Functions To Update Chats and Converation Table

Initial Database Design for Conversations
Update Conversations table when new records/modifications are made to chat table
Agboola

functions/mesaages_upd_function/lib/main.dart

@@ -1,15 +1,20 @@
+// 6793b2543197428f812a 679d942812784f70a3d6
+// {"message":" Hi Daddy ABCDe", "senderId": "679d942812784f70a3d6", "timeStamp": "2025-01-29T16:33:19.480+00:00", "type": "text"}
+// {"message":"Cool Bro, you good?", "senderId": "6793b2543197428f812a", "timeStamp": "2025-01-29T16:36:19.480+00:00", "type": "text"}
+
 import 'dart:async';
+import 'dart:convert';
 import 'dart:io';
 import 'package:dart_appwrite/dart_appwrite.dart';
 
 late Databases _database;
 
-var _usersDbId;
 var _conversationDbId;
 var _documentId;
 var _databaseId;
 
 Future<dynamic> main(final context) async {
+  //
   try {
     final client = Client()
         .setEndpoint(
@@ -18,11 +23,74 @@ Future<dynamic> main(final context) async {
         .setKey(context.req.headers['x-appwrite-key'] ?? '');
 
     _database = Databases(client);
-  } on AppwriteException catch (e) {
-    context.error('error message - ${e.message}');
-  } on Exception catch (e) {
-    context.error('error message - ${e.toString()}');
-  }
+    _conversationDbId = Platform.environment['APPWRITE_COLLECTION_ID'];
 
+    String trigger = context.req.headers['x-appwrite-trigger'];
+    if (trigger == 'event') {
+      List<dynamic> _members = context.req.bodyJson['members'];
+      List<dynamic> _messages = context.req.bodyJson['messages'];
+      _documentId = context.req.bodyJson['\$id'];
+      _databaseId = context.req.bodyJson['\$databaseId'];
+
+      for (String _member in _members) {
+        var _membersReduced =
+            _members.where((_data) => _data != _member).toList();
+        await updateConversation(context, _member, _membersReduced, _messages);
+      }
+    }
+  } on AppwriteException catch (e) {
+    context.error('error message (AppWrite)- ${e.message}');
+  } on Exception catch (e) {
+    context.error('error message (General)- ${e.toString()}');
+  }
   return context.res.empty();
 }
+
+dynamic updateConversation(
+    var context, var member, var _members, var _messages) async {
+  //
+  Map _message = json.decode(_messages[_messages.length - 1]);
+  //
+  if (_message.isNotEmpty) {
+    context.log('hre');
+
+    for (var _member in _members) {
+      //
+      List<dynamic> _chatIdMap = [];
+      List<dynamic> _detailMap = [];
+
+      var _conversationDetail = await _database.getDocument(
+        databaseId: _databaseId,
+        collectionId: _conversationDbId,
+        documentId: member,
+      );
+
+      _detailMap = _conversationDetail.data['details'];
+      _chatIdMap = _conversationDetail.data['chatId'];
+
+      var _index = _chatIdMap.indexOf(_documentId);
+      Map _detail = json.decode(_detailMap[_index]);
+
+      _detail['unseenCount'] += 1;
+      _detail['lastMessage'] = _message['message'];
+      _detail['timeStamp'] = _message['timeStamp'];
+
+      _detailMap[_index] = json.encode(_detail);
+      _conversationDetail.data['details'] = _detailMap;
+
+      Map<String, dynamic> _conversationMap = {
+        "chatId": _chatIdMap,
+        "details": _detailMap
+      };
+
+      context.log(_detailMap);
+
+      await _database.updateDocument(
+          databaseId: _databaseId,
+          collectionId: _conversationDbId,
+          documentId: member,
+          data: _conversationMap);
+    }
+  }
+  return '';
+}