<?php
/**
 * NOTICE OF LICENSE
 *
 * This source file is subject to a commercial license from Common-Services Co., Ltd.
 * Use, copy, modification or distribution of this source file without written
 * license agreement from the SARL SMC is strictly forbidden.
 * In order to obtain a license, please contact us: contact@common-services.com
 * ...........................................................................
 * INFORMATION SUR LA LICENCE D'UTILISATION
 *
 * L'utilisation de ce fichier source est soumise a une licence commerciale
 * concedee par la societe Common-Services Co., Ltd.
 * Toute utilisation, reproduction, modification ou distribution du present
 * fichier source sans contrat de licence ecrit de la part de la Common-Services Co. Ltd. est
 * expressement interdite.
 * Pour obtenir une licence, veuillez contacter Common-Services Co., Ltd. a l'adresse: contact@common-services.com
 * ...........................................................................
 *
 * @package   soflexibilite
 * @author    Alexandre D.
 * @copyright Copyright (c) 2011-2015 Common Services Co Ltd - 90/25 Sukhumvit 81 - 10260 Bangkok - Thailand
 * @license   Commercial license
 * Support by mail  :  support.soflexibilite@common-services.com
 */

class SoFlexibiliteDelivery
{

    const MODE_PRESTASHOP = 1;
    const MODE_THIRDPARTY = 2;

    public $mode;
    public $id;
    public $id_order;
    public $id_cart;
    public $id_point;
    public $id_customer;
    public $firstname;
    public $lastname;
    public $company;
    public $telephone;
    public $email;
    public $type;
    public $libelle;
    public $indice;
    public $postcode;
    public $city;
    public $country;
    public $address1;
    public $address2;
    public $lieudit;
    public $informations;
    protected $database_mapping_fields = array(
        'id' => array('prid', 'point_id'),
        'id_order' => array('order_id'),
        'id_cart' => array('id_cart', 'cart_id'),
        'id_point' => array('prid', 'point_id'),
        'id_customer' => array('id_customer', 'customer_id'),
        'firstname' => array('cefirstname', 'firstname'),
        'lastname' => array('cename', 'lastname'),
        'company' => array('cecompanyname', 'company'),
        'telephone' => array('cephonenumber', 'telephone'),
        'email' => array('ceemail', 'email'),
        'type' => array('delivery_mode', 'type'),
        'libelle' => array('prname', 'libelle'),
        'indice' => array('prcompladress', 'indice'),
        'postcode' => array('przipcode', 'code_postal'),
        'city' => array('prtown', 'commune'),
        'country' => array('cecountry', 'pays'),
        'address1' => array('pradress1', 'adresse1'),
        'address2' => array('pradress2', 'adresse2'),
        'lieudit' => array('pradress3', 'lieudit'),
        'informations' => array('cedeliveryinformation', 'informations'),
    );
    public $validation = array(
        'company' => '/[<>=#{}]*/',
        'firstname' => '/[0-9!<>,;?=+()@#"°{}_$%:]*/',
        'lastname' => '/[0-9!<>,;?=+()@#"°{}_$%:]*/',
        'address1' => '/[!<>?=+@{}_$%]*/',
        'address2' => '/[!<>?=+@{}_$%]*/',
        'postcode' => '/[^a-zA-Z 0-9-]/',
        'city' => '/[!<>;?=+@#"°{}_$%]*/',
        'phone' => '/[a-zA-Z^%$#@!-]/',
        'phone_mobile' => '/[a-zA-Z^%$#@!-]/'
    );

    public function __construct($id_cart = null, $id_customer = null)
    {
        $this->mode = max(1, (int)Configuration::get('SOFLEXIBILITE_MODE')) == 1 ?
            self::MODE_PRESTASHOP : self::MODE_THIRDPARTY;

        if ($id_cart) {
            $this->id_cart = (int)$id_cart;
        }
        if ($id_customer) {
            $this->id_customer = (int)$id_customer;
        }
    }

    public function loadDelivery()
    {
        if (!$this->isInitSoFlexibiliteDelivery()) {
            return (false);
        }

        $id_cart = 'id_cart';
        $id_customer = 'id_customer';
        $table_name = 'socolissimo_delivery_info';
        if ($this->mode == self::MODE_THIRDPARTY) {
            $id_cart = 'cart_id';
            $id_customer = 'customer_id';
            $table_name = 'so_delivery';
        }

