new city

packages/city_repository/lib/src/repositories/city_repo.dart

@@ -0,0 +1,6 @@
+import 'package:city_repository/city_repository.dart';
+import 'package:city_repository/src/models/city_ui.dart';
+
+abstract class CityRepository {
+  Future<List<CityUi>> getCities();
+}

packages/city_repository/lib/src/repositories/firebase_city_repository.dart

@@ -0,0 +1,44 @@
+import 'dart:developer';
+
+import 'package:city_repository/city_repository.dart';
+import 'package:cloud_firestore/cloud_firestore.dart';
+
+class FirebaseCityRepository implements CityRepository {
+  final citiesCollection =
+      FirebaseFirestore.instance.collection('countries v2');
+
+  List<CityUi>? _cities;
+
+  @override
+  Future<List<CityUi>> getCities() async {
+    if (_cities != null) {
+      return _cities!;
+    }
+
+    final List<CityUi> cities = [];
+
+    try {
+      final doc = await citiesCollection.doc("Colombia").get();
+
+      final data = doc.data();
+
+      final country = CountryEntity.fromDocument(data as Map<String, dynamic>);
+
+      for (var region in country.regions) {
+        for (var city in region.cities) {
+          cities.add(CityUi(
+              cityName: city.name,
+              coordsOfCity: city.coords,
+              stateOfCity: region.name,
+              countryOfCity: country.name));
+        }
+      }
+    } catch (e) {
+      log(e.toString());
+      rethrow;
+    }
+
+    _cities = cities;
+    return cities;
+  }
+}