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<?php
/**
 * 2007-2019 PrestaShop and Contributors
 *
 * 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:
 * https://opensource.org/licenses/OSL-3.0
 * 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 https://www.prestashop.com for more information.
 *
 * @author    PrestaShop SA <contact@prestashop.com>
 * @copyright 2007-2019 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * International Registered Trademark & Property of PrestaShop SA
 */
class GroupReductionCore extends ObjectModel
{
    public $id_group;
    public $id_category;
    public $reduction;

/**
     * @see ObjectModel::$definition
     */
    public static $definition = array(
        'table' => 'group_reduction',
        'primary' => 'id_group_reduction',
        'fields' => array(
            'id_group' => array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            'id_category' => array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
            'reduction' => array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice', 'required' => true),
        ),
    );

protected static $reduction_cache = array();

public function add($autodate = true, $null_values = false)
    {
        return parent::add($autodate, $null_values) && $this->_setCache();
    }

public function update($null_values = false)
    {
        return parent::update($null_values) && $this->_updateCache();
    }

public function delete()
    {
        $products = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT cp.`id_product`
			FROM `' . _DB_PREFIX_ . 'category_product` cp
			WHERE cp.`id_category` = ' . (int) $this->id_category
        );

$ids = array();
        foreach ($products as $row) {
            $ids[] = $row['id_product'];
        }

if ($ids) {
            Db::getInstance()->delete('product_group_reduction_cache', 'id_product IN (' . implode(', ', $ids) . ')');
        }

return parent::delete();
    }

protected function _clearCache()
    {
        return Db::getInstance()->delete('product_group_reduction_cache', 'id_group = ' . (int) $this->id_group);
    }

protected function _setCache()
    {
        $products = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT cp.`id_product`
			FROM `' . _DB_PREFIX_ . 'category_product` cp
			WHERE cp.`id_category` = ' . (int) $this->id_category
        );

$values = array();
        foreach ($products as $row) {
            $values[] = '(' . (int) $row['id_product'] . ', ' . (int) $this->id_group . ', ' . (float) $this->reduction . ')';
        }

if (count($values)) {
            $query = 'INSERT INTO `' . _DB_PREFIX_ . 'product_group_reduction_cache` (`id_product`, `id_group`, `reduction`)
			VALUES ' . implode(', ', $values) . ' ON DUPLICATE KEY UPDATE
			`reduction` = IF(VALUES(`reduction`) > `reduction`, VALUES(`reduction`), `reduction`)';

return Db::getInstance()->execute($query);
        }

return true;
    }

protected function _updateCache()
    {
        $products = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT cp.`id_product`
			FROM `' . _DB_PREFIX_ . 'category_product` cp
			WHERE cp.`id_category` = ' . (int) $this->id_category,
        false
        );

$ids = array();
        foreach ($products as $product) {
            $ids[] = $product['id_product'];
        }

$result = true;
        if ($ids) {
            $result &= Db::getInstance()->update('product_group_reduction_cache', array(
                'reduction' => (float) $this->reduction,
            ), 'id_product IN(' . implode(', ', $ids) . ') AND id_group = ' . (int) $this->id_group);
        }

return $result;
    }

public static function getGroupReductions($id_group, $id_lang)
    {
        $lang = $id_lang . Shop::addSqlRestrictionOnLang('cl');

return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT gr.`id_group_reduction`, gr.`id_group`, gr.`id_category`, gr.`reduction`, cl.`name` AS category_name
			FROM `' . _DB_PREFIX_ . 'group_reduction` gr
			LEFT JOIN `' . _DB_PREFIX_ . 'category_lang` cl ON (cl.`id_category` = gr.`id_category` AND cl.`id_lang` = ' . (int) $lang . ')
			WHERE `id_group` = ' . (int) $id_group
        );
    }

public static function getValueForProduct($id_product, $id_group)
    {
        if (!Group::isFeatureActive()) {
            return 0;
        }

if (!isset(self::$reduction_cache[$id_product . '-' . $id_group])) {
            self::$reduction_cache[$id_product . '-' . $id_group] = Db::getInstance()->getValue('
			SELECT `reduction`
			FROM `' . _DB_PREFIX_ . 'product_group_reduction_cache`
			WHERE `id_product` = ' . (int) $id_product . ' AND `id_group` = ' . (int) $id_group);
        }
        // Should return string (decimal in database) and not a float
        return self::$reduction_cache[$id_product . '-' . $id_group];
    }

