How do I get a query from another file to return a bool? - flutter

Question

I am integrating the following system into my to-do app:
Every time the user opens the app, it should check whether the date stored in Cloud Firestore has been exceeded.
If this is the case, all To-Dos of the user should be reset to false.
This is the date in Cloud Firestore I’m looking for:
This function should check if the date has been exceeded:
Future<bool> checkTime() async{
DateTime now = DateTime.now();
var query = users.where('Startdatum', isLessThanOrEqualTo: now);
query = query.where('userID', isEqualTo: userID);
final querySnapshot = await query.get();
return querySnapshot.size > 0;
}
And this function should reset all To-Dos to false:
Future allFalse() async{
return await users.doc(userID).get().then((DocumentSnapshot doc) {
var updateMap = new Map();
var toDos = doc['Level'];
for (var item in toDos.keys) {
updateMap[item] = false;
}
doc.reference.update({'Level' : updateMap});
});
}
I created both functions in a separate file (database), as you can see here:
class DatabaseService {
String userID;
DatabaseService(this.userID);
final CollectionReference users =
FirebaseFirestore.instance.collection('users');
Future allFalse() async {
return await users.doc(userID).get().then((DocumentSnapshot doc) {
var updateMap = new Map();
var toDos = doc['Level'];
for (var item in toDos.keys) {
updateMap[item] = false;
}
doc.reference.update({'Level': updateMap});
});
}
Future<bool> checkTime() async {
DateTime now = DateTime.now();
var query = users.where('Startdatum', isLessThanOrEqualTo: now);
query = query.where('userID', isEqualTo: userID);
final querySnapshot = await query.get();
return querySnapshot.size > 0;
}
}
I create an if condition in in inite State that includes checkTime. If checkTime returns true, the Future returns allFalse, which sets all To-Dos to false.
class _UebersichtState extends State<Uebersicht> {
User? user;
late DatabaseService database;
Future<void> connect() async{
final FirebaseAuth auth = FirebaseAuth.instance;
UserCredential result = await auth.signInAnonymously();
user = result.user;
database = DatabaseService(user!.uid);
}
#override
void initState() {
// TODO: implement initState
super.initState();
connect();
Future.delayed(Duration(seconds: 3), () async{
if(await database.checkTime()) {
return await database.allFalse();}
else print('Still time left');
});
}
I used a delay because the connect () function has to be executed first, it initializes database.
When I start the app, no error appears, but the To-Dos are not reset either.
Today we have the 21. 12. 2021 and in Cloud Firestore is 14. 12. 21 deposited.
The function allFalse works, it resets the To-Dos all.
It must be the function checkTime, which does not return a bool in the if condition. I just replaced it with if (0 == 0) and that triggers allFalse.
Can someone help me?

Answer 1

This is just a guess, but I believe this is the problem:
query = query.where('userID', isEqualTo: userID);
The above line would only work if your document had a field userID and said field was equal to your UID, but from what I could gather, you identify the UID by the name of the documents, if that is the case, this should work?
Future<bool> checkTime() async {
CollectionReference users = FirebaseFirestore.instance.collection('users');
final now = DateTime.now();
final doc = await users.doc(userID).get();
final stufenzeit = (doc.data() as Map<String, dynamic>)['Stufenzeit'] as Map<String, dynamic>;
final storedDate = (stufenSetit['Startdatum'] as TimeStamp).toDate();
return now.compareTo(storedDate) > 0;
}
There's probably also a way to do it with queries, but I am not so well versed on those to be completely honest.