')));
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$driver_map = array(
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'sqlite2' => 'sqlite',
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'sybase' => 'mssql',
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'dblib' => 'mssql',
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'mysqli' => 'mysql',
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'oci' => 'oracle',
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'oci8' => 'oracle',
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);
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$driver = isset($driver_map[$driver]) ? $driver_map[$driver] : $driver;
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$class = "rcube_db_$driver";
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if (!$driver || !class_exists($class)) {
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rcube::raise_error(array('code' => 600, 'type' => 'db',
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'line' => __LINE__, 'file' => __FILE__,
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'message' => "Configuration error. Unsupported database driver: $driver"),
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true, true);
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}
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return new $class($db_dsnw, $db_dsnr, $pconn);
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}
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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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* @param bool $pconn Enables persistent connections
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*/
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public function __construct($db_dsnw, $db_dsnr = '', $pconn = false)
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{
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if (empty($db_dsnr)) {
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$db_dsnr = $db_dsnw;
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}
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$this->db_dsnw = $db_dsnw;
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$this->db_dsnr = $db_dsnr;
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$this->db_pconn = $pconn;
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$this->db_dsnw_array = self::parse_dsn($db_dsnw);
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$this->db_dsnr_array = self::parse_dsn($db_dsnr);
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$config = rcube::get_instance()->config;
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$this->options['table_prefix'] = $config->get('db_prefix');
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$this->options['dsnw_noread'] = $config->get('db_dsnw_noread', false);
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$this->options['table_dsn_map'] = array_map(array($this, 'table_name'), $config->get('db_table_dsn', array()));
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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 array $dsn DSN for DB connections
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* @param string $mode Connection mode (r|w)
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*/
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protected function dsn_connect($dsn, $mode)
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{
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$this->db_error = false;
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$this->db_error_msg = null;
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// return existing handle
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if ($this->dbhs[$mode]) {
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$this->dbh = $this->dbhs[$mode];
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$this->db_mode = $mode;
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return $this->dbh;
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}
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// connect to database
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if ($dbh = $this->conn_create($dsn)) {
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$this->dbhs[$mode] = $dbh;
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$this->db_mode = $mode;
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$this->db_connected = true;
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}
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}
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/**
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* Create PDO connection
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*/
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protected function conn_create($dsn)
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{
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// Get database specific connection options
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$dsn_string = $this->dsn_string($dsn);
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$dsn_options = $this->dsn_options($dsn);
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// Connect
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try {
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// with this check we skip fatal error on PDO object creation
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if (!class_exists('PDO', false)) {
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throw new Exception('PDO extension not loaded. See http://php.net/manual/en/intro.pdo.php');
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}
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$this->conn_prepare($dsn);
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$this->dbh = new PDO($dsn_string, $dsn['username'], $dsn['password'], $dsn_options);
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// don't throw exceptions or warnings
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$this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT);
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$this->conn_configure($dsn, $this->dbh);
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}
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catch (Exception $e) {
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$this->db_error = true;
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$this->db_error_msg = $e->getMessage();
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rcube::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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return null;
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}
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return $this->dbh;
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}
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/**
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* Driver-specific preparation of database connection
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*
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* @param array $dsn DSN for DB connections
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*/
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protected function conn_prepare($dsn)
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{
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}
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/**
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* Driver-specific configuration of database connection
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*
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* @param array $dsn DSN for DB connections
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* @param PDO $dbh Connection handler
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*/
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protected function conn_configure($dsn, $dbh)
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{
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}
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/**
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* Connect to appropriate database depending on the operation
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*
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* @param string $mode Connection mode (r|w)
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* @param boolean $force Enforce using the given mode
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*/
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public function db_connect($mode, $force = false)
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{
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// previous connection failed, don't attempt to connect again
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if ($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 ($this->db_connected) {
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// connected to db with the same or "higher" mode (if allowed)
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if ($this->db_mode == $mode || $this->db_mode == 'w' && !$force && !$this->options['dsnw_noread']) {
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return;
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}
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}
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$dsn = ($mode == 'r') ? $this->db_dsnr_array : $this->db_dsnw_array;
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$this->dsn_connect($dsn, $mode);
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// use write-master when read-only fails
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if (!$this->db_connected && $mode == 'r' && $this->is_replicated()) {
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$this->dsn_connect($this->db_dsnw_array, 'w');
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}
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$this->conn_failure = !$this->db_connected;
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}
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/**
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* Analyze the given SQL statement and select the appropriate connection to use
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*/
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protected function dsn_select($query)
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{
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// no replication
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if ($this->db_dsnw == $this->db_dsnr) {
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return 'w';
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}
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// Read or write ?
