/// <summary>
/// The cstomSearch method, searches for the first avalible bookcopy of a bookID
/// </summary>
/// <param name="searchItem">BookID to search for copies with</param>
/// <returns>First avalible copy of the book with the bookID</returns>
public BookCopy CustomSearch(string searchItem)
{
int id = Convert.ToInt16(searchItem);
var bookcopy = bookCopyRepo.All().Where(b => b.Book.Id == id).First();
return(bookcopy);
}
/// <summary>
/// Method to make a loan of a book for a member.
/// </summary>
/// <param name="member">Member that makes the loan.</param>
/// <param name="book">Book the member wants to loan.</param>
public void MakeLoan(Member member, Book book)
{
if (null == bookRepository.Find(book.ISBN))
{
throw new ArgumentException("No book wit ISBN: " + book.ISBN + " found in database.");
}
else
{
List <int> noOfCopiesOnLoan = loanRepository.All().
Where(loan => loan.TimeOfReturn == null).
Where(loan => loan.Copy.Book.ISBN == book.ISBN).
Select(loan => loan.Copy.ID).
ToList();
BookCopy copyToLoan = bookCopyRepository.All().
Where(c => false == noOfCopiesOnLoan.Contains(c.ID)).
Where(c => c.Book.ISBN == book.ISBN).
FirstOrDefault();
if (null == copyToLoan)
{
throw new ArgumentException("No bookcopy available for Title: " + book.Title + ".");
}
else
{
MakeLoan(member, copyToLoan);
}
}
}
//All available copies
public IEnumerable <BookCopy> AllAvailableCopies()
{
IEnumerable <BookCopy> copies = _bookCopyRepository.All();
IEnumerable <Loan> loan = _loanRepository.All();
var loanedbooks = from c in copies
from l in loan
where c.Id == l.BookCopy.Id
select c;
return(copies.Except(loanedbooks));
}
/// <summary>
/// Method to get books available books for loan.
/// </summary>
/// <returns>IEnumerable<Book></returns>
public IEnumerable <Book> GetAllAvailableBooks()
{
var BookCopysOnLoan = loanRepository.All().
Where(loan => loan.TimeOfReturn == null).
Select(loan => loan.Copy.ID);
var BookCopysNotOnLoan = bookCopyRepository.All().
Where(copy => false == BookCopysOnLoan.Contains(copy.ID)).
Select(copy => copy.Book).
Distinct().
ToList();
return(BookCopysNotOnLoan);
}
/// <summary>
/// Method to access available copies for loan of a specified book.
/// </summary>
/// <param name="book">Book to check copies of</param>
/// <returns>int with the number of copies is available</returns>
public int GetNoOfAvailableCopies(Book book)
{
List <int> noOfCopiesOnLoan = loanRepository.All().
Where(loan => loan.TimeOfReturn == null).
Where(loan => loan.Copy.Book.ISBN == book.ISBN).
Select(loan => loan.Copy.ID).
ToList();
int NoOfCopiesNotOnLoan = bookCopyRepository.All().
Where(copy => false == noOfCopiesOnLoan.Contains(copy.ID)).
Where(copy => copy.Book.ISBN == book.ISBN).
Count();
return(NoOfCopiesNotOnLoan);
}
/// <summary>
/// The Remove method, used to return a loan.
/// </summary>
/// <param name="item">Loan to return</param>
public void Remove(Loan item)
{
var bookCopy = bookCopyRepo.All().Where(bc => bc.IsLoaned == true && bc.Id == item.BookCopy.Id).First();
item.Returned = DateTime.Today;
bookCopy.IsLoaned = false;
loanRepo.Edit(item);
var member = memberRepo.All().Where(m => m == item.Member).First();
member.Loans.Remove(item);
memberRepo.Edit(member);
OnUpdated(EventArgs.Empty);
}
/// <summary>
/// Uses the BookCopy repository to get all Book object from the database.
/// </summary>
/// <returns>A IEnumerable<Book> including all Book objects from the database.</returns>
public IEnumerable <BookCopy> All()
{
return(bookCopyRepository.All());
}
/// <summary>
/// Check if a BookCopy is on loan
/// </summary>
/// <param name="bookCopy">The book copy to check</param>
/// <returns>True if the book is on loan, false otherwise</returns>
public bool CheckIfBookIsOnLoan(BookCopy bookCopy)
{
return(!FindAllAvailableBooks(bookCopyRepository.All(), All()).Contains(bookCopy));
}
/// <summary>
/// Returns all bookcopies
/// </summary>
/// <returns></returns>
public IEnumerable <BookCopy> All()
{
return(bookCopyRepository.All().OrderBy(book => book.BookObject.Id));
}
