68 lines
2.1 KiB
Dart
68 lines
2.1 KiB
Dart
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import 'package:cloud_firestore/cloud_firestore.dart';
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import 'package:cofounderella/models/message.dart';
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import 'package:firebase_auth/firebase_auth.dart';
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class ChatService {
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// get instance of firestore and auth
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final FirebaseFirestore _firestore = FirebaseFirestore.instance;
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final FirebaseAuth _auth = FirebaseAuth.instance;
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// get user stream
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Stream<List<Map<String, dynamic>>> getUsersStream() {
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return _firestore.collection("Users").snapshots().map((snapshot) {
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return snapshot.docs.map((doc) {
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// iterate each user
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final user = doc.data();
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//return user
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return user;
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}).toList();
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});
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}
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// send message
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Future<void> sendMessage(String receiverID, message) async {
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// get current user info
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final String currentUserID = _auth.currentUser!.uid;
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final String currentUserEmail = _auth.currentUser!.email!;
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final Timestamp timestamp = Timestamp.now();
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// create new message
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Message newMessage = Message(
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senderID: currentUserID,
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senderEmail: currentUserEmail,
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receiverID: receiverID,
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message: message,
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timestamp: timestamp,
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);
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// construct chat room ID for the two users (sorted to ensure uniqueness)
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List<String> ids = [currentUserID, receiverID];
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ids.sort(); // sort to ensure the chatroomID is the same for any 2 users
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String chatRoomID = ids.join('_');
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// add new message to database
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await _firestore
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.collection("chat_rooms")
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.doc(chatRoomID)
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.collection("messages")
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.add(newMessage.toMap());
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}
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// get messages
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Stream<QuerySnapshot> getMessages(String userID, otherUserID) {
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// TODO create chat room ID -- same code snippet as above
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// construct chat room ID for the two users (sorted to ensure uniqueness)
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List<String> ids = [userID, otherUserID];
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ids.sort(); // sort to ensure the chatroomID is the same for any 2 users
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String chatRoomID = ids.join('_');
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return _firestore
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.collection("chat_rooms")
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.doc(chatRoomID)
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.collection("messages")
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.orderBy("timestamp", descending: false)
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.snapshots();
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}
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}
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