add parameter to REST api for todos to limit result to active todos. Fixes #1388

app/controllers/todos_controller.rb

@@ -47,7 +47,10 @@ class TodosController < ApplicationController
         headers['Content-Type']=Mime::TEXT.to_s
         render :content_type => Mime::TEXT
       end
-      format.xml   { render :xml => @todos.to_xml( *todo_xml_params ) }
+      format.xml do
+        @xml_todos = params[:limit_to_active_todos] ? @not_done_todos : @todos
+        render :xml => @xml_todos.to_xml( *todo_xml_params ) 
+      end
       format.any(:rss, :atom) { @feed_title, @feed_description = 'Tracks Actions', "Actions for #{current_user.display_name}" }
       format.ics
     end

app/views/integrations/rest_api.html.erb

@@ -79,6 +79,15 @@ field to <code>ID, created_at, modified_at, completed_at</code> by adding the pa
 </code>
 </pre>
 
+If you only want to get the active todos, you add the parameter <code>limit_to_active_todos</code> and set it to some value like this:
+
+<pre>
+<code>
+  $ curl -u username:p4ssw0rd -H "Content-Type: text/xml" \
+  <%= root_url %>todos.xml?limit_to_active_todos=1
+</code>
+</pre>
+
 <h2>Writing to the API</h2>
 
 <p>The API provides mechanisms for adding, updating and deleting resources using the HTTP methods <code>PUT</code>, <code>POST</code> and <code>DELETE</code> in combination with the content.</p>