<?php
/*
* 2007-2016 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  2007-2016 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 NotificationCore
{
    public $types;

    public function __construct()
    {
        $this->types = array('order', 'customer_message', 'customer');
    }

    /**
     * getLastElements return all the notifications (new order, new customer registration, and new customer message)
     * Get all the notifications
     *
     * @return array containing the notifications
     */
    public function getLastElements()
    {
        global $cookie;

        $notifications = array();
        $employee_infos = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow('
		SELECT id_last_order, id_last_customer_message, id_last_customer
		FROM `'._DB_PREFIX_.'employee`
		WHERE `id_employee` = '.(int)$cookie->id_employee);

        foreach ($this->types as $type) {
            $notifications[$type] = Notification::getLastElementsIdsByType($type, $employee_infos['id_last_'.$type]);
        }

        return $notifications;
    }

    /**
     * getLastElementsIdsByType return all the element ids to show (order, customer registration, and customer message)
     * Get all the element ids
     *
     * @param string $type contains the field name of the Employee table
     * @param int $id_last_element contains the id of the last seen element
     * @return array containing the notifications
     */
    public static function getLastElementsIdsByType($type, $id_last_element)
    {
        switch ($type) {
            case 'order':
                $sql = '
					SELECT SQL_CALC_FOUND_ROWS o.`id_order`, o.`id_customer`, o.`total_paid`, o.`id_currency`, o.`date_upd`, c.`firstname`, c.`lastname`
					FROM `'._DB_PREFIX_.'orders` as o
					LEFT JOIN `'._DB_PREFIX_.'customer` as c ON (c.`id_customer` = o.`id_customer`)
					WHERE `id_order` > '.(int)$id_last_element.
                    Shop::addSqlRestriction(false, 'o').'
					ORDER BY `id_order` DESC
					LIMIT 5';
                break;

            case 'customer_message':
                $sql = '
					SELECT SQL_CALC_FOUND_ROWS c.`id_customer_message`, ct.`id_customer`, ct.`id_customer_thread`, ct.`email`, c.`date_add` as date_upd
					FROM `'._DB_PREFIX_.'customer_message` as c
					LEFT JOIN `'._DB_PREFIX_.'customer_thread` as ct ON (c.`id_customer_thread` = ct.`id_customer_thread`)
					WHERE c.`id_customer_message` > '.(int)$id_last_element.'
						AND c.`id_employee` = 0
						AND ct.id_shop IN ('.implode(', ', Shop::getContextListShopID()).')
					ORDER BY c.`id_customer_message` DESC
					LIMIT 5';
                break;
            default:
                $sql = '
					SELECT SQL_CALC_FOUND_ROWS t.`id_'.bqSQL($type).'`, t.*
					FROM `'._DB_PREFIX_.bqSQL($type).'` t
					WHERE t.`deleted` = 0 AND t.`id_'.bqSQL($type).'` > '.(int)$id_last_element.
                    Shop::addSqlRestriction(false, 't').'
					ORDER BY t.`id_'.bqSQL($type).'` DESC
					LIMIT 5';
                break;
        }

        $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($sql, true, false);
        $total = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('SELECT FOUND_ROWS()', false);
        $json = array('total' => $total, 'results' => array());
        foreach ($result as $value) {
            $customer_name = '';
            if (isset($value['firstname']) && isset($value['lastname'])) {
                $customer_name = Tools::safeOutput($value['firstname'].' '.$value['lastname']);
            } elseif (isset($value['email'])) {
                $customer_name = Tools::safeOutput($value['email']);
            }

            $json['results'][] = array(
                'id_order' => ((!empty($value['id_order'])) ? (int)$value['id_order'] : 0),
                'id_customer' => ((!empty($value['id_customer'])) ? (int)$value['id_customer'] : 0),
                'id_customer_message' => ((!empty($value['id_customer_message'])) ? (int)$value['id_customer_message'] : 0),
                'id_customer_thread' => ((!empty($value['id_customer_thread'])) ? (int)$value['id_customer_thread'] : 0),
                'total_paid' => ((!empty($value['total_paid'])) ? Tools::displayPrice((float)$value['total_paid'], (int)$value['id_currency'], false) : 0),
                'customer_name' => $customer_name,
                // x1000 because of moment.js (see: http://momentjs.com/docs/#/parsing/unix-timestamp/)
                'update_date' => isset($value['date_upd']) ? (int)strtotime($value['date_upd']) * 1000 : 0,
            );
        }

        return $json;
    }

    /**
     * updateEmployeeLastElement return 0 if the field doesn't exists in Employee table.
     * Updates the last seen element by the employee
     *
     * @param string $type contains the field name of the Employee table
     * @return bool if type exists or not
     */
    public function updateEmployeeLastElement($type)
    {
        global $cookie;

        if (in_array($type, $this->types)) {
            // We update the last item viewed
            return Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'employee`
			SET `id_last_'.bqSQL($type).'` = (
				SELECT IFNULL(MAX(`id_'.$type.'`), 0)
				FROM `'._DB_PREFIX_.(($type == 'order') ? bqSQL($type).'s' : bqSQL($type)).'`
			)
			WHERE `id_employee` = '.(int)$cookie->id_employee);
        }
        return false;
    }
}
