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Filename : Carrier.php
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<?php
/*
* 2007-2017 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  2007-2017 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 CarrierCore extends ObjectModel
{
    /**
     * getCarriers method filter
     */
    const PS_CARRIERS_ONLY = 1;
    const CARRIERS_MODULE = 2;
    const CARRIERS_MODULE_NEED_RANGE = 3;
    const PS_CARRIERS_AND_CARRIER_MODULES_NEED_RANGE = 4;
    const ALL_CARRIERS = 5;

    const SHIPPING_METHOD_DEFAULT = 0;
    const SHIPPING_METHOD_WEIGHT = 1;
    const SHIPPING_METHOD_PRICE = 2;
    const SHIPPING_METHOD_FREE = 3;

    const SHIPPING_PRICE_EXCEPTION = 0;
    const SHIPPING_WEIGHT_EXCEPTION = 1;
    const SHIPPING_SIZE_EXCEPTION = 2;

    const SORT_BY_PRICE = 0;
    const SORT_BY_POSITION = 1;

    const SORT_BY_ASC = 0;
    const SORT_BY_DESC = 1;

    /** @var int common id for carrier historization */
    public $id_reference;

    /** @var string Name */
    public $name;

    /** @var string URL with a '@' for */
    public $url;

    /** @var string Delay needed to deliver customer */
    public $delay;

    /** @var bool Carrier statuts */
    public $active = true;

    /** @var bool True if carrier has been deleted (staying in database as deleted) */
    public $deleted = 0;

    /** @var bool Active or not the shipping handling */
    public $shipping_handling = true;

    /** @var int Behavior taken for unknown range */
    public $range_behavior;

    /** @var bool Carrier module */
    public $is_module;

    /** @var bool Free carrier */
    public $is_free = false;

    /** @var int shipping behavior: by weight or by price */
    public $shipping_method = 0;

    /** @var bool Shipping external */
    public $shipping_external = 0;

    /** @var string Shipping external */
    public $external_module_name = null;

    /** @var bool Need Range */
    public $need_range = 0;

    /** @var int Position */
    public $position;

    /** @var int maximum package width managed by the transporter */
    public $max_width;

    /** @var int maximum package height managed by the transporter */
    public $max_height;

    /** @var int maximum package deep managed by the transporter */
    public $max_depth;

    /** @var int maximum package weight managed by the transporter */
    public $max_weight;

    /** @var int grade of the shipping delay (0 for longest, 9 for shortest) */
    public $grade;

    /**
     * @see ObjectModel::$definition
     */
    public static $definition = array(
        'table' => 'carrier',
        'primary' => 'id_carrier',
        'multilang' => true,
        'multilang_shop' => true,
        'fields' => array(
            /* Classic fields */
            'id_reference' =>            array('type' => self::TYPE_INT),
            'name' =>                    array('type' => self::TYPE_STRING, 'validate' => 'isCarrierName', 'required' => true, 'size' => 64),
            'active' =>                array('type' => self::TYPE_BOOL, 'validate' => 'isBool', 'required' => true),
            'is_free' =>                array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
            'url' =>                    array('type' => self::TYPE_STRING, 'validate' => 'isAbsoluteUrl'),
            'shipping_handling' =>        array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
            'shipping_external' =>        array('type' => self::TYPE_BOOL),
            'range_behavior' =>        array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
            'shipping_method' =>        array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'),
            'max_width' =>                array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'),
            'max_height' =>            array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'),
            'max_depth' =>                array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt'),
            'max_weight' =>            array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat'),
            'grade' =>                    array('type' => self::TYPE_INT, 'validate' => 'isUnsignedInt', 'size' => 1),
            'external_module_name' =>    array('type' => self::TYPE_STRING, 'size' => 64),
            'is_module' =>                array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
            'need_range' =>            array('type' => self::TYPE_BOOL),
            'position' =>                array('type' => self::TYPE_INT),
            'deleted' =>                array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),

            /* Lang fields */
            'delay' =>                    array('type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'required' => true, 'size' => 512),
        ),
    );

    protected static $price_by_weight = array();
    protected static $price_by_weight2 = array();
    protected static $price_by_price = array();
    protected static $price_by_price2 = array();

    protected static $cache_tax_rule = array();

    protected $webserviceParameters = array(
        'fields' => array(
            'deleted' => array(),
            'is_module' => array(),
            'id_tax_rules_group' => array(
                'getter' => 'getIdTaxRulesGroup',
                'setter' => 'setTaxRulesGroup',
                'xlink_resource' => array(
                    'resourceName' => 'tax_rule_groups'
                )
            ),
        ),
    );

    public function __construct($id = null, $id_lang = null)
    {
        parent::__construct($id, $id_lang);

        /**
         * keep retrocompatibility SHIPPING_METHOD_DEFAULT
         * @deprecated 1.5.5
         */
        if ($this->shipping_method == Carrier::SHIPPING_METHOD_DEFAULT) {
            $this->shipping_method = ((int)Configuration::get('PS_SHIPPING_METHOD') ? Carrier::SHIPPING_METHOD_WEIGHT : Carrier::SHIPPING_METHOD_PRICE);
        }

        /**
         * keep retrocompatibility id_tax_rules_group
         * @deprecated 1.5.0
         */
        if ($this->id) {
            $this->id_tax_rules_group = $this->getIdTaxRulesGroup(Context::getContext());
        }

        if ($this->name == '0') {
            $this->name = Carrier::getCarrierNameFromShopName();
        }

        $this->image_dir = _PS_SHIP_IMG_DIR_;
    }

    public function add($autodate = true, $null_values = false)
    {
        if ($this->position <= 0) {
            $this->position = Carrier::getHigherPosition() + 1;
        }
        if (!parent::add($autodate, $null_values) || !Validate::isLoadedObject($this)) {
            return false;
        }
        if (!$count = Db::getInstance()->getValue('SELECT count(`id_carrier`) FROM `'._DB_PREFIX_.$this->def['table'].'` WHERE `deleted` = 0')) {
            return false;
        }
        if ($count == 1) {
            Configuration::updateValue('PS_CARRIER_DEFAULT', (int)$this->id);
        }

        // Register reference
        Db::getInstance()->execute('UPDATE `'._DB_PREFIX_.$this->def['table'].'` SET `id_reference` = '.$this->id.' WHERE `id_carrier` = '.$this->id);

        return true;
    }

    /**
     * @since 1.5.0
     * @see ObjectModel::delete()
     */
    public function delete()
    {
        if (!parent::delete()) {
            return false;
        }
        Carrier::cleanPositions();
        return (Db::getInstance()->execute('DELETE FROM '._DB_PREFIX_.'cart_rule_carrier WHERE id_carrier = '.(int)$this->id) &&
                    $this->deleteTaxRulesGroup(Shop::getShops(true, null, true)));
    }

    /**
    * Change carrier id in delivery prices when updating a carrier
    *
    * @param int $id_old Old id carrier
    */
    public function setConfiguration($id_old)
    {
        Db::getInstance()->execute('UPDATE `'._DB_PREFIX_.'delivery` SET `id_carrier` = '.(int)$this->id.' WHERE `id_carrier` = '.(int)$id_old);
    }

