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<?php
/*
* 2007-2014 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  2007-2014 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 SpecificPriceCore extends ObjectModel
{
	public	$id_product;
	public	$id_specific_price_rule = 0;
	public	$id_cart = 0;
	public	$id_product_attribute;
	public	$id_shop;
	public	$id_shop_group;
	public	$id_currency;
	public	$id_country;
	public	$id_group;
	public	$id_customer;
	public	$price;
	public	$from_quantity;
	public	$reduction;
	public	$reduction_type;
	public	$from;
	public	$to;

	/**
	 * @see ObjectModel::$definition
	 */
	public static $definition = array(
		'table' => 'specific_price',
		'primary' => 'id_specific_price',
		'fields' => array(
			'id_shop_group' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId'),
			'id_shop' => 				array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_cart' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_product' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_product_attribute' => 	array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId'),
			'id_currency' => 			array('type' => self::TYPE_INT, 'required' => true),
			'id_specific_price_rule' =>	array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId'),
			'id_country' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_group' => 				array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_customer' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'price' => 					array('type' => self::TYPE_FLOAT, 'validate' => 'isNegativePrice', 'required' => true),
			'from_quantity' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt', 'required' => true),
			'reduction' => 				array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
			'reduction_type' => 		array('type' => self::TYPE_STRING, 'validate' => 'isReductionType', 'required' => true),
			'from' => 					array('type' => self::TYPE_DATE, 'validate' => 'isDateFormat', 'required' => true),
			'to' => 					array('type' => self::TYPE_DATE, 'validate' => 'isDateFormat', 'required' => true),
		),
	);

	protected $webserviceParameters = array(
		'objectsNodeName' => 'specific_prices',
		'objectNodeName' => 'specific_price',
	        'fields' => array(
			'id_shop_group' => 			array('xlink_resource' => 'shop_groups'),
			'id_shop' => 				array('xlink_resource' => 'shops', 'required' => true),
			'id_cart' => 				array('xlink_resource' => 'carts', 'required' => true),
			'id_product' => 			array('xlink_resource' => 'products', 'required' => true),
			'id_product_attribute' => 		array('xlink_resource' => 'product_attributes'),
			'id_currency' => 			array('xlink_resource' => 'currencies', 'required' => true),
			'id_country' => 			array('xlink_resource' => 'countries', 'required' => true),
			'id_group' => 				array('xlink_resource' => 'groups', 'required' => true),
			'id_customer' => 			array('xlink_resource' => 'customers', 'required' => true),
	      	),
	);


	protected static $_specificPriceCache = array();
	protected static $_cache_priorities = array();

	public function add($autodate = true, $nullValues = false)
	{
		if (parent::add($autodate, $nullValues))
		{
			// Flush cache when we adding a new specific price
			SpecificPrice::$_specificPriceCache = array();
			Product::flushPriceCache();
			// Set cache of feature detachable to true
			Configuration::updateGlobalValue('PS_SPECIFIC_PRICE_FEATURE_ACTIVE', '1');
			return true;
		}
		return false;
	}

	public function update($null_values = false)
	{
		if (parent::update($null_values))
		{
			// Flush cache when we updating a new specific price
			SpecificPrice::$_specificPriceCache = array();
			Product::flushPriceCache();
			return true;
		}
		return false;
	}

	public function delete()
	{
		if (parent::delete())
		{
			// Flush cache when we deletind a new specific price
			SpecificPrice::$_specificPriceCache = array();
			Product::flushPriceCache();
			// Refresh cache of feature detachable
			Configuration::updateGlobalValue('PS_SPECIFIC_PRICE_FEATURE_ACTIVE', SpecificPrice::isCurrentlyUsed($this->def['table']));
			return true;
		}
		return false;
	}

	public static function getByProductId($id_product, $id_product_attribute = false, $id_cart = false)
	{
		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT *
			FROM `'._DB_PREFIX_.'specific_price`
			WHERE `id_product` = '.(int)$id_product.
			($id_product_attribute ? ' AND id_product_attribute = '.(int)$id_product_attribute : '').'
			AND id_cart = '.(int)$id_cart);
	}

