MyBookmark/Modules.User.Application/Commands/User/PersonalData/DeleteUserAvatarCommand.cs

using Common.Security.Interfaces;
using MediatR;
using Modules.Media.Api.Commands;
using Modules.User.Application.Interfaces;
using Modules.User.Application.Repositories;

namespace Modules.User.Application.Commands.User;

public class DeleteUserAvatarCommand : IRequest<Unit>
{
}

public class DeleteUserAvatarCommandHandler(IUserContext userContext, IUserRepository userRepository,
    IMediator mediator, IUnitOfWork unitOfWork) : IRequestHandler<DeleteUserAvatarCommand, Unit>
{
    public async Task<Unit> Handle(DeleteUserAvatarCommand request, CancellationToken cancellationToken)
    {
        var accountId = userContext.GetAccountId();
        if (!accountId.HasValue) return Unit.Value;
        //TODO: if (!accountId.HasValue) throw new UnauthorizedAccessException("AccountId not found");

        var user = await userRepository.GetByAccountIdAsync(accountId.Value, cancellationToken);
        if (user == null) return Unit.Value;
        //TODO: if (user == null) throw new UserNotFoundException(); //"User not found"
        
        if (user.Avatar != null)
        {
            var deleted = await mediator.Send(new DeleteObjectCommand
            {
                BucketName = "my-bookmark.user",
                ObjectName = user.Avatar.Id,
            }, cancellationToken);
            if (!deleted)
            {
                //TODO: log error //throw new Exception("Failed to delete avatar from storage");
                return Unit.Value;
            }
            user.SetAvatar(null);
        }
        await userRepository.SaveAsync(user, cancellationToken);
        await unitOfWork.SaveChangesAsync(cancellationToken);

        return Unit.Value;
    }
}