public UpdateAttendedStatusOnParticipantCommandValidator(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) =>
NotBeCancelledInvitation(command.InvitationId, cancellationToken))
.WithMessage(command =>
$"Cannot perform updates on cancelled invitation! Id={command.InvitationId}")
.MustAsync((command, cancellationToken) =>
BeAnExistingParticipant(command.ParticipantId, command.InvitationId, cancellationToken))
.WithMessage(command =>
$"Participant with ID does not exist on invitation! ParticipantId={command.ParticipantId}")
.Must(command => HaveAValidRowVersion(command.RowVersion))
.WithMessage(command =>
$"Participant doesn't have valid rowVersion! ParticipantRowVersion={command.RowVersion}")
.MustAsync((command, cancellationToken) =>
HavePermissionToEdit(command.ParticipantId, command.InvitationId, cancellationToken))
.WithMessage("The current user does not have sufficient privileges to edit this participant.")
.MustAsync((command, cancellationToken) =>
HaveOppositeAttendedStatusIfTouched(command.ParticipantId, command.InvitationId, command.Attended, cancellationToken))
.WithMessage("Cannot update participant to its current attendedStatus.");
async Task <bool> BeAnExistingInvitation(int invitationId, CancellationToken cancellationToken)
=> await invitationValidator.IpoExistsAsync(invitationId, cancellationToken);
async Task <bool> NotBeCancelledInvitation(int invitationId, CancellationToken cancellationToken)
=> !await invitationValidator.IpoIsInStageAsync(invitationId, IpoStatus.Canceled, cancellationToken);
async Task <bool> BeAnExistingParticipant(int participantId, int invitationId, CancellationToken cancellationToken)
=> await invitationValidator.ParticipantExistsAsync(participantId, invitationId, cancellationToken);
async Task <bool> HavePermissionToEdit(int participantId, int invitationId, CancellationToken cancellationToken)
=> await invitationValidator.HasPermissionToEditParticipantAsync(participantId, invitationId, cancellationToken);
async Task <bool> HaveOppositeAttendedStatusIfTouched(int participantId, int invitationId, bool attended, CancellationToken cancellationToken)
=> await invitationValidator.HasOppositeAttendedStatusIfTouchedAsync(participantId, invitationId, attended, cancellationToken);
bool HaveAValidRowVersion(string rowVersion)
=> rowVersionValidator.IsValid(rowVersion);
}