    /**
     * Get delivery prices for a given order
     *
     * @param float $total_weight Total order weight
     * @param int $id_zone Zone ID (for customer delivery address)
     * @return float Delivery price
     */
    public function getDeliveryPriceByWeight($total_weight, $id_zone)
    {
        $id_carrier = (int)$this->id;
        $cache_key = $id_carrier.'_'.$total_weight.'_'.$id_zone;
        if (!isset(self::$price_by_weight[$cache_key])) {
            $sql = 'SELECT d.`price`
					FROM `'._DB_PREFIX_.'delivery` d
					LEFT JOIN `'._DB_PREFIX_.'range_weight` w ON (d.`id_range_weight` = w.`id_range_weight`)
					WHERE d.`id_zone` = '.(int)$id_zone.'
						AND '.(float)$total_weight.' >= w.`delimiter1`
						AND '.(float)$total_weight.' < w.`delimiter2`
						AND d.`id_carrier` = '.$id_carrier.'
						'.Carrier::sqlDeliveryRangeShop('range_weight').'
					ORDER BY w.`delimiter1` ASC';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow($sql);
            if (!isset($result['price'])) {
                self::$price_by_weight[$cache_key] = $this->getMaxDeliveryPriceByWeight($id_zone);
            } else {
                self::$price_by_weight[$cache_key] = $result['price'];
            }
        }

        $price_by_weight = Hook::exec('actionDeliveryPriceByWeight', array('id_carrier' => $id_carrier, 'total_weight' => $total_weight, 'id_zone' => $id_zone));
        if (is_numeric($price_by_weight)) {
            self::$price_by_weight[$cache_key] = $price_by_weight;
        }

        return self::$price_by_weight[$cache_key];
    }

    public static function checkDeliveryPriceByWeight($id_carrier, $total_weight, $id_zone)
    {
        $id_carrier = (int)$id_carrier;
        $cache_key = $id_carrier.'_'.$total_weight.'_'.$id_zone;
        if (!isset(self::$price_by_weight2[$cache_key])) {
            $sql = 'SELECT d.`price`
					FROM `'._DB_PREFIX_.'delivery` d
					LEFT JOIN `'._DB_PREFIX_.'range_weight` w ON d.`id_range_weight` = w.`id_range_weight`
					WHERE d.`id_zone` = '.(int)$id_zone.'
						AND '.(float)$total_weight.' >= w.`delimiter1`
						AND '.(float)$total_weight.' < w.`delimiter2`
						AND d.`id_carrier` = '.$id_carrier.'
						'.Carrier::sqlDeliveryRangeShop('range_weight').'
					ORDER BY w.`delimiter1` ASC';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow($sql);
            self::$price_by_weight2[$cache_key] = (isset($result['price']));
        }

        $price_by_weight = Hook::exec('actionDeliveryPriceByWeight', array('id_carrier' => $id_carrier, 'total_weight' => $total_weight, 'id_zone' => $id_zone));
        if (is_numeric($price_by_weight)) {
            self::$price_by_weight2[$cache_key] = $price_by_weight;
        }

        return self::$price_by_weight2[$cache_key];
    }

    public function getMaxDeliveryPriceByWeight($id_zone)
    {
        $cache_id = 'Carrier::getMaxDeliveryPriceByWeight_'.(int)$this->id.'-'.(int)$id_zone;
        if (!Cache::isStored($cache_id)) {
            $sql = 'SELECT d.`price`
					FROM `'._DB_PREFIX_.'delivery` d
					INNER JOIN `'._DB_PREFIX_.'range_weight` w ON d.`id_range_weight` = w.`id_range_weight`
					WHERE d.`id_zone` = '.(int)$id_zone.'
						AND d.`id_carrier` = '.(int)$this->id.'
						'.Carrier::sqlDeliveryRangeShop('range_weight').'
					ORDER BY w.`delimiter2` DESC';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($sql);
            Cache::store($cache_id, $result);
            return $result;
        }
        return Cache::retrieve($cache_id);
    }

    /**
     * Get delivery prices for a given order
     *
     * @param float $order_total Order total to pay
     * @param int $id_zone Zone id (for customer delivery address)
     * @param int|null $id_currency
     * @return float Delivery price
     */
    public function getDeliveryPriceByPrice($order_total, $id_zone, $id_currency = null)
    {
        $id_carrier = (int)$this->id;
        $cache_key = $this->id.'_'.$order_total.'_'.$id_zone.'_'.$id_currency;
        if (!isset(self::$price_by_price[$cache_key])) {
            if (!empty($id_currency)) {
                $order_total = Tools::convertPrice($order_total, $id_currency, false);
            }

            $sql = 'SELECT d.`price`
					FROM `'._DB_PREFIX_.'delivery` d
					LEFT JOIN `'._DB_PREFIX_.'range_price` r ON d.`id_range_price` = r.`id_range_price`
					WHERE d.`id_zone` = '.(int)$id_zone.'
						AND '.(float)$order_total.' >= r.`delimiter1`
						AND '.(float)$order_total.' < r.`delimiter2`
						AND d.`id_carrier` = '.$id_carrier.'
						'.Carrier::sqlDeliveryRangeShop('range_price').'
					ORDER BY r.`delimiter1` ASC';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow($sql);
            if (!isset($result['price'])) {
                self::$price_by_price[$cache_key] = $this->getMaxDeliveryPriceByPrice($id_zone);
            } else {
                self::$price_by_price[$cache_key] = $result['price'];
            }
        }

        $price_by_price = Hook::exec('actionDeliveryPriceByPrice', array('id_carrier' => $id_carrier, 'order_total' => $order_total, 'id_zone' => $id_zone));
        if (is_numeric($price_by_price)) {
            self::$price_by_price[$cache_key] = $price_by_price;
        }

        return self::$price_by_price[$cache_key];
    }

    /**
     * Check delivery prices for a given order
     *
     * @param int $id_carrier
     * @param float $order_total Order total to pay
     * @param int $id_zone Zone id (for customer delivery address)
     * @param int|null $id_currency
     * @return float Delivery price
     */
    public static function checkDeliveryPriceByPrice($id_carrier, $order_total, $id_zone, $id_currency = null)
    {
        $id_carrier = (int)$id_carrier;
        $cache_key = $id_carrier.'_'.$order_total.'_'.$id_zone.'_'.$id_currency;
        if (!isset(self::$price_by_price2[$cache_key])) {
            if (!empty($id_currency)) {
                $order_total = Tools::convertPrice($order_total, $id_currency, false);
            }

            $sql = 'SELECT d.`price`
					FROM `'._DB_PREFIX_.'delivery` d
					LEFT JOIN `'._DB_PREFIX_.'range_price` r ON d.`id_range_price` = r.`id_range_price`
					WHERE d.`id_zone` = '.(int)$id_zone.'
						AND '.(float)$order_total.' >= r.`delimiter1`
						AND '.(float)$order_total.' < r.`delimiter2`
						AND d.`id_carrier` = '.$id_carrier.'
						'.Carrier::sqlDeliveryRangeShop('range_price').'
					ORDER BY r.`delimiter1` ASC';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow($sql);
            self::$price_by_price2[$cache_key] = (isset($result['price']));
        }

