I'm trying to replicate a push notification system similar to facebook's using private_pub. Ideally I would want to link this to show notifications using a gem such as gritter (other gem suggestions are welcome)
Whenever a certain action from a controller is called, I want to send a notification to all subscribers that are part of a specific id. As long you are logged in, you are subscribed to the channel, achieved by putting the subscribe_to
in the layouts.
in the view:
<%= subscribe_to "/messages/#{@group_id}" %>
in the controller
PrivatePub.publish_to("/messages/#{@group_id}", "alert('test')")
this works just fine, however I would like to have something more sophisticated than an alert
as a response (such as a gritter notification), so instead:
PrivatePub.publish_to("/messages/#{@group_id}", data: @some_data)
Following the tutorial, they use coffeescript for this. However, I cannot get the simple alert going (probably due to the id in the channel)
In this question, the OP was able to solve this using a js.erb view. But I can't get it to work.
disclaimer: my js and coffeescript knowledge is almost zero.
Any help is appreciated :)
EDIT
Some more info: I've a method in a controller that's part of a public API, and expects POST request. If everything is ok it sends out a JSON success response. Aside from this, the same method sends a notification to all users of a specific group.
I've actually managed to get this working, putting this in the controller:
callback method:
respond_to do |format|
format.js #-> calls callback.js.erb
#format.json { render json: {"success" => true}.to_json }
end
and putting the gritter stuff in my_api_controller/callback.js.erb
:
<% publish_to "/messages/#{@group_id}" do %>
<%= add_gritter(
"Nova " + link_to("reserva", reservation_path(@r)) + " de #{@channel} para " +
link_to(@hostel_name, hostel_path(@hostel_id)),
:title => "Nova reserva!",
:sticky => true,
:image => :notice
) %>
<% end %>
note: since the subscription to the channel is done in every view (through the layout), you can receive a notification on any page/view
My problem at the momento is, as you can guess, the JSON response. Since I cant render two responses, only the js.erb is called, but the JSON response is never sent
I was able to accomplish this by directly adding the gritter script in the
publish_to
method of Privat pub.In my controller:
Basically, I was able to publish to PrivatePub witouth resorting to the html response, wich enabled me to return a JSON response as intended.