<?php
/*
* 2007-2012 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  2007-2012 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 GroupCore extends ObjectModel
{
	public $id;

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

	/** @var string Reduction */
	public $reduction;

	/** @var int Price display method (tax inc/tax exc) */
	public $price_display_method;

	/** @var boolean Show prices */
	public $show_prices = 1;

	/** @var string Object creation date */
	public $date_add;

	/** @var string Object last modification date */
	public $date_upd;

	/**
	 * @see ObjectModel::$definition
	 */
	public static $definition = array(
		'table' => 'group',
		'primary' => 'id_group',
		'multilang' => true,
		'fields' => array(
			'reduction' => 				array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat'),
			'price_display_method' => 	array('type' => self::TYPE_INT, 'validate' => 'isPriceDisplayMethod', 'required' => true),
			'show_prices' => 			array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
			'date_add' => 				array('type' => self::TYPE_DATE, 'validate' => 'isDate'),
			'date_upd' => 				array('type' => self::TYPE_DATE, 'validate' => 'isDate'),

			// Lang fields
			'name' => 					array('type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'required' => true, 'size' => 32),
		),
	);

	protected static $cache_reduction = array();
	protected static $group_price_display_method = array();

	protected $webserviceParameters = array();

	public static function getGroups($id_lang, $id_shop = false)
	{
		$shop_criteria = '';
		if ($id_shop)
			$shop_criteria = Shop::addSqlAssociation('group', 'g');

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
		SELECT DISTINCT g.`id_group`, g.`reduction`, g.`price_display_method`, gl.`name`
		FROM `'._DB_PREFIX_.'group` g
		LEFT JOIN `'._DB_PREFIX_.'group_lang` AS gl ON (g.`id_group` = gl.`id_group` AND gl.`id_lang` = '.(int)$id_lang.')
		'.$shop_criteria.'
		ORDER BY g.`id_group` ASC');
	}

	public function getCustomers($count = false, $start = 0, $limit = 0)
	{
		if ($count)
			return Db::getInstance()->getValue('
			SELECT COUNT(*)
			FROM `'._DB_PREFIX_.'customer_group` cg
			LEFT JOIN `'._DB_PREFIX_.'customer` c ON (cg.`id_customer` = c.`id_customer`)
			WHERE cg.`id_group` = '.(int)$this->id.'
			AND c.`deleted` != 1');
		return Db::getInstance()->executeS('
		SELECT cg.`id_customer`, c.*
		FROM `'._DB_PREFIX_.'customer_group` cg
		LEFT JOIN `'._DB_PREFIX_.'customer` c ON (cg.`id_customer` = c.`id_customer`)
		WHERE cg.`id_group` = '.(int)$this->id.'
		AND c.`deleted` != 1
		ORDER BY cg.`id_customer` ASC
		'.($limit > 0 ? 'LIMIT '.(int)$start.', '.(int)$limit : ''));
	}

	public static function getReduction($id_customer = null)
	{
		if (!isset(self::$cache_reduction['customer'][(int)$id_customer]))
        {
            $id_group = $id_customer ? Customer::getDefaultGroupId((int)$id_customer) : (int)Configuration::get('PS_CUSTOMER_GROUP');
			self::$cache_reduction['customer'][(int)$id_customer] = Group::getReductionByIdGroup($id_group);
        }
		return self::$cache_reduction['customer'][(int)$id_customer];
	}

	public static function getReductionByIdGroup($id_group)
	{
		if (!isset(self::$cache_reduction['group'][$id_group]))
		{
			self::$cache_reduction['group'][$id_group] = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
			SELECT `reduction`
			FROM `'._DB_PREFIX_.'group`
			WHERE `id_group` = '.(int)$id_group);
		}
		return self::$cache_reduction['group'][$id_group];
	}

	public static function getPriceDisplayMethod($id_group)
	{
		if (!isset(Group::$group_price_display_method[$id_group]))
			self::$group_price_display_method[$id_group] = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
			SELECT `price_display_method`
			FROM `'._DB_PREFIX_.'group`
			WHERE `id_group` = '.(int)$id_group);
		return self::$group_price_display_method[$id_group];
	}

	public static function getDefaultPriceDisplayMethod()
	{
		return Group::getPriceDisplayMethod((int)Configuration::get('PS_CUSTOMER_GROUP'));
	}

	public function add($autodate = true, $null_values = false)
	{
		if (parent::add($autodate, $null_values))
		{
			Category::setNewGroupForHome((int)$this->id);
			
			Carrier::assignGroupToAllCarriers((int)$this->id);

			// Set cache of feature detachable to true
			Configuration::updateGlobalValue('PS_GROUP_FEATURE_ACTIVE', '1');
			return true;
		}
		return false;
	}

	public function delete()
	{
		if ($this->id == _PS_DEFAULT_CUSTOMER_GROUP_)
			return false;
		if (parent::delete())
		{
			Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'cart_rule_group` WHERE `id_group` = '.(int)$this->id);
			Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'customer_group` WHERE `id_group` = '.(int)$this->id);
			Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'category_group` WHERE `id_group` = '.(int)$this->id);
			Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'group_reduction` WHERE `id_group` = '.(int)$this->id);
			Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'product_group_reduction_cache` WHERE `id_group` = '.(int)$this->id);
			$this->truncateModulesRestrictions($this->id);