        $price_by_price = Hook::exec('actionDeliveryPriceByPrice', array('id_carrier' => $id_carrier, 'order_total' => $order_total, 'id_zone' => $id_zone));
        if (is_numeric($price_by_price)) {
            self::$price_by_price2[$cache_key] = $price_by_price;
        }

        return self::$price_by_price2[$cache_key];
    }

    public function getMaxDeliveryPriceByPrice($id_zone)
    {
        $cache_id = 'Carrier::getMaxDeliveryPriceByPrice_'.(int)$this->id.'-'.(int)$id_zone;
        if (!Cache::isStored($cache_id)) {
            $sql = 'SELECT d.`price`
					FROM `'._DB_PREFIX_.'delivery` d
					INNER JOIN `'._DB_PREFIX_.'range_price` r ON d.`id_range_price` = r.`id_range_price`
					WHERE d.`id_zone` = '.(int)$id_zone.'
						AND d.`id_carrier` = '.(int)$this->id.'
						'.Carrier::sqlDeliveryRangeShop('range_price').'
					ORDER BY r.`delimiter2` DESC';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($sql);
            Cache::store($cache_id, $result);
        }
        return Cache::retrieve($cache_id);
    }

    /**
     * Get delivery prices for a given shipping method (price/weight)
     *
     * @param string $rangeTable Table name (price or weight)
     * @return array Delivery prices
     */
    public static function getDeliveryPriceByRanges($range_table, $id_carrier)
    {
        $sql = 'SELECT d.`id_'.bqSQL($range_table).'`, d.id_carrier, d.id_zone, d.price
				FROM '._DB_PREFIX_.'delivery d
				LEFT JOIN `'._DB_PREFIX_.bqSQL($range_table).'` r ON r.`id_'.bqSQL($range_table).'` = d.`id_'.bqSQL($range_table).'`
				WHERE d.id_carrier = '.(int)$id_carrier.'
					AND d.`id_'.bqSQL($range_table).'` IS NOT NULL
					AND d.`id_'.bqSQL($range_table).'` != 0
					'.Carrier::sqlDeliveryRangeShop($range_table).'
				ORDER BY r.delimiter1';
        return Db::getInstance()->executeS($sql);
    }

    /**
     * Get all carriers in a given language
     *
     * @param int $id_lang Language id
     * @param $modules_filters, possible values:
            PS_CARRIERS_ONLY
            CARRIERS_MODULE
            CARRIERS_MODULE_NEED_RANGE
            PS_CARRIERS_AND_CARRIER_MODULES_NEED_RANGE
            ALL_CARRIERS
     * @param bool $active Returns only active carriers when true
     * @return array Carriers
     */
    public static function getCarriers($id_lang, $active = false, $delete = false, $id_zone = false, $ids_group = null, $modules_filters = self::PS_CARRIERS_ONLY)
    {
        // Filter by groups and no groups => return empty array
        if ($ids_group && (!is_array($ids_group) || !count($ids_group))) {
            return array();
        }

        $sql = '
		SELECT c.*, cl.delay
		FROM `'._DB_PREFIX_.'carrier` c
		LEFT JOIN `'._DB_PREFIX_.'carrier_lang` cl ON (c.`id_carrier` = cl.`id_carrier` AND cl.`id_lang` = '.(int)$id_lang.Shop::addSqlRestrictionOnLang('cl').')
		LEFT JOIN `'._DB_PREFIX_.'carrier_zone` cz ON (cz.`id_carrier` = c.`id_carrier`)'.
        ($id_zone ? 'LEFT JOIN `'._DB_PREFIX_.'zone` z ON (z.`id_zone` = '.(int)$id_zone.')' : '').'
		'.Shop::addSqlAssociation('carrier', 'c').'
		WHERE c.`deleted` = '.($delete ? '1' : '0');
        if ($active) {
            $sql .= ' AND c.`active` = 1 ';
        }
        if ($id_zone) {
            $sql .= ' AND cz.`id_zone` = '.(int)$id_zone.' AND z.`active` = 1 ';
        }
        if ($ids_group) {
            $sql .= ' AND EXISTS (SELECT 1 FROM '._DB_PREFIX_.'carrier_group
									WHERE '._DB_PREFIX_.'carrier_group.id_carrier = c.id_carrier
									AND id_group IN ('.implode(',', array_map('intval', $ids_group)).')) ';
        }

        switch ($modules_filters) {
            case 1 :
                $sql .= ' AND c.is_module = 0 ';
                break;
            case 2 :
                $sql .= ' AND c.is_module = 1 ';
                break;
            case 3 :
                $sql .= ' AND c.is_module = 1 AND c.need_range = 1 ';
                break;
            case 4 :
                $sql .= ' AND (c.is_module = 0 OR c.need_range = 1) ';
                break;
        }
        $sql .= ' GROUP BY c.`id_carrier` ORDER BY c.`position` ASC';

        $cache_id = 'Carrier::getCarriers_'.md5($sql);
        if (!Cache::isStored($cache_id)) {
            $carriers = Db::getInstance()->executeS($sql);
            Cache::store($cache_id, $carriers);
        } else {
            $carriers = Cache::retrieve($cache_id);
        }

        foreach ($carriers as $key => $carrier) {
            if ($carrier['name'] == '0') {
                $carriers[$key]['name'] = Carrier::getCarrierNameFromShopName();
            }
        }
        return $carriers;
    }

    public static function getIdTaxRulesGroupMostUsed()
    {
        return Db::getInstance()->getValue('
					SELECT id_tax_rules_group
					FROM (
						SELECT COUNT(*) n, c.id_tax_rules_group
						FROM '._DB_PREFIX_.'carrier c
						JOIN '._DB_PREFIX_.'tax_rules_group trg ON (c.id_tax_rules_group = trg.id_tax_rules_group)
						WHERE trg.active = 1 AND trg.deleted = 0
						GROUP BY c.id_tax_rules_group
						ORDER BY n DESC
						LIMIT 1
					) most_used'
                );
    }

    public static function getDeliveredCountries($id_lang, $active_countries = false, $active_carriers = false, $contain_states = null)
    {
        if (!Validate::isBool($active_countries) || !Validate::isBool($active_carriers)) {
            die(Tools::displayError());
        }

        $states = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
		SELECT s.*
		FROM `'._DB_PREFIX_.'state` s
		ORDER BY s.`name` ASC');

        $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
			SELECT cl.*,c.*, cl.`name` AS country, zz.`name` AS zone
			FROM `'._DB_PREFIX_.'country` c'.
            Shop::addSqlAssociation('country', 'c').'
			LEFT JOIN `'._DB_PREFIX_.'country_lang` cl ON (c.`id_country` = cl.`id_country` AND cl.`id_lang` = '.(int)$id_lang.')
			INNER JOIN (`'._DB_PREFIX_.'carrier_zone` cz INNER JOIN `'._DB_PREFIX_.'carrier` cr ON ( cr.id_carrier = cz.id_carrier AND cr.deleted = 0 '.
            ($active_carriers ? 'AND cr.active = 1) ' : ') ').'
			LEFT JOIN `'._DB_PREFIX_.'zone` zz ON cz.id_zone = zz.id_zone) ON zz.`id_zone` = c.`id_zone`
			WHERE 1
			'.($active_countries ? 'AND c.active = 1' : '').'
			'.(!is_null($contain_states) ? 'AND c.`contains_states` = '.(int)$contain_states : '').'
			ORDER BY cl.name ASC');

