Section 6.3.4: Implemented signing in

Author: Ryan Bigg

ticketee/Gemfile

@@ -29,6 +29,7 @@ gem 'simple_form', '3.1.0.rc2'
 
 # Use ActiveModel has_secure_password
 gem 'bcrypt', '~> 3.1.9'
+gem 'warden', '~> 1.2.3'
 
 # Use Unicorn as the app server
 # gem 'unicorn'

ticketee/Gemfile.lock

@@ -175,6 +175,8 @@ GEM
     uglifier (2.5.3)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
+    warden (1.2.3)
+      rack (>= 1.0)
     web-console (2.0.0.beta4)
       activemodel (~> 4.0)
       binding_of_caller (= 0.7.3.pre1)
@@ -205,4 +207,5 @@ DEPENDENCIES
   sqlite3
   turbolinks
   uglifier (>= 1.3.0)
+  warden (~> 1.2.3)
   web-console (~> 2.0.0.beta4)

ticketee/app/assets/javascripts/sessions.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://coffeescript.org/

ticketee/app/assets/stylesheets/application.css.scss

@@ -47,3 +47,14 @@ a.delete {
 .alert-alert {
   @extend .alert-danger;
 }
+
+.form {
+  input[type=text], input[type=password] {
+    @extend .form-control;
+  }
+
+  input[type=submit] {
+    @extend .btn;
+    @extend .btn-primary;
+  }
+}

ticketee/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/

ticketee/app/controllers/application_controller.rb

@@ -2,4 +2,16 @@ class ApplicationController < ActionController::Base
   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
+
+  private
+
+  def current_user
+    @current_user ||= env['warden'].user
+  end
+  helper_method :current_user
+
+  def signed_in?
+    env["warden"].authenticated?
+  end
+  helper_method :signed_in?
 end

ticketee/app/controllers/sessions_controller.rb

@@ -0,0 +1,12 @@
+class SessionsController < ApplicationController
+  def create
+    if env['warden'].authenticate
+      flash[:notice] = "Signed in successfully."
+
+      redirect_to root_url
+    else
+      flash[:alert] = "Invalid email or password."
+      render :new
+    end
+  end
+end

ticketee/app/helpers/sessions_helper.rb

@@ -0,0 +1,2 @@
+module SessionsHelper
+end

ticketee/app/models/user.rb

@@ -1,3 +1,8 @@
 class User < ActiveRecord::Base
   has_secure_password
+
+  def self.authenticate(email, password)
+    user = find_by(email: email)
+    return user if user && user.authenticate(password)
+  end
 end

ticketee/app/views/layouts/application.html.erb

@@ -27,6 +27,9 @@
           <li class='<%= 'active' if current_page?('/users/sign_up') %>'>
             <%= link_to "Sign up", sign_up_path %>
           </li>
+          <li class='<%= 'active' if current_page?('/users/sign_in') %>'>
+            <%= link_to "Sign in", sign_in_path %>
+          </li>
         </ul>
       </div>
     </nav>