[https://app.flutterflow.io/project/chat-app-v1-0cs2aq](https://app.flutterflow.io/project/chat-app-v1-0cs2aq)

chatRooms
|-- {chatRoomId}
    |-- chatRoomId: String
    |-- type: String  // "dm" or "group"
    |-- createdAt: Timestamp
    |-- members: List<String>
    |-- lastMessage
        |-- senderId: String
        |-- message: String
        |-- timestamp: Timestamp
    ||-- messages
        |-- {messageId}
            |-- messageId: String
            |-- senderId: String
            |-- message: String
            |-- timestamp: Timestamp
            |-- type: String  // "text", "image", "file"
            |-- mediaUrl: String  // Optional, if type is not 'text'

Test

{
"messageId": "string",
"senderId": "string",
"message": "string",
"timestamp": "timestamp",
"type": "string",
"mediaUrl": "string"
}

  // clear the unwanted space and empty rows in the passed text ans return it
  return text.replaceAll(RegExp(r'\s+'), ' ').trim();

import 'package:cloud_firestore/cloud_firestore.dart';

Future<bool> updateMessageStatus(
  DocumentReference parentRef,
  DocumentReference userRef,
) async {
  try {
    // Navigate to the messages_group subcollection
    CollectionReference messagesGroup = parentRef.collection('messages_group');

    // Fetch all documents from messages_group
    QuerySnapshot allDocs = await messagesGroup.get();

    // Use a batch to perform multiple updates
    final WriteBatch batch = FirebaseFirestore.instance.batch();

    for (QueryDocumentSnapshot doc in allDocs.docs) {
      // Extract chat_messages which is a list of maps
      List<Map<String, dynamic>> chatMessages =
          List<Map<String, dynamic>>.from(doc['chat_messages'] ?? []);

      bool needsUpdate = false;

      // Loop through each message and check if the user does NOT match and message_status is false
      for (var message in chatMessages) {
        if (message['user'] != userRef && message['message_status'] == false) {
          message['message_status'] = true; // Update the message_status to true
          needsUpdate = true;
        }
      }

      // If any message_status was updated, then update the document
      if (needsUpdate) {
        batch.update(doc.reference, {'chat_messages': chatMessages});
      }
    }

    // Commit the batch
    await batch.commit();

    // If everything went well, return true
    return true;
  } catch (e) {
    // If there was an exception, return false
    return false;
  }
}

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