<?php
if (!defined('_PS_VERSION_')) {
    exit;
}

class Ant_Canonical extends Module
{
    public function __construct()
    {
        $this->name = 'ant_canonical';
        $this->tab = 'front_office_features';
        $this->author = 'Antadis';
        $this->version = '1.0';
        $this->need_instance = 0;
        
        parent::__construct();
        
        $this->displayName = $this->l('Canonical');
        $this->description = $this->l('Generate canonical url to remove duplicate content');
    }
    
    public function install()
    {
        // Register hooks
        if(!parent::install()
            || !$this->registerHook('header')) {
                return false;
        }
        
        return true;
    }
    
    public function hookHeader($params)
    {
        global $cookie, $smarty, $page_name, $site_version;
        
        switch ($site_version) {
            case 'es':
                $tld = 'es';
                break;
            case 'com':
            case 'fr':
            default:
                $tld = 'com';
                break;
        }
        
        $domain = Configuration::get('PS_SSL_ENABLED') ?
            Configuration::get('PS_SHOP_DOMAIN_SSL') : Configuration::get('PS_SHOP_DOMAIN');
        $host = str_replace('bebeboutik.com', 'bebeboutik.'.$tld, $domain);
        //$host = (Configuration::get('PS_SSL_ENABLED') ? 'https://' : 'http://').$host;
        $host = 'https://'.$host;
                
        // Page category
        if ($page_name == 'category') {
            $id_category = Tools::getValue('id_category');
            $category = new Category($id_category, $cookie->id_lang);
            if (Validate::isLoadedObject($category)) {
                $smarty->assign(array('url' => $host.'/'.$this->getLinkRewriteCategory($id_category)));
            }
        }
        
        // Page product
        if ($page_name == 'product') {
            $id_product = Tools::getValue('id_product');
            $smarty->assign(array('url' => $host.'/'.$this->getLinkRewriteProduct($id_product)));
        }
        
        return self::display(__FILE__, 'views/front/header.tpl');
    }
    
    /**
     * Real product rewrite link
     * @param int $id
     * @return string
     */
    private function getLinkRewriteProduct($id)
    {
        global $cookie;
        
        $product = new Product($id);
        $link = $this->getLinkRewriteCategory($product->id_category_default, true)
            .'/'.$id.'-'.$product->link_rewrite[$cookie->id_lang];
        
        if (!empty($product->ean13)) {
            $link .= '-' . $product->ean13;
        }
            
        $link .= '.html';
        
        return $link;
    }
    
    /**
     * Real category rewrite link
     * @param int $id
     * @param boolean $product
     * @return string
     */
    private function getLinkRewriteCategory($id, $product = false)
    {
        global $cookie;
        
        if ($product === false) {
            return $id.'-'.Category::getLinkRewrite($id, $cookie->id_lang);
        } else {
            return Category::getLinkRewrite($id, $cookie->id_lang);
        }
    }
    
}