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Adding document changes variant for collection stream #17

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Adding document changes variant for collection stream #17

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31 changes: 31 additions & 0 deletions packages/firestore_service/lib/firestore_service.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,37 @@ class FirestoreService {
});
}

Stream<List<T>> collectionStreamChanges<T>({
required String path,
required T Function(Map<String, dynamic>? data,
String documentID,
String changeType,) builder,
Query<Map<String, dynamic>>? Function(Query<Map<String, dynamic>> query)?
queryBuilder,
int Function(T lhs, T rhs)? sort,
}) {
Query<Map<String, dynamic>> query =
FirebaseFirestore.instance.collection(path);
if (queryBuilder != null) {
query = queryBuilder(query)!;
}
final Stream<QuerySnapshot<Map<String, dynamic>>> snapshots =
query.snapshots();
return snapshots.map((snapshot) {
final result = snapshot.docChanges
.map((snapshot) => builder(
snapshot.doc.data(),
snapshot.doc.id,
snapshot.type.name,),)
.where((value) => value != null)
.toList();
if (sort != null) {
result.sort(sort);
}
return result;
});
}

Stream<T> documentStream<T>({
required String path,
required T Function(Map<String, dynamic>? data, String documentID) builder,
Expand Down