/// <summary>Remove book from storage</summary>
/// <param name="bls">this book storage</param>
/// <param name="isbn">book's isbn identifier</param>
public static void RemoveBook(this BookListStorage bls, string isbn)
{
if (isbn == null)
{
LogManager.GetCurrentClassLogger().Fatal("Can't remove book (book's isbn is null)!");
throw new ArgumentException();
}
bool wasRemoved = false;
foreach (Book book in bls.Library)
{
if (book.ISBN == isbn)
{
wasRemoved = true;
bls.Library.Remove(book);
LogManager.GetCurrentClassLogger().Info($"Book \"{book:S}\" was removed!");
break;
}
}
if (!wasRemoved)
{
LogManager.GetCurrentClassLogger().Fatal("Can't remove book (book wasn't found in library)!");
throw new ArgumentException();
}
}
/// <summary>Print library to stream</summary>
/// <param name="bls">this book storage</param>
/// <param name="tw">output textwritter stream</param>
public static void PrintLibrary(this BookListStorage bls, TextWriter tw)
{
if (tw == null)
{
throw new ArgumentException();
}
foreach (Book book in bls.Library)
{
tw.WriteLine(book.ToString());
}
}
/// <summary>Add book to storage</summary>
/// <param name="bls">this book storage</param>
/// <param name="book">book to add</param>
public static void AddBook(this BookListStorage bls, Book book)
{
if (book == null || bls.Library.Contains(book))
{
LogManager.GetCurrentClassLogger().Fatal("Can't add book (book is null or already in library)!");
throw new ArgumentException();
}
bls.Library.Add(book);
LogManager.GetCurrentClassLogger().Info($"Book \"{book:S}\" was added!");
}
/// <summary>Find books by tag</summary>
/// <param name="bls">this book storage</param>
/// <param name="tag">tag to find</param>
/// <param name="tagData">tag data to find</param>
/// <returns></returns>
public static List <Book> FindBooksByTag(this BookListStorage bls, TAG tag, object tagData)
{
if (tagData == null)
{
throw new ArgumentException();
}
var result = new List <Book>();
foreach (Book book in bls.Library)
{
switch (tag)
{
case TAG.ISBN:
if (book.ISBN == tagData as string)
{
result.Add(book);
}
break;
case TAG.AUTHOR:
if (book.Author == tagData as string)
{
result.Add(book);
}
break;
case TAG.TITLE:
if (book.Title == tagData as string)
{
result.Add(book);
}
break;
case TAG.PUBLISHER:
if (book.Publisher == tagData as string)
{
result.Add(book);
}
break;
case TAG.YEAR:
if (tagData as int? != null && book.Year == tagData as int?)
{
result.Add(book);
}
break;
case TAG.PAGES:
if (tagData as int? != null && book.Pages == tagData as int?)
{
result.Add(book);
}
break;
case TAG.PRICE:
if (tagData as int? != null && book.Price == tagData as int?)
{
result.Add(book);
}
break;
}
}
return(result);
}
/// <summary>Sort books in storage by tag</summary>
/// <param name="bls">this book storage</param>
/// <param name="tag">tag to sort</param>
public static void SortBooksByTag(this BookListStorage bls, TAG tag)
{
bls.Library.Sort(new BookTagComparer(tag));
LogManager.GetCurrentClassLogger().Info($"Library was sorted!");
}