window.userStats updating on vote, changes exp bar (but not updating

to server)

app/assets/javascripts/backbone/models/habit.js.coffee

@@ -23,14 +23,12 @@ class HabitTracker.Models.Habit extends Backbone.Model
   isRemainingTodo: ->
     @get("habit_type")==3 and !@get("done")
     
-  # TODO before_save on user, calculate delta on score & experience there, not in vote
-  # TODO retrieve this formula from server so don't have to have it in two locations (Habit.clear requires it server-side)
   vote: (direction) ->
     # For negative values, use a line: something like y=-.1x+1
     # For positibe values, taper off with inverse log: y=.9^x
     # Would love to use inverse log for the whole thing, but after 13 fails it hits infinity
     sign = if (direction == "up") then 1 else -1
-    score = this.get("score")
+    score = @get("score")
     delta = 0
     if score < 0
       delta = (( -0.1 * score + 1 ) * sign)
@@ -40,30 +38,14 @@ class HabitTracker.Models.Habit extends Backbone.Model
     score += delta
     
     # up/down -voting as checkbox & assigning as done, 2 birds one stone
-    done = this.get("done")
-    if this.get("habit_type")!=1
+    done = @get("done")
+    if !@isHabit()
       done = true if direction=="up"
       done = false if direction=="down"
     
-    this.save({ score: score, done: done })
+    @save({ score: score, done: done })
+    window.userStats.updateStats(this, delta)
     
 class HabitTracker.Collections.HabitsCollection extends Backbone.Collection
   model: HabitTracker.Models.Habit
-  
   url: '/habits'
-  
-  #TODO
-  # standard: () ->
-    # @filter (habit)->
-      # habit.get('habit_type')==1
-#   
-  # daily: () ->
-    # @filter (habit) ->
-      # habit.get('habit_type')==2
-# 
-  # todosDone: () ->
-    # @filter (habit) ->
-      # (habit.get "done") and (habit.get('habit_type')==3)
-#   
-  # todosRemaining: () ->
-    # @without.apply(this, this.done()) and (habit.get('habit_type')==3)

app/assets/javascripts/backbone/models/user.js.coffee

@@ -0,0 +1,25 @@
+# Basically a singleton global variable, not being synced with the server
+# Reason is habit.update() will calculate user stats on server
+class HabitTracker.Models.User extends Backbone.Model
+  
+  updateStats: (habit, delta) ->
+    # set exp
+    @set({exp: @get('exp')+delta})
+
+    # can't go below 0 exp
+    if @get('exp') < 0 then @set({exp: 0})
+    
+    # level up & carry-over exp 
+    if @get('exp') > @tnl()
+      @set({ exp: @get('exp') - @tnl() })
+      @set({ lvl: @get('lvl') + 1 })
+    
+    # also add money. Only take away money if it was a mistake (aka, a checkbox) 
+    if delta>0 or !habit.isHabit() 
+      @set({money: @get('money')+delta})
+      
+    @trigger('updatedStats')
+      
+  tnl: () ->
+    # http://tibia.wikia.com/wiki/Formula
+    50 * Math.pow(@get('lvl'), 2) - 150 * @get('lvl') + 200