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

        $result = Db::getInstance()->getRow(
            'SELECT *
            FROM `'._DB_PREFIX_.$table_name.'`
            WHERE `'.$id_cart.'` = '.(int)$this->id_cart.'
            AND `'.$id_customer.'` = '.(int)$this->id_customer
        );

        if (!isset($result[$id_cart]) || !(int)$result[$id_cart]) {
            return (false);
        }

        foreach ($this->database_mapping_fields as $k => $arr) {
            foreach ($result as $idx => $val) {
                if (in_array($idx, $arr)) {
                    $this->{$k} = $val;
                }
            }
        }

        return (true);
    }

    public function isLoadedObject()
    {
        return ($this instanceof SoFlexibiliteDelivery && $this->id_cart && $this->id_customer);
    }

    public function createAddressForPickupPoint($id_address_delivery = null)
    {
        if (!$this->isInitSoFlexibiliteDelivery()) {
            return (false);
        }

        if ($id_address_delivery) {
            $customer_address = new Address($id_address_delivery);
        } else {
            $customer_address = null;
        }

        $address = new Address();
        $address_rules = Address::getValidationRules('Address');

        $this->country = ($this->country && Tools::strlen($this->country) === 2) ?
            $this->country : Country::getIsoById($customer_address->id_country);
        $this->id_customer = $this->id_customer ? $this->id_customer : $customer_address->id_customer;

        //$address->id_country = (int)Country::getByIso($this->country);
        $address->id_country = strtolower($this->country) == 'fr'? 8: (int)Country::getByIso($this->country);
        $address->id_customer = (int)$this->id_customer;
        $address->firstname = $customer_address->firstname;
        $address->lastname = $customer_address->lastname;
        $address->company = $this->libelle;
        $address->address1 = $this->address1 ? $this->address1 : $customer_address->address1;
        $address->address2 = $this->address2;
        $address->postcode = $this->postcode ? $this->postcode : $customer_address->postcode;
        $address->city = $this->city ? $this->city : $customer_address->city;
        $address->phone_mobile = $this->telephone ? $this->telephone : $customer_address->phone_mobile;
        $address->phone = $this->telephone ? $this->telephone : $customer_address->phone;

        if (!$address->phone_mobile) {
            $address->phone_mobile = '0661123456';
        }

        $address_fields = array(
            'company',
            'firstname',
            'lastname',
            'address1',
            'address2',
            'postcode',
            'city',
            'phone',
            'phone_mobile'
        );

        foreach ($address_fields as $field) {
            $address->{$field} = preg_replace($this->validation[$field], '', $address->{$field});

            if (isset($address_rules['required'][$field]) && $address_rules['required'][$field]) {
                if (empty($address->{$field})) {
                    $address->{$field} = '-';
                }
            }

            if (isset($address_rules['size'][$field]) && $address_rules['size'][$field]) {
                $address->{$field} = Tools::substr($address->{$field}, 0, $address_rules['size'][$field]);
            }
        }

        $address->alias = 'So Colissimo - '.date('d-m-Y');
        $address->active = 1;
        $address->deleted = 1;
        $address->add();

        if (!Validate::isLoadedObject($address)) {
            return (false);
        }

        return ((int)$address->id);
    }

    public function tableExists($table_name)
    {
        try {
            $result = Db::getInstance()->ExecuteS('SHOW TABLES LIKE "'._DB_PREFIX_.pSQL($table_name).'"');
        } catch (Exception $e) {
            return (false);
        }

        if (!count($result)) {
            return (false);
        }

        try {
            $result = Db::getInstance()->ExecuteS('SHOW COLUMNS FROM `'._DB_PREFIX_.pSQL($table_name).'`');
        } catch (Exception $e) {
            return (false);
        }

        if (!count($result)) {
            return (false);
        }

        return (true);
    }

    public function isInitSoFlexibiliteDelivery()
    {
        return ($this instanceof SoFlexibiliteDelivery && $this->id_cart && $this->id_customer);
    }

    public function removeDelivery($id_cart_to_delete)
    {
        if (!$id_cart_to_delete || !is_numeric($id_cart_to_delete)) {
            return false;
        }

