reply-code-challenge/recorder.h

#ifndef _RECORDER
#define _RECORDER

#include <iostream>
#include <fstream>
#include <ostream>
#include <istream>
#include <streambuf>
#include <filesystem>

namespace fs = std::filesystem;

template <typename T>
struct Recorder
{
    bool verbose;
    std::string name;
    T global_best_task;
    T current_best_task;
    long long global_best_score;
    long long current_best_score;

    Recorder(std::string name = "") : name(name)
    {
        verbose = false;
        global_best_score = 0;
        current_best_score = 0;
    }

    void set_verbose(bool verbose = true)
    {
        this->verbose = verbose;
    }

    void submit(T &task)
    {
        auto task_score = task.score();

        if (task_score > global_best_score)
        {
            std::cout << "Best improved: " << task_score << " <-- " << global_best_score << std::endl;
            current_best_score = global_best_score = task_score;
            current_best_task = global_best_task = task;

            if (name == "")
            {
                std::cout << "Warning: No name assigned for this recorder." << std::endl;
                return;
            }

            fs::path tasks = "tasks";
            std::fstream fs_score, fs_submit, fs_info;

            fs_score.open(tasks / (name + ".score"));
            fs_score << task_score << std::endl;
            fs_score.close();

            fs_submit.open(tasks / (name + ".out"));
            fs_info.open(tasks / (name + ".info"));
            task.save(fs_submit, fs_info);
            fs_submit.close();
            fs_info.close();
        }
        else if (task_score > current_best_score)
        {
            std::cout << "Current improved: " << task_score << " <-- " << current_best_score << std::endl;
            current_best_score = task_score;
            current_best_task = task;

            if (verbose)
            {
                task.save(std::cout, std::cerr);
            }
        }
    }

    void load(T &task)
    {
        fs::path tasks = "tasks";
        std::ifstream fs_score, fs_submit, fs_info;
        auto cur_name = tasks / (name + ".score");
        fs_score.open(tasks / (name + ".score"));
        fs_score >> global_best_score;
        fs_score.close();
        fs_submit.open(tasks / (name + ".out"));
        fs_info.open(tasks / (name + ".info"));
        task.load(fs_submit, fs_info);
        fs_submit.close();
        fs_info.close();

        std::cout << "Loaded Task: " << name << " Score: " << global_best_score << std::endl;
    }
};

template <typename T>
void print(T &task)
{
    task.save(std::cout, std::cerr);
}

#endif