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<?php

/* --------------------------------------------------------------
   AddonValueStorageFactory.inc.php 2016-06-27
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2016 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

MainFactory::load_class('AddonValueStorageFactoryInterface');

/**
 * Class AddonValueStorageFactory
 *
 * @category System
 * @package  AddonValue
 */
class AddonValueStorageFactory implements AddonValueStorageFactoryInterface
{
    /**
     * @var CI_DB_query_builder
     */
    protected $db;
    
    /**
     * Contains the container-storage mapping used for the creation of the correct storage object.
     *
     * @var array
     */
    protected $map = array(
        'OrderInterface'     => 'OrderAddonValueStorage',
        'OrderItemInterface' => 'OrderItemAddonValueStorage',
        'CustomerInterface'  => 'CustomerAddonValueStorage',
        'CategoryInterface'  => 'CategoryAddonValueStorage',
        'ProductInterface'  => 'ProductAddonValueStorage'
    );
    
    
    /**
     * AddonValueStorageFactory Constructor
     *
     * @param CI_DB_query_builder $db
     */
    public function __construct(CI_DB_query_builder $db)
    {
        $this->db = $db;
    }
    
    
    /**
     * Creates the correct addon value storage container object.
     *
     * @param AddonValueContainerInterface $container
     *
     * @return AbstractAddonValueStorage
     */
    public function createAddonValueStorageByContainerObject(AddonValueContainerInterface $container)
    {
        $addonValueStorage = null;
        
        foreach($this->map as $containerClass => $storageClass)
        {
            if(is_a($container, $containerClass) === true)
            {
                $addonValueStorage = MainFactory::create($storageClass, $this->db);
            }
        }
        
        if($addonValueStorage === null)
        {
            throw new UnexpectedValueException('No AddonValueStorage class matches the provided $container: '
                                               . get_class($container));
        }
        
        return $addonValueStorage;
    }
}