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$mode = preg_match('/^(select|show|set)/i', $query) ? 'r' : 'w';
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$start = '[' . $this->options['identifier_start'] . self::DEFAULT_QUOTE . ']';
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$end = '[' . $this->options['identifier_end'] . self::DEFAULT_QUOTE . ']';
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$regex = '/(?:^|\s)(from|update|into|join)\s+'.$start.'?([a-z0-9._]+)'.$end.'?\s+/i';
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// find tables involved in this query
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if (preg_match_all($regex, $query, $matches, PREG_SET_ORDER)) {
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foreach ($matches as $m) {
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$table = $m[2];
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// always use direct mapping
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if ($this->options['table_dsn_map'][$table]) {
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$mode = $this->options['table_dsn_map'][$table];
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break; // primary table rules
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}
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else if ($mode == 'r') {
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// connected to db with the same or "higher" mode for this table
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$db_mode = $this->table_connections[$table];
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if ($db_mode == 'w' && !$this->options['dsnw_noread']) {
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$mode = $db_mode;
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}
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}
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}
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// remember mode chosen (for primary table)
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$table = $matches[0][2];
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$this->table_connections[$table] = $mode;
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}
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return $mode;
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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 $dbg True if SQL queries should be logged
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*/
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public function set_debug($dbg = true)
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{
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$this->options['debug_mode'] = $dbg;
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}
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/**
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* Writes debug information/query to 'sql' log file
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*
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* @param string $query SQL query
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*/
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protected function debug($query)
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{
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if ($this->options['debug_mode']) {
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if (($len = strlen($query)) > self::DEBUG_LINE_LENGTH) {
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$diff = $len - self::DEBUG_LINE_LENGTH;
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$query = substr($query, 0, self::DEBUG_LINE_LENGTH)
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. "... [truncated $diff bytes]";
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}
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rcube::write_log('sql', '[' . (++$this->db_index) . '] ' . $query . ';');
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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 mixed $result Optional query result
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*
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* @return string Error message
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*/
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public function is_error($result = null)
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{
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if ($result !== null) {
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return $result === false ? $this->db_error_msg : null;
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}
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return $this->db_error ? $this->db_error_msg : null;
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}
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/**
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* Connection state checker
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*
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* @return boolean True if in connected state
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*/
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public function is_connected()
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{
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return !is_object($this->dbh) ? false : $this->db_connected;
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}
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/**
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* Is database replication configured?
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*
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* @return bool Returns true if dsnw != dsnr
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*/
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public function is_replicated()
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{
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return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
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}
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/**
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* Get database runtime variables
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*
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* @param string $varname Variable name
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* @param mixed $default Default value if variable is not set
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*
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* @return mixed Variable value or default
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*/
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public function get_variable($varname, $default = null)
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{
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// to be implemented by driver class
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return rcube::get_instance()->config->get('db_' . $varname, $default);
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}
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/**
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* Execute a SQL query
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*
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* @param string SQL query to execute
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* @param mixed Values to be inserted in query
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*
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* @return number Query handle identifier
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*/
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public function query()
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{
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$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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}
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return $this->_query($query, 0, 0, $params);
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}
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/**
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* Execute a SQL query with limits
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*
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* @param string SQL query to execute
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* @param int Offset for LIMIT statement
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* @param int Number of rows for LIMIT statement
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* @param mixed Values to be inserted in query
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*
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* @return PDOStatement|bool Query handle or False on error
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*/
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public function limitquery()
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{
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$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 int $offset Offset for LIMIT statement
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* @param int $numrows Number of rows for LIMIT statement
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* @param array $params Values to be inserted in query
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*
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* @return PDOStatement|bool Query handle or False on error
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*/
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protected function _query($query, $offset, $numrows, $params)
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{
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$query = ltrim($query);
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$this->db_connect($this->dsn_select($query), true);
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// check connection before proceeding
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if (!$this->is_connected()) {
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return $this->last_result = false;
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}
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if ($numrows || $offset) {
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$query = $this->set_limit($query, $numrows, $offset);
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}
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// replace self::DEFAULT_QUOTE with driver-specific quoting
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$query = $this->query_parse($query);
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// Because in Roundcube we mostly use queries that are
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// executed only once, we will not use prepared queries
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$pos = 0;
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$idx = 0;
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if (count($params)) {
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while ($pos = strpos($query, '?', $pos)) {
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if ($query[$pos+1] == '?') { // skip escaped '?'
