omniauth controller & google auth

app/assets/stylesheets/omniauth.scss

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

app/controllers/omniauth_controller.rb

@@ -0,0 +1,20 @@
+class OmniauthController < ApplicationController
+
+	def google_oauth2
+		@user = User.create_from_google_data(request.env['omniauth.auth'])
+		if @user.persisted?
+			sign_in_and_redirect @user
+			set_flash_message(:notice, :success, kind: 'Google') if is_navigation_format?
+		else
+			flash[:error] = 'There was a problem signing you in through Google, Please register or try signing in later.'
+			redirect_to new_user_registration_url
+		end
+	end
+
+	def failure
+		flash[:error] = 'There was a problem signing you in through Google, Please register or try signing in later.'
+			redirect_to new_user_registration_url
+		end
+	end
+
+end

app/helpers/omniauth_helper.rb

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

app/models/user.rb

@@ -1,12 +1,20 @@
-class User < ApplicationRecord
+ class User < ApplicationRecord
   # Include default devise modules. Others available are:
   # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
   devise :database_authenticatable, :registerable,
-         :recoverable, :rememberable, :validatable
+         :recoverable, :rememberable, :validatable,
+         :omniauthable, omniauth_providers: [:google_oauth2]
 
 	has_many :ratings
 	has_many :rated_games, through: :ratings, source: :game
 
 	#but also user has created many games to the list
 	has_many :games 
+
+	def self.create_from_provider_data(provider_data)
+		where(provider: provider_data.provider, uid: provider_data.uid).first_or_create do |user|
+			user.email = provider_data.info.email
+			user.password =Devise.friendly_token[0, 20]
+		end
+	end
 end

config/routes.rb

@@ -1,5 +1,5 @@
 Rails.application.routes.draw do
-	 devise_for :users
+	 devise_for :users, controllers: {omniauth_callbacks: 'omniauth'}
 	root 'home#index'
 
   resources :users
@@ -9,7 +9,6 @@
   resources :ratings
   resources :platforms
 
- get '/auth/:provider/callback' => 'sessions#omniauth'
 
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
 end

db/migrate/20201015105146_update_users.rb

@@ -0,0 +1,6 @@
+class UpdateUsers < ActiveRecord::Migration[6.0]
+  def change
+  	add_column(:users, :provider, :string, limit: 50, null: false, default: '')
+  	add_column(:users, :uid, :string, limit: 500, null: false, default: '')
+  end
+end

db/migrate/20201015105418_create_sessions.rb

@@ -0,0 +1,11 @@
+class CreateSessions < ActiveRecord::Migration[6.0]
+  def change
+    create_table :sessions do |t|
+    	t.string :session_id, null: false
+    	t.text :data
+    	t.timestamps
+    end
+    add_index :sessions, :session_id, unique: true
+    add_index :sessions, :updated_at
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_10_11_022940) do
+ActiveRecord::Schema.define(version: 2020_10_15_105418) do
 
   create_table "games", force: :cascade do |t|
     t.string "title"
@@ -41,6 +41,15 @@
     t.index ["user_id"], name: "index_ratings_on_user_id"
   end
 
+  create_table "sessions", force: :cascade do |t|
+    t.string "session_id", null: false
+    t.text "data"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["session_id"], name: "index_sessions_on_session_id", unique: true
+    t.index ["updated_at"], name: "index_sessions_on_updated_at"
+  end
+
   create_table "users", force: :cascade do |t|
     t.string "username"
     t.datetime "created_at", precision: 6, null: false
@@ -50,6 +59,8 @@
     t.string "reset_password_token"
     t.datetime "reset_password_sent_at"
     t.datetime "remember_created_at"
+    t.string "provider", limit: 50, default: "", null: false
+    t.string "uid", limit: 500, default: "", null: false
     t.index ["email"], name: "index_users_on_email", unique: true
     t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
   end

test/controllers/omniauth_controller_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class OmniauthControllerTest < ActionDispatch::IntegrationTest
+  # test "the truth" do
+  #   assert true
+  # end
+end