#include "BookInTheLibrary.h"

// перегрузка оператора присваивания
BookInTheLibrary& BookInTheLibrary::operator= (const BookInTheLibrary& ob) // оператор присваивания
{
    author_ = ob.author_;
    title_ = ob.title_;
    publishingYear_ = ob.publishingYear_;
    discipline_ = ob.discipline_;
    numberOfCopies_ = ob.numberOfCopies_;
    return *this;
}

// перегрузка бинарных операторов
BookInTheLibrary BookInTheLibrary::operator+ (unsigned int value)
{
    return BookInTheLibrary(numberOfCopies_ + value);
}
BookInTheLibrary BookInTheLibrary::operator- (unsigned int value)
{
    return BookInTheLibrary(numberOfCopies_ - value);
}

// перегрузка операторов отношения
bool BookInTheLibrary::operator== (const BookInTheLibrary& ob) const
{
    return (publishingYear_ == ob.publishingYear_);
}
bool BookInTheLibrary::operator> (const BookInTheLibrary& ob) const
{
    return (publishingYear_ > ob.publishingYear_);
}
bool BookInTheLibrary::operator< (const BookInTheLibrary& ob) const
{
    return (publishingYear_ < ob.publishingYear_);
}
bool BookInTheLibrary::operator>= (const BookInTheLibrary& ob) const
{
    return (publishingYear_ >= ob.publishingYear_);
}
bool BookInTheLibrary::operator<= (const BookInTheLibrary& ob) const
{
    return (publishingYear_ <= ob.publishingYear_);
}

// перегрузка операторов инкремента/декремента
BookInTheLibrary& BookInTheLibrary::operator++()
{
    ++numberOfCopies_;
    return *this;
}
BookInTheLibrary& BookInTheLibrary::operator--()
{
    --numberOfCopies_;
    return *this;
}

// перегрузка операторов ввода/вывода через дружественные функции
ostream& operator<< (ostream& out, const BookInTheLibrary& ob)
{
    out << "Author - " << ob.author_ << ", title - " << ob.title_ << ", publishing year - "
        << ob.publishingYear_ << ", recommended discipline - " << ob.discipline_
        << ", number of copies - " << ob.numberOfCopies_;
    return out;
}
istream& operator>> (istream& in, BookInTheLibrary& ob)
{
    in >> ob.author_;
    in >> ob.title_;
    in >> ob.publishingYear_;
    in >> ob.discipline_;
    in >> ob.numberOfCopies_;
    return in;
}

// конструкторы/деструктор
BookInTheLibrary::BookInTheLibrary() // конструктор без параметров
    : author_("N/A"), title_("N/A"), publishingYear_(0), discipline_("N/A"), numberOfCopies_(0) {}
BookInTheLibrary::BookInTheLibrary(string author, string title, unsigned int publishingYear, string discipline, unsigned int numberOfCopies) // конструктор копирования
    : author_(author), title_(title), publishingYear_(publishingYear), discipline_(discipline), numberOfCopies_(numberOfCopies) {}
BookInTheLibrary::BookInTheLibrary(unsigned int numberOfCopies) // конструктор копирования кол-ва копий
    : numberOfCopies_(numberOfCopies) {}
BookInTheLibrary::BookInTheLibrary(const BookInTheLibrary& ob) // конструктор копирования
    : author_(ob.author_), title_(ob.title_), publishingYear_(ob.publishingYear_),
    discipline_(ob.discipline_), numberOfCopies_(ob.numberOfCopies_) {}

BookInTheLibrary::~BookInTheLibrary() {}