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$pos += 2;
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}
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else {
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$val = $this->quote($params[$idx++]);
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unset($params[$idx-1]);
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$query = substr_replace($query, $val, $pos, 1);
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$pos += strlen($val);
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}
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}
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}
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$query = rtrim($query, " \t\n\r\0\x0B;");
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// replace escaped '?' and quotes back to normal, see self::quote()
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$query = str_replace(
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array('??', self::DEFAULT_QUOTE.self::DEFAULT_QUOTE),
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array('?', self::DEFAULT_QUOTE),
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$query
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);
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// log query
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$this->debug($query);
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return $this->query_execute($query);
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}
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|
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/**
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* Query execution
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*/
|
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protected function query_execute($query)
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{
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// destroy reference to previous result, required for SQLite driver (#1488874)
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$this->last_result = null;
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$this->db_error_msg = null;
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// send query
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$result = $this->dbh->query($query);
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if ($result === false) {
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$result = $this->handle_error($query);
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}
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return $this->last_result = $result;
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}
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|
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/**
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* Parse SQL query and replace identifier quoting
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*
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* @param string $query SQL query
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*
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* @return string SQL query
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*/
|
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protected function query_parse($query)
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{
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$start = $this->options['identifier_start'];
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$end = $this->options['identifier_end'];
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$quote = self::DEFAULT_QUOTE;
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if ($start == $quote) {
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return $query;
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}
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$pos = 0;
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$in = false;
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while ($pos = strpos($query, $quote, $pos)) {
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if ($query[$pos+1] == $quote) { // skip escaped quote
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$pos += 2;
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}
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else {
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if ($in) {
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$q = $end;
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$in = false;
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}
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else {
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$q = $start;
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$in = true;
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}
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$query = substr_replace($query, $q, $pos, 1);
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$pos++;
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}
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}
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return $query;
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}
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|
|
/**
|
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* Helper method to handle DB errors.
|
|
* This by default logs the error but could be overridden by a driver implementation
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*
|
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* @param string $query Query that triggered the error
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*
|
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* @return mixed Result to be stored and returned
|
|
*/
|
|
protected function handle_error($query)
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{
|
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$error = $this->dbh->errorInfo();
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|
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if (empty($this->options['ignore_key_errors']) || !in_array($error[0], array('23000', '23505'))) {
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$this->db_error = true;
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$this->db_error_msg = sprintf('[%s] %s', $error[1], $error[2]);
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|
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if (empty($this->options['ignore_errors'])) {
