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khosb/includes/kohana/modules/database/classes/Kohana/Config/Database/Reader.php

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2012-11-09 12:18:50 +00:00
<?php defined('SYSPATH') OR die('No direct script access.');
/**
* Database reader for the kohana config system
*
* @package Kohana/Database
* @category Configuration
* @author Kohana Team
* @copyright (c) 2012 Kohana Team
* @license http://kohanaframework.org/license
*/
class Kohana_Config_Database_Reader implements Kohana_Config_Reader
{
protected $_db_instance;
protected $_table_name = 'config';
/**
* Constructs the database reader object
*
* @param array Configuration for the reader
*/
public function __construct(array $config = NULL)
{
if (isset($config['instance']))
{
$this->_db_instance = $config['instance'];
}
elseif ($this->_db_instance === NULL)
{
$this->_db_instance = Database::$default;
}
if (isset($config['table_name']))
{
$this->_table_name = $config['table_name'];
}
}
/**
* Tries to load the specificed configuration group
*
* Returns FALSE if group does not exist or an array if it does
*
* @param string $group Configuration group
* @return boolean|array
*/
public function load($group)
{
/**
* Prevents the catch-22 scenario where the database config reader attempts to load the
* database connections details from the database.
*
* @link http://dev.kohanaframework.org/issues/4316
*/
if ($group === 'database')
return FALSE;
$query = DB::select('config_key', 'config_value')
->from($this->_table_name)
->where('group_name', '=', $group)
->execute($this->_db_instance);
return count($query) ? array_map('unserialize', $query->as_array('config_key', 'config_value')) : FALSE;
}
}