Ember Pusher

A library for declaratively managing connections to Pusher channels and events in your Ember application.

You are able to connect to different channels and events declaratively as the user traverses through your application. The interface to event handlers are natural methods on your controllers. In fact: The full event bubbling framework is available to the pusher initiated events.

Download

• ember-pusher.js
• ember-pusher.min.js
• ember-pusher.amd.js

Is it good?

Yes

Is it production ready?

I guess? Ship it!

How do I use this thing?

Good question!

First things first: Stick your pusher connection options on your Application object. Anything you pass into the connection hash will be passed in as options to the pusher connection. This is a good place for auth params, and things like that. You can get a list of all the options from Pusher's API.

App = Ember.Application.create({
  PUSHER_OPTS: { key: 'foo', connection: {} }
});

Next, for any controllers that you want to catch pusher events on:

1. Extend EmberPusher.Bindings.
2. Define PUSHER_SUBSCRIPTIONS where the keys are channel names and the values are arrays of events for the channel. If you have dynamic channel names or events, you can totally just construct your PUSHER_SUBSCRIPTIONS hash in init() of your controller. Private channels are fine.
3. Implement your event handlers on the controller.

Logging

There are two ways to setup logging. The first is to log all events which can be accomplished by setting logAllEvents in your PUSHER_OPTS hash:

App = Ember.Application.create({
  PUSHER_OPTS: { key: 'foo', connection: { ... }, logAllEvents: true }
});

The second method of logging, is to set logPusherEvents on the controllers that you're binding. For example:

var YourController = Em.Controller.extend(EmberPusher.Bindings, {
  logPusherEvents: true,
  PUSHER_SUBSCRIPTIONS: {
    myChannel: ['my-event']
  }
});

Note: Things work as expected if you set either of these options at runtime

Example Controller:

var YourController = Em.Controller.extend(EmberPusher.Bindings, {
  PUSHER_SUBSCRIPTIONS: {
    craycray: ['event-one', 'event-two'],
    anotherone: ['event-three']
  },
  actions: {
    eventOne: function(){ console.log("eventOne is working!"); },
    eventTwo: function(){ console.log("eventTwo is working!"); }
    eventThree: function(){ console.log("eventThree is working!"); }
  }
});

Note: The event names have camelize() called on them, so that you can keep your controller's methods looking consistent. Event handlers are tracked and torn down when a controller is destroyed.

That's about it! When events come in, they should be triggered on the listening controllers. It should be noted that event bubbling will all work as expected, so you can actually implement your handlers wherever suits your needs best.

Have fun! Certainly let me know if you see any bugs.

Client Events

In order to send events from the client you will need to enable client events for your Pusher application. In your Ember controllers you must mixin EmberPusher.ClientEvents and call the pusherTrigger method.

Example Controller:

var YourController = Em.Controller.extend(EmberPusher.ClientEvents, {
  actions: {
    sendSomeEvent: function() {
      // Pusher requires that the event be prefixed with 'client-'
      var eventName = 'client-some-event';
      this.pusherTrigger(this.get('channelName'), eventName, this.get('data'));
    }
  }
});

FAQ

My events aren't firing! :'(

Are you sure you've got the right event name on your controller? Do an Em.String.camelize('foo-bar') on your event name. That's what you should have implemented on your controller. Did you make sure to extend EmberPusher.Bindings on the controller(s) you want to catch events on?

Can I connect to a private channel!?

Yes.

What versions of Ember are supported!?

~>1.0.0

Can I bind to channel connection events!?

Indeed.

App.MyController = Ember.Controller.extend(EmberPusher.Bindings, {
  PUSHER_SUBSCRIPTIONS: {
    my-channel: ['pusher:subscription_succeeded']
  },

  actions: {
    'pusher:subscriptionSucceeded': function() {
      console.log("Connected!");
    }
  }
});

What can I bind to for the connection status and socket id!?

You could bind to isConnected and socketId which are both on the pusherController.

App.MyController = Ember.Controller.extend(EmberPusher.Bindings, {
  socketIdChanged: function() {
    console.log("Socket ID changed", this.pusher.get('socketId'));
  }.observes('pusher.socketId').on('init'),

  pusherConnectionStatusChanged: function() {
    console.log("Connection status changed", this.pusher.get('isConnected'));
  }.observes('pusher.isConnected').on('init')
});

Running the tests

grunt test - Runs Mocha tests through PhantomJS

grunt server - Run tests through a browser. Visit http://localhost:8000/test.

Building

grunt build - build 'er

Contributors

@wycats - Architectural advice.