|
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rcube::raise_error(array(
|
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'code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
|
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'message' => $this->db_error_msg . " (SQL Query: $query)"
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|
), true, false);
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}
|
|
}
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return false;
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}
|
|
|
|
/**
|
|
* Get number of affected rows for the last query
|
|
*
|
|
* @param mixed $result Optional query handle
|
|
*
|
|
* @return int Number of (matching) rows
|
|
*/
|
|
public function affected_rows($result = null)
|
|
{
|
|
if ($result || ($result === null && ($result = $this->last_result))) {
|
|
if ($result !== true) {
|
|
return $result->rowCount();
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Get number of rows for a SQL query
|
|
* If no query handle is specified, the last query will be taken as reference
|
|
*
|
|
* @param mixed $result Optional query handle
|
|
*
|
|
* @return mixed Number of rows or false on failure
|
|
* @deprecated This method shows very poor performance and should be avoided.
|
|
*/
|
|
public function num_rows($result = null)
|
|
{
|
|
if (($result || ($result === null && ($result = $this->last_result))) && $result !== true) {
|
|
// repeat query with SELECT COUNT(*) ...
|
|
if (preg_match('/^SELECT\s+(?:ALL\s+|DISTINCT\s+)?(?:.*?)\s+FROM\s+(.*)$/ims', $result->queryString, $m)) {
|
|
$query = $this->dbh->query('SELECT COUNT(*) FROM ' . $m[1], PDO::FETCH_NUM);
|
|
return $query ? intval($query->fetchColumn(0)) : false;
|
|
}
|
|
else {
|
|
$num = count($result->fetchAll());
|
|
$result->execute(); // re-execute query because there's no seek(0)
|
|
return $num;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get last inserted record ID
|
|
*
|
|
* @param string $table Table name (to find the incremented sequence)
|
|
*
|
|
* @return mixed ID or false on failure
|
|
*/
|
|
public function insert_id($table = '')
|
|
{
|
|
if (!$this->db_connected || $this->db_mode == 'r') {
|
|
return false;
|
|
}
|
|
|
|
if ($table) {
|
|
// resolve table name
|
|
$table = $this->table_name($table);
|
|
}
|
|
|
|
$id = $this->dbh->lastInsertId($table);
|
|
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* Get an associative array for one row
|
|
* If no query handle is specified, the last query will be taken as reference
|
|
*
|
|
* @param mixed $result Optional query handle
|
|
*
|
|
* @return mixed Array with col values or false on failure
|
|
*/
|
|
public function fetch_assoc($result = null)
|
|
{
|
|
return $this->_fetch_row($result, PDO::FETCH_ASSOC);
|
|
}
|
|
|
|
/**
|
|
* Get an index array for one row
|
|
* If no query handle is specified, the last query will be taken as reference
|
|
*
|
|
* @param mixed $result Optional query handle
|
|
*
|
|
* @return mixed Array with col values or false on failure
|
|
*/
|
|
public function fetch_array($result = null)
|
|
{
|
|
return $this->_fetch_row($result, PDO::FETCH_NUM);
|
|
}
|
|
|
|
/**
|
|
* Get col values for a result row
|
|
*
|
|
* @param mixed $result Optional query handle
|
|
* @param int $mode Fetch mode identifier
|
|
*
|
|
* @return mixed Array with col values or false on failure
|
|
*/
|
|
protected function _fetch_row($result, $mode)
|
|
{
|
|
if ($result || ($result === null && ($result = $this->last_result))) {
|
|
if ($result !== true) {
|
|
return $result->fetch($mode);
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Adds LIMIT,OFFSET clauses to the query
|
|
*
|
|
* @param string $query SQL query
|
|
* @param int $limit Number of rows
|
|
* @param int $offset Offset
|
|
*
|
|
* @return string SQL query
|
|
*/
|
|
protected function set_limit($query, $limit = 0, $offset = 0)
|
|
{
|
|
if ($limit) {
|
|
$query .= ' LIMIT ' . intval($limit);
|
|
}
|
|
|
|
if ($offset) {
|
|
$query .= ' OFFSET ' . intval($offset);
|
|
}
|
|
|
|
return $query;
|
|
}
|
|
|
|
/**
|
|
* Returns list of tables in a database
|
|
*
|
|
* @return array List of all tables of the current database
|
|
*/
|
|
public function list_tables()
|
|
{
|
|
// get tables if not cached
|
|
if ($this->tables === null) {
|
|
$q = $this->query("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES"
|
|
. " WHERE TABLE_TYPE = 'BASE TABLE'"
|
|
. " ORDER BY TABLE_NAME");
|
|
|
|
$this->tables = $q ? $q->fetchAll(PDO::FETCH_COLUMN, 0) : array();
|
|
}
|
|
|
|
return $this->tables;
|
|
}
|
|
|
|
/**
|
|
* Returns list of columns in database table
|
|
*
|
|
* @param string $table Table name
|
|
*
|
|
* @return array List of table cols
|
|
*/
|
|
public function list_cols($table)
|
|
{
|
|
$q = $this->query('SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ?',
|
|
array($table));
|
|
|
|
if ($q) {
|
|
return $q->fetchAll(PDO::FETCH_COLUMN, 0);
|
|
}
|
|
|
|
return array();
|
|
}
|
|
|
|
/**
|
|
* Start transaction
|
|
*
|
|
* @return bool True on success, False on failure
|
|
*/
|
|
public function startTransaction()
|
|
{
|
|
$this->db_connect('w', true);
|
|
|
|
// check connection before proceeding
|
|
if (!$this->is_connected()) {
|
|
return $this->last_result = false;
|
|
}
|
|
|
|
$this->debug('BEGIN TRANSACTION');
|
|
|
|
return $this->last_result = $this->dbh->beginTransaction();
|
|
}
|
|
|
|
/**
|
|
* Commit transaction
|
|
*
|
|
* @return bool True on success, False on failure
|
|
*/
|
|
public function endTransaction()
|
|
{
|
|
$this->db_connect('w', true);
|
|
|
|
// check connection before proceeding
|
|
if (!$this->is_connected()) {
|
|
return $this->last_result = false;
|
|
}
|
|
|
|
$this->debug('COMMIT TRANSACTION');
|
|
|
|
return $this->last_result = $this->dbh->commit();
|
|
}
|
|
|
|
/**
|
|
* Rollback transaction
|
|
*
|
|
* @return bool True on success, False on failure
|
|
*/
|
|
public function rollbackTransaction()
|
|
{
|
|
$this->db_connect('w', true);
|
|
|
|
// check connection before proceeding
|
|
if (!$this->is_connected()) {
|
|
return $this->last_result = false;
|
|
}
|
|
|
|
$this->debug('ROLLBACK TRANSACTION');
|
|
|
|
return $this->last_result = $this->dbh->rollBack();
|
|
}
|
|
|
|
/**
|
|
* Release resources related to the last query result.
|
|
* When we know we don't need to access the last query result we can destroy it
|
|
* and release memory. Useful especially if the query returned big chunk of data.
|
|
*/
|
|
public function reset()
|
|
{
|
|
$this->last_result = null;
|
|
}
|
|
|
|
/**
|
|
* Terminate database connection.
