<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
 *  Sitemap Class
 *  Copyright (c) 2008 - 2013 All Rights Reserved.
 *
 *  Props to Mike's Imagination for the approach
 *  http://www.mikesimagination.net/blog/post/29-Aug-12/Codeigniter-auto-XML-sitemap
 *
 *  Generates sitemap
 */

class Sitemap {

    // CI instance property
  protected $ci;

  /**
   *  Constructor
   */
  public function __construct()
  {
      // Get the CI instance by reference to make the CI superobject available in this library
    $this->ci =& get_instance();
    $this->ci->load->database();
  }

  /**
   *  Generate sitemap
   */
  public function create()
  {
    // Begin assembling the sitemap starting with the header
    $sitemap = "<\x3Fxml version=\"1.0\" encoding=\"UTF-8\"\x3F>\n<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n";

    // Add static pages not in database to sitemap
    // Home page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url() . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>1.00</priority>\n\t</url>\n\n";
    // About page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url('about') . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>0.80</priority>\n\t</url>\n\n";
    // Our Team page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url('our-team') . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>0.80</priority>\n\t</url>\n\n";
    // Services page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url('services') . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>0.80</priority>\n\t</url>\n\n";
    // Blog page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url('blog') . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>0.80</priority>\n\t</url>\n\n";
    // Resources page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url('resources') . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>0.80</priority>\n\t</url>\n\n";
    // Contact page
    $sitemap .= "\t<url>\n\t\t<loc>" . site_url('contact') . "</loc>\n\t\t<lastmod>2021-12-17T06:50:42+00:00</lastmod>\n\t\t<priority>0.80</priority>\n\t</url>\n\n";

     // Get all blog (records) from database. Load (or autoload) the model
    // $this->load->database();
    $services = $this->ci->db->select('*')->from('services')->where('status', '1')->order_by('priority', 'asc')->get()->result();
    $blogs = $this->ci->db->select('*')->from('blog')->where('status', '1')->order_by('publish_date', 'DESC')->get()->result();

    // Add each recipe URL to the sitemap while enclosing the URL in the XML <url> tags
    // Since my database tracks the last updated date, I am including that as well - but with the date only in YYYY-MM-DD format
    foreach($services as $service)
    {
       $sitemap .= "\t<url>\n\t\t<loc>" . site_url('services/' . $service->slug) . "</loc>\n";
       $sitemap .= "\t\t<lastmod><lastmod>2021-12-17T06:50:42+00:00</lastmod></lastmod>\n";
       $sitemap .= "\t\t<priority>0.80</priority>\n \t</url>\n\n";
    }
    foreach($blogs as $blog)
    {
       $sitemap .= "\t<url>\n\t\t<loc>" . site_url('blog/' . $blog->alias_en) . "</loc>\n";
       $sitemap .= "\t\t<lastmod>" . date('c' ,strtotime($blog->updated_at)) . "</lastmod>\n";
       $sitemap .= "\t\t<priority>0.64</priority>\n \t</url>\n\n";
    }

    // If you have other records you wish to include, get those and continue to append URL's to the sitemap.

    // Close with the footer
    $sitemap .= "</urlset>\n";

    // Write the sitemap string to file. Make sure you have permissions to write to this file.
    $file = fopen('sitemap.xml', 'w');
    fwrite($file, $sitemap);
    fclose($file);

    // If this is the production instance, attempt to update Google with the new sitemap.
    // (The instance is set in the index.php file)
    if(ENVIRONMENT === 'production')
    {
      // Ping Google via http request with the encoded sitemap URL
      $sitemap_url = site_url('sitemap.xml');
      $google_url = "http://www.google.com/webmasters/tools/ping?sitemap=".urlencode($sitemap_url);

      $ch = curl_init();
      curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,2);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
      curl_setopt ($ch, CURLOPT_URL, $google_url);
      $response = curl_exec($ch);
      $http_status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

      // Log error if update fails
      if (substr($http_status, 0, 1) != 2)
      {
        log_message('error', 'Ping Google with updated sitemap failed. Status: ' . $http_status);
        log_message('error', '    ' . $google_url);
      }
    }

    return;
  }
}