basic draft for actionview-component integration

- Allows updating of specific component without replacing entire
  dom

- could also work without components with selector argument

- in the future, probably a new class that can be
  subclassed can be made available like
  StimulsComponent or so.

- For now, the Reflex class must implement the rendered_component and
  selector methdos, though selector can be left to nil if the entire
  body is to be replaced

lib/stimulus_reflex/channel.rb

@@ -46,10 +46,16 @@ def delegate_call_to_reflex(reflex, method_name, arguments = [])
   end
 
   def render_page_and_broadcast_morph(url, reflex)
-    html = render_page(url, reflex)
-    broadcast_morph url, html if html.present?
+    if reflex.respond_to? :rendered_component
+      broadcast_morph reflex.rendered_component, reflex.selector
+    else
+      html = render_page(url, reflex)
+      broadcast_morph html if html.present?
+    end
   end
 
+
+
   def render_page(url, reflex)
     uri = URI.parse(url)
     url_params = Rails.application.routes.recognize_path(url)
@@ -81,14 +87,25 @@ def render_page(url, reflex)
     controller.response.body
   end
 
-  def broadcast_morph(url, html)
-    html = extract_body_html(html)
-    cable_ready[stream_name].morph selector: "body", html: html, children_only: true
+  def broadcast_morph(html, selector = nil)
+    if selector.present?
+      html = extract_partial_html(html)
+    else
+      html = extract_body_html(html)
+      selector = "body"
+    end
+
+    cable_ready[stream_name].morph selector: selector, html: html, children_only: true
     cable_ready.broadcast
   end
 
+  def extract_partial_html(html)
+    doc = Nokogiri::HTML::DocumentFragment.parse(html)
+    doc.to_s
+  end
+
   def extract_body_html(html)
     doc = Nokogiri::HTML(html)
-    doc.css("body").to_s
+    doc.css("home").to_s
   end
 end