How do i compare current timestamp to the timestap from firebase flutter-CodePudding

I want to create a function which does not allow the user to remove the appointment once the timestamp for the appointment has past already. But what i tried below does not work, i hope to get some guidance from you guys

My widget.filter is a var which has the timestamp value from firebase

DateTime currentPhoneDate = DateTime.now(); //DateTime
Timestamp myTimeStamp = Timestamp.fromDate(currentPhoneDate); //To TimeStamp
DateTime myDateTime = myTimeStamp.toDate(); // TimeStamp to DateTime

print("current phone data is: $currentPhoneDate");
print("current phone data is: $myDateTime");

if(myTimeStamp < widget.filter){
print('work');
 }else{
 print('fail');
 }

CodePudding user response：

Flutter has a built in function for this purpose, and if I understand your question correctly what you'll want to do is change:

if(myTimeStamp < widget.filter) {}

to:

if(myTimeStamp.isAfter(widget.filter)) {}

CodePudding user response：

  DateTime currentPhoneDate = DateTime.now();
  Timestamp myTimeStamp = Timestamp.fromDate(currentPhoneDate);
  DateTime myDateTime = myTimeStamp.toDate();

  print("myTimeStamp is: $myTimeStamp");
  print("currentPhoneDate is: $currentPhoneDate");
  print("myDateTime is: $myDateTime");

  //  if widget.filter DataType is not Timestamp then first convert it to Timestamp.

  if (myTimeStamp.millisecondsSinceEpoch <
      widget.filter.millisecondsSinceEpoch) {
    print('work');
  } else {
    print('fail');
  }