Редактирование и плеер

backend/src/Modules/Conversations/Application/Messages/Edit/EditMessageCommand.cs

@@ -0,0 +1,69 @@
+using Knot.Contracts.Messaging.Application.Abstractions;
+using Knot.Contracts.Messaging.Domain;
+using Knot.Contracts.Conversations.Application.Abstractions;
+using Knot.Contracts.Conversations.Domain;
+using Knot.Modules.Conversations.Infrastructure.SignalR;
+using Knot.Shared.Kernel;
+using MediatR;
+using Microsoft.AspNetCore.SignalR;
+
+namespace Knot.Modules.Conversations.Application.Messages.Edit;
+
+public sealed record EditMessageCommand(
+    Guid MessageId,
+    Guid ChatId,
+    Guid UserId,
+    string Content) : ICommand;
+
+public sealed class EditMessageCommandHandler : ICommandHandler<EditMessageCommand>
+{
+    private readonly IMessageRepository _messageRepository;
+    private readonly IChatsUnitOfWork _unitOfWork;
+    private readonly IHubContext<ChatHub> _hubContext;
+
+    public EditMessageCommandHandler(
+        IMessageRepository messageRepository,
+        IChatsUnitOfWork unitOfWork,
+        IHubContext<ChatHub> hubContext)
+    {
+        _messageRepository = messageRepository;
+        _unitOfWork = unitOfWork;
+        _hubContext = hubContext;
+    }
+
+    public async Task<Result> Handle(EditMessageCommand request, CancellationToken cancellationToken)
+    {
+        var message = await _messageRepository.GetByIdAsync(request.MessageId, cancellationToken);
+        
+        if (message is null)
+        {
+            return Result.Failure(new Error("Message.NotFound", "Message not found."));
+        }
+
+        if (message.SenderId != request.UserId)
+        {
+            return Result.Failure(new Error("Message.Forbidden", "You can only edit your own messages."));
+        }
+
+        if (message.ChatId != request.ChatId)
+        {
+             return Result.Failure(new Error("Message.InvalidChat", "Message does not belong to this chat."));
+        }
+
+        message.Edit(request.Content);
+
+        await _messageRepository.UpdateAsync(message, cancellationToken);
+        await _unitOfWork.SaveChangesAsync(cancellationToken);
+
+        // Notify clients
+        await _hubContext.Clients.Group(request.ChatId.ToString()).SendAsync("message_edited", new
+        {
+            messageId = message.Id,
+            chatId = message.ChatId,
+            content = message.Content,
+            isEdited = true
+        });
+
+        return Result.Success();
+    }
+}