ADD : Methods to get messages from FireStrore

Sources/dafl_project_flutter/lib/controller/controller.dart

@@ -11,14 +11,14 @@ import '../services/database/database_service.dart';
 import '../services/position/location.dart';
 import 'live_datas.dart';
 import 'package:dafl_project_flutter/model/message.dart';
-import 'package:dafl_project_flutter/services/messaging/message_database.dart';
+import 'package:dafl_project_flutter/services/messaging/message_database_service.dart';
 
 class Controller {
   final ApiSpotify _api = ApiSpotify();
   late User _currentUser;
   final DataBaseService _dataBaseService = DataBaseService();
   final LiveData _data = LiveData();
-  final MessageDatabase _messageAccess = MessageDatabase();
+  final MessageDatabaseService _messageAccess = MessageDatabaseService();
 
   late BuildContext navigatorKey;
 

Sources/dafl_project_flutter/lib/services/messaging/message_database_service.dart

@@ -2,7 +2,7 @@ import 'package:dafl_project_flutter/model/message.dart';
 import 'package:cloud_firestore/cloud_firestore.dart';
 
 
-class MessageDatabase {
+class MessageDatabaseService{
   String _getChatId(String idSender, String idReceiver) {
     if (idSender.hashCode <= idReceiver.hashCode)
       return '$idSender-${idReceiver}';
@@ -26,4 +26,27 @@ class MessageDatabase {
       transaction.set(documentReference, message.toHashMap());
     });
   }
+
+  Message _getMessage(DocumentSnapshot<Map<String, dynamic>> snapshot) {
+    var data = snapshot.data();
+    if (data == null)
+      throw Exception("no data in database");
+
+    return Message.fromMap(data);
+  }
+
+
+  List<Message> _getAllMessages(QuerySnapshot<Map<String, dynamic>> snapshot) {
+    return snapshot.docs.map((doc) {
+      return _getMessage(doc);
+    }).toList();
+  }
+
+  Stream<List<Message>> getMessage(String chatId) {
+    return FirebaseFirestore.instance
+        .collection('messages')
+        .doc(chatId)
+        .collection(chatId)
+        .snapshots().map(_getAllMessages);
+  }
 }