codepedia / action-cable-chat

ActionCable Example App from my RubyAZ talk.

Build an ActionCable Chat Service

1. New App

   # new rails app
   rails _5.0.0.beta3_ new ac && cd ac
   # initialize Git
   git init && git add .
   # first commit
   git commit -am "initial commit"

2. Generate the Rooms Controller and Message Model

   rails g controller rooms show
   rails g model message content:text
   rails db:migrate
   # commit
   git add .
   git commit -am "Rooms Crontroller and Message Model"

   Add a test message:

   Message.create content: 'hello world'

3. Update the routes to send root to rooms#show

   routes.rb:

   root to: 'rooms#show'

4. Start the server and open the browser and show that the app is up

   rails server

   http://localhost:3000

5. Set up the controller method and message views

   rooms_controller.rb:

   def show
     @messages = Message.all
   end
   

   show.html.erb

   _message.html.erb

   git add .
   git commit -am "Add rooms/message views"

6. Pop open the browser again

   http://localhost:3000

7. Generate our ActionCable room channel with 'speak' action:

   rails g channel room speak

8. Uncomment App in cable.coffee and ActionCable mount in routes.rb

9. Implement received and speak in room.coffee

10. Implement speak in room_channel.rb

    def speak(data)
       ActionCable.server.broadcast 'room_channel', data['message']
     end

    git add .
    git commit -am "ActionCable Enabled"

11. Restart Rails Server and Demo via JS console

12. Add form field and required JavaScript to send messages..

13. Remove

    from room.coffee received method

14. Update channel 'speak' implementation to actually write to the db.

15. Generate Job to handle Broadcasts

    rails g job BroadcastMessage

16. Add after_create_commit hook to send broadcast job.

    after_create_commit { BroadcastMessageJob.perform_later self }

    git add .
    git commit -am "Fin"

17. Restart rails server and demo working ActionCable in browser.

18. Set up devise

    Add to the Gemfile:

    gem 'devise', github: 'plataformatec/devise'

    Install Devise and Generate User Model

    bundle install
    rails g devise:install
    rails g devise User
    rails g migration AddUserToMessages user:references:index
    rails db:migrate
    git add .
    git commit -am "Devise and User Model"

19. Add belongs_to to Message Model:

    message.rb:

    belongs_to :user

20. Update add devise before_action to controller:

    rooms_controller.rb:

    before_action :authenticate_user!

21. Update v2 files

    application.html.erb _message.html.erb room.coffee rooms.coffee show.html.erb

22. Explain current_user, warden config. Add warden hooks:

    Populate: config/initializers/warden_hooks.rb connection.rb

23. Demonstrate in the browser. RESTART SERVER

24. v3 STYLE