public Task<Book> UpdateAsync(Book item)
{
Book bookToUpdate = _books.Find(b => b.BookId == item.BookId);
int ix = _books.IndexOf(bookToUpdate);
_books[ix] = item;
return Task.FromResult(_books[ix]);
}
private void LoadBook(object sender, BookInfoEvent bookInfo)
{
if (bookInfo.BookId == 0)
{
Book = new Book();
}
else
{
Book = _booksService.GetBook(bookInfo.BookId);
}
}
public async Task<Book> AddOrUpdateBookAsync(Book book)
{
Book updated = null;
if (book.BookId == 0)
{
updated = await _booksRepository.AddAsync(book);
_books.Add(updated);
}
else
{
updated = await _booksRepository.UpdateAsync(book);
Book old = _books.Where(b => b.BookId == updated.BookId).Single();
int ix = _books.IndexOf(old);
_books.RemoveAt(ix);
_books.Insert(ix, updated);
}
return updated;
}
private async void OnSaveBook()
{
Book = await _booksService.AddOrUpdateBookAsync(Book);
}
public Task<Book> AddAsync(Book item)
{
item.BookId = _books.Select(b => b.BookId).Max() + 1;
_books.Add(item);
return Task.FromResult(item);
}