Add menu helper

lib/librarix/application.rb

@@ -1,3 +1,4 @@
+require 'librarix/menu'
 require 'librarix/the_movie_db'
 
 require 'sinatra/base'
@@ -10,7 +11,15 @@ require 'themoviedb'
 
 module Librarix
   class Application < Sinatra::Application
+    def initialize(app = nil)
+      super
+
+      Librarix::Menu.menu.add 'Home', '/'
+      Librarix::Menu.menu.add 'Add a movie', '/search'
+    end
+
     helpers Librarix::TheMovieDB
+    helpers Librarix::Menu::Helper
 
     get '/' do
       slim :index, locals: {movies: Librarix::Redis::Movie.all.sort_by(&:release_date).reverse}

lib/librarix/menu.rb

@@ -0,0 +1,56 @@
+module Librarix
+  class Menu
+    module Helper
+      def menu
+        Librarix::Menu.menu.render request.path_info
+      end
+    end
+
+    def self.menu
+      @menu ||= new
+    end
+
+    attr_accessor :menu
+
+    def initialize
+      self.menu = []
+    end
+
+    def add(name, url)
+      self.menu << Element.new(name, url)
+    end
+
+    def render(path = nil)
+      around menu.map { |elem| elem.render path }.join
+    end
+
+    private
+
+    def around(content)
+      "<ul>#{content}</ul>"
+    end
+
+    class Element
+      attr_accessor :name, :url
+
+      def initialize(name, url)
+        self.name = name
+        self.url = url
+      end
+
+      def render(path = nil)
+        around "<a href=\"#{url}\">#{name}</a>", path: path
+      end
+
+      def current?(path)
+        path == url
+      end
+
+      private
+
+      def around(element, path: nil)
+        "<li#{current?(path) ? ' class="active"' : ''}>#{element}</li>"
+      end
+    end
+  end
+end

lib/librarix/views/layout.slim

@@ -7,4 +7,5 @@ html
     link rel="stylesheet" media="all" href="/application.css"
     script type="text/javascript" src="/application.js"
   body
+    == menu
     == yield