<?php
/*
* 2007-2011 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  2007-2011 PrestaShop SA
*  @version  Release: $Revision: 7540 $
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class FeatureCore extends ObjectModel
{
 	/** @var string Name */
	public 		$name;
	
 	protected 	$fieldsRequiredLang = array('name');
 	protected 	$fieldsSizeLang = array('name' => 128);
 	protected 	$fieldsValidateLang = array('name' => 'isGenericName');
		
	protected 	$table = 'feature';
	protected 	$identifier = 'id_feature';
	
	protected	$webserviceParameters = array(
		'objectsNodeName' => 'product_features',
		'objectNodeName' => 'product_feature',
		'fields' => array(),
	);

	public function getFields()
	{
		return array('id_feature' => NULL);
	}
	
	/**
	* Check then return multilingual fields for database interaction
	*
	* @return array Multilingual fields
	*/
	public function getTranslationsFieldsChild()
	{
		parent::validateFieldsLang();
		return parent::getTranslationsFields(array('name'));
	}
	
	/**
	 * Get a feature data for a given id_feature and id_lang
	 *
	 * @param integer $id_lang Language id
	 * @param integer $id_feature Feature id
	 * @return array Array with feature's data
	 * @static
	 */
	public static function getFeature($id_lang, $id_feature)
	{
		return Db::getInstance()->getRow('
		SELECT *
		FROM `'._DB_PREFIX_.'feature` f
		LEFT JOIN `'._DB_PREFIX_.'feature_lang` fl ON ( f.`id_feature` = fl.`id_feature` AND fl.`id_lang` = '.(int)($id_lang).')
		WHERE f.`id_feature` = '.(int)($id_feature));
	}
	
	/**
	 * Get all features for a given language
	 *
	 * @param integer $id_lang Language id
	 * @return array Multiple arrays with feature's data
	 * @static
	 */
	public static function getFeatures($id_lang)
	{
		return Db::getInstance()->ExecuteS('
		SELECT *
		FROM `'._DB_PREFIX_.'feature` f
		LEFT JOIN `'._DB_PREFIX_.'feature_lang` fl ON (f.`id_feature` = fl.`id_feature` AND fl.`id_lang` = '.(int)($id_lang).')
		ORDER BY fl.`name` ASC');
	}
	
	/**
	 * Delete several objects from database
	 *
	 * @param array $selection Array with items to delete
	 * @return boolean Deletion result
	 */
	public function deleteSelection($selection)
	{
		/* Also delete Attributes */
		foreach ($selection AS $value) {
			$obj = new Feature($value);
			if (!$obj->delete())
				return false;
		}
		return true;
	}

	public function add($autodate = true, $nullValues = false)
	{
		return parent::add($autodate, true);
	}

	public function delete()
	{
	 	/* Also delete related attributes */
		Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'feature_value_lang` WHERE `id_feature_value` IN (SELECT id_feature_value FROM `'._DB_PREFIX_.'feature_value` WHERE `id_feature` = '.(int)($this->id).')');
		Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'feature_value` WHERE `id_feature` = '.(int)($this->id));
		/* Also delete related products */
		Db::getInstance()->Execute('DELETE FROM `'._DB_PREFIX_.'feature_product` WHERE `id_feature` = '.(int)($this->id));
		return parent::delete();
	}
	
	public function update($nullValues = false)
	{
	 	$this->clearCache();
	 	
	 	$result = 1;
	 	$fields = $this->getTranslationsFieldsChild();
		foreach ($fields as $field)
		{
			foreach (array_keys($field) as $key)
			 	if (!Validate::isTableOrIdentifier($key))
	 				die(Tools::displayError());
			$mode = Db::getInstance()->getRow('SELECT `id_lang` FROM `'.pSQL(_DB_PREFIX_.$this->table).'_lang` WHERE `'.pSQL($this->identifier).
			'` = '.(int)($this->id).' AND `id_lang` = '.(int)($field['id_lang']));
			$result *= (!Db::getInstance()->NumRows()) ? Db::getInstance()->AutoExecute(_DB_PREFIX_.$this->table.'_lang', $field, 'INSERT') : 
			Db::getInstance()->AutoExecute(_DB_PREFIX_.$this->table.'_lang', $field, 'UPDATE', '`'.
			pSQL($this->identifier).'` = '.(int)($this->id).' AND `id_lang` = '.(int)($field['id_lang']));
		}
		return $result;
	}
	
	/**
	* Count number of features for a given language
	*
	* @param integer $id_lang Language id
	* @return int Number of feature
	* @static
	*/
	public static function nbFeatures($id_lang)
	{
		$result = Db::getInstance()->getRow('
		SELECT COUNT(ag.`id_feature`) as nb
		FROM `'._DB_PREFIX_.'feature` ag
		LEFT JOIN `'._DB_PREFIX_.'feature_lang` agl ON (ag.`id_feature` = agl.`id_feature` AND `id_lang` = '.(int)($id_lang).')
		ORDER BY `name` ASC');
		return ($result['nb']);
	}
	
	/**
	* Create a feature from import
	*
	* @param integer $id_feature Feature id
	* @param integer $id_product Product id	
	* @param array $value Feature Value		
	*/	
	public static function addFeatureImport($name)
	{
		$rq = Db::getInstance()->getRow('SELECT `id_feature` FROM '._DB_PREFIX_.'feature_lang WHERE `name` = \''.pSQL($name).'\' GROUP BY `id_feature`');
		if (!empty($rq))
			return (int)($rq['id_feature']);
		// Feature doesn't exist, create it
		$feature = new Feature();
		$languages = Language::getLanguages();
		foreach ($languages as $language)
			$feature->name[$language['id_lang']] = strval($name);
		$feature->add();
		return $feature->id;
	}
	
	public static function getFeaturesForComparison($list_ids_product, $id_lang)
	{
		$ids = '';
		foreach($list_ids_product as $id)
			$ids .= (int)($id).',';
			
		$ids = rtrim($ids, ',');
	
		if (empty($ids))
			return false;
			
		return Db::getInstance()->ExecuteS('
		SELECT * , COUNT(*) as nb
		FROM `'._DB_PREFIX_.'feature` f
		LEFT JOIN `'._DB_PREFIX_.'feature_product` fp ON f.`id_feature` = fp.`id_feature`
		LEFT JOIN `'._DB_PREFIX_.'feature_lang` fl ON f.`id_feature` = fl.`id_feature`
		WHERE fp.`id_product` IN ('.$ids.')
		AND `id_lang` = '.(int)($id_lang).'
		GROUP BY f.`id_feature`
		ORDER BY nb DESC');
	}
}