//добавление книг
public void Add_book(Book book)
{
Book_Subscr newbook = new Book_Subscr(book, null, DateTime.Today.Date);
Books_in_Lib.Add(newbook);
BookAdded?.Invoke(this, book);
}
public void Test_Sub_missing()
{
Book_Subscr newbook = new Book_Subscr(book1, sub1, Convert.ToDateTime("11.05.2017"));
library.Books_in_Lib.RemoveAt(library.Book_Index(book1));
library.Books_in_Lib.Add(newbook);
Assert.AreEqual(sub1.Missing_book()[0].Name, "Преступление и наказание");
}
//выдача книг
public void Give_book(Subscriber sub, Book book)
{
if (Books_in_Lib.Count != 0)
{
if (sub.Missing_book().Count != 0)
{
Console.WriteLine("Выдача книги не возможна");
}
else
{
if (sub.Having_book().Count == 5)
{
Console.WriteLine("Выдача книги не возможна");
}
else
{
int rare_num_book = 0;
foreach (Book b in sub.Having_book())
{
if (b.Rare == true)
{
rare_num_book++;
}
}
if ((rare_num_book < 2 && book.Rare != true) || (rare_num_book < 1 && book.Rare == true))
{
int num = Book_Index(book);
if (num != -1)
{
Books_in_Lib.RemoveAt(Book_Index(book));
Book_Subscr newbook = new Book_Subscr(book, sub, DateTime.Today.Date);
Books_in_Lib.Add(newbook);
state = Book_State.notinLib;
StateChanged?.Invoke(this, state);
}
else
{
Console.WriteLine("Такой книги нет");
}
}
else
{
Console.WriteLine("Выдача книги невозможна");
}
}
}
}
else
{
Console.WriteLine("В библиотеке нет книг");
}
}
//поиск по названию
public Book_Subscr Name_search(string book_name)
{
Book_Subscr book = new Book_Subscr();
for (int i = 0; i < Books_in_Lib.Count(); i++)
{
if (Books_in_Lib[i].book.Name == book_name)
{
book = Books_in_Lib[i];
}
}
return(book);
}
//поиск по автору
public Book_Subscr Author_search(string aurth_name)
{
Book_Subscr book = new Book_Subscr();
for (int i = 0; i < Books_in_Lib.Count(); i++)
{
if (Books_in_Lib[i].book.Author == aurth_name)
{
book = Books_in_Lib[i];
}
}
return(book);
}
//Поиск по автору или названию
public Book_Subscr this[string author, string name]
{
get
{
Book_Subscr b = new Book_Subscr();
foreach (Book_Subscr book in Books_in_Lib)
{
if (book.book.Name == name || book.book.Author == author)
{
b = book;
break;
}
}
if (b.book == null)
{
throw new Exception();
}
else
{
return(b);
}
}
}
//возврат книг
public void Return_book(Book book)
{
if (Books_in_Lib.Count() != 0)
{
int num = Book_Index(book);
if (num == -1)
{
Console.WriteLine("Книгу брали не из данной библиотеки");
}
else
{
Books_in_Lib.RemoveAt(num);
Book_Subscr newbook = new Book_Subscr(book, null, DateTime.Today.Date);
Books_in_Lib.Add(newbook);
state = Book_State.inLib;
StateChanged?.Invoke(this, state);
}
}
else
{
Console.WriteLine("Возврат не возможен, в библиотеке нет книг");
}
}