			// Refresh cache of feature detachable
			Configuration::updateGlobalValue('PS_GROUP_FEATURE_ACTIVE', Group::isCurrentlyUsed());

			// Add default group (id 3) to customers without groups
			Db::getInstance()->execute('INSERT INTO `'._DB_PREFIX_.'customer_group` (
				SELECT c.id_customer, '.(int)Configuration::get('PS_CUSTOMER_GROUP').' FROM `'._DB_PREFIX_.'customer` c
				LEFT JOIN `'._DB_PREFIX_.'customer_group` cg
				ON cg.id_customer = c.id_customer
				WHERE cg.id_customer IS NULL)');

			// Set to the customer the default group
			// Select the minimal id from customer_group
			Db::getInstance()->execute('UPDATE `'._DB_PREFIX_.'customer` cg
				SET id_default_group =
					IFNULL((
						SELECT min(id_group) FROM `'._DB_PREFIX_.'customer_group`
						WHERE id_customer = cg.id_customer),
						'.(int)Configuration::get('PS_CUSTOMER_GROUP').')
				WHERE `id_default_group` = '.(int)$this->id);

			return true;
		}
		return false;
	}

	/**
	 * This method is allow to know if a feature is used or active
	 * @since 1.5.0.1
	 * @return bool
	 */
	public static function isFeatureActive()
	{
		return Configuration::get('PS_GROUP_FEATURE_ACTIVE');
	}

	/**
	 * This method is allow to know if a Discount entity is currently used
	 * @since 1.5.0.1
	 * @param $table
	 * @param $has_active_column
	 * @return bool
	 */
	public static function isCurrentlyUsed($table = null, $has_active_column = false)
	{
		// We don't use the parent method, for specific clause reason (id_group != 3)
		return (bool)Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue('
			SELECT `id_group`
			FROM `'._DB_PREFIX_.'group`
			WHERE `id_group` != '.(int)Configuration::get('PS_CUSTOMER_GROUP').'
		');
	}

	/**
	 * Truncate all modules restrictions for the group
	 * @param integer id_group
	 * @return boolean result
	 */
	public static function truncateModulesRestrictions($id_group)
	{
		return Db::getInstance()->execute('
		DELETE FROM `'._DB_PREFIX_.'module_group`
		WHERE `id_group` = '.(int)$id_group);
	}

	/**
	 * Truncate all restrictions by module
	 * @param integer id_module
	 * @return boolean result
	 */
	public static function truncateRestrictionsByModule($id_module)
	{
		return Db::getInstance()->execute('
		DELETE FROM `'._DB_PREFIX_.'module_group`
		WHERE `id_module` = '.(int)$id_module);
	}

	/**
	 * Adding restrictions modules to the group with id $id_group
	 * @param $id_group
	 * @param $modules
	 * @param array $shops
	 * @return bool
	 */
	public static function addModulesRestrictions($id_group, $modules, $shops = array(1))
	{
		if (!is_array($modules) || !count($modules) || !is_array($shops) || !count($shops))
			return false;

		// Delete all record for this group
		Db::getInstance()->execute('DELETE FROM `'._DB_PREFIX_.'module_group` WHERE `id_group` = '.(int)$id_group);
		
		$sql = 'INSERT INTO `'._DB_PREFIX_.'module_group` (`id_module`, `id_shop`, `id_group`) VALUES ';
		foreach ($modules as $module)
			foreach ($shops as $shop)
				$sql .= '("'.(int)$module.'", "'.(int)$shop.'", "'.(int)$id_group.'"),';
		$sql = rtrim($sql, ',');
		
		return (bool)Db::getInstance()->execute($sql);
	}

	/**
	 * Add restrictions for a new module
	 * We authorize every groups to the new module
	 * @param integer id_module
	 * @param array $shops
	 */
	public static function addRestrictionsForModule($id_module, $shops = array(1))
	{
		if (!is_array($shops) || !count($shops))
			return false;
		
		$res = true;
		foreach ($shops as $shop)
			$res &= Db::getInstance()->execute('
			INSERT INTO `'._DB_PREFIX_.'module_group` (`id_module`, `id_shop`, `id_group`)
			(SELECT '.(int)$id_module.', '.(int)$shop.', id_group FROM `'._DB_PREFIX_.'group`)');
		return $res;
	}

	/**
	 * Return current group object
	 * Use context
	 * @static
	 * @return Group Group object
	 */
	public static function getCurrent()
	{
		$customer = Context::getContext()->customer;
		$id_group = (int)Configuration::get('PS_UNIDENTIFIED_GROUP');

		if (Validate::isLoadedObject($customer))
			$id_group = (int)$customer->id_default_group;

		return new self($id_group);
	}
}