<?php
class ControllerExtensionFeedGoogleSitemap extends Controller {
	public function index() {
		if ($this->config->get('feed_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');
			$this->load->model('localisation/zone');

			$products = $this->model_catalog_product->getProducts();
			$zones = $this->model_localisation_zone->getZonesByCountryId($this->config->get('config_country_id'));

			if (!$zones) {
				$zones[] = $this->model_localisation_zone->getZone($this->config->get('config_zone_id'));
			}

			foreach ($products as $product) {
				$product_url = $this->url->link('product/product', 'product_id=' . $product['product_id']);

				if (!$this->hasSeoUrl($product_url)) {
					continue;
				}

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

			}

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

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

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

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

		return $output;
	}

	protected function escapeUrl($url) {
		return htmlspecialchars(html_entity_decode($url, ENT_QUOTES, 'UTF-8'), ENT_QUOTES | ENT_XML1, 'UTF-8');
	}

	protected function hasSeoUrl($url) {
		return basename((string)parse_url(str_replace('&amp;', '&', $url), PHP_URL_PATH)) !== 'index.php';
	}
}
