public void UpdateFrom(Contact contact)
{
Name = string.IsNullOrEmpty(contact.Name) ? Name : contact.Name;
Gender = contact.Gender;
DateOfBirth = contact.DateOfBirth == DateTime.MinValue ? DateOfBirth : contact.DateOfBirth;
Email = string.IsNullOrEmpty(contact.Email) ? Email : contact.Email;
}
public void UpdateContact(int contactId, Contact contact)
{
var existing = GetContact(contactId);
existing.UpdateFrom(contact);
}
public void AddContact(Contact contact)
{
SaveContact(contact);
}
public void SaveContact(Contact contact)
{
if (contact.Id <= 0)
{
contact.Id = _contactIdSequence++;
}
lock (_contacts)
{
if (_contacts.Count > MaxItems)
throw new AppException("Too many contacts. Please delete some.");
_contacts[contact.Id] = contact;
}
}