update apiv2 to use async.series instead of the previous count

method. much better flow control

src/server/apiv2.coffee

@@ -1,6 +1,7 @@
 express = require 'express'
 router = new express.Router()
 util = require 'util'
+async = require 'async'
 
 _ = require 'lodash'
 algos = require 'habitrpg-shared/script/algos'
@@ -26,45 +27,20 @@ POST new actions
 router.post '/', api.auth, (req, res, next) ->
   model = req.getModel()
   {user} = req
-  actions = req.body
-
-  doneCount = 1 + # cron
-    _.size(actions) # standard operations
-  done = (err) ->
-    return next(err) if err
-    if --doneCount is 0
-      uObj = misc.hydrate user.get()
-      #transform user structure FROM user.tasks{} + user.habitIds[] TO user.habits[] + user.todos[] etc.
-      _.each ['habit','daily','todo','reward'], (type) ->
-        uObj["#{type}s"] = _.transform uObj["#{type}Ids"], (result, tid) -> result.push(uObj.tasks[tid])
-        delete uObj["#{type}Ids"]
-      delete uObj.tasks
-      res.json 200, uObj
-      console.log "Reply sent"
-
-  notEmpty = _.find actions, ((action) -> !_.isEmpty(action))
-  unless notEmpty
-    # yan's strange User.log({}) thing
-    doneCount = 1
-    return done()
 
+  performAction = (action, cb) ->
+    task = action.task ? {}
+    switch action.op
+      when "cron"
         misc.batchTxn model, (uObj, paths) ->
           # habitrpg-shared/algos requires uObj.habits, uObj.dailys etc instead of uObj.tasks
           _.each ['habit','daily','todo','reward'], (type) -> uObj["#{type}s"] = _.where(uObj.tasks, {type}); true
           algos.cron uObj, {paths}
-  , {user, done, cron:true}
+        , {user, cb, cron:true}
 
-  if _.isArray actions
-    actions.forEach (action)->
-
-      task = action.task ? {}
-
-      return done() if _.isEmpty(action)
-
-      switch action.op
       when "score"
-          return done() unless user.get "tasks.#{task.id}"
-          sendScore = -> api.score(model, user, task.id, action.dir, done)
+        return cb() unless user.get "tasks.#{task.id}"
+        sendScore = -> api.score(model, user, task.id, action.dir, cb)
         if task.type in ["daily","todo"]
           # switch completed state. Since checkbox is not binded to model unlike when you click through Derby website.
           completed = if action.dir is "up" then true else false
@@ -75,29 +51,52 @@ router.post '/', api.auth, (req, res, next) ->
         path = action.task.type + "Ids"
         a = user.get(path)
         a.splice(action.to, 0, a.splice(action.from, 1)[0])
-          user.set path, a, done
+        user.set path, a, cb
 
       when "addTask"
-          api.addTask user, task, done
+        api.addTask user, task, cb
 
       when "delTask"
-          api.deleteTask user, task, done
+        api.deleteTask user, task, cb
 
       # this API is only working with string or number variables. It should return error if object given or object is at the path.
       when "set"
         oldValue = user.get(action.path)
         if _.isObject(action.value) or _.isObject(oldValue)
           console.error "action.value was an object, which isn't currently supported. Tyler - double check this"
+          cb()
         else
-            user.set action.path, action.value, done
+          user.set action.path, action.value, cb
 
       when "revive"
         [uObj, paths] = [user.get(), {}]
         algos.revive uObj, {paths}
-          doneCount += (_.size(paths) - 1) # once for each path, but +1 is already accounted for at top of this function (whole 'revive' counted as 1)
-          _.each paths, (v,k) ->
-            user.set k, helpers.dotGet(k,uObj), done
+        setOps = _.map paths, (v,k) ->
+          (reviveCb) -> user.set k, helpers.dotGet(k,uObj), reviveCb
+        console.log setOps
+        async.parallel setOps, cb
 
-        else done()
+      else
+        cb()
+
+  # Setup the array of functions we're going to call in parallel with async
+  req.body = [] if _.isEmpty req.body
+  actions = _.transform (req.body or []), (result, action) ->
+    unless _.isEmpty(action)
+      result.push (cb) -> performAction(action, cb)
+  # always run cron check
+  req.body.unshift({op: 'cron'}) unless _.isEmpty actions
+
+  # call all the operations, then return the user object to the requester
+  async.series actions, (err) ->
+    return next(err) if err
+    uObj = misc.hydrate user.get()
+    #transform user structure FROM user.tasks{} + user.habitIds[] TO user.habits[] + user.todos[] etc.
+    _.each ['habit','daily','todo','reward'], (type) ->
+      uObj["#{type}s"] = _.transform uObj["#{type}Ids"], (result, tid) -> result.push(uObj.tasks[tid])
+      delete uObj["#{type}Ids"]
+    delete uObj.tasks
+    res.json 200, uObj
+    console.log "Reply sent"
 
 module.exports = router