[#1444] add filters back to use schema. Allow editing of top-level tags

object in PUT /user, WARNING! We want to get away from that ASAP and
instead have a nested resource for managing tags. Set default task tags
if not present, will revisit after tasks are a subdoc too

src/models/user.js

@@ -57,7 +57,7 @@ var UserSchema = new Schema({
   dailyIds: Array,
   todoIds: Array,
   rewardIds: Array,
-  /* Removed `filters`, no longer persisting to the database*/
+  filters: {type: Schema.Types.Mixed, 'default': {}},
 
   flags: {
     ads: String,
@@ -218,6 +218,7 @@ function transformTaskLists(doc) {
   _.each(['habit', 'daily', 'todo', 'reward'], function(type) {
     // we use _.transform instead of a simple _.where in order to maintain sort-order
     doc[type + "s"] = _.reduce(doc[type + "Ids"], function(m, tid) {
+      if (!doc.tasks[tid].tags) doc.tasks[tid].tags = {}; // FIXME remove this when we switch tasks to subdocs and can define tags default in schema
       m.push(doc.tasks[tid]);
       return m;
     }, []);
@@ -238,7 +239,7 @@ UserSchema.methods.toJSON = function() {
     delete doc["#{type}Ids"]
   });
   delete doc.tasks
-  doc.filters = {};
+  //doc.filters = {};
 
   return doc;
 };