<?php
class ControllerExtensionFeedGoogleSitemap extends Controller {

    public function index() {
        if ($this->config->get('google_sitemap_status')) {
            $output = '<?xml version="1.0" encoding="UTF-8"?>';
            $output .= '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">';

            $this->load->model('catalog/product');
            $this->load->model('tool/image');

            $products = $this->model_catalog_product->getProducts();

            foreach ($products as $product) {
                if ($product['image']) {
                    $output .= '<url>';
                    $output .= '<loc>' . $this->url->link('product/product', 'product_id=' . $product['product_id']) . '</loc>';
                    $output .= '<changefreq>weekly</changefreq>';
                    $output .= '<lastmod>' . date('Y-m-d\TH:i:sP', strtotime($product['date_modified'])) . '</lastmod>';
                    $output .= '<priority>1.0</priority>';
                    $output .= '<image:image>';
                    $output .= '<image:loc>' . $this->model_tool_image->resize($product['image'], $this->config->get($this->config->get('config_theme') . '_image_popup_width'), $this->config->get($this->config->get('config_theme') . '_image_popup_height')) . '</image:loc>';
                    $output .= '<image:caption>' . $product['name'] . '</image:caption>';
                    $output .= '<image:title>' . $product['name'] . '</image:title>';
                    $output .= '</image:image>';
                    $output .= '</url>';
                }
            }

            $this->load->model('catalog/category');

            $output .= $this->getCategories(0);

            $this->load->model('catalog/manufacturer');

            $manufacturers = $this->model_catalog_manufacturer->getManufacturers();

            foreach ($manufacturers as $manufacturer) {
                $output .= '<url>';
                $output .= '<loc>' . $this->url->link('product/manufacturer/info', 'manufacturer_id=' . $manufacturer['manufacturer_id']) . '</loc>';
                $output .= '<changefreq>weekly</changefreq>';
                $output .= '<priority>0.7</priority>';
                $output .= '</url>';

                $products = $this->model_catalog_product->getProducts(array( 'filter_manufacturer_id' => $manufacturer['manufacturer_id'] ));

                foreach ($products as $product) {
                    $output .= '<url>';
                    $output .= '<loc>' . $this->url->link('product/product', 'manufacturer_id=' . $manufacturer['manufacturer_id'] . '&product_id=' . $product['product_id']) . '</loc>';
                    $output .= '<changefreq>weekly</changefreq>';
                    $output .= '<priority>1.0</priority>';
                    $output .= '</url>';
                }
            }

            $this->load->model('catalog/information');

            $informations = $this->model_catalog_information->getInformations();

            foreach ($informations as $information) {
                $output .= '<url>';
                $output .= '<loc>' . $this->url->link('information/information', 'information_id=' . $information['information_id']) . '</loc>';
                $output .= '<changefreq>weekly</changefreq>';
                $output .= '<priority>0.5</priority>';
                $output .= '</url>';
            }

            $output .= '</urlset>';

            $this->response->addHeader('Content-Type: application/xml');
            $this->response->setOutput($output);
        }
    }

    protected function getCategories($parent_id, $current_path = '') {
        $output = '';

        $results = $this->model_catalog_category->getCategories($parent_id);

        foreach ($results as $result) {
            if (!$current_path) {
                $new_path = $result['category_id'];
            } else {
                $new_path = $current_path . '_' . $result['category_id'];
            }

            $output .= '<url>';
            $output .= '<loc>' . $this->url->link('product/category', 'path=' . $new_path) . '</loc>';
            $output .= '<changefreq>weekly</changefreq>';
            $output .= '<priority>0.7</priority>';
            $output .= '</url>';

            $products = $this->model_catalog_product->getProducts(array( 'filter_category_id' => $result['category_id'] ));

            foreach ($products as $product) {
                $output .= '<url>';
                $output .= '<loc>' . $this->url->link('product/product', 'path=' . $new_path . '&product_id=' . $product['product_id']) . '</loc>';
                $output .= '<changefreq>weekly</changefreq>';
                $output .= '<priority>1.0</priority>';
                $output .= '</url>';
            }

            $output .= $this->getCategories($result['category_id'], $new_path);
        }

        return $output;
    }

}