prosappweb/lib/repositories/firebase_chat_repository.dart

import 'dart:developer';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:prosapp_web_app/models/chat_entity.dart';
import 'package:prosapp_web_app/models/message_entity.dart';

class FirebaseChatRepository {
  final chatCollection = FirebaseFirestore.instance.collection('chats');

  Stream<ChatEntity?> getChatById(String chatId) {
    return chatCollection.doc(chatId).snapshots().map((snapshot) {
      try {
        if (snapshot.exists) {
          return ChatEntity.fromDocument(snapshot.data()!);
        } else {
          return null;
        }
      } catch (e) {
        log(e.toString());
        return null;
      }
    });
  }

  Future<ChatEntity> createNewChat(
      String chatId, String userId, String professionalId) async {
    ChatEntity chat = ChatEntity(
      id: chatId,
      userId: userId,
      professionalId: professionalId,
      messages: const [],
    );

    await chatCollection.doc(chatId).set(chat.toDocument());

    return chat;
  }

  sendMessage(String chatId, MessageEntity message) {
    chatCollection.doc(chatId).update({
      'messages': FieldValue.arrayUnion([message.toDocument()])
    });
  }
}