ref: project structure

application/Documents/Commands/UpdateDocument.cs

@@ -0,0 +1,40 @@
+using AutoMapper;
+using MediatR;
+using mws.backend.dotnet.application.Common;
+using mws.backend.dotnet.application.Permissions;
+using mws.backend.dotnet.domain.Documents;
+
+namespace mws.backend.dotnet.application.Documents;
+
+public record UpdateDocumentCommand(Guid UserId, Guid DocumentId, UpdateDocumentRequest Request) : IRequest<DocumentDto>;
+
+public class UpdateDocumentHandler(IUnitOfWork uow, IMapper mapper) : IRequestHandler<UpdateDocumentCommand, DocumentDto>
+{
+    public async Task<DocumentDto> Handle(UpdateDocumentCommand command, CancellationToken ct)
+    {
+        var doc = await DocumentAccess.GetDocumentForUserAsync(uow, command.UserId, command.DocumentId, ct);
+        await DocumentAccess.EnsureDocumentPermissionAsync(uow, command.UserId, doc.ProjectId, PermissionAction.Edit, ct);
+
+        var request = command.Request;
+        if (string.IsNullOrWhiteSpace(request.Title))
+        {
+            throw new BadRequestException("Title is required");
+        }
+
+        doc.Title = request.Title.Trim();
+        if (doc.Type == DocumentType.Document)
+        {
+            doc.Content = request.Content;
+            doc.UpdatedAt = DateTime.UtcNow;
+            doc.UpdatedBy = command.UserId;
+        }
+        else
+        {
+            doc.UpdatedAt = DateTime.UtcNow;
+            doc.UpdatedBy = command.UserId;
+        }
+
+        await uow.SaveChangesAsync(ct);
+        return mapper.Map<DocumentDto>(doc);
+    }
+}