Migrate from .on, .once to .listenTo, .listenToOnce

app/lib/LevelLoader.coffee

@@ -60,13 +60,13 @@ module.exports = class LevelLoader extends CocoClass
     # Unless you specify cache:false, sometimes the browser will use a cached session
     # and players will 'lose' code
     @session.fetch({cache:false})
-    @session.once 'sync', @onSessionLoaded, @
+    @listenToOnce(@session, 'sync', @onSessionLoaded)
 
     if @opponentSessionID
       @opponentSession = new LevelSession()
       @opponentSession.url = "/db/level_session/#{@opponentSessionID}"
       @opponentSession.fetch()
-      @opponentSession.once 'sync', @onSessionLoaded, @
+      @listenToOnce(@opponentSession, 'sync', @onSessionLoaded)
 
   sessionsLoaded: ->
     return true if @headless
@@ -82,8 +82,8 @@ module.exports = class LevelLoader extends CocoClass
   # Supermodel (Level) Loading
 
   loadLevelModels: ->
-    @supermodel.on 'loaded-one', @onSupermodelLoadedOne, @
-    @supermodel.once 'error', @onSupermodelError, @
+    @listenTo(@supermodel, 'loaded-one', @onSupermodelLoadedOne)
+    @listenToOnce(@supermodel, 'error', @onSupermodelError)
     @level = @supermodel.getModel(Level, @levelID) or new Level _id: @levelID
     levelID = @levelID
     headless = @headless

app/models/SuperModel.coffee

@@ -9,8 +9,8 @@ class SuperModel
     @mustPopulate = model
     model.saveBackups = @shouldSaveBackups(model)
     model.fetch() unless model.loaded or model.loading
-    model.once('sync', @modelLoaded, @) unless model.loaded
-    model.once('error', @modelErrored, @) unless model.loaded
+    @listenTo(model, 'sync', @modelLoaded) unless model.loaded
+    @listenToOnce(model, 'error', @modelErrored) unless model.loaded
     url = model.url()
     @models[url] = model unless @models[url]?
     @modelLoaded(model) if model.loaded
@@ -30,7 +30,7 @@ class SuperModel
     schema = model.schema()
     unless schema.loaded
       @schemas[schema.urlRoot] = schema
-      return schema.once('sync', => @modelLoaded(model))
+      return @listenToOnce(schema, 'sync', -> @modelLoaded(model))
     refs = model.getReferencedModels(model.attributes, schema.attributes, '/', @shouldLoadProjection)
     refs = [] unless @mustPopulate is model or @shouldPopulate(model)
 #    console.log 'Loaded', model.get('name')
@@ -40,7 +40,7 @@ class SuperModel
       continue if @models[refURL]
       @models[refURL] = ref
       ref.fetch()
-      ref.once 'sync', @modelLoaded, @
+      @listenToOnce(ref, 'sync', @modelLoaded)
 
     @trigger 'loaded-one', model: model
     @trigger 'loaded-all' if @finished()

app/views/account/wizard_settings_view.coffee

@@ -24,7 +24,7 @@ module.exports = class WizardSettingsView extends CocoView
     @wizardThangType = new ThangType()
     @wizardThangType.url = -> '/db/thang.type/wizard'
     @wizardThangType.fetch()
-    @wizardThangType.once 'sync', @initCanvas, @
+    @listenToOnce(@wizardThangType, 'sync', @initCanvas)
 
   initCanvas: ->
     @startsLoading = false

app/views/editor/thang/colors_tab_view.coffee

@@ -11,8 +11,8 @@ module.exports = class ColorsTabView extends CocoView
   offset: 0
 
   constructor: (@thangType, options) ->
-    @thangType.once 'sync', @tryToBuild, @
-    @thangType.schema().once 'sync', @tryToBuild, @
+    @listenToOnce(@thangType, 'sync', @tryToBuild)
+    @listenToOnce(@thangType.schema(), 'sync', @tryToBuild)
     @colorConfig = { hue: 0, saturation: 0.5, lightness: 0.5 }
     @spriteBuilder = new SpriteBuilder(@thangType)
     f = =>

app/views/play/level/modal/victory_modal.coffee

@@ -38,8 +38,8 @@ module.exports = class VictoryModal extends View
     @feedback = new LevelFeedback()
     @feedback.url = -> url
     @feedback.fetch()
-    @feedback.once 'sync', => @onFeedbackLoaded()
-    @feedback.once 'error', => @onFeedbackNotFound()
+    @listenToOnce(@feedback, 'sync', -> @onFeedbackLoaded())
+    @listenToOnce(@feedback, 'error', -> @onFeedbackNotFound())
 
   onFeedbackLoaded: ->
     @feedback.url = -> '/db/level.feedback/' + @id