public void UpdateAuthorID(string firstName, string lastName)
{
//First, retirve the names of the author already associated with the book
if (firstName != FirstName || lastName != LastName)
{
//The author entered is different from the current author
//Find the ID of the new author
AuthorSearch search = new AuthorSearch(people, firstName, lastName);
if (search.Author == null)
{
AuthorBuilder = new AuthorBuilder(people, firstName, lastName);
if (search.FoundPersons.Count == 0)
{
//This is an entirely new person
AuthorBuilder.IsNewPerson = true;
}
else
{
//This person is already in the database, but not as an author yet.
AuthorBuilder.IsNewAuthor = true;
AuthorID = search.FoundPersons[0].ID;
AuthorBuilder.SetID(AuthorID);
}
}
else
{
AuthorID = search.Author.ID;
}
ChangeAuthorID = true;
}
}
/// <summary>
/// Checks the given names, if the author exists the ID will be retrived now, or a new author will be created.
/// </summary>
/// <param name="FirstName"></param>
/// <param name="LastName"></param>
public void CheckNames(string FirstName, string LastName)
{
authorFirstName = FirstName;
authorLastName = LastName;
List <PersonBLL> personBLLs = (from p in people
where p.FirstName == authorFirstName && p.LastName == authorLastName
select p).ToList();
if (personBLLs.Count == 0)
{
//There is no one in the collection with this name, this is an entirely new person
AuthorBuilder = new AuthorBuilder(people, authorFirstName, authorLastName);
AuthorBuilder.IsNewPerson = true;
}
else
{
bool authorFound = false;
//There is someone with this name combination, check if they are already an author
foreach (PersonBLL p in personBLLs)
{
if (p is AuthorBLL a)
{
//An author with this name was found.
authorFound = true;
authorID = p.ID;
Book.AuthorID = p.ID;
}
}
if (!authorFound)
{
AuthorBuilder = new AuthorBuilder(people, authorFirstName, authorLastName);
AuthorBuilder.IsNewAuthor = true;
authorID = personBLLs[0].ID;
Book.AuthorID = authorID;
AuthorBuilder.SetID(authorID);
}
}
}