[WIP] Explore exposable concept

lib/turbo_component.rb

@@ -3,6 +3,7 @@
 require "turbo-rails"
 require "turbo_component/version"
 require "turbo_component/engine"
+require "turbo_component/railtie"
 
 module TurboComponent
   extend ActiveSupport::Autoload
@@ -19,6 +20,7 @@ module Concerns
       autoload :Options
       autoload :Routes
       autoload :Tags
+      autoload :Exposable
     end
   end
 end

lib/turbo_component/concerns/exposable.rb

@@ -0,0 +1,21 @@
+module TurboComponent::Concerns::Exposable
+  extend ActiveSupport::Concern
+
+  included do
+    def self.expose_in_context(method_name)
+      prefix = self.name.deconstantize.underscore
+      module_ref = self
+      exposed_name = "#{prefix}_#{method_name}".to_sym
+
+      ApplicationController.class_eval do
+        define_method exposed_name do
+          module_ref.send(method_name, self)
+        end
+
+        helper_method exposed_name
+      end
+
+      exposed_name
+    end
+  end
+end

lib/turbo_component/railtie.rb

@@ -0,0 +1,12 @@
+module TurboComponent
+  class Railtie < Rails::Railtie
+    # initializer "turbo_component.action_controller" do
+    #   ActiveSupport.on_load(:action_controller) do
+    #     helpers = Dir[Rails.root.join("app", "turbo_components", "**", "*helpers.rb")]
+    #     helpers.each do |helper_file|
+    #       module_name
+    #     end
+    #   end
+    # end
+  end
+end

test/dummy/app/controllers/application_controller.rb

@@ -1,4 +1,5 @@
 # frozen_string_literal: true
 
 class ApplicationController < ActionController::Base
+  Counter::Helpers
 end

test/dummy/app/turbo_components/counter/component_controller.rb

@@ -12,7 +12,11 @@ def increment
     session[:counter] ||= 0
     session[:counter] += 1
 
-    Turbo::StreamsChannel.broadcast_replace_to :counter, targets: "#counter", content: helpers.turbo_component(:counter, async: false)
+    # Since this demo is based on the session, we should scope the broadcast by "session.id"
+    turbo_stream_id = counter_turbo_stream_id
+    Turbo::StreamsChannel.broadcast_replace_to turbo_stream_id, targets: "#counter", content: helpers.turbo_component(:counter, async: false)
+
+    # We don't have to return nothing since we will update the component with Turbo::StreamChannel
     head :ok
   end
 end

test/dummy/app/turbo_components/counter/helpers.rb

@@ -0,0 +1,9 @@
+module Counter::Helpers
+  include TurboComponent::Concerns::Exposable
+
+  def self.turbo_stream_id(context)
+    "#{context.session.id}-counter"
+  end
+
+  expose_in_context :turbo_stream_id
+end

test/dummy/app/views/welcome/show.html.erb

@@ -1,5 +1,5 @@
 <h1> Welcome </h1>
-<%= turbo_stream_from :counter %>
+<%= turbo_stream_from counter_turbo_stream_id %>
 <%= turbo_component :counter, async: false do %>
   loading...
 <% end %>