public static function doesExist($id_group, $id_category)
    {
        return (bool) Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
		SELECT `id_group`
		FROM `' . _DB_PREFIX_ . 'group_reduction`
		WHERE `id_group` = ' . (int) $id_group . ' AND `id_category` = ' . (int) $id_category);
    }

public static function getGroupsByCategoryId($id_category)
    {
        return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT gr.`id_group` as id_group, gr.`reduction` as reduction, id_group_reduction
			FROM `' . _DB_PREFIX_ . 'group_reduction` gr
			WHERE `id_category` = ' . (int) $id_category
        );
    }

/**
     * @deprecated 1.5.3.0
     *
     * @param int $id_category
     *
     * @return array|null
     */
    public static function getGroupByCategoryId($id_category)
    {
        Tools::displayAsDeprecated('Use GroupReduction::getGroupsByCategoryId($id_category)');

return Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow('
			SELECT gr.`id_group` as id_group, gr.`reduction` as reduction, id_group_reduction
			FROM `' . _DB_PREFIX_ . 'group_reduction` gr
			WHERE `id_category` = ' . (int) $id_category, false);
    }

public static function getGroupsReductionByCategoryId($id_category)
    {
        return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT gr.`id_group_reduction` as id_group_reduction, id_group
			FROM `' . _DB_PREFIX_ . 'group_reduction` gr
			WHERE `id_category` = ' . (int) $id_category
        );
    }

/**
     * @deprecated 1.5.3.0
     *
     * @param int $id_category
     *
     * @return array|null
     */
    public static function getGroupReductionByCategoryId($id_category)
    {
        Tools::displayAsDeprecated('Use GroupReduction::getGroupsByCategoryId($id_category)');

return Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow('
			SELECT gr.`id_group_reduction` as id_group_reduction
			FROM `' . _DB_PREFIX_ . 'group_reduction` gr
			WHERE `id_category` = ' . (int) $id_category, false);
    }

public static function setProductReduction($id_product, $id_group = null, $id_category = null, $reduction = null)
    {
        $res = true;
        GroupReduction::deleteProductReduction((int) $id_product);

$categories = Product::getProductCategories((int) $id_product);

if ($categories) {
            foreach ($categories as $category) {
                $reductions = GroupReduction::getGroupsByCategoryId((int) $category);
                if ($reductions) {
                    foreach ($reductions as $reduction) {
                        $current_group_reduction = new GroupReduction((int) $reduction['id_group_reduction']);
                        $res &= $current_group_reduction->_setCache();
                    }
                }
            }
        }

return $res;
    }

public static function deleteProductReduction($id_product)
    {
        $query = 'DELETE FROM `' . _DB_PREFIX_ . 'product_group_reduction_cache` WHERE `id_product` = ' . (int) $id_product;
        if (Db::getInstance()->execute($query) === false) {
            return false;
        }

return true;
    }

public static function duplicateReduction($id_product_old, $id_product)
    {
        $res = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS(
            '
			SELECT pgr.`id_product`, pgr.`id_group`, pgr.`reduction`
			FROM `' . _DB_PREFIX_ . 'product_group_reduction_cache` pgr
			WHERE pgr.`id_product` = ' . (int) $id_product_old
        );

if (!$res) {
            return true;
        }

$query = '';

foreach ($res as $row) {
            $query .= 'INSERT INTO `' . _DB_PREFIX_ . 'product_group_reduction_cache` (`id_product`, `id_group`, `reduction`) VALUES ';
            $query .= '(' . (int) $id_product . ', ' . (int) $row['id_group'] . ', ' . (float) $row['reduction'] . ') ON DUPLICATE KEY UPDATE `reduction` = ' . (float) $row['reduction'] . ';';
        }

return Db::getInstance()->execute($query);
    }

public static function deleteCategory($id_category)
    {
        $query = 'DELETE FROM `' . _DB_PREFIX_ . 'group_reduction` WHERE `id_category` = ' . (int) $id_category;
        if (Db::getInstance()->execute($query) === false) {
            return false;
        }

return true;
    }
}

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