Kontrolno2_BP2_zad4

#include <iostream>
#include <string>
#include <conio.h>
#include <fstream>

#if __has_include(<regex>)
#define has_regex true
#include <regex>
#endif

using namespace std;

struct Cars {
    string marka;
    string nomer;
};


auto input_cars(Cars *, size_t) -> void;
auto output_cars(Cars *, size_t) -> void;
auto search_cars(Cars *, size_t) -> void;
auto change_car_number(Cars *, size_t) -> void;

int main() {

    size_t choice, count(0);

    Cars *cars = nullptr;

    do {
        system("cls");

        cout << "Menu: \n\n";
        cout << "[1] Input cars\n";
        cout << "[2] Search in file\n";
        cout << "[3] Change car number\n";
        cout << "[4] Output information from the file\n\n";
        cout << "[0] Exit\n";

        cout << "Your choice: ";
        cin >> choice;

        switch (choice) {
        case 1:
            system("cls");

            cout << "Enter number of cars: ";
            cin >> count;

            if (!cin || !count)
                cout << "Error: invalid number of cars";

            cars = new Cars[count];

            input_cars(cars, count);

            cout << "\n\nPress any key to get back to the menu!";
            _getch();

            break;

        case 2:
            system("cls");

            search_cars(cars, count);

            cout << "\n\nPress any key to get back to the menu!";
            _getch();


            break;

        case 3: {
            system("cls");

            change_car_number(cars, count);

            cout << "\n\nPress any key to get back to the menu!";
            _getch();

            break;
        }
        case 4:
            system("cls");

            output_cars(cars, count);

            cout << "\n\nPress any key to get back to the menu!";
            _getch();

            break;
        }

    } while (choice != 0);

    return 0;
}

auto input_cars(Cars *cars, size_t count) -> void {

    fstream file("cars.dat", ios::binary | ios::out);

    cin.ignore();

    for (size_t i = 0; i < count; i++) {
        bool isCorrect(false);

        cout << "Enter the brand of car #" << i << " : ";
        getline(cin, cars[i].marka);

        do {

            cout << "Enter car number: ";
            getline(cin, cars[i].nomer);

#if has_regex
            if (regex_match(cars[i].nomer, static_cast<regex> ("[A-Z]{1} [0-9]{4} [A-Z]{2}")))
                for (size_t j = 0; j < count - 1; j++)
                    if (cars[j].nomer == cars[i].nomer && j != i)
                        cout << "\n\nThe car number must be 9 characters and UNIQUE!\n\n";
                    else
                        isCorrect = true;
#else
            if (cars[i].nomer.length() == 9) {
                for (size_t j = 0; j < count - 1; j++)
                    if (cars[j].nomer == cars[i].nomer  && j != i)
                        isCorrect = true;
                    else
                        cout << "\n\nThe car number must be 9 characters and UNIQUE!\n\n";
            }
#endif

        } while (!isCorrect);
    }


    file.write(reinterpret_cast<char *> (&cars), count * sizeof(Cars));

    file.close();
}

auto output_cars(Cars *cars, size_t count) -> void {

    fstream file("cars.dat", ios::binary | ios::in);

    file.read(reinterpret_cast<char *> (&cars), count * sizeof(Cars));

    for (size_t i = 0; i < count; i++)
        cout << "Marka: " + cars[i].marka + " | Nomer: " + cars[i].nomer << endl;

    file.close();
}

auto search_cars(Cars *cars, size_t count) -> void {

    fstream file("cars.dat", ios::binary | ios::in);

    file.read(reinterpret_cast<char *> (&cars), count * sizeof(Cars));

    size_t counter(0);

    for (size_t i = 0; i < count; i++) {
        if (strstr(cars[i].nomer.c_str(), "B 57")) {
            cout << "Marka: " + cars[i].marka + " | Nomer: " + cars[i].nomer << endl;
        }
        else
            counter++;
    }

    if (counter == 0)
        cout << "There are no cars with number that starts with \"B 57\"";

    file.close();
}

auto change_car_number(Cars *cars, size_t count) -> void {

    fstream file("cars.dat", ios::binary | ios::in);

    file.read(reinterpret_cast<char *> (&cars), count * sizeof(Cars));
    file.close();

    file.open("cars.dat", ios::binary | ios::out);

    cin.ignore();

    size_t counter(0);
    string car_number;
    bool isCorrect(false);

    cout << "Enter car number to change: ";
    getline(cin, car_number);

    for (size_t i = 0; i < count; i++) {
        if (car_number == cars[i].nomer) {
            counter++;

            cout << "Current car number: " << cars[i].nomer << " | Car Brand: " << cars[i].marka << "\n\n";

            do {

                cout << "Enter the new car number: ";
                getline(cin, cars[i].nomer);

#if has_regex
                if (regex_match(cars[i].nomer, static_cast<regex> ("[A-Z]{1} [0-9]{4} [A-Z]{2}")))
                    for (size_t j = 0; j < count - 1; j++)
                        if (cars[j].nomer == cars[i].nomer && j != i)
                            cout << "\n\nThe car number must be 9 characters and UNIQUE!\n\n";
                        else
                            isCorrect = true;
#else
                if (friends[i].nomer.length() == 9) {
                    for (size_t j = 0; j < count; j++)
                        if (cars[j].nomer == cars[i].nomer && j != i)
                            isCorrect = true;
                        else
                            cout << "\n\nThe car number must be 9 characters and UNIQUE!\n\n";
                }
#endif

            } while (!isCorrect);
        }
    }

    if (counter == 0)
        cout << "There is no car with that number!";

    file.write(reinterpret_cast<char *> (&cars), count * sizeof(Cars));

    file.close();
}