public Contact Add(Contact contact)
{
//Validate input
if (contact == null)
{
throw new ArgumentNullException(nameof(contact));
}
ObjectValidator.Validate(contact);
//contact names must be unique
var existing = FindByName(contact.Name);
if (existing != null)
{
throw new Exception("Contact must be unique.");
}
return(AddCore(contact));
}
public Contact Update(int id, Contact contact)
{
//Validate
if (id <= 0)
{
throw new ArgumentOutOfRangeException(nameof(id), "Id must be > 0.");
}
if (contact == null)
{
throw new ArgumentNullException(nameof(contact));
}
ObjectValidator.Validate(contact);
var sameName = FindByName(contact.Name);
if (sameName != null && sameName.Id != id)
{
throw new Exception("Contact info must be unique.");
}
return(UpdateCore(id, contact));
}