<?php
class Filtervp extends Module {
    const FILTER_ID = 75;
	const FILTER_SIZE = 272;

	public function __construct() {
		$this->name = 'filtervp';
		$this->tab = 'front_office_features';
		$this->version = '1.0';

        parent::__construct();

        $this->displayName = $this->l('Filter by size');
        $this->description = $this->l('Enable to filter by size in VP.');
    }

    public function install() {
		if(!parent::install()
		OR !$this->registerHook('displayLeftVP')) {
			return FALSE;
		}

		return TRUE;
	}

    public function hookdisplayLeftVP($params) {
		global $smarty;
		$sizes = self::getAllValueAttr(Filtervp::FILTER_ID, Tools::getValue('id_category'));

        if (empty($sizes)) {
            $sizes = self::getAllValueAttr(self::FILTER_SIZE, Tools::getValue('id_category'));
            $name = self::getAttrName(self::FILTER_SIZE);
        } else {
            $name = self::getAttrName(self::FILTER_ID);
        }

        if($name == 'Tailles') { 
            $name = 'Taille';
        };
        
        $smarty->assign(array(
            'name' => $name,
            'sizes' => $sizes,
        ));

		return $this->display(__FILE__, 'filter.tpl');
	}

  	public static function getAllValueAttr($id_attr, $id_cat){ 
      	global $cookie;
		
		$id_lang = $cookie->id_lang;
        $results = Db::getInstance()->ExecuteS('
            SELECT             
                al.`name`, 
                a.`id_attribute`
            FROM
                `'._DB_PREFIX_.'attribute` a
                INNER JOIN '._DB_PREFIX_.'attribute_lang al ON al.id_lang = "'.$id_lang.'" AND al.id_attribute = a.id_attribute
                INNER JOIN '._DB_PREFIX_.'category_product cp ON cp.id_category = "'.$id_cat.'"
                LEFT JOIN '._DB_PREFIX_.'product p ON cp.id_product = p.id_product
                INNER JOIN '._DB_PREFIX_.'product_attribute pa ON pa.id_product = cp.id_product
                INNER JOIN '._DB_PREFIX_.'product_attribute_combination pac ON pac.id_attribute = a.id_attribute AND pac.id_product_attribute = pa.id_product_attribute
            WHERE 
                a.id_attribute_group = "'.$id_attr.'"                  
            GROUP BY
                a.`id_attribute`
            ORDER BY
                al.`name` ASC  
        ');
        return $results;
    }

    public static function getAttrName($id_attr){ 
        global $cookie;
        $id_lang = $cookie->id_lang;
        return Db::getInstance()->getValue('   
            SELECT 
                `public_name` 
            FROM `'._DB_PREFIX_.'attribute_group_lang` 
            WHERE `id_attribute_group` = "'.(int)$id_attr.'"
            AND `id_lang` = "'.(int)$id_lang.'"
        ');
    }


}