<?php
if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
/*********************************************************************************
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2012 SugarCRM Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with
 * this program; if not, see http://www.gnu.org/licenses or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo. If the display of the logo is not reasonably feasible for
 * technical reasons, the Appropriate Legal Notices must display the words
 * "Powered by SugarCRM".
 ********************************************************************************/

/*********************************************************************************

* Description: This file handles the Data base functionality for the application.
* It acts as the DB abstraction layer for the application. It depends on helper classes
* which generate the necessary SQL. This sql is then passed to PEAR DB classes.
* The helper class is chosen in DBManagerFactory, which is driven by 'db_type' in 'dbconfig' under config.php.
*
* All the functions in this class will work with any bean which implements the meta interface.
* The passed bean is passed to helper class which uses these functions to generate correct sql.
*
* The meta interface has the following functions:
* getTableName()                Returns table name of the object.
* getFieldDefinitions()         Returns a collection of field definitions in order.
* getFieldDefintion(name)       Return field definition for the field.
* getFieldValue(name)           Returns the value of the field identified by name.
*                               If the field is not set, the function will return boolean FALSE.
* getPrimaryFieldDefinition()   Returns the field definition for primary key
*
* The field definition is an array with the following keys:
*
* name      This represents name of the field. This is a required field.
* type      This represents type of the field. This is a required field and valid values are:
*           �   int
*           �   long
*           �   varchar
*           �   text
*           �   date
*           �   datetime
*           �   double
*           �   float
*           �   uint
*           �   ulong
*           �   time
*           �   short
*           �   enum
* length    This is used only when the type is varchar and denotes the length of the string.
*           The max value is 255.
* enumvals  This is a list of valid values for an enum separated by "|".
*           It is used only if the type is �enum�;
* required  This field dictates whether it is a required value.
*           The default value is �FALSE�.
* isPrimary This field identifies the primary key of the table.
*           If none of the fields have this flag set to �TRUE�,
*           the first field definition is assume to be the primary key.
*           Default value for this field is �FALSE�.
* default   This field sets the default value for the field definition.
*
*
* Portions created by SugarCRM are Copyright (C) SugarCRM, Inc.
* All Rights Reserved.
* Contributor(s): ______________________________________..
********************************************************************************/

require_once('include/database/MysqlManager.php');

/**
 * MySQL manager implementation for mysqli extension
 */
class MysqliManager extends MysqlManager
{
	/**
	 * @see DBManager::$dbType
	 */
	public $dbType = 'mysql';
	public $variant = 'mysqli';
	public $priority = 10;
	public $label = 'LBL_MYSQLI';

	/**
	 * @see DBManager::$backendFunctions
	 */
	protected $backendFunctions = array(
		'free_result'        => 'mysqli_free_result',
		'close'              => 'mysqli_close',
		'row_count'          => 'mysqli_num_rows',
		'affected_row_count' => 'mysqli_affected_rows',
		);

	/**
	 * @see MysqlManager::query()
	 */
	public function query($sql, $dieOnError = false, $msg = '', $suppress = false, $keepResult = false)
	{
		if(is_array($sql)) {
			return $this->queryArray($sql, $dieOnError, $msg, $suppress);
        }

		static $queryMD5 = array();

		parent::countQuery($sql);
		$GLOBALS['log']->info('Query:' . $sql);
		$this->checkConnection();
		$this->query_time = microtime(true);
		$this->lastsql = $sql;
		$result = $suppress?@mysqli_query($this->database,$sql):mysqli_query($this->database,$sql);
		$md5 = md5($sql);

		if (empty($queryMD5[$md5]))
			$queryMD5[$md5] = true;

		$this->query_time = microtime(true) - $this->query_time;
		$GLOBALS['log']->info('Query Execution Time:'.$this->query_time);

		// This is some heavy duty debugging, leave commented out unless you need this:
		/*
		$bt = debug_backtrace();
		for ( $i = count($bt) ; $i-- ; $i > 0 ) {
			if ( strpos('MysqliManager.php',$bt[$i]['file']) === false ) {
				$line = $bt[$i];
			}
		}

		$GLOBALS['log']->fatal("${line['file']}:${line['line']} ${line['function']} \nQuery: $sql\n");
		*/


		if($keepResult)
			$this->lastResult = $result;
		$this->checkError($msg.' Query Failed: ' . $sql, $dieOnError);

		return $result;
	}

	/**
	 * Returns the number of rows affected by the last query
	 *
	 * @return int
	 */
	public function getAffectedRowCount($result)
	{
		return mysqli_affected_rows($this->getDatabase());
	}

	/**
	 * Returns the number of rows returned by the result
	 *
	 * This function can't be reliably implemented on most DB, do not use it.
	 * @abstract
	 * @deprecated
	 * @param  resource $result
	 * @return int
	 */
	public function getRowCount($result)
	{
	    return mysqli_num_rows($result);
	}


    /**
	 * Disconnects from the database
	 *
	 * Also handles any cleanup needed
	 */
	public function disconnect()
	{
		$GLOBALS['log']->debug('Calling MySQLi::disconnect()');
		if(!empty($this->database)){
			$this->freeResult();
			mysqli_close($this->database);
			$this->database = null;
		}
	}

