feat: implement delete file

Backend/src/Modules/Files/Files.Api/Endpoints/Files/DeleteFileAsset.cs

@@ -0,0 +1,25 @@
+using Files.Application.Entities.Files.Commands.DeleteFileAsset;
+
+namespace Files.Api.Endpoints.Files;
+
+public class DeleteFileAsset : ICarterModule
+{
+    public void AddRoutes(IEndpointRouteBuilder app)
+    {
+        app.MapDelete("/Files/{fileId}", async (string fileId, ISender sender) =>
+            {
+                var result = await sender.Send(new DeleteFileAssetCommand(fileId));
+                var response = result.Adapt<DeleteFileAssetResponse>();
+
+                return Results.Ok(response);
+            })
+            .WithName("DeleteFileAsset")
+            .Produces<DeleteFileAssetResponse>()
+            .ProducesProblem(StatusCodes.Status400BadRequest)
+            .ProducesProblem(StatusCodes.Status404NotFound)
+            .WithSummary("Delete File Asset")
+            .WithDescription("Delete File Asset");
+    }
+}
+
+public record DeleteFileAssetResponse(bool IsSuccess);

Backend/src/Modules/Files/Files.Application/Entities/Files/Commands/DeleteFileAsset/DeleteFileAssetCommand.cs

@@ -0,0 +1,13 @@
+namespace Files.Application.Entities.Files.Commands.DeleteFileAsset;
+
+public record DeleteFileAssetCommand(string FileAssetId) : ICommand<DeleteFileAssetResult>;
+
+public record DeleteFileAssetResult(bool IsSuccess);
+
+public class DeleteFileAssetCommandValidator : AbstractValidator<DeleteFileAssetCommand>
+{
+    public DeleteFileAssetCommandValidator()
+    {
+        RuleFor(x => x.FileAssetId).NotEmpty().WithMessage("FileAssetId is required");
+    }
+}

Backend/src/Modules/Files/Files.Application/Entities/Files/Commands/DeleteFileAsset/DeleteFileAssetHandler.cs

@@ -0,0 +1,22 @@
+using Files.Application.Entities.Files.Exceptions;
+
+namespace Files.Application.Entities.Files.Commands.DeleteFileAsset;
+
+public class DeleteFileAssetHandler(IFilesDbContext dbContext) : ICommandHandler<DeleteFileAssetCommand, DeleteFileAssetResult>
+{
+    public async Task<DeleteFileAssetResult> Handle(DeleteFileAssetCommand command, CancellationToken cancellationToken)
+    {
+        var fileAsset = await dbContext.FileAssets
+            .AsNoTracking()
+            .SingleOrDefaultAsync(f => f.Id == FileAssetId.Of(Guid.Parse(command.FileAssetId)), cancellationToken);
+
+        if (fileAsset is null)
+            throw new FileAssetNotFoundException(command.FileAssetId);
+
+
+        dbContext.FileAssets.Remove(fileAsset);
+        await dbContext.SaveChangesAsync(cancellationToken);
+
+        return new DeleteFileAssetResult(true);
+    }
+}