        $countries = array();
        foreach ($result as &$country) {
            $countries[$country['id_country']] = $country;
        }
        foreach ($states as &$state) {
            if (isset($countries[$state['id_country']])) { /* Does not keep the state if its country has been disabled and not selected */
                if ($state['active'] == 1) {
                    $countries[$state['id_country']]['states'][] = $state;
                }
            }
        }

        return $countries;
    }

    /**
     * Return the default carrier to use
     *
     * @param array $carriers
     * @param array $defaultCarrier the last carrier selected
     * @return number the id of the default carrier
     */
    public static function getDefaultCarrierSelection($carriers, $default_carrier = 0)
    {
        if (empty($carriers)) {
            return 0;
        }

        if ((int)$default_carrier != 0) {
            foreach ($carriers as $carrier) {
                if ($carrier['id_carrier'] == (int)$default_carrier) {
                    return (int)$carrier['id_carrier'];
                }
            }
        }
        foreach ($carriers as $carrier) {
            if ($carrier['id_carrier'] == (int)Configuration::get('PS_CARRIER_DEFAULT')) {
                return (int)$carrier['id_carrier'];
            }
        }

        return (int)$carriers[0]['id_carrier'];
    }

    /**
     *
     * @param int $id_zone
     * @param Array $groups group of the customer
     * @param array &$error contain an error message if an error occurs
     * @return Array
     */
    public static function getCarriersForOrder($id_zone, $groups = null, $cart = null, &$error = array())
    {
        $context = Context::getContext();
        $id_lang = $context->language->id;
        if (is_null($cart)) {
            $cart = $context->cart;
        }
        if (isset($context->currency)) {
            $id_currency = $context->currency->id;
        }

        if (is_array($groups) && !empty($groups)) {
            $result = Carrier::getCarriers($id_lang, true, false, (int)$id_zone, $groups, self::PS_CARRIERS_AND_CARRIER_MODULES_NEED_RANGE);
        } else {
            $result = Carrier::getCarriers($id_lang, true, false, (int)$id_zone, array(Configuration::get('PS_UNIDENTIFIED_GROUP')), self::PS_CARRIERS_AND_CARRIER_MODULES_NEED_RANGE);
        }
        $results_array = array();

        foreach ($result as $k => $row) {
            $carrier = new Carrier((int)$row['id_carrier']);
            $shipping_method = $carrier->getShippingMethod();
            if ($shipping_method != Carrier::SHIPPING_METHOD_FREE) {
                // Get only carriers that are compliant with shipping method
                if (($shipping_method == Carrier::SHIPPING_METHOD_WEIGHT && $carrier->getMaxDeliveryPriceByWeight($id_zone) === false)) {
                    $error[$carrier->id] = Carrier::SHIPPING_WEIGHT_EXCEPTION;
                    unset($result[$k]);
                    continue;
                }
                if (($shipping_method == Carrier::SHIPPING_METHOD_PRICE && $carrier->getMaxDeliveryPriceByPrice($id_zone) === false)) {
                    $error[$carrier->id] = Carrier::SHIPPING_PRICE_EXCEPTION;
                    unset($result[$k]);
                    continue;
                }

                // If out-of-range behavior carrier is set on "Desactivate carrier"
                if ($row['range_behavior']) {
                    // Get id zone
                    if (!$id_zone) {
                        $id_zone = (int)Country::getIdZone(Country::getDefaultCountryId());
                    }

                    // Get only carriers that have a range compatible with cart
                    if ($shipping_method == Carrier::SHIPPING_METHOD_WEIGHT
                        && (!Carrier::checkDeliveryPriceByWeight($row['id_carrier'], $cart->getTotalWeight(), $id_zone))) {
                        $error[$carrier->id] = Carrier::SHIPPING_WEIGHT_EXCEPTION;
                        unset($result[$k]);
                        continue;
                    }

                    if ($shipping_method == Carrier::SHIPPING_METHOD_PRICE
                        && (!Carrier::checkDeliveryPriceByPrice($row['id_carrier'], $cart->getOrderTotal(true, Cart::BOTH_WITHOUT_SHIPPING), $id_zone, $id_currency))) {
                        $error[$carrier->id] = Carrier::SHIPPING_PRICE_EXCEPTION;
                        unset($result[$k]);
                        continue;
                    }
                }
            }

            $row['name'] = (strval($row['name']) != '0' ? $row['name'] : Carrier::getCarrierNameFromShopName());
            $row['price'] = (($shipping_method == Carrier::SHIPPING_METHOD_FREE) ? 0 : $cart->getPackageShippingCost((int)$row['id_carrier'], true, null, null, $id_zone));
            $row['price_tax_exc'] = (($shipping_method == Carrier::SHIPPING_METHOD_FREE) ? 0 : $cart->getPackageShippingCost((int)$row['id_carrier'], false, null, null, $id_zone));
            $row['img'] = file_exists(_PS_SHIP_IMG_DIR_.(int)$row['id_carrier'].'.jpg') ? _THEME_SHIP_DIR_.(int)$row['id_carrier'].'.jpg' : '';

            // If price is false, then the carrier is unavailable (carrier module)
            if ($row['price'] === false) {
                unset($result[$k]);
                continue;
            }
            $results_array[] = $row;
        }

        // if we have to sort carriers by price
        $prices = array();
        if (Configuration::get('PS_CARRIER_DEFAULT_SORT') == Carrier::SORT_BY_PRICE) {
            foreach ($results_array as $r) {
                $prices[] = $r['price'];
            }
            if (Configuration::get('PS_CARRIER_DEFAULT_ORDER') == Carrier::SORT_BY_ASC) {
                array_multisort($prices, SORT_ASC, SORT_NUMERIC, $results_array);
            } else {
                array_multisort($prices, SORT_DESC, SORT_NUMERIC, $results_array);
            }
        }

        return $results_array;
    }

    public static function checkCarrierZone($id_carrier, $id_zone)
    {
        $cache_id = 'Carrier::checkCarrierZone_'.(int)$id_carrier.'-'.(int)$id_zone;
        if (!Cache::isStored($cache_id)) {
            $sql = 'SELECT c.`id_carrier`
						FROM `'._DB_PREFIX_.'carrier` c
						LEFT JOIN `'._DB_PREFIX_.'carrier_zone` cz ON (cz.`id_carrier` = c.`id_carrier`)
						LEFT JOIN `'._DB_PREFIX_.'zone` z ON (z.`id_zone` = '.(int)$id_zone.')
						WHERE c.`id_carrier` = '.(int)$id_carrier.'
						AND c.`deleted` = 0
						AND c.`active` = 1
						AND cz.`id_zone` = '.(int)$id_zone.'
						AND z.`active` = 1';
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($sql);
            Cache::store($cache_id, $result);
        }
        return Cache::retrieve($cache_id);
    }