|
|
*/
|
|
public function closeConnection()
|
|
{
|
|
$this->db_connected = false;
|
|
$this->db_index = 0;
|
|
|
|
// release statement and connection resources
|
|
$this->last_result = null;
|
|
$this->dbh = null;
|
|
$this->dbhs = array();
|
|
}
|
|
|
|
/**
|
|
* Formats input so it can be safely used in a query
|
|
*
|
|
* @param mixed $input Value to quote
|
|
* @param string $type Type of data (integer, bool, ident)
|
|
*
|
|
* @return string Quoted/converted string for use in query
|
|
*/
|
|
public function quote($input, $type = null)
|
|
{
|
|
// handle int directly for better performance
|
|
if ($type == 'integer' || $type == 'int') {
|
|
return intval($input);
|
|
}
|
|
|
|
if (is_null($input)) {
|
|
return 'NULL';
|
|
}
|
|
|
|
if ($input instanceof DateTime) {
|
|
return $this->quote($input->format($this->options['datetime_format']));
|
|
}
|
|
|
|
if ($type == 'ident') {
|
|
return $this->quote_identifier($input);
|
|
}
|
|
|
|
// create DB handle if not available
|
|
if (!$this->dbh) {
|
|
$this->db_connect('r');
|
|
}
|
|
|
|
if ($this->dbh) {
|
|
$map = array(
|
|
'bool' => PDO::PARAM_BOOL,
|
|
'integer' => PDO::PARAM_INT,
|
|
);
|
|
|
|
$type = isset($map[$type]) ? $map[$type] : PDO::PARAM_STR;
|
|
|
|
return strtr($this->dbh->quote($input, $type),
|
|
// escape ? and `
|
|
array('?' => '??', self::DEFAULT_QUOTE => self::DEFAULT_QUOTE.self::DEFAULT_QUOTE)
|
|
);
|
|
}
|
|
|
|
return 'NULL';
|
|
}
|
|
|
|
/**
|
|
* Escapes a string so it can be safely used in a query
|
|
*
|
|
* @param string $str A string to escape
|
|
*
|
|
* @return string Escaped string for use in a query
|
|
*/
|
|
public function escape($str)
|
|
{
|
|
if (is_null($str)) {
|
|
return 'NULL';
|
|
}
|
|
|
|
return substr($this->quote($str), 1, -1);
|
|
}
|
|
|
|
/**
|
|
* Quotes a string so it can be safely used as a table or column name
|
|
*
|
|
* @param string $str Value to quote
|
|
*
|
|
* @return string Quoted string for use in query
|
|
* @deprecated Replaced by rcube_db::quote_identifier
|
|
* @see rcube_db::quote_identifier
|
|
*/
|
|
public function quoteIdentifier($str)
|
|
{
|
|
return $this->quote_identifier($str);
|
|
}
|
|
|
|
/**
|
|
* Escapes a string so it can be safely used in a query
|
|
*
|
|
* @param string $str A string to escape
|
|
*
|
|
* @return string Escaped string for use in a query
|
|
* @deprecated Replaced by rcube_db::escape
|
|
* @see rcube_db::escape
|
|
*/
|
|
public function escapeSimple($str)
|
|
{
|
|
return $this->escape($str);
|
|
}
|
|
|
|
/**
|
|
* Quotes a string so it can be safely used as a table or column name
|
|
*
|
|
* @param string $str Value to quote
|
|
*
|
|
* @return string Quoted string for use in query
|
|
*/
|
|
public function quote_identifier($str)
|
|
{
|
|
$start = $this->options['identifier_start'];
|
|
$end = $this->options['identifier_end'];
|
|
$name = array();
|
|
|
|
foreach (explode('.', $str) as $elem) {
|
|
$elem = str_replace(array($start, $end), '', $elem);
|
|
$name[] = $start . $elem . $end;
|
|
}
|
|
|
|
return implode('.', $name);
|
|
}
|
|
|
|
/**
|
|
* Return SQL function for current time and date
|
|
*
|
|
* @param int $interval Optional interval (in seconds) to add/subtract
|
|
*
|
|
* @return string SQL function to use in query
|
|
*/
|
|
public function now($interval = 0)
|
|
{
|
|
if ($interval) {
|
|
$add = ' ' . ($interval > 0 ? '+' : '-') . ' INTERVAL ';
|
|
$add .= $interval > 0 ? intval($interval) : intval($interval) * -1;
|
|
$add .= ' SECOND';
|
|
}
|
|
|
|
return "now()" . $add;
|
|
}
|
|
|
|
/**
|
|
* Return list of elements for use with SQL's IN clause
|
|
*
|
|
* @param array $arr Input array
|
|
* @param string $type Type of data (integer, bool, ident)
|
|
*
|
|
* @return string Comma-separated list of quoted values for use in query
|
|
*/
|
