Уведомление об удалении чата

backend/src/Modules/Conversations/Application/Chats/LeaveOrDelete/LeaveOrDeleteChat.cs

@@ -1,13 +1,14 @@
 using System;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Knot.Shared.Kernel;
-using Knot.Contracts.Conversations.Domain;
 using Knot.Contracts.Conversations.Application.Abstractions;
-using MediatR;
+using Knot.Contracts.Conversations.Domain;
-using System.Linq;
+using Knot.Modules.Conversations.Infrastructure.SignalR;
-using Knot.Contracts.Messaging.Application.Abstractions;
+using Knot.Shared.Kernel;
 using Knot.Shared.Kernel.Storage;
+using MediatR;
+using Microsoft.AspNetCore.SignalR;
 
 namespace Knot.Modules.Conversations.Application.Chats.LeaveOrDelete;
 
@@ -19,17 +20,21 @@ internal sealed class LeaveOrDeleteChatCommandHandler : ICommandHandler<LeaveOrD
     private readonly IMessageRepository _messageRepository;
     private readonly IFileStorageService _fileStorage;
     private readonly IChatsUnitOfWork _uow;
+    private readonly IHubContext<ChatHub> _hubContext;
 
     public LeaveOrDeleteChatCommandHandler(
-        IChatRepository chatRepository, 
+        IChatRepository chatRepository,
+
         IMessageRepository messageRepository,
         IFileStorageService fileStorage,
-        IChatsUnitOfWork uow)
+        IChatsUnitOfWork uow,
+        IHubContext<ChatHub> hubContext)
     {
         _chatRepository = chatRepository;
         _messageRepository = messageRepository;
         _fileStorage = fileStorage;
         _uow = uow;
+        _hubContext = hubContext;
     }
 
     public async Task<Result<SuccessResponse>> Handle(LeaveOrDeleteChatCommand request, CancellationToken cancellationToken)
@@ -58,6 +63,14 @@ internal sealed class LeaveOrDeleteChatCommandHandler : ICommandHandler<LeaveOrD
             // DELETE ALL MESSAGES AND FILES FIRST
             await DeleteChatMediaAndMessagesAsync(chat.Id, cancellationToken);
             _chatRepository.Remove(chat);
+
+            // Notify all remaining members that the chat was deleted
+
+            foreach (var member in chat.Members)
+            {
+                await _hubContext.Clients.User(member.UserId.ToString())
+                    .SendAsync("chat_deleted", chat.Id.ToString(), cancellationToken);
+            }
         }
 
         await _uow.SaveChangesAsync(cancellationToken);
@@ -67,7 +80,8 @@ internal sealed class LeaveOrDeleteChatCommandHandler : ICommandHandler<LeaveOrD
 
     private async Task DeleteChatMediaAndMessagesAsync(Guid chatId, CancellationToken ct)
     {
-        try 
+        try
+
         {
             // Get all messages directly from Mongo (not paged)
             var messages = await _messageRepository.GetChatMessagesAsync(chatId, int.MaxValue, 0, ct);