        $id_cart = 'id_cart';
        $table_name = 'socolissimo_delivery_info';
        if ($this->mode == self::MODE_THIRDPARTY) {
            $id_cart = 'cart_id';
            $table_name = 'so_delivery';
        }

        return (Db::getInstance()->delete(_DB_PREFIX_.$table_name, '`'.$id_cart.'` = '.(int)$id_cart_to_delete));
    }

    public function saveDelivery()
    {
        $this->installDeliveryTable();


        if ($this->existsDelivery()) {
            $result = $this->updateDelivery();
        } else {
            $result = $this->createDelivery();
        }

        return ($result);
    }

    public function updateDelivery()
    {
        if (!$this->isInitSoFlexibiliteDelivery()) {
            return (false);
        }

        if ($this->mode == self::MODE_PRESTASHOP) {
            $table_name = 'socolissimo_delivery_info';
            $where = '`id_cart` = '.(int)$this->id_cart;
            $values = array(
                'id_cart' => (int)$this->id_cart,
                'id_customer' => (int)$this->id_customer,
                'delivery_mode' => pSQL($this->type),
                'prid' => pSQL($this->id_point),
                'prname' => pSQL($this->libelle),
                // pSQL($this->lastname),
                'prfirstname' => pSQL($this->firstname),
                'prcompladress' => pSQL($this->indice),
                'pradress4' => null,
                'przipcode' => pSQL($this->postcode),
                'prtown' => pSQL($this->city),
                'cephonenumber' => pSQL(str_replace(' ', '', $this->telephone)),
                'ceemail' => pSQL($this->email),
                'cecompanyname' => pSQL($this->company),
                'cedeliveryinformation' => pSQL($this->informations),
                'cedoorcode1' => null,
                'cedoorcode2' => null,
                'cename' => pSQL($this->lastname),
                'cefirstname' => pSQL($this->firstname),
                'cecountry' => pSQL($this->country),
                'codereseau' => in_array($this->type, array('CMT', 'BDP', 'BOM', 'BOS')) ? 'R12' : ''
            );

            if (in_array($this->type, array('DOM', 'DOS', 'RDV'))) {
                $values['pradress1'] = pSQL($this->address2);
                $values['pradress2'] = pSQL($this->lieudit);
                $values['pradress3'] = pSQL($this->address1);
                $values['prname'] = pSQL($this->lastname);
            } else {
                $values['pradress1'] = pSQL($this->address1);
                $values['pradress2'] = pSQL($this->address2);
                $values['pradress3'] = pSQL($this->lieudit);
            }
        } else {
            $table_name = 'so_delivery';
            $where = '`cart_id` = '.(int)$this->id_cart;
            $values = array(
                'cart_id' => (int)$this->id_cart,
                'order_id' => (int)$this->id_order,
                'customer_id' => (int)$this->id_customer,
                'type' => pSQL($this->type),
                'point_id' => pSQL($this->id_point),
                'libelle' => pSQL($this->libelle),
                'firstname' => pSQL($this->firstname),
                'lastname' => pSQL($this->lastname),
                'indice' => pSQL($this->indice),
                'adresse1' => pSQL($this->address1),
                'adresse2' => pSQL($this->address2),
                'lieudit' => pSQL($this->lieudit),
                'code_postal' => pSQL($this->postcode),
                'commune' => pSQL($this->city),
                'pays' => in_array($this->country, array('Belgique', 'BE')) ? 'BE' : 'FR',
                'telephone' => pSQL(str_replace(' ', '', $this->telephone)),
                'email' => pSQL($this->email),
                'company' => pSQL($this->company),
                'codereseau' => in_array($this->type, array('CMT', 'BDP', 'BOM', 'BOS')) ? 'R12' : ''
            );

            if (in_array($values['type'], array('DOM', 'DOS')) && $values['pays'] == 'BE') {
                $values['codereseau'] = 'R12';
            }
        }

        if (version_compare(_PS_VERSION_, '1.5', '>=')) {
            $result = Db::getInstance()->update($table_name, $values, $where);
        } else {
            $result = Db::getInstance()->autoExecute(_DB_PREFIX_.$table_name, $values, 'UPDATE', $where);
        }

        return ($result);
    }

    public function createDelivery()
    {
        if (!$this->isInitSoFlexibiliteDelivery()) {
            return (false);
        }

