Sellers Filtering

lib/meetings.dart

@@ -0,0 +1,47 @@
+import 'dart:ffi';
+
+import 'package:cloud_firestore/cloud_firestore.dart';
+
+class TimeRange {
+  late DateTime startTime;
+  late DateTime endTime;
+
+  TimeRange(this.startTime, this.endTime);
+}
+
+class Seller {
+  String name = "";
+  String uid = "";
+  String location = "";
+  TimeRange availableTime;
+  Int64 price;
+
+  Seller(this.name, this.uid, this.location, this.availableTime, this.price);
+}
+
+class Filter {
+  String? location;
+  Int64? price;
+  TimeRange? meetingTime;
+
+  Filter(this.location, this.price, this.meetingTime);
+}
+
+Future<List<Seller>> getSellers(Filter filter) async {
+  CollectionReference users = FirebaseFirestore.instance.collection('sellers');
+  List<Seller> sellers = List.empty();
+
+  final Query query = users
+      .where('location', isEqualTo: filter.location)
+      .where('price', isEqualTo: filter.price)
+      .where('start-time',
+          isGreaterThanOrEqualTo: filter.meetingTime?.startTime)
+      .where('end-time', isLessThanOrEqualTo: filter.meetingTime?.endTime);
+
+  final QuerySnapshot snapshot = await query.get();
+  for (var doc in snapshot.docs) {
+    sellers.add(Seller(doc["name"], doc["uid"], doc["location"],
+        TimeRange(doc["start-time"], doc["end-time"]), doc["price"]));
+  }
+  return sellers;
+}