Перепиливание под чистый DDD

2026-03-22 23:59:33 +03:00
parent 5da1a2f45d
commit 6e532b021d
302 changed files with 3595 additions and 3679 deletions
@@ -0,0 +1,130 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using Knot.Shared.Kernel;
+using Knot.Shared.Kernel.Storage;
+using Knot.Modules.Conversations.Domain;
+using Knot.Modules.Conversations.Application.Abstractions;
+using MediatR;
+using System.Linq;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.Processing;
+
+namespace Knot.Modules.Conversations.Application.Chats.Avatar;
+
+public record UploadGroupAvatarCommand(Guid ChatId, Guid UserId, string FileName, string ContentType, Stream FileStream) : ICommand<Guid>;
+
+internal sealed class UploadGroupAvatarCommandHandler : ICommandHandler<UploadGroupAvatarCommand, Guid>
+{
+    private readonly IChatRepository _chatRepository;
+    private readonly IChatsUnitOfWork _uow;
+    private readonly IFileStorageService _fileStorage;
+
+    public UploadGroupAvatarCommandHandler(IChatRepository chatRepository, IChatsUnitOfWork uow, IFileStorageService fileStorage)
+    {
+        _chatRepository = chatRepository;
+        _uow = uow;
+        _fileStorage = fileStorage;
+    }
+
+    public async Task<Result<Guid>> Handle(UploadGroupAvatarCommand request, CancellationToken cancellationToken)
+    {
+        var chat = await _chatRepository.GetByIdAsync(request.ChatId, cancellationToken);
+        if (chat == null || !chat.Members.Any(m => m.UserId == request.UserId))
+        {
+            return Result.Failure<Guid>(ChatErrors.ChatNotFound);
+        }
+
+        var fileId = await _fileStorage.UploadFileAsync(request.FileStream, request.FileName, request.ContentType);
+        var url = $"/api/files/{fileId}";
+
+        chat.UpdateAvatar(url);
+        _chatRepository.Update(chat);
+        await _uow.SaveChangesAsync(cancellationToken);
+
+        return Result.Success(request.ChatId);
+    }
+}
+
+public record CropGroupAvatarCommand(Guid ChatId, Guid UserId, string FileName, string ContentType, Stream FileStream, int X, int Y, int Width, int Height) : ICommand<Guid>;
+
+internal sealed class CropGroupAvatarCommandHandler : ICommandHandler<CropGroupAvatarCommand, Guid>
+{
+    private readonly IChatRepository _chatRepository;
+    private readonly IChatsUnitOfWork _uow;
+    private readonly IFileStorageService _fileStorage;
+
+    public CropGroupAvatarCommandHandler(IChatRepository chatRepository, IChatsUnitOfWork uow, IFileStorageService fileStorage)
+    {
+        _chatRepository = chatRepository;
+        _uow = uow;
+        _fileStorage = fileStorage;
+    }
+
+    public async Task<Result<Guid>> Handle(CropGroupAvatarCommand request, CancellationToken cancellationToken)
+    {
+        var chat = await _chatRepository.GetByIdAsync(request.ChatId, cancellationToken);
+        if (chat == null || !chat.Members.Any(m => m.UserId == request.UserId))
+        {
+            return Result.Failure<Guid>(ChatErrors.ChatNotFound);
+        }
+
+        string url;
+
+        using (var image = await SixLabors.ImageSharp.Image.LoadAsync(request.FileStream))
+        {
+            int startX = Math.Max(0, Math.Min(request.X, image.Width - 1));
+            int startY = Math.Max(0, Math.Min(request.Y, image.Height - 1));
+            int rectWidth = Math.Max(1, Math.Min(request.Width, image.Width - startX));
+            int rectHeight = Math.Max(1, Math.Min(request.Height, image.Height - startY));
+
+            image.Mutate(ctx => ctx.Crop(new SixLabors.ImageSharp.Rectangle(startX, startY, rectWidth, rectHeight)));
+            image.Mutate(ctx => ctx.Resize(400, 400));
+
+            using var outStream = new MemoryStream();
+            await image.SaveAsJpegAsync(outStream, cancellationToken);
+            outStream.Position = 0;
+
+            var fileName = request.FileName ?? "avatar.jpg";
+            var fileId = await _fileStorage.UploadFileAsync(outStream, fileName, "image/jpeg");
+            url = $"/api/files/{fileId}";
+        }
+
+        chat.UpdateAvatar(url);
+        _chatRepository.Update(chat);
+        await _uow.SaveChangesAsync(cancellationToken);
+
+        return Result.Success(request.ChatId);
+    }
+}
+
+public record RemoveGroupAvatarCommand(Guid ChatId, Guid UserId) : ICommand<Guid>;
+
+internal sealed class RemoveGroupAvatarCommandHandler : ICommandHandler<RemoveGroupAvatarCommand, Guid>
+{
+    private readonly IChatRepository _chatRepository;
+    private readonly IChatsUnitOfWork _uow;
+
+    public RemoveGroupAvatarCommandHandler(IChatRepository chatRepository, IChatsUnitOfWork uow)
+    {
+        _chatRepository = chatRepository;
+        _uow = uow;
+    }
+
+    public async Task<Result<Guid>> Handle(RemoveGroupAvatarCommand request, CancellationToken cancellationToken)
+    {
+        var chat = await _chatRepository.GetByIdAsync(request.ChatId, cancellationToken);
+        if (chat == null || !chat.Members.Any(m => m.UserId == request.UserId))
+        {
+            return Result.Failure<Guid>(ChatErrors.ChatNotFound);
+        }
+
+        chat.UpdateAvatar(null);
+        _chatRepository.Update(chat);
+        await _uow.SaveChangesAsync(cancellationToken);
+
+        return Result.Success(request.ChatId);
+    }
+}
+