omniauth strategy

Gemfile

@@ -47,5 +47,5 @@ end
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
+gem 'omniauth'
 gem 'bigbluebutton-api-ruby'
-

Gemfile.lock

@@ -57,6 +57,7 @@ GEM
     ffi (1.9.14)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
+    hashie (3.4.6)
     i18n (0.7.0)
     jbuilder (2.6.0)
       activesupport (>= 3.0.0, < 5.1)
@@ -82,6 +83,9 @@ GEM
     nio4r (1.2.1)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
+    omniauth (1.3.1)
+      hashie (>= 1.2, < 4)
+      rack (>= 1.0, < 3)
     puma (3.6.0)
     rack (2.0.1)
     rack-test (0.6.3)
@@ -163,6 +167,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   jquery-rails
   listen (~> 3.0.5)
+  omniauth
   puma (~> 3.0)
   rails (~> 5.0.0, >= 5.0.0.1)
   sass-rails (~> 5.0)
@@ -175,4 +180,4 @@ DEPENDENCIES
   web-console
 
 BUNDLED WITH
-   1.13.2
+   1.13.4

app/controllers/application_controller.rb

@@ -1,3 +1,8 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery with: :exception
+
+  def current_user
+    @current_user ||= User.find_by(id: session[:user_id])
+  end
+  helper_method :current_user
 end

app/controllers/sessions_controller.rb

@@ -0,0 +1,17 @@
+class SessionsController < ApplicationController
+  def create
+    @user = User.from_omniauth(request.env['omniauth.auth'])
+    session[:user_id] = @user.id
+  rescue => e
+    logger.error "Error authenticating via omniauth: #{e}"
+  ensure
+    redirect_to root_path
+  end
+
+  def destroy
+    if current_user
+      session.delete(:user_id)
+    end
+    redirect_to root_path
+  end
+end

app/models/user.rb

@@ -0,0 +1,9 @@
+class User < ApplicationRecord
+
+  def self.from_omniauth(auth_hash)
+    user = find_or_create_by(uid: auth_hash['uid'], provider: auth_hash['provider'])
+    user.name = auth_hash['info']['name']
+    user.save!
+    user
+  end
+end

config/routes.rb

@@ -1,5 +1,7 @@
 Rails.application.routes.draw do
   get 'meeting(/:id)', to: 'landing#index'
+  get '/auth/:provider/callback', to: 'sessions#create'
+  get '/logout', to: 'sessions#destroy'
 
   root to: 'landing#index'
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html

db/migrate/20161017160526_create_users.rb

@@ -0,0 +1,15 @@
+class CreateUsers < ActiveRecord::Migration[5.0]
+  def change
+    create_table :users do |t|
+      t.string :provider, null: false
+      t.string :uid, null: false
+      t.string :name
+
+      t.timestamps
+    end
+
+    add_index :users, :provider
+    add_index :users, :uid
+    add_index :users, [:provider, :uid], unique: true
+  end
+end

db/schema.rb

@@ -0,0 +1,26 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20161017160526) do
+
+  create_table "users", force: :cascade do |t|
+    t.string   "provider",   null: false
+    t.string   "uid",        null: false
+    t.string   "name"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["provider", "uid"], name: "index_users_on_provider_and_uid", unique: true
+    t.index ["provider"], name: "index_users_on_provider"
+    t.index ["uid"], name: "index_users_on_uid"
+  end
+
+end

test/fixtures/users.yml

@@ -0,0 +1,11 @@
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  provider: MyString
+  uid: MyString
+  name: MyString
+
+two:
+  provider: MyString
+  uid: MyString
+  name: MyString

test/models/user_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class UserTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end