<?php
/*
* 2007-2011 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  2007-2011 PrestaShop SA
*  @version  Release: $Revision: 7837 $
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class StockMvtCore extends ObjectModel
{
	public		$id;

	public		$id_product;
	public		$id_product_attribute = NULL;
	public 		$id_order = NULL;
	public 		$id_employee = NULL;
	public 		$quantity;
	public 		$id_stock_mvt_reason;
	
	public		$date_add;
	public		$date_upd;
	
	protected	$table = 'stock_mvt';
	protected 	$identifier = 'id_stock_mvt';
	
 	protected 	$fieldsRequired = array('id_product', 'id_stock_mvt_reason', 'quantity');
 	protected 	$fieldsValidate = array(
		'id_product' => 'isUnsignedId', 'id_product_attribute' => 'isUnsignedId', 
		'id_order' => 'isUnsignedId','id_employee' => 'isUnsignedId',
 		'quantity' => 'isInt', 'id_stock_mvt_reason' => 'isUnsignedId'
	);

	protected	$webserviceParameters = array(
		'objectsNodeName' => 'stock_movements',
		'objectNodeName' => 'stock_movement',
		'fields' => array(
			'id_product' => array('xlink_resource'=> 'products'),
			'id_product_attribute' => array('xlink_resource'=> 'product_option_values'),
			'id_order' => array('xlink_resource'=> 'orders'),
			'id_employee' => array('xlink_resource'=> 'employees'),
			'id_stock_mvt_reason' => array('xlink_resource'=> 'stock_movement_reasons'),
		),
	);
	
	public function getFields()
	{
		parent::validateFields();
		$fields['id_product'] = (int)$this->id_product;
		$fields['id_product_attribute'] = (int)$this->id_product_attribute;
		$fields['id_order'] = (int)$this->id_order;
		$fields['id_employee'] = (int)$this->id_employee;
		$fields['id_stock_mvt_reason'] = (int)$this->id_stock_mvt_reason;
		$fields['quantity'] = (int)$this->quantity;
		$fields['date_add'] = pSQL($this->date_add);
		$fields['date_upd'] = pSQL($this->date_upd);
		return $fields;
	}
	
	public function add($autodate = true, $nullValues = false, $update_quantity = true)
	{
		if (!parent::add($autodate, $nullValues))
			return false;
		
		if (!$update_quantity)
			return true;

		if ($this->id_product_attribute)
		{
			$product = new Product((int)$this->id_product, false, Configuration::get('PS_LANG_DEFAULT'));
			return (Db::getInstance()->Execute('
				UPDATE `'._DB_PREFIX_.'product_attribute` 
				SET `quantity` = quantity+'.(int)$this->quantity.'
				WHERE `id_product` = '.(int)$product->id.' 
				AND `id_product_attribute` = '.(int)$this->id_product_attribute) 
			&& $product->updateQuantityProductWithAttributeQuantity());
		}
		else
			return Db::getInstance()->Execute('
				UPDATE `'._DB_PREFIX_.'product` 
				SET `quantity` = quantity+'.(int)$this->quantity.' 
				WHERE `id_product` = '.(int)$this->id_product);
	}
	
	public static function addMissingMvt($id_employee)
	{
		$products_without_attributes = Db::getInstance()->ExecuteS('
			SELECT p.`id_product`, pa.`id_product_attribute`, (p.`quantity` - SUM(IFNULL(sm.`quantity`, 0))) quantity
			FROM `'._DB_PREFIX_.'product` p
			LEFT JOIN `'._DB_PREFIX_.'stock_mvt` sm ON (sm.`id_product` = p.`id_product`)
			LEFT JOIN `'._DB_PREFIX_.'product_attribute` pa ON (pa.`id_product` = p.`id_product`)
			WHERE pa.`id_product_attribute` IS NULL
			GROUP BY p.`id_product`
		');
		
		$products_with_attributes = Db::getInstance()->ExecuteS('
			SELECT p.`id_product`, pa.`id_product_attribute`, SUM(pa.`quantity`) - SUM(IFNULL(sm.`quantity`, 0)) quantity
			FROM `'._DB_PREFIX_.'product` p
			LEFT JOIN `'._DB_PREFIX_.'product_attribute` pa ON (pa.`id_product` = p.`id_product`)
			LEFT JOIN `'._DB_PREFIX_.'stock_mvt` sm ON (sm.`id_product` = pa.`id_product` AND sm.`id_product_attribute` = pa.`id_product_attribute`)
			WHERE pa.`id_product_attribute` IS NOT NULL
			GROUP BY pa.`id_product_attribute`
		');

		$products = array_merge($products_without_attributes, $products_with_attributes);
		if ($products)
			foreach ($products AS $product)
			{
				if (!$product['quantity'])
					continue;
				$mvt = new StockMvt();
				foreach ($product AS $k => $row)
					$mvt->{$k} = $row;
				$mvt->id_employee = (int)$id_employee;
				$mvt->id_stock_mvt_reason = _STOCK_MOVEMENT_MISSING_REASON_;
				$mvt->add(true, false, false);
			}
	}	
}