extNEXTWDAY function

dynamic extNEXTWDAY(
  1. dynamic v1,
  2. dynamic v2
)

NEXTWDAY(date, dow): finds the next occurrence of the given weekday from date (dow=1 Mon..7 Sun)

Implementation

dynamic extNEXTWDAY(dynamic v1, dynamic v2) {
  final d = _vToDateTime(v1);
  if (d == null) return null;
  final target = varToInt(v2);
  var diff = target - d.weekday;
  if (diff <= 0) diff += 7;
  return d.add(Duration(days: diff));
}