/// <summary>
/// Insert/update the customer
/// If it already exists, update it, otherwise insert it.
/// If the email address has changed, raise a EmailAddressChanged event on DomainEvents
/// </summary>
public RopResult <Unit, DomainMessage> Upsert(Customer customer)
{
if (customer == null)
{
throw new ArgumentNullException("customer");
}
var db = new DbContext();
var existingDbCust = GetById(customer.Id);
var newDbCust = ToDbCustomer(customer);
return(Rop.Match(existingDbCust,
success =>
{
// update
db.Update(newDbCust);
// check for changed email
if (!customer.EmailAddress.Equals(success.EmailAddress))
{
// return a Success with the extra event
var msg = DomainMessage.EmailAddressChanged(success.EmailAddress, customer.EmailAddress);
return Rop.SucceedWithMsg <Unit, DomainMessage>(Unit.Instance, msg);
}
else
{
// return a Success with no extra event
return Rop.Succeed <Unit, DomainMessage>(Unit.Instance);
}
},
failure =>
{
// insert
db.Insert(newDbCust);
// return a Success
return Rop.Succeed <Unit, DomainMessage>(Unit.Instance);
}));
}