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583 lines
15 KiB
PHP
583 lines
15 KiB
PHP
<?php
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/*
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+-----------------------------------------------------------------------+
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| program/include/rcube_db.inc |
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| This file is part of the RoundCube Webmail client |
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| Copyright (C) 2005-2007, RoundCube Dev. - Switzerland |
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| Licensed under the GNU GPL |
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| PURPOSE: |
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| PEAR:DB wrapper class that implements PEAR DB functions |
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| See http://pear.php.net/package/DB |
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+-----------------------------------------------------------------------+
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| Author: David Saez Padros <david@ols.es> |
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| Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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$Id$
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*/
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/**
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* Obtain the PEAR::DB class that is used for abstraction
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*/
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require_once('DB.php');
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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::DB 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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* @version 1.17
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* @link http://pear.php.net/package/DB
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*/
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class rcube_db
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{
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var $db_dsnw; // DSN for write operations
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var $db_dsnr; // DSN for read operations
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var $db_connected = false; // Already connected ?
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var $db_mode = ''; // Connection mode
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var $db_handle = 0; // Connection handle
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var $db_pconn = false; // Use persistent connections
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var $db_error = false;
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var $db_error_msg = '';
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var $a_query_results = array('dummy');
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var $last_res_id = 0;
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/**
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* Object constructor
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*
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* @param string DSN for read/write operations
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* @param string Optional DSN for read only operations
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*/
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function __construct($db_dsnw, $db_dsnr='', $pconn=false)
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{
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if ($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 = DB::parseDSN($db_dsnw);
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$this->db_provider = $dsn_array['phptype'];
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}
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/**
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* PHP 4 object constructor
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*
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* @see rcube_db::__construct
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*/
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function rcube_db($db_dsnw, $db_dsnr='', $pconn=false)
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{
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$this->__construct($db_dsnw, $db_dsnr, $pconn);
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}
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/**
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* Connect to specific database
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*
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* @param string DSN for DB connections
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* @return object PEAR database handle
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* @access private
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*/
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function dsn_connect($dsn)
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{
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// Use persistent connections if available
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$dbh = DB::connect($dsn, array('persistent' => $this->db_pconn));
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if (DB::isError($dbh))
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{
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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' => 603, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
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'message' => $this->db_error_msg), TRUE, FALSE);
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return FALSE;
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}
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else if ($this->db_provider=='sqlite')
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{
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$dsn_array = DB::parseDSN($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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return $dbh;
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}
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/**
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* Connect to appropiate databse
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* depending on the operation
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*
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* @param string Connection mode (r|w)
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* @access public
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*/
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function db_connect($mode)
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{
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$this->db_mode = $mode;
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// Already connected
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if ($this->db_connected)
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{
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// no replication, current connection is ok
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if ($this->db_dsnw==$this->db_dsnr)
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return;
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// connected to master, current connection is ok
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if ($this->db_mode=='w')
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return;
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// Same mode, current connection is ok
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if ($this->db_mode==$mode)
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return;
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}
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if ($mode=='r')
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$dsn = $this->db_dsnr;
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else
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$dsn = $this->db_dsnw;
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$this->db_handle = $this->dsn_connect($dsn);
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$this->db_connected = $this->db_handle ? TRUE : FALSE;
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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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*/
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function is_error()
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{
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return $this->db_error ? $this->db_error_msg : FALSE;
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}
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/**
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* Execute a SQL query
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*
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* @param string SQL query to execute
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* @param mixed Values to be inserted in query
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* @return number Query handle identifier
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* @access public
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*/
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function query()
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{
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$params = func_get_args();
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$query = array_shift($params);
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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, $params);
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}
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/**
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* Execute a SQL query with limits
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*
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* @param string SQL query to execute
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* @param number Offset for LIMIT statement
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* @param number Number of rows for LIMIT statement
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* @param array Values to be inserted in query
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* @return number Query handle identifier
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* @access private
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*/
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function _query($query, $offset, $numrows, $params)
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{
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// Read or write ?
