public IEnumerable <AggregateEvent> CloseAccount(CloseAccountCommand command)
{
if (this.AccountState == AccountState.Closed)
{
throw new InvalidOperationException($"Account {AccountNumber} is already closed.");
}
if (this.CurrentBalance > 0)
{
throw new InvalidOperationException($"Account {AccountNumber} still has money on it. Please withdraw before closing.");
}
var aggregateEvent = new AccountClosed(command.AccountNumber, ++SequenceNumber);
Handle(aggregateEvent);
return(new AggregateEvent[]
{
aggregateEvent
});
}
public void Handle(AccountClosed request)
{
this.AccountState = AccountState.Closed;
this.SequenceNumber = request.SequenceNumber;
}