|
public function array2list($arr, $type = null)
|
|
{
|
|
if (!is_array($arr)) {
|
|
return $this->quote($arr, $type);
|
|
}
|
|
|
|
foreach ($arr as $idx => $item) {
|
|
$arr[$idx] = $this->quote($item, $type);
|
|
}
|
|
|
|
return implode(',', $arr);
|
|
}
|
|
|
|
/**
|
|
* 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 $field Field name
|
|
*
|
|
* @return string SQL statement to use in query
|
|
* @deprecated
|
|
*/
|
|
public function unixtimestamp($field)
|
|
{
|
|
return "UNIX_TIMESTAMP($field)";
|
|
}
|
|
|
|
/**
|
|
* Return SQL statement to convert from a unix timestamp
|
|
*
|
|
* @param int $timestamp Unix timestamp
|
|
*
|
|
* @return string Date string in db-specific format
|
|
* @deprecated
|
|
*/
|
|
public function fromunixtime($timestamp)
|
|
{
|
|
return $this->quote(date($this->options['datetime_format'], $timestamp));
|
|
}
|
|
|
|
/**
|
|
* Return SQL statement for case insensitive LIKE
|
|
*
|
|
* @param string $column Field name
|
|
* @param string $value Search value
|
|
*
|
|
* @return string SQL statement to use in query
|
|
*/
|
|
public function ilike($column, $value)
|
|
{
|
|
return $this->quote_identifier($column).' LIKE '.$this->quote($value);
|
|
}
|
|
|
|
/**
|
|
* Abstract SQL statement for value concatenation
|
|
*
|
|
* @return string SQL statement to be used in query
|
|
*/
|
|
public function concat(/* col1, col2, ... */)
|
|
{
|
|
$args = func_get_args();
|
|
if (is_array($args[0])) {
|
|
$args = $args[0];
|
|
}
|
|
|
|
return '(' . implode(' || ', $args) . ')';
|
|
}
|
|
|
|
/**
|
|
* Encodes non-UTF-8 characters in string/array/object (recursive)
|
|
*
|
|
* @param mixed $input Data to fix
|
|
* @param bool $serialized Enable serialization
|
|
*
|
|
* @return mixed Properly UTF-8 encoded data
|
|
*/
|
|
public static function encode($input, $serialized = false)
|
|
{
|
|
// use Base64 encoding to workaround issues with invalid
|
|
// or null characters in serialized string (#1489142)
|
|
if ($serialized) {
|
|
return base64_encode(serialize($input));
|
|
}
|
|
|
|
if (is_object($input)) {
|
|
foreach (get_object_vars($input) as $idx => $value) {
|
|
$input->$idx = self::encode($value);
|
|
}
|
|
return $input;
|
|
}
|
|
else if (is_array($input)) {
|
|
foreach ($input as $idx => $value) {
|
|
$input[$idx] = self::encode($value);
|
|
}
|
|
|
|
return $input;
|
|
}
|
|
|
|
return utf8_encode($input);
|
|
}
|
|
|
|
/**
|
|
* Decodes encoded UTF-8 string/object/array (recursive)
|
|
*
|
|
* @param mixed $input Input data
|
|
* @param bool $serialized Enable serialization
|
|
*
|
|
* @return mixed Decoded data
|
|
*/
|
|
public static function decode($input, $serialized = false)
|
|
{
|
|
// use Base64 encoding to workaround issues with invalid
|
|
// or null characters in serialized string (#1489142)
|
|
if ($serialized) {
|
|
// Keep backward compatybility where base64 wasn't used
|
|
if (strpos(substr($input, 0, 16), ':') !== false) {
|
|
return self::decode(@unserialize($input));
|
|
}
|
|
|
|
return @unserialize(base64_decode($input));
|
|
}
|
|
|
|
if (is_object($input)) {
|
|
foreach (get_object_vars($input) as $idx => $value) {
|
|
$input->$idx = self::decode($value);
|
|
}
|
|
return $input;
|
|
}
|
|
else if (is_array($input)) {
|
|
foreach ($input as $idx => $value) {
|
|
$input[$idx] = self::decode($value);
|
|
}
|
|
return $input;
|
|
}
|
|
|
|
return utf8_decode($input);
|
|
}
|
|
|
|
/**
|
|
* Return correct name for a specific database table
|
|
*
|
|
* @param string $table Table name
|
|
* @param bool $quoted Quote table identifier
|
|
*
|
|
* @return string Translated table name
|
|
*/
|
|
public function table_name($table, $quoted = false)
|
|
{
|
|
// let plugins alter the table name (#1489837)
|
|
$plugin = rcube::get_instance()->plugins->exec_hook('db_table_name', array('table' => $table));
