/// <summary>
/// Adds a new Book to database context and to local memory collection.
/// Raises <event>OnDatabaseError</event> when exception is thrown from changing the database context.
/// </summary>
/// <param name="book">Book object to be added</param>
/// <returns>Returns true if operation is successful, false otherwise</returns>
public bool AddBook(Book book)
{
if (!IsLibrarian)
{
return(false); //if not a librarian return false
}
try
{
//add book to database context
context.Books.Add(book);
context.SaveChanges();
}
catch (Exception ex)
{
//send OnDatabaseError event
while (ex != null)
{
ex = ex.InnerException;
}
DatabaseEventArgs e = new DatabaseEventArgs(ex.Message);
OnDatabaseErrorRaised(e);
return(false);
}
bookInventory.Add(book);
return(true);
}
////Returns a generic list of all Book objects in bookInventory whose ISBN contains the string in the argument.
//public List<Book> SearchByISBN(string isbn)
//{
// var result = (from b in bookInventory
// where b.ISBN.ToLower().Contains(isbn.ToLower())
// select b).ToList();
// return result;
//}
////Returns a generic list of all Book objects in bookInventory whose title contains the the string in the argument.
//public List<Book> SearchByTitle(string title)
//{
// var result = (from b in bookInventory
// where b.Title.ToLower().Contains(title.ToLower())
// select b).ToList();
// return result;
//}
////Returns a generic list of all Book objects in bookInventory whose author's first name or last name contains
////the string in the argument.
//public List<Book> SearchByAuthor(string author)
//{
// var result = (from b in bookInventory
// where b.Author.Person.FirstName.ToLower().Contains(author.ToLower()) ||
// b.Author.Person.LastName.ToLower().Contains(author.ToLower())
// select b).ToList();
// return result;
//}
////Returns a generic list of all Book objects in bookInventory whose subject contains the string in the argument.
//public List<Book> SearchBySubject(string subject)
//{
// var result = (from b in bookInventory
// where b.Subject.ToLower().Contains(subject.ToLower())
// select b).ToList();
// return result;
//}
/// <summary>
/// Finds all Book objects in the collection that contain the search token
/// </summary>
/// <param name="searchToken">string used to find Book objects</param>
/// <returns>Returns a BookInventory that contains all Book objects in this collection that match the search token</returns>
public BookInventory FindAll(string searchToken)
{
string token = searchToken.ToLower();
BookInventory result = new BookInventory();
foreach (Book b in bookInventory)
{
if (b.ContainsToken(token))
{
result.Add(b);
}
}
return(result);
}