        if ($this->mode == self::MODE_PRESTASHOP) {
            $table_name = 'socolissimo_delivery_info';
            $values = array(
                'id_cart' => (int)$this->id_cart,
                'id_customer' => (int)$this->id_customer,
                'delivery_mode' => pSQL($this->type),
                'prid' => pSQL($this->id_point),
                'prname' => pSQL($this->libelle),
                // pSQL($this->lastname),
                'prfirstname' => pSQL($this->firstname),
                'prcompladress' => pSQL($this->indice),
                'pradress4' => null,
                'przipcode' => pSQL($this->postcode),
                'prtown' => pSQL($this->city),
                'cephonenumber' => pSQL(str_replace(' ', '', $this->telephone)),
                'ceemail' => pSQL($this->email),
                'cecompanyname' => pSQL($this->company),
                'cedeliveryinformation' => null,
                'cedoorcode1' => null,
                'cedoorcode2' => null,
                'cename' => pSQL($this->lastname),
                'cefirstname' => pSQL($this->firstname),
                'cecountry' => pSQL($this->country),
                'codereseau' => in_array($this->type, array('CMT', 'BDP', 'BOM', 'BOS')) ? 'R12' : ''
            );

            if (in_array($this->type, array('DOM', 'DOS')) && $values['cecountry'] == 'BE') {
                $values['codereseau'] =  'R12';
                $values['delivery_mode'] = ($this->type == 'DOM') ? 'BOM' : 'BOS';
            }

            if ($this->type == 'CMT' && in_array($this->country, array('DE', 'ES', 'GB', 'LU', 'NL'))) {
                $values['codereseau'] =  'R09';
            } elseif (in_array($this->type, array('BDP', 'PCS')) && in_array($this->country, array('DE', 'ES', 'NL'))) {
                $values['codereseau'] =  'X00';
            }

            if (in_array($this->type, array('DOM', 'DOS'))) {
                $values['pradress1'] = pSQL($this->address2);
                $values['pradress2'] = pSQL($this->lieudit);
                $values['pradress3'] = pSQL($this->address1);
                $values['prname'] = pSQL($this->lastname);
            } else {
                $values['pradress1'] = pSQL($this->address1);
                $values['pradress2'] = pSQL($this->address2);
                $values['pradress3'] = pSQL($this->lieudit);
            }
        } else {
            $table_name = 'so_delivery';
            $values = array(
                'cart_id' => (int)$this->id_cart,
                'order_id' => -(int)time(),
                'customer_id' => (int)$this->id_customer,
                'type' => pSQL($this->type),
                'point_id' => pSQL($this->id_point),
                'libelle' => pSQL($this->libelle),
                'firstname' => pSQL($this->firstname),
                'lastname' => pSQL($this->lastname),
                'indice' => pSQL($this->indice),
                'adresse1' => pSQL($this->address1),
                'adresse2' => pSQL($this->address2),
                'lieudit' => pSQL($this->lieudit),
                'code_postal' => pSQL($this->postcode),
                'commune' => pSQL($this->city),
                'pays' => $this->country,
                'telephone' => pSQL(str_replace(' ', '', $this->telephone)),
                'email' => pSQL($this->email),
                'company' => pSQL($this->company),
                'codereseau' => in_array($this->type, array('CMT', 'BDP', 'BOM', 'BOS')) ? 'R12' : ''
            );

            if (in_array($values['type'], array('DOM', 'DOS')) && $values['pays'] == 'BE') {
                $values['codereseau'] = 'R12';
                $values['type'] = ($this->type == 'DOM') ? 'BOM' : 'BOS';
            }

            if ($this->type == 'CMT' && in_array($this->country, array('DE', 'ES', 'GB', 'LU', 'NL'))) {
                $values['codereseau'] =  'R09';
            } elseif (in_array($this->type, array('BDP', 'PCS')) && in_array($this->country, array('DE', 'ES', 'NL'))) {
                $values['codereseau'] =  'X00';
            }
        }

        if (version_compare(_PS_VERSION_, '1.5', '>=')) {
            $result = Db::getInstance()->insert($table_name, $values);
        } else {
            $result = Db::getInstance()->autoExecute(_DB_PREFIX_.$table_name, $values, 'INSERT');
        }

        return ($result);
    }

    public function existsDelivery()
    {
        $id_cart = 'id_cart';
        $id_customer = 'id_customer';
        $table_name = 'socolissimo_delivery_info';
        if ($this->mode == self::MODE_THIRDPARTY) {
            $id_cart = 'cart_id';
            $id_customer = 'customer_id';
            $table_name = 'so_delivery';
        }

