<?php defined('SYSPATH') or die('No direct script access.');
/**
 * MySQL database connection.
 * 
 * $Id: Database_Mysqli.php 4712 2009-12-10 21:47:09Z cbandy $
 * 
 * @package    Kohana
 * @author     Kohana Team
 * @copyright  (c) 2008-2009 Kohana Team
 * @license    http://kohanaphp.com/license
 */

define('RUNS_MYSQLND', function_exists('mysqli_fetch_all'));

class Database_Mysqli_Core extends Database_Mysql {

	public function connect()
	{
		if (is_object($this->connection))
			return;

		extract($this->config['connection']);

		// Persistent connections are supported as of PHP 5.3
		if (RUNS_MYSQLND AND $this->config['persistent'] === TRUE)
		{
			$host = 'p:'.$host;
		}

		$host = isset($host) ? $host : $socket;

		$mysqli = mysqli_init();
			
		if ( ! $mysqli->real_connect($host, $user, $pass, $database, $port, $socket, $params))
			throw new Database_Exception('#:errno: :error',
				array(':error' => $mysqli->connect_error, ':errno' => $mysqli->connect_errno));
			
		$this->connection = $mysqli;
			
		if (isset($this->config['character_set']))
		{
			// Set the character set
			$this->set_charset($this->config['character_set']);
		}
	}

	public function disconnect()
	{
		if (is_object($this->connection))
		{
			$this->connection->close();
		}

		$this->connection = NULL;
	}

	public function set_charset($charset)
	{
		// Make sure the database is connected
		is_object($this->connection) or $this->connect();

		if ( ! $this->connection->set_charset($charset))
		{
			// Unable to set charset
			throw new Database_Exception('#:errno: :error',
				array(':error' => $this->connection->connect_error,
				':errno' => $this->connection->connect_errno));
		}
	}

	public function query_execute($sql)
	{
		// Make sure the database is connected
		is_object($this->connection) or $this->connect();

		$result = $this->connection->query($sql);

		// Set the last query
		$this->last_query = $sql;

		return new Database_Mysqli_Result($result, $sql, $this->connection, $this->config['object']);
	}

	public function escape($value)
	{
		// Make sure the database is connected
		is_object($this->connection) or $this->connect();

		return $this->connection->real_escape_string($value);
	}

} // End Database_MySQLi