	public static function deleteByIdCart($id_cart, $id_product = false, $id_product_attribute = false)
	{
		return Db::getInstance()->execute('
		    DELETE FROM `'._DB_PREFIX_.'specific_price`
            WHERE id_cart='.(int)$id_cart.
            ($id_product ? ' AND id_product='.(int)$id_product.' AND id_product_attribute='.(int)$id_product_attribute : ''));
	}

	public static function getIdsByProductId($id_product, $id_product_attribute = false, $id_cart = 0)
	{
		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT `id_specific_price`
			FROM `'._DB_PREFIX_.'specific_price`
			WHERE `id_product` = '.(int)$id_product.'
			AND id_product_attribute='.(int)$id_product_attribute.'
			AND id_cart='.(int)$id_cart);
	}

	/**
	 * score generation for quantity discount
	 */
	protected static function _getScoreQuery($id_product, $id_shop, $id_currency, $id_country, $id_group, $id_customer)
	{
	    $select = '(';

       $now = date('Y-m-d H:i:s');
       $select .= ' IF (\''.$now.'\' >= `from` AND \''.$now.'\' <= `to`, '.pow(2, 0).', 0) + ';

	    $priority = SpecificPrice::getPriority($id_product);
	    foreach (array_reverse($priority) as $k => $field)
			if (!empty($field))
				$select .= ' IF (`'.bqSQL($field).'` = '.(int)$$field.', '.pow(2, $k + 1).', 0) + ';

	    return rtrim($select, ' +').') AS `score`';
	}

    public static function getPriority($id_product)
    {
		if (!SpecificPrice::isFeatureActive())
			return explode(';', Configuration::get('PS_SPECIFIC_PRICE_PRIORITIES'));

		if (!isset(SpecificPrice::$_cache_priorities[(int)$id_product]))
		{
			SpecificPrice::$_cache_priorities[(int)$id_product] = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
				SELECT `priority`, `id_specific_price_priority`
				FROM `'._DB_PREFIX_.'specific_price_priority`
				WHERE `id_product` = '.(int)$id_product.'
				ORDER BY `id_specific_price_priority` DESC
			');
		}

		$priority = SpecificPrice::$_cache_priorities[(int)$id_product];

	    if (!$priority)
	        $priority = Configuration::get('PS_SPECIFIC_PRICE_PRIORITIES');
		$priority = 'id_customer;'.$priority;

	    return preg_split('/;/', $priority);
    }

	public static function getSpecificPrice($id_product, $id_shop, $id_currency, $id_country, $id_group, $quantity, $id_product_attribute = null, $id_customer = 0, $id_cart = 0, $real_quantity = 0)
	{
		if (!SpecificPrice::isFeatureActive())
			return array();
		/*
		** The date is not taken into account for the cache, but this is for the better because it keeps the consistency for the whole script.
		** The price must not change between the top and the bottom of the page
		*/

		$key = ((int)$id_product.'-'.(int)$id_shop.'-'.(int)$id_currency.'-'.(int)$id_country.'-'.(int)$id_group.'-'.(int)$quantity.'-'.(int)$id_product_attribute.'-'.(int)$id_cart.'-'.(int)$id_customer.'-'.(int)$real_quantity);
		if (!array_key_exists($key, SpecificPrice::$_specificPriceCache))
		{
			$now = date('Y-m-d H:i:s');
			$query = '
			SELECT *, '.SpecificPrice::_getScoreQuery($id_product, $id_shop, $id_currency, $id_country, $id_group, $id_customer).'
				FROM `'._DB_PREFIX_.'specific_price`
				WHERE `id_product` IN (0, '.(int)$id_product.')
				AND `id_product_attribute` IN (0, '.(int)$id_product_attribute.')
				AND `id_shop` IN (0, '.(int)$id_shop.')
				AND `id_currency` IN (0, '.(int)$id_currency.')
				AND `id_country` IN (0, '.(int)$id_country.')
				AND `id_group` IN (0, '.(int)$id_group.')
				AND `id_customer` IN (0, '.(int)$id_customer.')
				AND
				(
					(`from` = \'0000-00-00 00:00:00\' OR \''.$now.'\' >= `from`)
					AND
					(`to` = \'0000-00-00 00:00:00\' OR \''.$now.'\' <= `to`)
				)
				AND id_cart IN (0, '.(int)$id_cart.') 
				AND IF(`from_quantity` > 1, `from_quantity`, 0) <= ';

