public void DeleteStateDescription(StateDescription stateDescription)
{
if (!dataContext.Descriptions.Remove(stateDescription))
{
throw new ItemDoesNotExistException(stateDescription, dataContext.Descriptions);
}
}
public StateDescription(StateDescription description)
{
Code = description.Code;
Book = description.Book;
Availabile = description.Availabile;
PurchaseDate = description.PurchaseDate;
Location = description.Location;
}
public void AddStateDescription(StateDescription description)
{
if (!dataContext.Descriptions.Contains(description))
{
dataContext.Descriptions.Add((StateDescription)description);
}
else
{
throw new ItemAlreadyExistsException(description, dataContext.Descriptions);
}
}
public void UpdateStateDescription(StateDescription description)
{
int index = dataContext.Descriptions.IndexOf(description);
if (index == -1)
{
throw new ItemDoesNotExistException(description, dataContext.Descriptions);
}
dataContext.Descriptions[index] = (StateDescription)description;
}
public List <Event> GetAllTransactionsByBookState(StateDescription bookState)
{
List <Event> eventList = new List <Event>();
foreach (Event transaction in GetAllTransactions())
{
if (transaction.BookState.Equals(bookState))
{
eventList.Add(transaction);
}
}
return(eventList);
}
public void BorrowBook(Person person, long bookStateCode)
{
StateDescription state = repository.GetStateDescriptionByCode(bookStateCode);
if (state == null)
{
throw new ItemDoesNotExistException(bookStateCode, typeof(StateDescription));
}
if (!state.Availabile)
{
throw new BookUnavailableException(state);
}
state.Availabile = false;
repository.AddTransaction(new Event(person, state, Event.EventType.Borrow, DateTimeOffset.Now));
}
public Event(Person causer, StateDescription bookState, EventType type, DateTimeOffset date)
{
Code = getNextID();
Causer = causer;
Type = type;
BookState = bookState;
if (type == EventType.Borrow)
{
BorrowDate = date;
}
else
{
BookState = bookState;
}
}
public Person GetPersonByBorrowedBook(StateDescription book)
{
if (book.Availabile)
{
throw new BookNotUnavailableException(book);
}
foreach (Event transaction in GetAllTransactions())
{
if (transaction.BookState.Code == book.Code)
{
return(transaction.Causer);
}
}
throw new ItemDoesNotExistException(string.Format("Could not find person who borrowed {0}", book));
}
public void ReturnBook(long bookStateCode)
{
StateDescription state = repository.GetStateDescriptionByCode(bookStateCode);
if (state == null)
{
throw new ItemDoesNotExistException(bookStateCode, typeof(StateDescription));
}
if (!state.Availabile)
{
throw new BookNotUnavailableException(state);
}
Person person = GetPersonByBorrowedBook(state);
state.Availabile = true;
repository.AddTransaction(new Event(person, state, Event.EventType.Return, DateTimeOffset.Now));
}
public BookUnavailableException(StateDescription book) : base(string.Format("Book {0} is currently borrowed.", book))
{
}
public BorrowEvent(Person causer, StateDescription bookState, DateTimeOffset date) : base(causer, bookState, date)
{
}
public void AddStateDescription(StateDescription description)
{
repository.AddStateDescription(description);
}
public void DeleteStateDescription(StateDescription stateDescription)
{
repository.DeleteStateDescription(stateDescription);
}
public void UpdateStateDescription(StateDescription description)
{
repository.UpdateStateDescription(description);
}
