Basic channel generator

actioncable/lib/rails/generators/channel/USAGE

+Description:
+============
+    Stubs out a new cable channel and its CoffeeScript assets. Passes the chanel name, either
+    CamelCased or under_scored, and an optional list of channel actions as arguments.
+
+    This generates a channel class in app/channels.
+
+Example:
+========
+    rails generate channel Chat speak
+
+    creates a Chat channel class and CoffeeScript asset:
+        Channel:    app/channels/chat_channel.rb
+        Assets:     app/assets/javascript/channels/chat.coffee

actioncable/lib/rails/generators/channel/channel_generator.rb

+module Rails
+  module Generators
+    class ChannelGenerator < NamedBase
+      source_root File.expand_path("../templates", __FILE__)
+
+      argument :actions, type: :array, default: [], banner: "method method"
+
+      check_class_collision suffix: "Channel"
+
+      def create_channel_file
+        template "channel.rb", File.join('app/channels', class_path, "#{file_name}_channel.rb")
+        template "assets/channel.coffee", File.join('app/assets/javascripts/cable/channels', class_path, "#{file_name}.coffee")
+
+        if self.behavior == :invoke
+          template "application_cable/connection.rb", 'app/channels/application_cable/connection.rb'
+          template "application_cable/channel.rb", 'app/channels/application_cable/channel.rb'
+          template "assets/consumer.coffee", 'app/assets/javascripts/cable/index.coffee'
+        end
+      end
+
+      protected
+        def file_name
+          @_file_name ||= super.gsub(/\_channel/i, '')
+        end
+    end
+  end
+end

actioncable/lib/rails/generators/channel/templates/application_cable/channel.rb

+module ApplicationCable
+  class Channel < ActionCable::Channel::Base
+    # Logic shared between all channels
+  end
+end
\ No newline at end of file

actioncable/lib/rails/generators/channel/templates/application_cable/connection.rb

+module ApplicationCable
+  class Connection < ActionCable::Connection::Base
+    identified_by :current_user
+
+    def connect
+      self.current_user = find_verified_user
+    end
+
+    protected
+      def find_verified_user
+        if current_user = authenticate_with_cookies
+          current_user
+        else
+          reject_unauthorized_connection
+        end
+      end
+
+      def authenticate_with_cookies
+        # User.find(cookies.signed[:user_id])
+      end
+  end
+end

actioncable/lib/rails/generators/channel/templates/assets/channel.coffee

+App.<%= class_name.underscore %> = App.cable.subscriptions.create "<%= class_name %>Channel",
+  connected: ->
+    # Called when the subscription is ready for use on the server
+
+  disconnected: ->
+    # Called when the subscription has been terminated by the server
+
+<% actions.each do |action| -%>
+  <%= action %>: ->
+    @perform '<%= action %>'
+<% end -%>

actioncable/lib/rails/generators/channel/templates/assets/consumer.coffee

+#= require cable
+#= require_self
+#= require ./channels
+
+@App = {}
+App.cable = Cable.createConsumer()

actioncable/lib/rails/generators/channel/templates/channel.rb

+<% module_namespacing do -%>
+class <%= class_name %>Channel < ApplicationChannel
+  def subscribed
+    # stream_from "some_channel"
+  end
+
+  def unsubscribed
+    # Any cleanup needed when channel is unsubscribed
+  end
+<% actions.each do |action| -%>
+
+  def <%= action %>
+  end
+<% end -%>
+end
+<% end -%>