Permitting Google logins

Gemfile

@@ -20,7 +20,7 @@ gem 'less-rails'
 gem 'devise'
 gem 'omniauth'
 gem 'omniauth-oauth'
-# gem 'omniauth-google-oauth2'
+gem 'omniauth-openid'
 
 # use Nokogiri to parse the exercise files
 gem 'nokogiri'

app/controllers/profile_controller.rb

@@ -22,7 +22,7 @@ def update
       return 
     end
     @user = current_user
-    @user.email = params[:email] 
+    # @user.email = params[:email] 
     @user.location = params[:location]
     @user.gender = params[:gender]
     year, month, day = params[:year].to_i, params[:month].to_i, params[:day].to_i

app/controllers/users/omniauth_callbacks_controller.rb

@@ -12,6 +12,18 @@ def coursera
     end
   end
 
+  def google
+    @user = User.find_for_open_id(request.env["omniauth.auth"], current_user)
+
+    if @user.persisted?
+      flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Google"
+      sign_in_and_redirect @user, :event => :authentication
+    else
+      session["devise.google_data"] = request.env["omniauth.auth"]
+      redirect_to new_user_registration_url
+    end
+  end
+
   # This is necessary since Rails 3.0.4
   # See https://github.com/intridea/omniauth/issues/185
   # and http://www.arailsdemo.com/posts/44

app/models/user.rb

@@ -46,6 +46,21 @@ def self.find_for_coursera(access_token, signed_in_resource=nil)
     user
   end
 
+  def self.find_for_open_id(access_token, signed_in_resource=nil)
+    data = access_token.info
+    File.open("dump.txt",'w') do |f|
+      f.puts data
+    end
+
+    if user = User.where(:email => data["email"]).first
+      user
+    else
+      User.create!(:name => data["name"],
+                   :email => data["email"],
+                   :password => Devise.friendly_token[0,20])
+    end
+  end
+
   #################################################################
   # some methods for computing simple statistics for badges
   def total_hints_requested

app/views/layouts/application.html.erb

@@ -45,7 +45,8 @@
                 </ul>
               </li>
             <% else %>
-              <li class=""><%= link_to raw("<i class='icon-signin'></i> Login"), user_omniauth_authorize_path(:coursera) %></li>
+              <li class=""><%= link_to raw("<i class='icon-signin'></i> Login via Coursera"), user_omniauth_authorize_path(:coursera) %></li>
+              <li class=""><%= link_to raw("<i class='icon-signin'></i> Login via Google"), user_omniauth_authorize_path(:google) %></li>
             <% end %>
           </ul>
         </div><!--/.nav-collapse -->

app/views/profile/edit.html.erb

@@ -2,8 +2,10 @@
   <fieldset>
     <legend>Edit Profile</legend>
 
+    <!-- cannot edit email 
     <%= label_tag :email %>
     <%= text_field_tag :email, @user.email %>
+    -->
 
     <%= label_tag :location %>
     <%= text_field_tag :location, @user.location %>

config/initializers/devise.rb

@@ -208,6 +208,12 @@
 
   require "omniauth-coursera"
   config.omniauth :coursera, 'db127b155312155233e6e5da331adfed38f96e4f', 'f4e61cf7794c5c703b8aa714d6cc4acca42c76ee'
+  config.omniauth :open_id, :name => 'google', :identifier => 'https://www.google.com/accounts/o8/id'
+
+#  require "omniauth-google-oauth2"
+#  config.omniauth :google_oauth2, "477602199932.apps.googleusercontent.com", "7D754R-1H2TL0IQ37Qw4hPvO"
+
+#, { access_type: "offline", approval_prompt: "" }
 
   # ==> Warden configuration
   # If you want to use other strategies, that are not supported by Devise, or

config/initializers/omniauth.rb

@@ -1,3 +1,8 @@
 Rails.application.config.middleware.use OmniAuth::Builder do
 #  provider :developer unless Rails.env.production?
+#  provider :google_oauth2, ENV["GOOGLE_KEY"], ENV["GOOGLE_SECRET"]
+#    {
+#      :scope => "userinfo.email,userinfo.profile,analytics.readonly",
+#      :approval_prompt => "auto"
+#    }
 end

config/routes.rb

@@ -1,4 +1,5 @@
 Assessor::Application.routes.draw do
+
   # You can have the root of your site routed with "root"
   # just remember to delete public/index.html.
   root :to => 'home#index'
@@ -27,6 +28,8 @@
   resources :handouts
   resources :videos
 
+  get "lectures/" => "lectures#index"
+
   # The priority is based upon order of creation:
   # first created -> highest priority.