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if (strtolower(trim(substr($query,0,6)))=='select')
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$mode='r';
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else
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$mode='w';
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$this->db_connect($mode);
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if (!$this->db_connected)
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return FALSE;
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if ($this->db_provider == 'sqlite')
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$this->_sqlite_prepare();
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if ($numrows || $offset)
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$result = $this->db_handle->limitQuery($query,$offset,$numrows,$params);
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else
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$result = $this->db_handle->query($query, $params);
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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 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_handle)
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return FALSE;
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if ($result = $this->_get_result($res_id))
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return $result->numRows();
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else
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return FALSE;
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}
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/**
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* Get number of affected rows fort he last query
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*
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* @return mixed Number of rows or FALSE on failure
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* @access public
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*/
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function affected_rows()
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{
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if (!$this->db_handle)
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return FALSE;
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return $this->db_handle->affectedRows();
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}
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/**
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* Get last inserted record ID
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* For Postgres databases, a sequence name is required
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*
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* @param string Sequence name for increment
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* @return mixed ID or FALSE on failure
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* @access public
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*/
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function insert_id($sequence = '')
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{
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if (!$this->db_handle || $this->db_mode=='r')
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return FALSE;
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switch($this->db_provider)
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{
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case 'pgsql':
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$result = &$this->db_handle->getOne("SELECT CURRVAL('$sequence')");
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if (DB::isError($result))
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raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
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'message' => $result->getMessage()), TRUE, FALSE);
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return $result;
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case 'mssql':
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$result = &$this->db_handle->getOne("SELECT @@IDENTITY");
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if (DB::isError($result))
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raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
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'message' => $result->getMessage()), TRUE, FALSE);
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return $result;
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case 'mysql': // This is unfortuneate
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return mysql_insert_id($this->db_handle->connection);
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case 'mysqli':
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return mysqli_insert_id($this->db_handle->connection);
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case 'sqlite':
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return sqlite_last_insert_rowid($this->db_handle->connection);
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default:
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die("portability issue with this database, please have the developer fix");
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}
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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 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, DB_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 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, DB_FETCHMODE_ORDERED);
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}
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/**
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* Get co values for a result row
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*
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* @param object Query result handle
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* @param number 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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function _fetch_row($result, $mode)
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{
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if (!$result || DB::isError($result))
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{
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raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
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'message' => $this->db_link->getMessage()), TRUE, FALSE);
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return FALSE;
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}
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elseif (!is_object($result))
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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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* Formats input so it can be safely used in a query
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*
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* @param mixed Value to quote
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* @return string Quoted/converted string for use in query
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* @access public
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*/
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function quote($input)
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{
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// create DB handle if not available
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if (!$this->db_handle)
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$this->db_connect('r');
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// escape pear identifier chars
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$rep_chars = array('?' => '\?',
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'!' => '\!',
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'&' => '\&');
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return $this->db_handle->quoteSmart(strtr($input, $rep_chars));
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}
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/**
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* Quotes a string so it can be safely used as a table or column name
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*
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* @param string Value to quote
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* @return string Quoted string for use in query
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* @deprecated Replaced by rcube_db::quote_identifier
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* @see rcube_db::quote_identifier
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* @access public
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*/
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function quoteIdentifier($str)
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{
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return $this->quote_identifier($str);
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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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*
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* @param string Value to quote
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* @return string Quoted string for use in query
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* @access public
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*/
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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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return $this->db_handle->quoteIdentifier($str);
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}
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/*
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* Return SQL function for current time and date
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*
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* @return string SQL function to use in query
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* @access public
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*/
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function now()
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{
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switch($this->db_provider)
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{
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case 'mssql':
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return "getdate()";
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default:
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return "now()";
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}
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}
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/**
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* Return SQL statement to convert a field value into a unix timestamp
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*
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* @param string Field name
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* @return string SQL statement to use in query
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* @access public
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*/
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function unixtimestamp($field)
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{
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switch($this->db_provider)
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{
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case 'pgsql':
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return "EXTRACT (EPOCH FROM $field)";
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case 'mssql':
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return "datediff(s, '1970-01-01 00:00:00', $field)";
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default:
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return "UNIX_TIMESTAMP($field)";
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}
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}
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/**
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* Return SQL statement to convert from a unix timestamp
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*
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* @param string Field name
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* @return string SQL statement to use in query
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* @access public
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*/
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function fromunixtime($timestamp)
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{
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switch($this->db_provider)
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{
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case 'mysqli':
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case 'mysql':
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case 'sqlite':
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return sprintf("FROM_UNIXTIME(%d)", $timestamp);
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default:
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return date("'Y-m-d H:i:s'", $timestamp);
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}
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}
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/**
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* Adds a query result and returns a handle ID
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*
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* @param object Query handle
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* @return mixed Handle ID or FALE on failure
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* @access private
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*/
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function _add_result($res)
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{
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// sql error occured
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if (DB::isError($res))
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{
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raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
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'message' => $res->getMessage() . " Query: " . substr(preg_replace('/[\r\n]+\s*/', ' ', $res->userinfo), 0, 512)), TRUE, FALSE);
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return FALSE;
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}
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else
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{
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$res_id = sizeof($this->a_query_results);
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$this->a_query_results[$res_id] = $res;
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$this->last_res_id = $res_id;
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return $res_id;
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}
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}
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/**
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* Resolves a given handle ID and returns the according query handle
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* If no ID is specified, the last ressource handle will be returned
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*
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* @param number Handle ID
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* @return mixed Ressource handle or FALE on failure
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* @access private
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*/
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function _get_result($res_id=NULL)
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{
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if ($res_id==NULL)
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$res_id = $this->last_res_id;
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if ($res_id && isset($this->a_query_results[$res_id]))
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return $this->a_query_results[$res_id];
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else
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return FALSE;
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}
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|
|
|
|
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/**
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* Create a sqlite database from a file
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*
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* @param object SQLite database handle
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* @param string File path to use for DB creation
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* @access private
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*/
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function _sqlite_create_database($dbh, $file_name)
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{
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if (empty($file_name) || !is_string($file_name))
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return;
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$data = '';
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if ($fd = fopen($file_name, 'r'))
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{
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$data = fread($fd, filesize($file_name));
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fclose($fd);
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}
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if (strlen($data))
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sqlite_exec($dbh->connection, $data);
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}
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|
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/**
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* Add some proprietary database functions to the current SQLite handle
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* in order to make it MySQL compatible
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*
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* @access private
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*/
|
|
function _sqlite_prepare()
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|
{
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include_once('include/rcube_sqlite.inc');
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|
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// we emulate via callback some missing MySQL function
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sqlite_create_function($this->db_handle->connection, "from_unixtime", "rcube_sqlite_from_unixtime");
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sqlite_create_function($this->db_handle->connection, "unix_timestamp", "rcube_sqlite_unix_timestamp");
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sqlite_create_function($this->db_handle->connection, "now", "rcube_sqlite_now");
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sqlite_create_function($this->db_handle->connection, "md5", "rcube_sqlite_md5");
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}
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} // end class rcube_db
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?>
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