Match function returning bad result

[Barakar]

Hey!

I'm trying to create a recurrence that will handle event that for example occurs on Sunday and Monday every three weeks with this definition:

let cal = moment(new Date("11/12/2017")).recur().every(["Sunday","Monday"]).daysOfWeek().every(3).weeks();

cal = {
 "start": "2017-11-12T00:00:00.000Z",
 "rules": [
  {
   "measure": "daysOfWeek",
   "units": {
    "0": true,
    "1": true
   }
  },
  {
   "measure": "weeks",
   "units": {
    "3": true
   }
  }
 ],
 "exceptions": [],
 "units": null,
 "measure": null,
 "from": null
}

now I'm trying to run the following "matches" function:

console.log(cal.matches(new Date("12/03/2017 13:15:15"))); // true - exactly 3 weeks
console.log(cal.matches(new Date("12/04/2017 13:15:15"))); // false - 3 weeks and a day

The problem I noticed is that the diff dates logic considering only the start date and not the actual week -
also noticed that you solve this problem with days by floor the result

if (type == 'days') {
                // if we are dealing with days, we deal with whole days only.
                diff = parseInt(diff);
            }

In addition, flooring the diff of the weeks will cause other problems as following (assuming that we floor the diff) :

let cal = moment(new Date("11/12/2017")).recur().every(3).weeks(); 
console.log(cal.matches(new Date("12/03/2017 13:15:15"))); // true
console.log(cal.matches(new Date("12/04/2017 13:15:15"))); // also true :-|

Can you suggest any solution?

Thanks,
Barak