class Middleman::Sitemap::Resource

def add_metadata(metadata={}, &block)
  metadata = metadata.dup
  @local_metadata[:blocks] += metadata.delete(:blocks) if metadata.key?(:blocks)
  @local_metadata.deep_merge!(metadata)
  @local_metadata[:blocks] += [block] if block_given?
end

def binary?
  ::Middleman::Util.binary?(source_file)
end

def ext
  File.extname(path)
end

def initialize(store, path, source_file=nil)
  @store       = store
  @app         = @store.app
  @path        = path.gsub(' ', '%20') # handle spaces in filenames
  @source_file = source_file
  @destination_path = @path
  @local_metadata = { options: {}, locals: {}, page: {}, blocks: [] }
end

def metadata
  result = store.metadata_for_path(path).dup
  file_meta = store.metadata_for_file(source_file).dup
  result[:blocks] += file_meta.delete(:blocks) if file_meta.key?(:blocks)
  result.deep_merge!(file_meta)
  local_meta = @local_metadata.dup
  result[:blocks] += local_meta.delete(:blocks) if local_meta.key?(:blocks)
  result.deep_merge!(local_meta)
  result[:blocks] = result[:blocks].flatten.compact
  result
end

def render(opts={}, locs={}, &block)
  return app.template_data_for_file(source_file) unless template?
  relative_source = Pathname(source_file).relative_path_from(Pathname(app.root))
  instrument 'render.resource', path: relative_source, destination_path: destination_path  do
    md   = metadata.dup
    opts = md[:options].deep_merge(opts)
    # Pass "renderer_options" hash from frontmatter along to renderer
    if md[:page]['renderer_options']
      opts[:renderer_options] = {}
      md[:page]['renderer_options'].each do |k, v|
        opts[:renderer_options][k.to_sym] = v
      end
    end
    locs = md[:locals].deep_merge(locs)
    # Forward remaining data to helpers
    app.data.store('page', md[:page]) if md.key?(:page)
    blocks = Array(md[:blocks]).dup
    blocks << block if block_given?
    app.current_path ||= destination_path
    # Certain output file types don't use layouts
    unless opts.key?(:layout)
      opts[:layout] = false if %w(.js .json .css .txt).include?(ext)
    end
    app.render_template(source_file, locs, opts, blocks)
  end
end

def request_path
  destination_path
end

def source_file
  @source_file || get_source_file
end

def template?
  return false if source_file.nil?
  !::Tilt[source_file].nil?
end

def url
  url_path = destination_path
  if app.strip_index_file
    url_path = url_path.sub(/(^|\/)#{Regexp.escape(app.index_file)}$/,
                            app.trailing_slash ? '/' : '')
  end
  File.join(app.respond_to?(:http_prefix) ? app.http_prefix : '/', url_path)
end