        if ($this->isInitSoFlexibiliteDelivery()) {
            $result = Db::getInstance()->getRow(
                'SELECT `'.$id_cart.'`
                FROM `'._DB_PREFIX_.$table_name.'`
                WHERE `'.$id_cart.'` = '.(int)$this->id_cart.'
                AND `'.$id_customer.'` = '.(int)$this->id_customer
            );

            return (isset($result[$id_cart]) && (int)$result[$id_cart]);
        }

        return (false);
    }

    public function installDeliveryTable()
    {
        $pass = true;
        $tables = array();
        $query = Db::getInstance()->ExecuteS('SHOW TABLES');

        foreach ($query as $rows) {
            foreach ($rows as $table) {
                $tables[$table] = 1;
            }
        }

        if ($this->mode == self::MODE_PRESTASHOP) {
            if (isset($tables[_DB_PREFIX_.'socolissimo_delivery_info'])) {
                $pass = true;
                $sqls = array();
                $fields = array();

                $query = Db::getInstance()->ExecuteS('SHOW COLUMNS FROM `'._DB_PREFIX_.'socolissimo_delivery_info`');

                // Check existing field
                if ($query) {
                    foreach ($query as $row) {
                        if ($row['Field'] === 'cephonenumber' &&
                            filter_var($row['Type'], FILTER_SANITIZE_NUMBER_INT) < 15
                        ) {
                            Db::getInstance()->execute(
                                'ALTER TABLE `'._DB_PREFIX_.'socolissimo_delivery_info`
                                MODIFY `cephonenumber` VARCHAR(15)'
                            );
                        }
                    }
                }

                if ($query) {
                    foreach ($query as $row) {
                        $fields[$row['Field']] = 1;
                    }
                }

                // Add new field sample
                if (!isset($fields['codereseau'])) {
                    $sqls[] =
                        'ALTER TABLE `'._DB_PREFIX_.'socolissimo_delivery_info`
                        ADD  `codereseau` VARCHAR(3) NOT NULL AFTER `cedoorcode2`';
                }
                if (!isset($fields['cename'])) {
                    $sqls[] =
                        'ALTER TABLE `'._DB_PREFIX_.'socolissimo_delivery_info`
                        ADD  `cename` VARCHAR(64) DEFAULT NULL';
                }
                if (!isset($fields['cefirstname'])) {
                    $sqls[] =
                        'ALTER TABLE `'._DB_PREFIX_.'socolissimo_delivery_info`
                        ADD  `cefirstname` VARCHAR(64) DEFAULT NULL';
                }
                if (!isset($fields['cecountry'])) {
                    $sqls[] =
                        'ALTER TABLE `'._DB_PREFIX_.'socolissimo_delivery_info`
                        ADD  `cecountry` VARCHAR(10) DEFAULT NULL AFTER `prtown`';
                }

                if (count($sqls)) {
                    foreach ($sqls as $sql) {
                        $pass = Db::getInstance()->Execute($sql) && $pass;
                    }
                }
            } else {
                $sql = '
                    CREATE TABLE IF NOT EXISTS `'._DB_PREFIX_.'socolissimo_delivery_info` (
                        `id_cart` INT(10) NOT NULL,
                        `id_customer` INT(10) NOT NULL,
                        `delivery_mode` VARCHAR(3) NOT NULL,
                        `prid` TEXT(10) NOT NULL,
                        `prname` VARCHAR(64) NOT NULL,
                        `prfirstname` VARCHAR(64) NOT NULL,
                        `prcompladress` TEXT NOT NULL,
                        `pradress1` TEXT NOT NULL,
                        `pradress2` TEXT NOT NULL,
                        `pradress3` TEXT NOT NULL,
                        `pradress4` TEXT NOT NULL,
                        `przipcode` TEXT(10) NOT NULL,
                        `prtown` VARCHAR(64) NOT NULL,
                        `cecountry` VARCHAR(10) NOT NULL,
                        `cephonenumber` VARCHAR(15) NOT NULL,
                        `ceemail` VARCHAR(64) NOT NULL,
                        `cecompanyname` VARCHAR(64) NOT NULL,
                        `cedeliveryinformation` TEXT NOT NULL,
                        `cedoorcode1` VARCHAR(10) NOT NULL,
                        `cedoorcode2` VARCHAR(10) NOT NULL,
                        `codereseau` VARCHAR(3) DEFAULT NULL,
                        `cename` VARCHAR(64) DEFAULT NULL,
                        `cefirstname` VARCHAR(64) DEFAULT NULL,
                        PRIMARY KEY  (`id_cart`,`id_customer`)
                    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;';