|
|
$table = $plugin['table'];
|
|
|
|
// add prefix to the table name if configured
|
|
if (($prefix = $this->options['table_prefix']) && strpos($table, $prefix) !== 0) {
|
|
$table = $prefix . $table;
|
|
}
|
|
|
|
if ($quoted) {
|
|
$table = $this->quote_identifier($table);
|
|
}
|
|
|
|
return $table;
|
|
}
|
|
|
|
/**
|
|
* Set class option value
|
|
*
|
|
* @param string $name Option name
|
|
* @param mixed $value Option value
|
|
*/
|
|
public function set_option($name, $value)
|
|
{
|
|
$this->options[$name] = $value;
|
|
}
|
|
|
|
/**
|
|
* Set DSN connection to be used for the given table
|
|
*
|
|
* @param string $table Table name
|
|
* @param string $mode DSN connection ('r' or 'w') to be used
|
|
*/
|
|
public function set_table_dsn($table, $mode)
|
|
{
|
|
$this->options['table_dsn_map'][$this->table_name($table)] = $mode;
|
|
}
|
|
|
|
/**
|
|
* MDB2 DSN string parser
|
|
*
|
|
* @param string $sequence Secuence name
|
|
*
|
|
* @return array DSN parameters
|
|
*/
|
|
public static function parse_dsn($dsn)
|
|
{
|
|
if (empty($dsn)) {
|
|
return null;
|
|
}
|
|
|
|
// Find phptype and dbsyntax
|
|
if (($pos = strpos($dsn, '://')) !== false) {
|
|
$str = substr($dsn, 0, $pos);
|
|
$dsn = substr($dsn, $pos + 3);
|
|
}
|
|
else {
|
|
$str = $dsn;
|
|
$dsn = null;
|
|
}
|
|
|
|
// Get phptype and dbsyntax
|
|
// $str => phptype(dbsyntax)
|
|
if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) {
|
|
$parsed['phptype'] = $arr[1];
|
|
$parsed['dbsyntax'] = !$arr[2] ? $arr[1] : $arr[2];
|
|
}
|
|
else {
|
|
$parsed['phptype'] = $str;
|
|
$parsed['dbsyntax'] = $str;
|
|
}
|
|
|
|
if (empty($dsn)) {
|
|
return $parsed;
|
|
}
|
|
|
|
// Get (if found): username and password
|
|
// $dsn => username:password@protocol+hostspec/database
|
|
if (($at = strrpos($dsn,'@')) !== false) {
|
|
$str = substr($dsn, 0, $at);
|
|
$dsn = substr($dsn, $at + 1);
|
|
if (($pos = strpos($str, ':')) !== false) {
|
|
$parsed['username'] = rawurldecode(substr($str, 0, $pos));
|
|
$parsed['password'] = rawurldecode(substr($str, $pos + 1));
|
|
}
|
|
else {
|
|
$parsed['username'] = rawurldecode($str);
|
|
}
|
|
}
|
|
|
|
// Find protocol and hostspec
|
|
// $dsn => proto(proto_opts)/database
|
|
if (preg_match('|^([^(]+)\((.*?)\)/?(.*?)$|', $dsn, $match)) {
|
|
$proto = $match[1];
|
|
$proto_opts = $match[2] ? $match[2] : false;
|
|
$dsn = $match[3];
|
|
}
|
|
// $dsn => protocol+hostspec/database (old format)
|
|
else {
|
|
if (strpos($dsn, '+') !== false) {
|
|
list($proto, $dsn) = explode('+', $dsn, 2);
|
|
}
|
|
if ( strpos($dsn, '//') === 0
|
|
&& strpos($dsn, '/', 2) !== false
|
|
&& $parsed['phptype'] == 'oci8'
|
|
) {
|
|
// Oracle's "Easy Connect" syntax:
|
|
// "username/password@[//]host[:port][/service_name]"
|
|
// e.g. "scott/tiger@//mymachine:1521/oracle"
|
|
$proto_opts = $dsn;
|
|
$pos = strrpos($proto_opts, '/');
|
|
$dsn = substr($proto_opts, $pos + 1);
|
|
$proto_opts = substr($proto_opts, 0, $pos);
|
|
}
|
|
else if (strpos($dsn, '/') !== false) {
|
|
list($proto_opts, $dsn) = explode('/', $dsn, 2);
|
|
}
|
|
else {
|
|
$proto_opts = $dsn;
|
|
$dsn = null;
|
|
}
|
|
}
|
|
|
|
// process the different protocol options
|
|
$parsed['protocol'] = $proto ?: 'tcp';
|
|
$proto_opts = rawurldecode($proto_opts);
|
|
if (strpos($proto_opts, ':') !== false) {
|
|
list($proto_opts, $parsed['port']) = explode(':', $proto_opts);
|
|
}
|
|
if ($parsed['protocol'] == 'tcp') {
|
|
$parsed['hostspec'] = $proto_opts;
|
|
}
|
|
else if ($parsed['protocol'] == 'unix') {
|
|
$parsed['socket'] = $proto_opts;
|
|
}
|
|
|
|
// Get database if any
|
|
// $dsn => database
|
|
if ($dsn) {
|
|
// /database
|
|
if (($pos = strpos($dsn, '?')) === false) {
|
|
$parsed['database'] = rawurldecode($dsn);
|
|
}
|
|
else {