    /**
     * Get all zones
     *
     * @return array Zones
     */
    public function getZones()
    {
        return Db::getInstance()->executeS('
			SELECT *
			FROM `'._DB_PREFIX_.'carrier_zone` cz
			LEFT JOIN `'._DB_PREFIX_.'zone` z ON cz.`id_zone` = z.`id_zone`
			WHERE cz.`id_carrier` = '.(int)$this->id);
    }

    /**
     * Get a specific zones
     *
     * @return array Zone
     */
    public function getZone($id_zone)
    {
        return Db::getInstance()->executeS('
			SELECT *
			FROM `'._DB_PREFIX_.'carrier_zone`
			WHERE `id_carrier` = '.(int)$this->id.'
			AND `id_zone` = '.(int)$id_zone);
    }

    /**
     * Add zone
     */
    public function addZone($id_zone)
    {
        if (Db::getInstance()->execute('
			INSERT INTO `'._DB_PREFIX_.'carrier_zone` (`id_carrier` , `id_zone`)
			VALUES ('.(int)$this->id.', '.(int)$id_zone.')
		')) {
            // Get all ranges for this carrier
            $ranges_price = RangePrice::getRanges($this->id);
            $ranges_weight = RangeWeight::getRanges($this->id);
            // Create row in ps_delivery table
            if (count($ranges_price) || count($ranges_weight)) {
                $sql = 'INSERT INTO `'._DB_PREFIX_.'delivery` (`id_carrier`, `id_range_price`, `id_range_weight`, `id_zone`, `price`) VALUES ';
                if (count($ranges_price)) {
                    foreach ($ranges_price as $range) {
                        $sql .= '('.(int)$this->id.', '.(int)$range['id_range_price'].', 0, '.(int)$id_zone.', 0),';
                    }
                }

                if (count($ranges_weight)) {
                    foreach ($ranges_weight as $range) {
                        $sql .= '('.(int)$this->id.', 0, '.(int)$range['id_range_weight'].', '.(int)$id_zone.', 0),';
                    }
                }
                $sql = rtrim($sql, ',');

                return Db::getInstance()->execute($sql);
            }
            return true;
        }
        return false;
    }

    /**
     * Delete zone
     */
    public function deleteZone($id_zone)
    {
        if (Db::getInstance()->execute('
			DELETE FROM `'._DB_PREFIX_.'carrier_zone`
			WHERE `id_carrier` = '.(int)$this->id.'
			AND `id_zone` = '.(int)$id_zone.' LIMIT 1
		')) {
            return Db::getInstance()->execute('
				DELETE FROM `'._DB_PREFIX_.'delivery`
				WHERE `id_carrier` = '.(int)$this->id.'
				AND `id_zone` = '.(int)$id_zone);
        }
        return false;
    }

    /**
     * Gets a specific group
     *
     * @since 1.5.0
     * @return array Group
     */
    public function getGroups()
    {
        return Db::getInstance()->executeS('
			SELECT id_group
			FROM '._DB_PREFIX_.'carrier_group
			WHERE id_carrier='.(int)$this->id);
    }

    /**
     * Clean delivery prices (weight/price)
     *
     * @param string $rangeTable Table name to clean (weight or price according to shipping method)
     * @return bool Deletion result
     */
    public function deleteDeliveryPrice($range_table)
    {
        $where = '`id_carrier` = '.(int)$this->id.' AND (`id_'.bqSQL($range_table).'` IS NOT NULL OR `id_'.bqSQL($range_table).'` = 0) ';

        if (Shop::getContext() == Shop::CONTEXT_ALL) {
            $where .= 'AND id_shop IS NULL AND id_shop_group IS NULL';
        } elseif (Shop::getContext() == Shop::CONTEXT_GROUP) {
            $where .= 'AND id_shop IS NULL AND id_shop_group = '.(int)Shop::getContextShopGroupID();
        } else {
            $where .= 'AND id_shop = '.(int)Shop::getContextShopID();
        }

        return Db::getInstance()->delete('delivery', $where);
    }

    /**
     * Add new delivery prices
     *
     * @param array $priceList Prices list in multiple arrays (changed to array since 1.5.0)
     * @return bool Insertion result
     */
    public function addDeliveryPrice($price_list, $delete = false)
    {
        if (!$price_list) {
            return false;
        }

        $keys = array_keys($price_list[0]);
        if (!in_array('id_shop', $keys)) {
            $keys[] = 'id_shop';
        }
        if (!in_array('id_shop_group', $keys)) {
            $keys[] = 'id_shop_group';
        }

        $sql = 'INSERT INTO `'._DB_PREFIX_.'delivery` ('.implode(', ', $keys).') VALUES ';
        foreach ($price_list as $values) {
            if (!isset($values['id_shop'])) {
                $values['id_shop'] = (Shop::getContext() == Shop::CONTEXT_SHOP) ? Shop::getContextShopID() : null;
            }
            if (!isset($values['id_shop_group'])) {
                $values['id_shop_group'] = (Shop::getContext() != Shop::CONTEXT_ALL) ? Shop::getContextShopGroupID() : null;
            }

            if ($delete) {
                Db::getInstance()->execute(
                    'DELETE FROM `'._DB_PREFIX_.'delivery`
                    WHERE '.(is_null($values['id_shop']) ? 'ISNULL(`id_shop`) ' : 'id_shop = '.(int)$values['id_shop']).'
                    AND '.(is_null($values['id_shop_group']) ? 'ISNULL(`id_shop`) ' : 'id_shop_group='.(int)$values['id_shop_group']).'
                    AND id_carrier='.(int)$values['id_carrier'].
                    ($values['id_range_price'] !== null ? ' AND id_range_price='.(int)$values['id_range_price'] : ' AND (ISNULL(`id_range_price`) OR `id_range_price` = 0)').
                    ($values['id_range_weight'] !== null ? ' AND id_range_weight='.(int)$values['id_range_weight'] : ' AND (ISNULL(`id_range_weight`) OR `id_range_weight` = 0)').'
					AND id_zone='.(int)$values['id_zone']
                );
            }

            $sql .= '(';
            foreach ($values as $v) {
                if (is_null($v)) {
                    $sql .= 'NULL';
                } elseif (is_int($v) || is_float($v)) {
                    $sql .= $v;
                } else {
                    $sql .= '\''.$v.'\'';
                }
                $sql .= ', ';
            }
            $sql = rtrim($sql, ', ').'), ';
        }
        $sql = rtrim($sql, ', ');
        return Db::getInstance()->execute($sql);
    }

    /**
     * Copy old carrier informations when update carrier
     *
     * @param int $oldId Old id carrier (copy from that id)
     */
    public function copyCarrierData($old_id)
    {
        if (!Validate::isUnsignedId($old_id)) {
            throw new PrestaShopException('Incorrect identifier for carrier');
        }

        if (!$this->id) {
            return false;
        }

        $old_logo = _PS_SHIP_IMG_DIR_.'/'.(int)$old_id.'.jpg';
        if (file_exists($old_logo)) {
            copy($old_logo, _PS_SHIP_IMG_DIR_.'/'.(int)$this->id.'.jpg');
        }

