Unify controller action for destroying an action into the todo controller and lay some groundwork for similar requests coming from different views. Fixes #343.

git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@300 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/lib/source_view.rb

@@ -0,0 +1,48 @@
+# Inspiration from Bruce Williams [http://codefluency.com/articles/2006/07/01/rails-views-getting-in-context/]
+module Tracks
+  
+  module SourceViewSwitching
+  
+    class Responder
+      
+      def initialize(source_view)
+        @source_view = source_view.underscore.gsub(/\s+/,'_').to_sym rescue nil
+      end
+      
+      def nil?
+        yield if @source_view.nil? && block_given?
+      end
+      
+      def method_missing(check_source_view,*args)
+        yield if check_source_view == @source_view && block_given?
+      end
+      
+    end
+  
+    module Controller
+      
+      def self.included(base)
+        base.send(:helper, Tracks::SourceViewSwitching::Helper)
+        base.send(:helper_method, :source_view)
+      end
+  
+      def source_view
+        responder = Tracks::SourceViewSwitching::Responder.new(params[:_source_view])
+        block_given? ? yield(responder) : responder
+      end
+    
+    end
+  
+    module Helper
+      
+      def source_view_tag(name)
+        hidden_field_tag :_source_view, name.underscore.gsub(/\s+/,'_')
+      end
+
+    end
+  
+  end
+  
+end
+
+ActionController::Base.send(:include, Tracks::SourceViewSwitching::Controller)