Modified common/script/index.coffee to display dayStart, but send back a

variable of dayStart for processing, instead of having the object directly
updated at the time of edit.

Modified website/views/options/settings.jade to allow a timestamp to be
cast to an iso timestamp because lastCron is saved as an iso timestamp,
and as a straight moment()-based timestamp in order to compare timestamps.

Modified website/public/js/controllers/settingsCtrl.js to do the
following:
   Accept the new proposed dayStart
   Calculate the timestamp of the old dayStart and the new dayStart

     These two steps were necessary because dayStart is an integer between
     and including 0 and 23. I tested and confirmed the current production
     dayStart does not allow 24 to be entered but does allow 0. I was
     careful to NOT change how that worked.

   Cast the old dayStart, the new dayStart and lastCron to the moment()
   version of time so they could be compared.

   Cast the new dayStart to the iso timestamp for storage in lastCron

   The important change is the following:

   if oldDayStart < lastCron AND lastCron < newDayStart then lastCron
   should be set to newDayStart. I modified this to include if oldDayStart
   = lastCron, although I think that's pretty unlikely to be possible.
   When I tested this, my lastCron was a mere 17 seconds after my
   oldDayStart, so it seemed to me that the equal case should be included
   with the less than case.

common/script/index.coffee

@@ -349,6 +349,18 @@ Friendly timestamp
 ###
 api.friendlyTimestamp = (timestamp) -> moment(timestamp).format('MM/DD h:mm:ss a')
 
+###
+ISO timestamp
+###
+api.isoTimestamp = (timestamp) -> moment(timestamp).toISOString()
+
+###
+plain timestamp
+###
+api.momentTimestamp = (timestamp) -> moment(timestamp)
+
+
+
 ###
 Does user have new chat messages?
 ###

website/public/js/controllers/settingsCtrl.js

@@ -66,12 +66,23 @@ habitrpg.controller('SettingsCtrl',
       User.set({'flags.newStuff':true});
     }
 
-    $scope.saveDayStart = function(){
+    $scope.passDayStart = User.user.preferences.dayStart;
-      var dayStart = +User.user.preferences.dayStart;
+
-      if (_.isNaN(dayStart) || dayStart < 0 || dayStart > 24) {
+    $scope.saveDayStart = function(newDayStart){
+      var oldDayStart = User.user.preferences.dayStart;
+      var dayStart = newDayStart;
+      var lastCron = User.user.lastCron;
+      var getOldStart = Shared.startOfDay({ dayStart: oldDayStart});
+      var getNewStart = Shared.startOfDay({ dayStart: dayStart});
+      var isoNewStart = Shared.isoTimestamp(getNewStart);
+
+      if (dayStart == undefined || _.isNaN(dayStart) || dayStart < 0 || dayStart > 24) {
         dayStart = 0;
         return alert(window.env.t('enterNumber'));
       }
+      if (Shared.momentTimestamp(getOldStart) <= Shared.momentTimestamp(lastCron) && Shared.momentTimestamp(lastCron) <  Shared.momentTimestamp(getNewStart)) {
+        User.set({ 'lastCron' : isoNewStart});
+      }
       User.set({'preferences.dayStart': dayStart});
     }
 

website/views/options/settings.jade

@@ -83,7 +83,7 @@ script(type='text/ng-template', id='partials/options.settings.settings.html')
               h5(ng-if='showCustomDayStartInfo')!=env.t('customDayStartInfo4')
               .form-group
                 .input-group
-                  input.form-control(type='number', min='0', max='23', ng-model='user.preferences.dayStart', ng-blur='saveDayStart()')
+                  input.form-control(type='number', min='0', max='23', ng-model='passDayStart', ng-blur='saveDayStart(passDayStart)')
                   span.input-group-addon= ':00 (' + env.t('24HrClock') + ')'
 
       .personal-options.col-md-6