# Core Sitemap Extensions
module Middleman
  module Sitemap

    # Setup Extension
    class << self

      # Once registered
      def included(app)

        # Set to automatically convert some characters into a directory
        app.config.define_setting :automatic_directory_matcher, nil, 'Set to automatically convert some characters into a directory'

        # Setup callbacks which can exclude paths from the sitemap
        app.config.define_setting :ignored_sitemap_matchers, {
          # dotfiles and folders in the root
          :root_dotfiles => proc { |file| file.start_with?('.') },

          # Files starting with an dot, but not .htaccess
          :source_dotfiles => proc { |file|
            file =~ %r{/\.} && file !~ %r{/\.(htaccess|htpasswd|nojekyll)}
          },

          # Files starting with an underscore, but not a double-underscore
          :partials => proc { |file| file =~ %r{/_[^_]} },

          :layout => proc { |file, app|
            file.start_with?(File.join(app.config[:source], 'layout.')) || file.start_with?(File.join(app.config[:source], 'layouts/'))
          }
        }, 'Callbacks that can exclude paths from the sitemap'

        # Include instance methods
        ::Middleman::TemplateContext.send :include, InstanceMethods
      end

    end

    # Sitemap instance methods
    module InstanceMethods
      def current_path
        @current_locs[:current_path]
      end

      # Get the resource object for the current path
      # @return [Middleman::Sitemap::Resource]
      def current_page
        current_resource
      end

      # Get the resource object for the current path
      # @return [Middleman::Sitemap::Resource]
      def current_resource
        return nil unless current_path
        sitemap.find_resource_by_destination_path(current_path)
      end

    end
  end
end