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Author: akai

app/assets/javascripts/application.js

@@ -12,4 +12,5 @@
 //
 //= require jquery
 //= require jquery_ujs
+//= require bootstrap-dropdown
 //= require_tree .

app/assets/javascripts/sessions.js.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

app/assets/stylesheets/sessions.css.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the Sessions controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/application_controller.rb

@@ -1,3 +1,4 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
+  include SessionsHelper
 end

app/controllers/sessions_controller.rb

@@ -0,0 +1,20 @@
+class SessionsController < ApplicationController
+  def new
+  end
+
+  def create
+    user = User.find_by_email(params[:session][:email].downcase)
+    if user && user.authenticate(params[:session][:password])
+      sign_in user
+      redirect_to user
+    else
+      flash.now[:error] = 'Invalid email/password combination'
+      render 'new'
+    end
+  end
+
+  def destroy
+    sign_out
+    redirect_to root_url
+  end
+end

app/controllers/users_controller.rb

@@ -10,6 +10,7 @@ def new
   def create
     @user = User.new(params[:user])
     if @user.save
+      sign_in @user
       flash[:success] = "Welcome to the Sample App!"
       redirect_to @user
     else

app/helpers/sessions_helper.rb

@@ -0,0 +1,23 @@
+module SessionsHelper
+  def sign_in(user)
+    cookies.permanent[:remember_token] = user.remember_token
+    self.current_user = user
+  end
+
+  def signed_in?
+    !current_user.nil?
+  end
+
+  def current_user=(user)
+    @current_user = user
+  end
+
+  def current_user
+    @current_user ||= User.find_by_remember_token(cookies[:remember_token])
+  end
+
+  def sign_out
+    self.current_user = nil
+    cookies.delete(:remember_token)
+  end
+end

app/models/user.rb

@@ -3,11 +3,18 @@ class User < ActiveRecord::Base
   has_secure_password
 
   before_save { self.email.downcase }
+  before_save :create_remember_token
 
   validates :name,  presence: true, length: { maximum: 50 }
   VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
   validates :email, presence: true, format: { with: VALID_EMAIL_REGEX },
                     uniqueness: { case_sensitive: false }
   validates :password, presence: true, length: { minimum: 6 }
   validates :password_confirmation, presence: true
+
+  private
+
+    def create_remember_token
+      self.remember_token = SecureRandom.urlsafe_base64
+    end
 end

app/views/layouts/_header.html.erb

@@ -1,12 +1,29 @@
 <header class="navbar navbar-fixed-top navbar-inverse">
   <div class="navbar-inner">
     <div class="container">
-      <%= link_to "sample app", '#', id: "logo" %>
+      <%= link_to "sample app", root_path, id: "logo" %>
       <nav>
         <ul class="nav pull-right">
           <li><%= link_to "Home",    root_path %></li>
           <li><%= link_to "Help",    help_path %></li>
-          <li><%= link_to "Sign in", '#' %></li>
+          <% if signed_in? %>
+            <li><%= link_to "Users", '#' %></li>
+            <li id="fat-menu" class="dropdown">
+              <a href="#" class="dropdown-toggle" data-toggle="dropdown">
+                Account <b class="caret"></b>
+              </a>
+              <ul class="dropdown-menu">
+                <li><%= link_to "Profile", current_user %></li>
+                <li><%= link_to "Settings", '#' %></li>
+                <li class="divider"></li>
+                <li>
+                  <%= link_to "Sign out", signout_path, method: "delete" %>
+                </li>
+              </ul>
+            </li>
+          <% else %>
+            <li><%= link_to "Sign in", signin_path %></li>
+          <% end %>
         </ul>
       </nav>
     </div>

app/views/layouts/application.html.erb

@@ -10,7 +10,7 @@
   <%= render 'layouts/header' %>
   <div class="container">
     <% flash.each do |key, value| %>
-      <%= content_for(:div, value, class: "alert alert-#{key}") %>
+      <%= content_tag(:div, value, class: "alert alert-#{key}") %>
     <% end %>
     <%= yield %>
     <%= render 'layouts/footer' %>