work-in-progress: As a problem author, I would like to be able to edit module metadata

cms/static/coffee/src/models/module.coffee

@@ -3,14 +3,26 @@ class CMS.Models.Module extends Backbone.Model
   defaults:
     data: ''
     children: ''
+    metadata: {}
 
   loadModule: (element) ->
     elt = $(element).find('.xmodule_edit').first()
     @module = XModule.loadModule(elt)
+    # find the metadata edit region which should be setup server side,
+    # so that we can wire up posting back those changes
+    @metadata_elt = $(element).find('.metadata_edit')
 
   editUrl: ->
     "/edit_item?#{$.param(id: @get('id'))}"
 
   save: (args...) ->
     @set(data: @module.save()) if @module
+    # cdodge: package up metadata which is separated into a number of input fields
+    # there's probably a better way to do this, but at least this lets me continue to move onwards
+    if @metadata_elt
+      _metadata = {}
+      # walk through the set of elments which have the 'xmetadata_name' attribute and
+      # build up a object to pass back to the server on the subsequent POST
+      _metadata[el.getAttribute("xmetadata_name")]=el.value for el in $('[xmetadata_name]')
+      @set(metadata: _metadata)
     super(args...)