I want to calculate a reminderDate
by subtracting 3 days from it. However, if the resulting date
- falls on a Saturday or Sunday, it should give the date of the Friday
- falls on a Friday, it should give the date of Thursday
For example
Exchange Date ReminderDate
18.06.2020 -3 days = 15.06.2020 --> OK, because Monday
17.06.2020 -3 days = 14.06.2020 --> Sunday, must be changed to 12.06.2020
16.06.2020 -3 days = 13.06.2020 --> Saturday, must be changed to 12.06.2020
15.06.2020 -3 days = 11.06.2020 --> Friday, must be changed to 11.06.2020
I tried something like this, but neither .getDay()
nor .day()
seem to work. And dt
seems to give the date of today, and not the date of exchange
.
var exchange = NWF$("#" + varAustauschtermin).val(); // date like 18.06.2020
console.log("Exchange: " + exchange);
var reminderDate = moment(exchange, "DD.MM.YYYY").format("DD.MM.YYYY");
var dt = new Date(reminderDate);
// var reminderDate = moment(exchange, "DD.MM.YYYY").subtract(3, 'days').format("DD.MM.YYYY");
// console.log("reminderDate.day(): " + reminderDate.day());
// console.log("reminderDate.getDay(): " + reminderDate.getDay());
if(dt.getDay() == 6) { // Saturday
console.log("Saturday");
reminderDate = moment(exchange, "DD.MM.YYYY").subtract(1, 'days').format("DD.MM.YYYY");
} else if (dt.getDay() == 0) { // Sunday
console.log("Sunday");
reminderDate = moment(exchange, "DD.MM.YYYY").subtract(2, 'days').format("DD.MM.YYYY");
} else if (dt.getDay() == 5) { // Friday
console.log("Friday");
reminderDate = moment(exchange, "DD.MM.YYYY").subtract(1, 'days').format("DD.MM.YYYY");
} else {
console.log("Weekday");
reminderDate = moment(exchange, "DD.MM.YYYY").subtract(3, 'days').format("DD.MM.YYYY");
}
console.log("Reminder Date: " + reminderDate);
Any help is appreciated!