public SignPunchOutCommandValidator(IInvitationValidator invitationValidator, IRowVersionValidator rowVersionValidator) { CascadeMode = CascadeMode.Stop; RuleFor(command => command) .MustAsync((command, cancellationToken) => BeAnExistingInvitation(command.InvitationId, cancellationToken)) .WithMessage(command => $"Invitation with this ID does not exist! Id={command.InvitationId}") .MustAsync((command, cancellationToken) => BeAnExistingParticipant(command.ParticipantId, command.InvitationId, cancellationToken)) .WithMessage(command => $"Participant with ID does not exist on invitation! Id={command.ParticipantId}") .MustAsync((command, cancellationToken) => BeANonCanceledInvitation(command.InvitationId, cancellationToken)) .WithMessage(command => "Invitation is canceled, and thus cannot be signed!") .Must(command => HaveAValidRowVersion(command.ParticipantRowVersion)) .WithMessage(command => $"Participant row version is not valid! ParticipantRowVersion={command.ParticipantRowVersion}") .MustAsync((command, cancellationToken) => BeASigningParticipantOnIpo(command.InvitationId, command.ParticipantId, cancellationToken)) .WithMessage(command => $"Participant is not assigned to sign this IPO! ParticipantId={command.ParticipantId}") .MustAsync((command, cancellationToken) => BeTheAssignedPersonIfPersonParticipant(command.InvitationId, command.ParticipantId, cancellationToken)) .WithMessage(command => "Person signing is not assigned to sign IPO, or there is not a valid functional role on the IPO!") .MustAsync((command, cancellationToken) => BeUnsignedParticipant(command.ParticipantId, command.InvitationId, cancellationToken)) .WithMessage(command => "Participant is already signed!"); async Task <bool> BeAnExistingInvitation(int invitationId, CancellationToken cancellationToken) => await invitationValidator.IpoExistsAsync(invitationId, cancellationToken); async Task <bool> BeANonCanceledInvitation(int invitationId, CancellationToken cancellationToken) => !await invitationValidator.IpoIsInStageAsync(invitationId, IpoStatus.Canceled, cancellationToken); async Task <bool> BeASigningParticipantOnIpo(int invitationId, int participantId, CancellationToken cancellationToken) => await invitationValidator.SignerExistsAsync(invitationId, participantId, cancellationToken); async Task <bool> BeTheAssignedPersonIfPersonParticipant(int invitationId, int participantId, CancellationToken cancellationToken) => await invitationValidator.CurrentUserIsValidSigningParticipantAsync(invitationId, participantId, cancellationToken); async Task <bool> BeAnExistingParticipant(int participantId, int invitationId, CancellationToken cancellationToken) => await invitationValidator.ParticipantExistsAsync(participantId, invitationId, cancellationToken); async Task <bool> BeUnsignedParticipant(int participantId, int invitationId, CancellationToken cancellationToken) => !await invitationValidator.ParticipantIsSignedAsync(participantId, invitationId, cancellationToken); bool HaveAValidRowVersion(string rowVersion) => rowVersionValidator.IsValid(rowVersion); }