        $old_tmp_logo = _PS_TMP_IMG_DIR_.'/carrier_mini_'.(int)$old_id.'.jpg';
        if (file_exists($old_tmp_logo)) {
            if (!isset($_FILES['logo'])) {
                copy($old_tmp_logo, _PS_TMP_IMG_DIR_.'/carrier_mini_'.$this->id.'.jpg');
            }
            unlink($old_tmp_logo);
        }

        // Copy existing ranges price
        foreach (array('range_price', 'range_weight') as $range) {
            $res = Db::getInstance()->executeS('
				SELECT `id_'.$range.'` as id_range, `delimiter1`, `delimiter2`
				FROM `'._DB_PREFIX_.$range.'`
				WHERE `id_carrier` = '.(int)$old_id);
            if (count($res)) {
                foreach ($res as $val) {
                    Db::getInstance()->execute('
						INSERT INTO `'._DB_PREFIX_.$range.'` (`id_carrier`, `delimiter1`, `delimiter2`)
						VALUES ('.$this->id.','.(float)$val['delimiter1'].','.(float)$val['delimiter2'].')');
                    $range_id = (int)Db::getInstance()->Insert_ID();

                    $range_price_id = ($range == 'range_price') ? $range_id : 'NULL';
                    $range_weight_id = ($range == 'range_weight') ? $range_id : 'NULL';

                    Db::getInstance()->execute('
						INSERT INTO `'._DB_PREFIX_.'delivery` (`id_carrier`, `id_shop`, `id_shop_group`, `id_range_price`, `id_range_weight`, `id_zone`, `price`) (
							SELECT '.(int)$this->id.', `id_shop`, `id_shop_group`, '.(int)$range_price_id.', '.(int)$range_weight_id.', `id_zone`, `price`
							FROM `'._DB_PREFIX_.'delivery`
							WHERE `id_carrier` = '.(int)$old_id.'
							AND `id_'.$range.'` = '.(int)$val['id_range'].'
						)
					');
                }
            }
        }

        // Copy existing zones
        $res = Db::getInstance()->executeS('
			SELECT *
			FROM `'._DB_PREFIX_.'carrier_zone`
			WHERE id_carrier = '.(int)$old_id);
        foreach ($res as $val) {
            Db::getInstance()->execute('
				INSERT INTO `'._DB_PREFIX_.'carrier_zone` (`id_carrier`, `id_zone`)
				VALUES ('.$this->id.','.(int)$val['id_zone'].')
			');
        }

        //Copy default carrier
        if (Configuration::get('PS_CARRIER_DEFAULT') == $old_id) {
            Configuration::updateValue('PS_CARRIER_DEFAULT', (int)$this->id);
        }

        // Copy reference
        $id_reference = Db::getInstance()->getValue('
			SELECT `id_reference`
			FROM `'._DB_PREFIX_.$this->def['table'].'`
			WHERE id_carrier = '.(int)$old_id);
        Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.$this->def['table'].'`
			SET `id_reference` = '.(int)$id_reference.'
			WHERE `id_carrier` = '.(int)$this->id);

        $this->id_reference = (int)$id_reference;

        // Copy tax rules group
        Db::getInstance()->execute('INSERT INTO `'._DB_PREFIX_.'carrier_tax_rules_group_shop` (`id_carrier`, `id_tax_rules_group`, `id_shop`)
												(SELECT '.(int)$this->id.', `id_tax_rules_group`, `id_shop`
													FROM `'._DB_PREFIX_.'carrier_tax_rules_group_shop`
													WHERE `id_carrier`='.(int)$old_id.')');
    }

    /**
     * Get carrier using the reference id
     */
    public static function getCarrierByReference($id_reference)
    {
        // @todo class var $table must became static. here I have to use 'carrier' because this method is static
        $id_carrier = Db::getInstance()->getValue('SELECT `id_carrier` FROM `'._DB_PREFIX_.'carrier`
			WHERE id_reference = '.(int)$id_reference.' AND deleted = 0 ORDER BY id_carrier DESC');
        if (!$id_carrier) {
            return false;
        }
        return new Carrier($id_carrier);
    }

    /**
     * Check if carrier is used (at least one order placed)
     *
     * @return int Order count for this carrier
     */
    public function isUsed()
    {
        $row = Db::getInstance()->getRow('
		SELECT COUNT(`id_carrier`) AS total
		FROM `'._DB_PREFIX_.'orders`
		WHERE `id_carrier` = '.(int)$this->id);

        return (int)$row['total'];
    }

    public function getShippingMethod()
    {
        if ($this->is_free) {
            return Carrier::SHIPPING_METHOD_FREE;
        }

        $method = (int)$this->shipping_method;

        if ($this->shipping_method == Carrier::SHIPPING_METHOD_DEFAULT) {
            // backward compatibility
            if ((int)Configuration::get('PS_SHIPPING_METHOD')) {
                $method = Carrier::SHIPPING_METHOD_WEIGHT;
            } else {
                $method = Carrier::SHIPPING_METHOD_PRICE;
            }
        }

        return $method;
    }

    public function getRangeTable()
    {
        $shipping_method = $this->getShippingMethod();
        if ($shipping_method == Carrier::SHIPPING_METHOD_WEIGHT) {
            return 'range_weight';
        } elseif ($shipping_method == Carrier::SHIPPING_METHOD_PRICE) {
            return 'range_price';
        }
        return false;
    }

    public function getRangeObject($shipping_method = false)
    {
        if (!$shipping_method) {
            $shipping_method = $this->getShippingMethod();
        }

        if ($shipping_method == Carrier::SHIPPING_METHOD_WEIGHT) {
            return new RangeWeight();
        } elseif ($shipping_method == Carrier::SHIPPING_METHOD_PRICE) {
            return new RangePrice();
        }
        return false;
    }

    public function getRangeSuffix($currency = null)
    {
        if (!$currency) {
            $currency = Context::getContext()->currency;
        }
        $suffix = Configuration::get('PS_WEIGHT_UNIT');
        if ($this->getShippingMethod() == Carrier::SHIPPING_METHOD_PRICE) {
            $suffix = $currency->sign;
        }
        return $suffix;
    }

    public function getIdTaxRulesGroup(Context $context = null)
    {
        return Carrier::getIdTaxRulesGroupByIdCarrier((int)$this->id, $context);
    }

    public static function getIdTaxRulesGroupByIdCarrier($id_carrier, Context $context = null)
    {
        if (!$context) {
            $context = Context::getContext();
        }
        $key = 'carrier_id_tax_rules_group_'.(int)$id_carrier.'_'.(int)$context->shop->id;
        if (!Cache::isStored($key)) {
            $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
							SELECT `id_tax_rules_group`
							FROM `'._DB_PREFIX_.'carrier_tax_rules_group_shop`
							WHERE `id_carrier` = '.(int)$id_carrier.' AND id_shop='.(int)Context::getContext()->shop->id);
            Cache::store($key, $result);
            return $result;
        }
        return Cache::retrieve($key);
    }

    public function deleteTaxRulesGroup(array $shops = null)
    {
        if (!$shops) {
            $shops = Shop::getContextListShopID();
        }

