<?php
/**
 * 2007-2015 PrestaShop
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to http://www.prestashop.com for more information.
 *
 *  @author 	PrestaShop SA <contact@prestashop.com>
 *  @copyright  2007-2015 PrestaShop SA
 *  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 *  International Registered Trademark & Property of PrestaShop SA
 */

class Core_Foundation_Database_EntityManager
{
	private $db;
	private $configuration;

	private $entityMetaData = array();

	public function __construct(
        Core_Foundation_Database_DatabaseInterface $db,
        Core_Business_ConfigurationInterface $configuration
    )
    {
		$this->db = $db;
		$this->configuration = $configuration;
    }

	/**
	 * Return current database object used
	 * @return Core_Foundation_Database_DatabaseInterface
	 */
	public function getDatabase()
	{
		return $this->db;
	}

	/**
	 * Return current repository used
	 * @param $className
	 * @return mixed
	 */
	public function getRepository($className)
	{
        if (is_callable(array($className, 'getRepositoryClassName'))) {
            $repositoryClass = $className::getRepositoryClassName();
        } else {
            $repositoryClass = null;
        }

		if (!$repositoryClass) {
			$repositoryClass = 'Core_Foundation_Database_EntityRepository';
		}

        $repository = new $repositoryClass(
			$this,
			$this->configuration->get('_DB_PREFIX_'),
			$this->getEntityMetaData($className)
		);

		return $repository;
	}

	/**
	 * Return entity's meta data
	 * @param $className
	 * @return mixed
	 * @throws Adapter_Exception
	 */
	public function getEntityMetaData($className)
	{
		if (!array_key_exists($className, $this->entityMetaData)) {
			$metaDataRetriever = new Adapter_EntityMetaDataRetriever;
			$this->entityMetaData[$className] = $metaDataRetriever->getEntityMetaData($className);
		}

		return $this->entityMetaData[$className];
	}

	/**
	 * Flush entity to DB
	 * @param Core_Foundation_Database_EntityInterface $entity
	 * @return $this
	 */
	public function save(Core_Foundation_Database_EntityInterface $entity)
	{
		$entity->save();
		return $this;
	}

	/**
	 * DElete entity from DB
	 * @param Core_Foundation_Database_EntityInterface $entity
	 * @return $this
	 */
	public function delete(Core_Foundation_Database_EntityInterface $entity)
	{
		$entity->delete();
		return $this;
	}
}