			$query .= (Configuration::get('PS_QTY_DISCOUNT_ON_COMBINATION') || !$id_cart || !$real_quantity) ? (int)$quantity : max(1, (int)$real_quantity);			
			$query .= ' ORDER BY `id_product_attribute` DESC, `from_quantity` DESC, `id_specific_price_rule` ASC, `score` DESC';
			
			SpecificPrice::$_specificPriceCache[$key] = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow($query);
				
		}
		return SpecificPrice::$_specificPriceCache[$key];
	}

	public static function setPriorities($priorities)
	{
		$value = '';
		if (is_array($priorities))
			foreach ($priorities as $priority)
				$value .= pSQL($priority).';';

        SpecificPrice::deletePriorities();

		return Configuration::updateValue('PS_SPECIFIC_PRICE_PRIORITIES', rtrim($value, ';'));
	}

	public static function deletePriorities()
	{
	    return Db::getInstance()->execute('
	    TRUNCATE `'._DB_PREFIX_.'specific_price_priority`
	    ');
	}

	public static function setSpecificPriority($id_product, $priorities)
	{
		$value = '';
		foreach ($priorities as $priority)
			$value .= pSQL($priority).';';

		return Db::getInstance()->execute('
		INSERT INTO `'._DB_PREFIX_.'specific_price_priority` (`id_product`, `priority`)
		VALUES ('.(int)$id_product.',\''.pSQL(rtrim($value, ';')).'\')
		ON DUPLICATE KEY UPDATE `priority` = \''.pSQL(rtrim($value, ';')).'\'
		');
	}

	public static function getQuantityDiscounts($id_product, $id_shop, $id_currency, $id_country, $id_group, $id_product_attribute = null, $all_combinations = false, $id_customer = 0)
	{
		if (!SpecificPrice::isFeatureActive())
			return array();

		$now = date('Y-m-d H:i:s');
		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT *,
					'.SpecificPrice::_getScoreQuery($id_product, $id_shop, $id_currency, $id_country, $id_group, $id_customer).'
			FROM `'._DB_PREFIX_.'specific_price`
			WHERE
					`id_product` IN(0, '.(int)$id_product.') AND
					'.(!$all_combinations ? '`id_product_attribute` IN(0, '.(int)$id_product_attribute.') AND ' : '').'
					`id_shop` IN(0, '.(int)$id_shop.') AND
					`id_currency` IN(0, '.(int)$id_currency.') AND
					`id_country` IN(0, '.(int)$id_country.') AND
					`id_group` IN(0, '.(int)$id_group.') AND
					`id_customer` IN(0, '.(int)$id_customer.')
					AND
					(
						(`from` = \'0000-00-00 00:00:00\' OR \''.$now.'\' >= `from`)
						AND
						(`to` = \'0000-00-00 00:00:00\' OR \''.$now.'\' <= `to`)
					)
					ORDER BY `id_product_attribute` DESC, `from_quantity` DESC, `id_specific_price_rule` ASC, `score` DESC
		');

		$targeted_prices = array();
		$last_quantity = array();

		foreach ($res as $specific_price)
		{
			if (!isset($last_quantity[(int)$specific_price['id_product_attribute']]))
				 $last_quantity[(int)$specific_price['id_product_attribute']] = $specific_price['from_quantity'];
			elseif ($last_quantity[(int)$specific_price['id_product_attribute']] == $specific_price['from_quantity'])
		        continue;

			$last_quantity[(int)$specific_price['id_product_attribute']] = $specific_price['from_quantity'];
            if ($specific_price['from_quantity'] > 1)
    		    $targeted_prices[] = $specific_price;
		}

		return $targeted_prices;
	}

	public static function getQuantityDiscount($id_product, $id_shop, $id_currency, $id_country, $id_group, $quantity, $id_product_attribute = null, $id_customer = 0)
	{
		if (!SpecificPrice::isFeatureActive())
			return array();