        $where = 'id_carrier = '.(int)$this->id;
        if ($shops) {
            $where .= ' AND id_shop IN('.implode(', ', array_map('intval', $shops)).')';
        }
        return Db::getInstance()->delete('carrier_tax_rules_group_shop', $where);
    }

    public function setTaxRulesGroup($id_tax_rules_group, $all_shops = false)
    {
        if (!Validate::isUnsignedId($id_tax_rules_group)) {
            die(Tools::displayError());
        }

        if (!$all_shops) {
            $shops = Shop::getContextListShopID();
        } else {
            $shops = Shop::getShops(true, null, true);
        }

        $this->deleteTaxRulesGroup($shops);

        $values = array();
        foreach ($shops as $id_shop) {
            $values[] = array(
                'id_carrier' => (int)$this->id,
                'id_tax_rules_group' => (int)$id_tax_rules_group,
                'id_shop' => (int)$id_shop,
            );
        }
        Cache::clean('carrier_id_tax_rules_group_'.(int)$this->id.'_'.(int)Context::getContext()->shop->id);
        return Db::getInstance()->insert('carrier_tax_rules_group_shop', $values);
    }

    /**
     * Returns the taxes rate associated to the carrier
     *
     * @since 1.5
     * @param Address $address
     * @return
     */
    public function getTaxesRate(Address $address)
    {
        $tax_calculator = $this->getTaxCalculator($address);
        return $tax_calculator->getTotalRate();
    }

    /**
     * Returns the taxes calculator associated to the carrier
     *
     * @since 1.5
     * @param Address $address
     * @return
     */
    public function getTaxCalculator(Address $address, $id_order = null, $use_average_tax_of_products = false)
    {
        if ($use_average_tax_of_products) {
            return Adapter_ServiceLocator::get('AverageTaxOfProductsTaxCalculator')->setIdOrder($id_order);
        } else {
            $tax_manager = TaxManagerFactory::getManager($address, $this->getIdTaxRulesGroup());
            return $tax_manager->getTaxCalculator();
        }
    }

    /**
     * This tricky method generates a sql clause to check if ranged data are overloaded by multishop
     *
     * @since 1.5.0
     * @param string $rangeTable
     * @return string
     */
    public static function sqlDeliveryRangeShop($range_table, $alias = 'd')
    {
        if (Shop::getContext() == Shop::CONTEXT_ALL) {
            $where = 'AND d2.id_shop IS NULL AND d2.id_shop_group IS NULL';
        } elseif (Shop::getContext() == Shop::CONTEXT_GROUP) {
            $where = 'AND ((d2.id_shop_group IS NULL OR d2.id_shop_group = '.Shop::getContextShopGroupID().') AND d2.id_shop IS NULL)';
        } else {
            $where = 'AND (d2.id_shop = '.Shop::getContextShopID().' OR (d2.id_shop_group = '.Shop::getContextShopGroupID().'
					AND d2.id_shop IS NULL) OR (d2.id_shop_group IS NULL AND d2.id_shop IS NULL))';
        }

        $sql = 'AND '.$alias.'.id_delivery = (
					SELECT d2.id_delivery
					FROM '._DB_PREFIX_.'delivery d2
					WHERE d2.id_carrier = `'.bqSQL($alias).'`.id_carrier
						AND d2.id_zone = `'.bqSQL($alias).'`.id_zone
						AND d2.`id_'.bqSQL($range_table).'` = `'.bqSQL($alias).'`.`id_'.bqSQL($range_table).'`
						'.$where.'
					ORDER BY d2.id_shop DESC, d2.id_shop_group DESC
					LIMIT 1
				)';
        return $sql;
    }

    /**
     * Moves a carrier
     *
     * @since 1.5.0
     * @param bool $way Up (1) or Down (0)
     * @param int $position
     * @return bool Update result
     */
    public function updatePosition($way, $position)
    {
        if (!$res = Db::getInstance()->executeS(
            'SELECT `id_carrier`, `position`
			FROM `'._DB_PREFIX_.'carrier`
			WHERE `deleted` = 0
			ORDER BY `position` ASC'
        )) {
            return false;
        }

        foreach ($res as $carrier) {
            if ((int)$carrier['id_carrier'] == (int)$this->id) {
                $moved_carrier = $carrier;
            }
        }

        if (!isset($moved_carrier) || !isset($position)) {
            return false;
        }

        // < and > statements rather than BETWEEN operator
        // since BETWEEN is treated differently according to databases
        return (Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'carrier`
			SET `position`= `position` '.($way ? '- 1' : '+ 1').'
			WHERE `position`
			'.($way
                ? '> '.(int)$moved_carrier['position'].' AND `position` <= '.(int)$position
                : '< '.(int)$moved_carrier['position'].' AND `position` >= '.(int)$position.'
			AND `deleted` = 0'))
        && Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'carrier`
			SET `position` = '.(int)$position.'
			WHERE `id_carrier` = '.(int)$moved_carrier['id_carrier']));
    }

    /**
     * Reorders carrier positions.
     * Called after deleting a carrier.
     *
     * @since 1.5.0
     * @return bool $return
     */
    public static function cleanPositions()
    {
        $return = true;

        $sql = '
		SELECT `id_carrier`
		FROM `'._DB_PREFIX_.'carrier`
		WHERE `deleted` = 0
		ORDER BY `position` ASC';
        $result = Db::getInstance()->executeS($sql);

        $i = 0;
        foreach ($result as $value) {
            $return = Db::getInstance()->execute('
			UPDATE `'._DB_PREFIX_.'carrier`
			SET `position` = '.(int)$i++.'
			WHERE `id_carrier` = '.(int)$value['id_carrier']);
        }
        return $return;
    }

    /**
     * Gets the highest carrier position
     *
     * @since 1.5.0
     * @return int $position
     */
    public static function getHigherPosition()
    {
        $sql = 'SELECT MAX(`position`)
				FROM `'._DB_PREFIX_.'carrier`
				WHERE `deleted` = 0';
        $position = DB::getInstance()->getValue($sql);
        return (is_numeric($position)) ? $position : -1;
    }

    /**
     * For a given {product, warehouse}, gets the carrier available
     *
     * @since 1.5.0
     * @param Product $product The id of the product, or an array with at least the package size and weight
     * @param         $id_warehouse
     * @param int     $id_address_delivery
     * @param int     $id_shop
     * @param Cart    $cart
     * @param array   &$error  contain an error message if an error occurs
     * @return array
     * @throws PrestaShopDatabaseException
     */
    public static function getAvailableCarrierList(Product $product, $id_warehouse, $id_address_delivery = null, $id_shop = null, $cart = null, &$error = array())
    {
        static $ps_country_default = null;

        if ($ps_country_default === null) {
            $ps_country_default = Configuration::get('PS_COUNTRY_DEFAULT');
        }

        if (is_null($id_shop)) {
            $id_shop = Context::getContext()->shop->id;
        }
        if (is_null($cart)) {
            $cart = Context::getContext()->cart;
        }

        if (is_null($error) || !is_array($error)) {
            $error = array();
        }

        $id_address = (int)((!is_null($id_address_delivery) && $id_address_delivery != 0) ? $id_address_delivery :  $cart->id_address_delivery);
        if ($id_address) {
            $id_zone = Address::getZoneById($id_address);

