ex15_30_Basket.h

/*
=================================================================================

C++ Primer 5th Exercise Answer Source Code
Copyright (C) 2014-2015 https://github.com/pezy/Cpp-Primer

Basket.

If you have questions, try to connect with me: pezy<urbancpz@gmail.com>

=================================================================================
*/

#ifndef CP5_EX15_30_BASKET_H
#define CP5_EX15_30_BASKET_H

#include <memory>
#include <set>
#include "ex15_30_Quote_Bulk_quote.h"

namespace EX30 {
    using std::shared_ptr;

    class Basket {
    public:
        Basket() = default;
        void add_item(const Quote &sale) { items.insert(shared_ptr<Quote>(sale.clone())); }
        void add_item(Quote &&sale) { items.insert(shared_ptr<Quote>(std::move(sale).clone())); }
        inline double total_receipt(std::ostream&) const;
    private:
        static bool compare(const shared_ptr<Quote> &lhs, const shared_ptr<Quote> &rhs) {
            return lhs->isbn() < rhs->isbn();
        }
        std::multiset<shared_ptr<Quote>, decltype(compare)*> items{compare};
    };

    inline double Basket::total_receipt(std::ostream &os) const {
        auto sum = 0.0;
        for (auto iter = items.cbegin(); iter != items.cend(); iter = items.upper_bound(*iter)) {
            sum += print_total(os, **iter, items.count(*iter));
        }
        os << "Total Sale: " << sum << std::endl;
        return sum;
    }
}

#endif //CP5_EX15_30_BASKET_H