Devolve blanket #require to reveal intent and responsibility

* Move specific requires close to where they're needed.
* Use the private active_support/rails dep to wrap up common needs
  like eager autoload and module delegation.
* Use a single Rails engine rather than an engine and a railtie.
* Prefer `AS::JSON.encode` to `Object#to_json`.

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/action_cable/engine.rb b/lib/action_cable/engine.rb
index 6c943c7971..613a9b99f2 100644
--- a/lib/action_cable/engine.rb
+++ b/lib/action_cable/engine.rb
@@ -1,4 +1,22 @@
+require 'rails/engine'
+require 'active_support/ordered_options'
+
 module ActionCable
   class Engine < ::Rails::Engine
+    config.action_cable = ActiveSupport::OrderedOptions.new
+
+    initializer "action_cable.logger" do
+      ActiveSupport.on_load(:action_cable) { self.logger ||= ::Rails.logger }
+    end
+
+    initializer "action_cable.set_configs" do |app|
+      options = app.config.action_cable
+
+      options.allowed_request_origins ||= "http://localhost:3000" if ::Rails.env.development?
+
+      ActiveSupport.on_load(:action_cable) do
+        options.each { |k,v| send("#{k}=", v) }
+      end
+    end
   end
 end