                $pass = Db::getInstance()->execute($sql);
            }
        } else {
            $pass = true;

            // Laisser les champs de type TEXT a la fin pour des raisons d'optimisation SQL
            $sql = '
                CREATE TABLE IF NOT EXISTS `'._DB_PREFIX_.'so_delivery`(
                    `id` int(11) NOT NULL AUTO_INCREMENT,
                    `order_id` int(11) DEFAULT NULL,
                    `cart_id` int(11) DEFAULT NULL,
                    `point_id` int(11) NOT NULL,
                    `customer_id` int(11) NOT NULL,
                    `firstname` varchar(38) DEFAULT NULL,
                    `lastname` varchar(38) DEFAULT NULL,
                    `company` varchar(38) DEFAULT NULL,
                    `telephone` varchar(10) DEFAULT NULL,
                    `email` varchar(64) DEFAULT NULL,
                    `type` varchar(3) DEFAULT NULL,
                    `libelle` varchar(50) DEFAULT NULL,
                    `indice` varchar(70) DEFAULT NULL,
                    `code_postal` varchar(5) DEFAULT NULL,
                    `commune` varchar(32) DEFAULT NULL,
                    `pays` varchar(32) NOT NULL,
                    `adresse1` varchar(38) DEFAULT NULL,
                    `adresse2` varchar(38) DEFAULT NULL,
                    `lieudit` varchar(38) DEFAULT NULL,
                    `codereseau` varchar(3) DEFAULT NULL,
                    `informations` text,
                      PRIMARY KEY (`id`),
                      UNIQUE KEY `u_order_id` (`order_id`),
                      UNIQUE KEY `u_cart_id` (`cart_id`)
                ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=10000000 ;';

            if (!Db::getInstance()->Execute($sql)) {
                return false;
            }

            $sqls = array();

            // Alter the table to reflect new approach and add some
            // REFIX: Add Fields
            $query = Db::getInstance()->ExecuteS('SHOW COLUMNS FROM `'._DB_PREFIX_.'so_delivery`');
            $fields = array();
            foreach ($query as $row) {
                $fields[$row['Field']] = 1;
            }

            if (!isset($fields['cart_id'])) {
                $sqls[] = sprintf(
                    'ALTER TABLE `%s` ADD `cart_id` int(11) NULL AFTER `order_id`',
                    _DB_PREFIX_.'so_delivery'
                );
            }
            if (!isset($fields['pays'])) {
                $sqls[] = sprintf(
                    'ALTER TABLE `%s` ADD `pays` int(11) NULL AFTER `commune`',
                    _DB_PREFIX_.'so_delivery'
                );
            }
            if (!isset($fields['codereseau'])) {
                $sqls[] = sprintf(
                    'ALTER TABLE `%s` ADD `codereseau` varchar(3) DEFAULT NULL',
                    _DB_PREFIX_.'so_delivery'
                );
            }

            // REFIX: Add Indexes
            $query = Db::getInstance()->ExecuteS('SHOW INDEX FROM `'._DB_PREFIX_.'so_delivery`');
            $fields = array();
            foreach ($query as $row) {
                $fields[$row['Key_name']] = 1;
            }

            if (!isset($fields['u_order_id'])) {
                $sqls[] = sprintf(
                    'ALTER TABLE `%s` ADD UNIQUE `u_order_id` (`order_id`)',
                    _DB_PREFIX_.$this->_delivery
                );
            }
            if (!isset($fields['u_order_id'])) {
                $sqls[] = sprintf(
                    'ALTER TABLE `%s` ADD UNIQUE `u_cart_id` (`cart_id`)',
                    _DB_PREFIX_.$this->_delivery
                );
            }

            // REFIX: Change Fields
            $sqls[] = sprintf(
                'ALTER TABLE `%s` CHANGE `order_id` `order_id` int(11) NULL',
                _DB_PREFIX_.'so_delivery'
            );

            if ($sqls) {
                foreach ($sqls as $sql) {
                    try {
                        if (!Db::getInstance()->Execute($sql)) {
                            $pass = false;
                        }
                    } catch (Exception $e) {
                        $pass = false;
                        echo $e->getMessage();
                    }
                }
            }
        }

        return $pass;
    }

}