Refactor sources

app/controllers/sources_controller.rb

@@ -1,20 +1,12 @@
 class SourcesController < ApplicationController
   respond_to :json, :xml
-  rescue_from Sources::Site::NoStrategyError, :with => :no_strategy
 
   def show
-    @source = Sources::Site.new(params[:url], :referer_url => params[:ref])
-    @source.get
+    @source = Sources::Strategies.find(params[:url], params[:ref])
 
     respond_with(@source.to_h) do |format|
       format.xml { render xml: @source.to_h.to_xml(root: "source") }
       format.json { render json: @source.to_h.to_json }
     end
   end
-
-protected
-
-  def no_strategy
-    render json: {message: "Unsupported site"}.to_json, status: 400
-  end
 end