|
|
// /database?param1=value1¶m2=value2
|
|
$parsed['database'] = rawurldecode(substr($dsn, 0, $pos));
|
|
$dsn = substr($dsn, $pos + 1);
|
|
|
|
if (strpos($dsn, '&') !== false) {
|
|
$opts = explode('&', $dsn);
|
|
}
|
|
else { // database?param1=value1
|
|
$opts = array($dsn);
|
|
}
|
|
foreach ($opts as $opt) {
|
|
list($key, $value) = explode('=', $opt);
|
|
if (!array_key_exists($key, $parsed) || false === $parsed[$key]) {
|
|
// don't allow params overwrite
|
|
$parsed[$key] = rawurldecode($value);
|
|
}
|
|
}
|
|
}
|
|
|
|
// remove problematic suffix (#7034)
|
|
$parsed['database'] = preg_replace('/;.*$/', '', $parsed['database']);
|
|
|
|
// Resolve relative path to the sqlite database file
|
|
// so for example it works with Roundcube Installer
|
|
if (!empty($parsed['phptype']) && !empty($parsed['database'])
|
|
&& stripos($parsed['phptype'], 'sqlite') === 0
|
|
&& $parsed['database'][0] != '/'
|
|
) {
|
|
$parsed['database'] = INSTALL_PATH . $parsed['database'];
|
|
}
|
|
}
|
|
|
|
return $parsed;
|
|
}
|
|
|
|
/**
|
|
* Returns PDO DSN string from DSN array
|
|
*
|
|
* @param array $dsn DSN parameters
|
|
*
|
|
* @return string DSN string
|
|
*/
|
|
protected function dsn_string($dsn)
|
|
{
|
|
$params = array();
|
|
$result = $dsn['phptype'] . ':';
|
|
|
|
if ($dsn['hostspec']) {
|
|
$params[] = 'host=' . $dsn['hostspec'];
|
|
}
|
|
|
|
if ($dsn['port']) {
|
|
$params[] = 'port=' . $dsn['port'];
|
|
}
|
|
|
|
if ($dsn['database']) {
|
|
$params[] = 'dbname=' . $dsn['database'];
|
|
}
|
|
|
|
if (!empty($params)) {
|
|
$result .= implode(';', $params);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Returns driver-specific connection options
|
|
*
|
|
* @param array $dsn DSN parameters
|
|
*
|
|
* @return array Connection options
|
|
*/
|
|
protected function dsn_options($dsn)
|
|
{
|
|
$result = array();
|
|
|
|
if ($this->db_pconn) {
|
|
$result[PDO::ATTR_PERSISTENT] = true;
|
|
}
|
|
|
|
if (!empty($dsn['prefetch'])) {
|
|
$result[PDO::ATTR_PREFETCH] = (int) $dsn['prefetch'];
|
|
}
|
|
|
|
if (!empty($dsn['timeout'])) {
|
|
$result[PDO::ATTR_TIMEOUT] = (int) $dsn['timeout'];
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Execute the given SQL script
|
|
*
|
|
* @param string $sql SQL queries to execute
|
|
*
|
|
* @return boolen True on success, False on error
|
|
*/
|
|
public function exec_script($sql)
|
|
{
|
|
$sql = $this->fix_table_names($sql);
|
|
$buff = '';
|
|
$exec = '';
|
|
|
|
foreach (explode("\n", $sql) as $line) {
|
|
$trimmed = trim($line);
|
|
if ($trimmed == '' || preg_match('/^--/', $trimmed)) {
|
|
continue;
|
|
}
|
|
|
|
if ($trimmed == 'GO') {
|
|
$exec = $buff;
|
|
}
|
|
else if ($trimmed[strlen($trimmed)-1] == ';') {
|
|
$exec = $buff . substr(rtrim($line), 0, -1);
|
|
}
|
|
|
|
if ($exec) {
|
|
$this->query($exec);
|
|
$buff = '';
|
|
$exec = '';
|
|
if ($this->db_error) {
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
$buff .= $line . "\n";
|
|
}
|
|
}
|
|
|
|
return !$this->db_error;
|
|
}
|
|
|
|
/**
|
|
* Parse SQL file and fix table names according to table prefix
|
|
*/
|
|
protected function fix_table_names($sql)
|
|
{
|
|
if (!$this->options['table_prefix']) {
|
|
return $sql;
|
|
}
|
|
|
|
$sql = preg_replace_callback(
|
|
'/((TABLE|TRUNCATE( TABLE)?|(?<!ON )UPDATE|INSERT INTO|FROM'
|
|
. '| ON(?! (DELETE|UPDATE))|REFERENCES|CONSTRAINT|FOREIGN KEY|INDEX|UNIQUE( INDEX)?)'
|
|
. '\s+(IF (NOT )?EXISTS )?[`"]*)([^`"\( \r\n]+)/',
|
|
array($this, 'fix_table_names_callback'),
|
|
$sql
|
|
);
|
|
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* Preg_replace callback for fix_table_names()
|
|
*/
|
|
protected function fix_table_names_callback($matches)
|
|
{
|
|
return $matches[1] . $this->options['table_prefix'] . $matches[count($matches)-1];
|
|
}
|
|
}
|