public DeleteTagCommandValidator(
ITagValidator tagValidator,
IRowVersionValidator rowVersionValidator)
{
CascadeMode = CascadeMode.Stop;
RuleFor(command => command)
.MustAsync((command, token) => BeAnExistingTagAsync(command.TagId, token))
.WithMessage(command => $"Tag doesn't exist! Tag={command.TagId}")
.MustAsync((command, token) => BeAVoidedTagAsync(command.TagId, token))
.WithMessage(command => $"Tag is not voided! Tag={command.TagId}")
.MustAsync((command, token) => NotBeInUse(command.TagId, token))
.WithMessage(command => $"Tag is in use! Tag={command.TagId}")
.Must(command => HaveAValidRowVersion(command.RowVersion))
.WithMessage(command => $"Not a valid row version! Row version={command.RowVersion}");
async Task <bool> BeAnExistingTagAsync(int tagId, CancellationToken token)
=> await tagValidator.ExistsAsync(tagId, token);
async Task <bool> BeAVoidedTagAsync(int tagId, CancellationToken token)
=> await tagValidator.IsVoidedAsync(tagId, token);
async Task <bool> NotBeInUse(int tagId, CancellationToken token)
=> !await tagValidator.IsInUseAsync(tagId, token);
bool HaveAValidRowVersion(string rowVersion)
=> rowVersionValidator.IsValid(rowVersion);
}