            // Check the country of the address is activated
            if (!Address::isCountryActiveById($id_address)) {
                return array();
            }
        } else {
            $country = new Country($ps_country_default);
            $id_zone = $country->id_zone;
        }

        // Does the product is linked with carriers?
        $cache_id = 'Carrier::getAvailableCarrierList_'.(int)$product->id.'-'.(int)$id_shop;
        if (!Cache::isStored($cache_id)) {
            $query = new DbQuery();
            $query->select('id_carrier');
            $query->from('product_carrier', 'pc');
            $query->innerJoin(
                'carrier',
                'c',
                'c.id_reference = pc.id_carrier_reference AND c.deleted = 0 AND c.active = 1'
            );
            $query->where('pc.id_product = '.(int)$product->id);
            $query->where('pc.id_shop = '.(int)$id_shop);

            $carriers_for_product = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
            Cache::store($cache_id, $carriers_for_product);
        } else {
            $carriers_for_product = Cache::retrieve($cache_id);
        }

        $carrier_list = array();
        if (!empty($carriers_for_product)) {
            //the product is linked with carriers
            foreach ($carriers_for_product as $carrier) { //check if the linked carriers are available in current zone
                if (Carrier::checkCarrierZone($carrier['id_carrier'], $id_zone)) {
                    $carrier_list[$carrier['id_carrier']] = $carrier['id_carrier'];
                }
            }
            if (empty($carrier_list)) {
                return array();
            }//no linked carrier are available for this zone
        }

        // The product is not dirrectly linked with a carrier
        // Get all the carriers linked to a warehouse
        if ($id_warehouse) {
            $warehouse = new Warehouse($id_warehouse);
            $warehouse_carrier_list = $warehouse->getCarriers();
        }

        $available_carrier_list = array();
        $cache_id = 'Carrier::getAvailableCarrierList_getCarriersForOrder_'.(int)$id_zone.'-'.(int)$cart->id;
        if (!Cache::isStored($cache_id)) {
            $customer = new Customer($cart->id_customer);
            $carrier_error = array();
            $carriers = Carrier::getCarriersForOrder($id_zone, $customer->getGroups(), $cart, $carrier_error);
            Cache::store($cache_id, array($carriers, $carrier_error));
        } else {
            list($carriers, $carrier_error) = Cache::retrieve($cache_id);
        }

        $error = array_merge($error, $carrier_error);

        foreach ($carriers as $carrier) {
            $available_carrier_list[$carrier['id_carrier']] = $carrier['id_carrier'];
        }

        if ($carrier_list) {
            $carrier_list = array_intersect($available_carrier_list, $carrier_list);
        } else {
            $carrier_list = $available_carrier_list;
        }

        if (isset($warehouse_carrier_list)) {
            $carrier_list = array_intersect($carrier_list, $warehouse_carrier_list);
        }

        $cart_quantity = 0;
        $cart_weight = 0;

        foreach ($cart->getProducts(false, false) as $cart_product) {
            if ($cart_product['id_product'] == $product->id) {
                $cart_quantity += $cart_product['cart_quantity'];
            }
            if (isset($cart_product['weight_attribute']) && $cart_product['weight_attribute'] > 0) {
                $cart_weight += ($cart_product['weight_attribute'] * $cart_product['cart_quantity']);
            } else {
                $cart_weight += ($cart_product['weight'] * $cart_product['cart_quantity']);
            }
        }

        if ($product->width > 0 || $product->height > 0 || $product->depth > 0 || $product->weight > 0 || $cart_weight > 0) {
            foreach ($carrier_list as $key => $id_carrier) {
                $carrier = new Carrier($id_carrier);

                // Get the sizes of the carrier and the product and sort them to check if the carrier can take the product.
                $carrier_sizes = array((int)$carrier->max_width, (int)$carrier->max_height, (int)$carrier->max_depth);
                $product_sizes = array((int)$product->width, (int)$product->height, (int)$product->depth);
                rsort($carrier_sizes, SORT_NUMERIC);
                rsort($product_sizes, SORT_NUMERIC);

                if (($carrier_sizes[0] > 0 && $carrier_sizes[0] < $product_sizes[0])
                    || ($carrier_sizes[1] > 0 && $carrier_sizes[1] < $product_sizes[1])
                    || ($carrier_sizes[2] > 0 && $carrier_sizes[2] < $product_sizes[2])) {
                    $error[$carrier->id] = Carrier::SHIPPING_SIZE_EXCEPTION;
                    unset($carrier_list[$key]);
                }

                if ($carrier->max_weight > 0 && ($carrier->max_weight < $product->weight * $cart_quantity || $carrier->max_weight < $cart_weight)) {
                    $error[$carrier->id] = Carrier::SHIPPING_WEIGHT_EXCEPTION;
                    unset($carrier_list[$key]);
                }
            }
        }
        return $carrier_list;
    }

    /**
     * Assign one (ore more) group to all carriers
     *
     * @since 1.5.0
     * @param int|array $id_group_list group id or list of group ids
     * @param array $exception list of id carriers to ignore
     */
    public static function assignGroupToAllCarriers($id_group_list, $exception = null)
    {
        if (!is_array($id_group_list)) {
            $id_group_list = array($id_group_list);
        }

        Db::getInstance()->execute('
			DELETE FROM `'._DB_PREFIX_.'carrier_group`
			WHERE `id_group` IN ('.join(',', $id_group_list).')');

        $carrier_list = Db::getInstance()->executeS('
			SELECT id_carrier FROM `'._DB_PREFIX_.'carrier`
			WHERE deleted = 0
			'.(is_array($exception) ? 'AND id_carrier NOT IN ('.join(',', $exception).')' : ''));

        if ($carrier_list) {
            $data = array();
            foreach ($carrier_list as $carrier) {
                foreach ($id_group_list as $id_group) {
                    $data[] = array(
                        'id_carrier' => $carrier['id_carrier'],
                        'id_group' => $id_group,
                    );
                }
            }
            return Db::getInstance()->insert('carrier_group', $data, false, false, Db::INSERT);
        }

        return true;
    }

    public function setGroups($groups, $delete = true)
    {
        if ($delete) {
            Db::getInstance()->execute('DELETE FROM '._DB_PREFIX_.'carrier_group WHERE id_carrier = '.(int)$this->id);
        }
        if (!is_array($groups) || !count($groups)) {
            return true;
        }
        $sql = 'INSERT INTO '._DB_PREFIX_.'carrier_group (id_carrier, id_group) VALUES ';
        foreach ($groups as $id_group) {
            $sql .= '('.(int)$this->id.', '.(int)$id_group.'),';
        }

        return Db::getInstance()->execute(rtrim($sql, ','));
    }

    /**
     * Return the carrier name from the shop name (e.g. if the carrier name is '0').
     *
     * The returned carrier name is the shop name without '#' and ';' because this is not the same validation.
     *
     * @return string Carrier name
     */
    public static function getCarrierNameFromShopName()
    {
        return str_replace(
            array('#', ';'),
            '',
            Configuration::get('PS_SHOP_NAME')
        );
    }
}