public ChangeMemberNameValidator(IMemberRepository memberRepository)
{
RuleFor(x => x.Id).NotEmpty();
RuleFor(x => x.Name).NotEmpty();
When(x => x.Id != Guid.Empty && x.Name.Length != 0, () =>
{
RuleFor(x => x)
.MustAsync((x, ct) => memberRepository.ExistsWithIdAsync(x.Id, ct))
.WithMessage(x => $"Record not found for member with given id {x.Id}.")
.WithName("Id")
.WithErrorCode(nameof(HttpStatusCode.NotFound))
.MustAsync((x, ct) => memberRepository.CanChangeNameAsync(x.Id, x.Name, ct))
.WithMessage(x => $"Record already exists for member with given name {x.Name}.")
.WithName("Name")
.WithErrorCode(nameof(HttpStatusCode.Conflict));
});
}