	/**
	 * @see DBManager::freeDbResult()
	 */
	protected function freeDbResult($dbResult)
	{
		if(!empty($dbResult))
			mysqli_free_result($dbResult);
	}

	/**
	 * @see DBManager::getFieldsArray()
	 */
	public function getFieldsArray($result, $make_lower_case = false)
	{
		$field_array = array();

		if (!isset($result) || empty($result))
			return 0;

		$i = 0;
		while ($i < mysqli_num_fields($result)) {
			$meta = mysqli_fetch_field_direct($result, $i);
			if (!$meta)
				return 0;

			if($make_lower_case == true)
				$meta->name = strtolower($meta->name);

			$field_array[] = $meta->name;

			$i++;
		}

		return $field_array;
	}

	/**
	 * @see DBManager::fetchRow()
	 */
	public function fetchRow($result)
	{
		if (empty($result))	return false;

		$row = mysqli_fetch_assoc($result);
		if($row == null) $row = false; //Make sure MySQLi driver results are consistent with other database drivers
		return $row;
	}

	/**
	 * @see DBManager::quote()
	 */
	public function quote($string)
	{
		return mysqli_real_escape_string($this->getDatabase(),$this->quoteInternal($string));
	}

	/**
	 * @see DBManager::connect()
	 */
	public function connect(array $configOptions = null, $dieOnError = false)
	{
		global $sugar_config;

		if (is_null($configOptions))
			$configOptions = $sugar_config['dbconfig'];

		if(!isset($this->database)) {

			//mysqli connector has a separate parameter for port.. We need to separate it out from the host name
			$dbhost=$configOptions['db_host_name'];
			$dbport=null;
			$pos=strpos($configOptions['db_host_name'],':');
			if ($pos !== false) {
				$dbhost=substr($configOptions['db_host_name'],0,$pos);
				$dbport=substr($configOptions['db_host_name'],$pos+1);
			}

			$this->database = mysqli_connect($dbhost,$configOptions['db_user_name'],$configOptions['db_password'],isset($configOptions['db_name'])?$configOptions['db_name']:'',$dbport);
			if(empty($this->database)) {
				$GLOBALS['log']->fatal("Could not connect to DB server ".$dbhost." as ".$configOptions['db_user_name'].". port " .$dbport . ": " . mysqli_connect_error());
				if($dieOnError) {
					if(isset($GLOBALS['app_strings']['ERR_NO_DB'])) {
						sugar_die($GLOBALS['app_strings']['ERR_NO_DB']);
					} else {
						sugar_die("Could not connect to the database. Please refer to sugarcrm.log for details.");
					}
				} else {
					return false;
				}
			}
		}

		if(!empty($configOptions['db_name']) && !@mysqli_select_db($this->database,$configOptions['db_name'])) {
			$GLOBALS['log']->fatal( "Unable to select database {$configOptions['db_name']}: " . mysqli_connect_error());
			if($dieOnError) {
					if(isset($GLOBALS['app_strings']['ERR_NO_DB'])) {
						sugar_die($GLOBALS['app_strings']['ERR_NO_DB']);
					} else {
						sugar_die("Could not connect to the database. Please refer to sugarcrm.log for details.");
					}
			} else {
				return false;
			}
	    }

		// cn: using direct calls to prevent this from spamming the Logs
	    mysqli_query($this->database,"SET CHARACTER SET utf8");
	    $names = "SET NAMES 'utf8'";
	    $collation = $this->getOption('collation');
	    if(!empty($collation)) {
	        $names .= " COLLATE '$collation'";
		}
	    mysqli_query($this->database,$names);

		if($this->checkError('Could Not Connect', $dieOnError))
			$GLOBALS['log']->info("connected to db");

		$this->connectOptions = $configOptions;
		return true;
	}

	/**
	 * (non-PHPdoc)
	 * @see MysqlManager::lastDbError()
	 */
	public function lastDbError()
	{
		if($this->database) {
		    if(mysqli_errno($this->database)) {
			    return "MySQL error ".mysqli_errno($this->database).": ".mysqli_error($this->database);
		    }
		} else {
			$err =  mysqli_connect_error();
			if($err) {
			    return $err;
			}
		}

		return false;
	}

	public function getDbInfo()
	{
		$charsets = $this->getCharsetInfo();
		$charset_str = array();
		foreach($charsets as $name => $value) {
			$charset_str[] = "$name = $value";
		}
		return array(
			"MySQLi Version" => @mysqli_get_client_info(),
			"MySQLi Host Info" => @mysqli_get_host_info($this->database),
			"MySQLi Server Info" => @mysqli_get_server_info($this->database),
			"MySQLi Client Encoding" =>  @mysqli_client_encoding($this->database),
			"MySQL Character Set Settings" => join(", ", $charset_str),
		);
	}

	/**
	 * Select database
	 * @param string $dbname
	 */
	protected function selectDb($dbname)
	{
		return mysqli_select_db($this->getDatabase(), $dbname);
	}

	/**
	 * Check if this driver can be used
	 * @return bool
	 */
	public function valid()
	{
		return function_exists("mysqli_connect") && empty($GLOBALS['sugar_config']['mysqli_disabled']);
	}
}
