sitemap.xml.builder

# encoding: utf-8
xml.instruct!

xml.urlset "xmlns" => "http://www.sitemaps.org/schemas/sitemap/0.9" do
  page_count = 0
  sitemap.resources.each do |page|
    catch :next_page do

      # Exclude images, metadata, config, ...
      throw :next_page if page.url.start_with?('/images/')
      throw :next_page if page.url.start_with?('/javascripts/')
      throw :next_page if page.url.start_with?('/stylesheets/')
      throw :next_page if page.url.start_with?('/layouts/')
      throw :next_page if page.url.start_with?('/fonts/')
      throw :next_page if page.url.start_with?('/apple-touch-icon')
      throw :next_page if page.url.end_with?('.xml')
      throw :next_page if page.url.start_with?('/.')   # .htaccess, .DS_Store, .git etc.
      throw :next_page if page.url == '/robots.txt'
      throw :next_page if page.url == '/favicon.ico'
      throw :next_page if page.url == '/favicon.png'
      throw :next_page if page.url == '/humans.txt'
      throw :next_page if page.url.include?('404.html')

      # Exclude blog and help sites?
      throw :next_page if page.url.start_with?('/blog/')
      throw :next_page if page.url.start_with?('/help/')

      # Exclude drafts
      throw :next_page if defined?(page.data) && page.data['published'] == false
      throw :next_page if defined?(page.data) && page.data['date'] && page.data['date'].to_time > Time.now

      # Count pages
      page_count += 1
      raise "Over 50 000 pages, too much for a single sitemap" if page_count > 50000

      # Build xml of sitemap
      xml.url do
        xml.loc 'http://www.hockeyapp.net' + page.url

        case page.url
          when '/index.html'
            xml.changefreq 'daily'
          else
            # Setting last modified (lastmod)
            #
            # Checks date in frontmatter and modification date of file, and uses the most recent.
            # (Note: Will not be able to get the correct date for pages with dynamic content)
            frontmatter_date = nil
            frontmatter_date = page.data['date'].to_time.getlocal if defined?(page.data) && page.data['date']
            file_mtime = nil
            file_mtime = File.mtime(page.source_file).to_time.getlocal if defined?(page.source_file)
            most_recent = [frontmatter_date, file_mtime].compact.max if  frontmatter_date || file_mtime

            xml.lastmod most_recent.strftime("%Y-%m-%d")  # Using the more recent of the two dates.
                                                          # Using only date, stripping clock
        end

        # Priority (priority)
        #
        # To adjust the priority of a page, set sitemap_priority: in the frontmatter.
        frontmatter_sitemap_priority = page.data['sitemap_priority'].to_f if (defined?(page.data) && page.data['sitemap_priority'])
        if frontmatter_sitemap_priority && frontmatter_sitemap_priority < 0 && frontmatter_sitemap_priority > 1
          raise "Incorrect sitemap_priority #{sitemap_priority} for #{page.destination_path}"
        end
        if frontmatter_sitemap_priority && frontmatter_sitemap_priority >= 0 && frontmatter_sitemap_priority <= 1
          xml.priority frontmatter_sitemap_priority unless frontmatter_sitemap_priority == 0.5 # (No use setting the default priority)
        end

      end
    end
  end
end