		$now = date('Y-m-d H:i:s');
		return Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow('
			SELECT *,
					'.SpecificPrice::_getScoreQuery($id_product, $id_shop, $id_currency, $id_country, $id_group, $id_customer).'
			FROM `'._DB_PREFIX_.'specific_price`
			WHERE
					`id_product` IN(0, '.(int)$id_product.') AND
					`id_product_attribute` IN(0, '.(int)$id_product_attribute.') AND
					`id_shop` IN(0, '.(int)$id_shop.') AND
					`id_currency` IN(0, '.(int)$id_currency.') AND
					`id_country` IN(0, '.(int)$id_country.') AND
					`id_group` IN(0, '.(int)$id_group.') AND
					`id_customer` IN(0, '.(int)$id_customer.') AND
					`from_quantity` >= '.(int)$quantity.'
					AND
					(
						(`from` = \'0000-00-00 00:00:00\' OR \''.$now.'\' >= `from`)
						AND
						(`to` = \'0000-00-00 00:00:00\' OR \''.$now.'\' <= `to`)
					)
					ORDER BY `from_quantity` DESC, `score` DESC
		');
	}

	public static function getProductIdByDate($id_shop, $id_currency, $id_country, $id_group, $beginning, $ending, $id_customer = 0, $with_combination_id = false)
	{
		if (!SpecificPrice::isFeatureActive())
			return array();

		$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT `id_product`, `id_product_attribute`
			FROM `'._DB_PREFIX_.'specific_price`
			WHERE	`id_shop` IN(0, '.(int)$id_shop.') AND
					`id_currency` IN(0, '.(int)$id_currency.') AND
					`id_country` IN(0, '.(int)$id_country.') AND
					`id_group` IN(0, '.(int)$id_group.') AND
					`id_customer` IN(0, '.(int)$id_customer.') AND
					`from_quantity` = 1 AND
					(
						(`from` = \'0000-00-00 00:00:00\' OR \''.pSQL($beginning).'\' >= `from`)
						AND
						(`to` = \'0000-00-00 00:00:00\' OR \''.pSQL($ending).'\' <= `to`)
					)
					AND
					`reduction` > 0
		', false);
		$ids_product = array();
		while ($row = Db::getInstance()->nextRow($result))
			$ids_product[] = $with_combination_id ? array('id_product' => (int)$row['id_product'], 'id_product_attribute' => (int)$row['id_product_attribute']) : (int)$row['id_product'];
		return $ids_product;
	}

	public static function deleteByProductId($id_product)
	{
		if (Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'specific_price` WHERE `id_product` = '.(int)$id_product))
		{
			// Refresh cache of feature detachable
			Configuration::updateGlobalValue('PS_SPECIFIC_PRICE_FEATURE_ACTIVE', SpecificPrice::isCurrentlyUsed('specific_price'));
			return true;
		}
		return false;
	}

	public function duplicate($id_product = false)
	{
		if ($id_product)
			$this->id_product = (int)$id_product;
		unset($this->id);
		return $this->add();
	}

	/**
	 * This method is allow to know if a feature is used or active
	 * @since 1.5.0.1
	 * @return bool
	 */
	public static function isFeatureActive()
	{
		static $feature_active = null;

		if ($feature_active === null)
			$feature_active = Configuration::get('PS_SPECIFIC_PRICE_FEATURE_ACTIVE');
		return $feature_active;
	}
	
	public static function exists($id_product, $id_product_attribute, $id_shop, $id_group, $id_country, $id_currency, $id_customer, $from_quantity, $from, $to, $rule = false)
	{
		$rule = ' AND `id_specific_price_rule`'.(!$rule ? '=0' : '!=0');
		return (int)Db::getInstance()->getValue('SELECT `id_specific_price`
																FROM '._DB_PREFIX_.'specific_price
																WHERE `id_product`='.(int)$id_product.' AND
																	`id_product_attribute`='.(int)$id_product_attribute.' AND
																	`id_shop`='.(int)$id_shop.' AND
																	`id_group`='.(int)$id_group.' AND
																	`id_country`='.(int)$id_country.' AND
																	`id_currency`='.(int)$id_currency.' AND
																	`id_customer`='.(int)$id_customer.' AND
																	`from_quantity`='.(int)$from_quantity.' AND
																	`from` >= \''.pSQL($from).'\' AND
																	 `to` <= \''.pSQL($to).'\''.$rule);
	}
}


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