/// <summary>
/// Sorts books by condition that is provided by comparer.
/// </summary>
/// <param name="comparer">Comparer that will be used for sorting.</param>
public IEnumerable <Book> SortBy(IComparer <Book> comparer)
{
BookValidator.CheckOnNull(comparer);
var booksToSort = books.ToList();
booksToSort.Sort(comparer);
return(booksToSort);
}
/// <summary>
/// Removes book from books.
/// </summary>
/// <param name="book">Book to add.</param>
/// <exception cref="ItemIsNotFoundException">When book to remove doesn't exist.</exception>
/// <exception cref="ArgumentNullException">Thrown when book is null.</exception>
public void Remove(Book book)
{
BookValidator.CheckOnNull(book);
if (!this.books.Contains(book))
{
throw new BookIsNotFoundException($"{nameof(book)} isn't found in list.");
}
books.Remove(book);
}
/// <summary>
/// Adds book to books.
/// </summary>
/// <param name="book">Book to add.</param>
/// <exception cref="DuplicateItemException">Thrown when there is a try to add already existing book.</exception>
/// <exception cref="ArgumentNullException">Thrown when book is null.</exception>
public void Add(Book book)
{
BookValidator.CheckOnNull(book);
if (this.books.Contains(book))
{
throw new DuplicateBookException($"{nameof(book)} is already in list.");
}
books.Add(book);
}
/// <summary>
/// Compares this book instance with given.
/// </summary>
/// <param name="other">Other book.</param>
/// <returns>Result of comparison.</returns>
public int CompareTo(Book other)
{
BookValidator.CheckOnNull(other);
return(other.isbn.CompareTo(this.isbn));
}
/// <summary>
/// Initializes a new instance of the <see cref="BookListService"/> class.
/// </summary>
/// <param name="storage">Storage for books.</param>
public BookListService(IBookListStorage storage)
{
BookValidator.CheckOnNull(storage);
this.bookListStorage = storage;
}
/// <summary>
/// Finds books that satisfy some criteria.
/// </summary>
/// <param name="searchCriteria">Search criteria.</param>
/// <returns>Found books.</returns>
public IEnumerable <Book> FindByTag(ISearchCriteria <Book> searchCriteria)
{
BookValidator.CheckOnNull(searchCriteria);
return(GetMatchedBooks(searchCriteria));
}