geekbrains_cpp_difficult_moments/lesson_1/main.cpp

/*
 * main.cpp
 *
 *  Created on: 22 сент. 2021 г.
 *      Author: alexander
 */
#include <iostream>
#include <string>
#include <optional>
#include <tuple>
#include <vector>
#include <fstream>
#include <sstream>
#include <any>

using namespace std;

struct Person
{
    string firstname;
    string lastname;
    optional<string> patronymic = nullopt;
};

ostream& operator<<(ostream &out, const Person &p)
{
    out << p.firstname << ' ' << p.lastname << ' ' << p.patronymic.value_or("");

    return out;
}

bool operator<(const Person &p1, const Person &p2)
{
    string patr1 = p1.patronymic.value_or("");
    string patr2 = p2.patronymic.value_or("");

    return tie(p1.firstname, p1.lastname, patr1)
            < tie(p2.firstname, p2.lastname, patr2);
}

bool operator==(const Person &p1, const Person &p2)
{
    string patr1 = p1.patronymic.value_or("");
    string patr2 = p2.patronymic.value_or("");

    return tie(p1.firstname, p1.lastname, patr1)
            == tie(p2.firstname, p2.lastname, patr2);
}

struct PhoneNumber
{
    int country_code;
    int city_code;
    string number;
    optional<int> additional_number = nullopt;
};

ostream& operator<<(ostream &out, const PhoneNumber &p)
{
    out << '+' << p.country_code << '(' << p.city_code << ')' << p.number;

    if (p.additional_number.has_value())
    {
        out << ' ' << p.additional_number.value();
    }

    return out;
}

using perPhone = vector<pair<Person, PhoneNumber>>;

class PhoneBook
{
private:
    perPhone m_data;
public:
    PhoneBook(ifstream &file)
    {
        if (!file)
        {
            cout << "Не удаётся открыть файл!" << endl;
            exit(-1);
        }

        while (file)
        {
            string s;

            getline(file, s, '\n');

            stringstream str;
            str << s;

            pair<Person, PhoneNumber> entry;

            for (int i = 0; str; ++i)
            {
                switch (i)
                {
                    case 0:
                        str >> entry.first.firstname;
                        break;
                    case 1:
                        str >> entry.first.lastname;
                        break;
                    case 2:
                        str >> s;
                        entry.first.patronymic = s;
                        break;
                    case 3:
                        str >> entry.second.country_code;
                        break;
                    case 4:
                        str >> entry.second.city_code;
                        break;
                    case 5:
                        str >> entry.second.number;
                        break;
                    case 6:
                        int num;
                        str >> num;
                        entry.second.additional_number = num;
                        break;
                }
            }

            m_data.push_back(entry);
        }
    }

    friend ostream& operator<<(ostream &out, const PhoneBook &pb);
};

ostream& operator<<(ostream &out, const PhoneBook &pb)
{
    for (const auto& [first, second] : pb.m_data)
    {
        out << first << ' ' << second << endl;
    }

    return out;
}

int main()
{
    ifstream file("PhoneBook.txt");
    PhoneBook book(file);
    cout << book;

    return 0;
}