MenuCPP

#include <iostream>
#include <stdio.h>
#include <string>
#include <cstddef>
#include <thread>
#include <chrono>

const size_t escapeKey = 27; // Escape key

#ifdef _WIN32 // Windows-specific code

#include <Windows.h>
#include <conio.h>

const size_t upArrow = 72; // Up arrow key (Windows)

const size_t downArrow = 80; // Down arrow key (Windows)

const size_t enterKey = 13; // Enter key (Windows)

void ClearScreen()
{
    std::system("cls");
}

HANDLE consoleHandle = GetStdHandle(STD_OUTPUT_HANDLE);

void FontSize(SHORT sizeOfTheFont)
{
    CONSOLE_FONT_INFOEX fontInfo{};

    fontInfo.cbSize = sizeof(fontInfo);

    if (!GetCurrentConsoleFontEx(consoleHandle, FALSE, &fontInfo))
    {
        // Handle error: unable to retrieve font info
        // You can print an error message or throw an exception

        return;
    }

    fontInfo.dwFontSize.X += sizeOfTheFont; // Increase the font width

    fontInfo.dwFontSize.Y += sizeOfTheFont; // Increase the font height

    if (!SetCurrentConsoleFontEx(consoleHandle, FALSE, &fontInfo))
    {
        // Handle error: unable to set font info
        // You can print an error message or throw an exception

        return;
    }
}

HWND consoleWindowHandle = GetConsoleWindow(); // Get the console window handle

void MaximizeWindow()
{
    ShowWindow(consoleWindowHandle, SW_MAXIMIZE); // Maximize the window
}

void ShowConsoleCursor(bool showFlag)
{
    CONSOLE_CURSOR_INFO cursorInfo;

    if (!GetConsoleCursorInfo(consoleHandle, &cursorInfo))
    {
        // Handle error: unable to retrieve cursor info
        // You can print an error message or throw an exception

        return;
    }

    cursorInfo.bVisible = showFlag; // Sets the cursor visibility

    if (!SetConsoleCursorInfo(consoleHandle, &cursorInfo))
    {
        // Handle error: unable to set cursor info
        // You can print an error message or throw an exception

        return;
    }
}

SHORT GetConsoleSizes()
{
    CONSOLE_SCREEN_BUFFER_INFO screenInfo;

    if (!GetConsoleScreenBufferInfo(consoleHandle, &screenInfo))
    {
        // Handle error: unable to retrieve font info
        // You can print an error message or throw an exception

        return false;
    }

    return screenInfo.dwSize.X;
}

int KeyboardInput()
{
    return _getch();;
}

#else // Unix/Linux/MacOS-specific code

#include <sys/ioctl.h>
#include <unistd.h>
#include <termios.h>
#include <X11/Xlib.h>

const size_t upArrow = 65; // Up arrow key (Linux/MacOS)

const size_t downArrow = 66; // Down arrow key (Linux/MacOS)

const size_t enterKey = 10; // Enter key (Linux/MacOS)

void ClearScreen()
{
    std::system("clear");
}

void FontSize(short sizeOfTheFont)
{
    struct winsize ws;

    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
    {
        // Handle error: unable to retrieve terminal size
        // You can print an error message or throw an exception

        return;
    }

    // Increase the font size by modifying the terminal size
    ws.ws_row += sizeOfTheFont; // Increase the number of rows

    ws.ws_col += sizeOfTheFont; // Increase the number of columns

    if (ioctl(STDOUT_FILENO, TIOCSWINSZ, &ws) == -1)
    {
        // Handle error: unable to set terminal size
        // You can print an error message or throw an exception

        return;
    }
}

void MaximizeWindow()
{
    struct winsize ws;

    ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws);

    std::cout << "\e[8;" << ws.ws_row << ";" << ws.ws_col << "t";  // Set terminal size
}

void ShowConsoleCursor(bool showFlag)
{
    std::cout << (showFlag ? "\033[?25h" : "\033[?25l"); // show/hide cursor

    std::cout.flush();
}

short GetConsoleSizes()
{
    struct winsize ws;

    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1)
    {
        // Handle error: unable to retrieve terminal size
        // You can print an error message or throw an exception

        std::exit(0);
    }

    return ws.ws_col;
}

int KeyboardInput()
{
    struct termios oldSettings, newSettings;

    // Get the current terminal settings
    tcgetattr(STDIN_FILENO, &oldSettings);

    // Copy the current settings to the new settings
    newSettings = oldSettings;

    // Disable canonical mode (line buffering) and input echo
    newSettings.c_lflag &= ~(ICANON | ECHO);

    // Apply the new terminal settings
    tcsetattr(STDIN_FILENO, TCSANOW, &newSettings);

    // Read a single character
    char character = getchar();

    // Restore the original terminal settings
    tcsetattr(STDIN_FILENO, TCSANOW, &oldSettings);

    return character;
}

#endif

template <typename T>

void MainMenu(T[], size_t, std::string[], size_t, std::string&, int);

void DisplayMenu(std::string[], size_t, std::string&, const size_t&);

template <typename T>

int MenuMovement(T[], int, size_t, int);

void GameStart(int);

void Controls(int);

void Credits(int);

void ExitGame(int);

bool IsKeyPressedToGoBackToThePreviousMenu(int);

template <typename T>

void DifficultyMenu(T[], size_t, std::string[], size_t, std::string&, int);

void CoutCentered(const std::string&);

int main()
{
    FontSize(6);

    MaximizeWindow();

    ShowConsoleCursor(false);

    typedef void(*menuOptions)(int);

    menuOptions mainMenuOptions[] = { GameStart, Controls, Credits, ExitGame };

    size_t sizeOfTheArray = sizeof(mainMenuOptions) / sizeof(mainMenuOptions[0]);

    std::string mainMenu[] = { "Start Game", "Controls", "Credits", "Exit" };

    size_t sizeOfTheStringMenu = std::size(mainMenu);

    std::string text = "Main Menu";

    MainMenu(mainMenuOptions, sizeOfTheArray, mainMenu, sizeOfTheStringMenu, text, 0);

    return 0;
}

template <typename T>

void MainMenu(T mainMenuOptions[], size_t sizeOfTheArray, std::string mainMenu[], size_t sizeOfTheStringMenu, std::string& text, int selectedOption)
{
    int key = 0;

    int previousSelectedOption = 0;

    while (true)
    {
        DisplayMenu(mainMenu, sizeOfTheStringMenu, text, selectedOption);

        previousSelectedOption = selectedOption;

        selectedOption = MenuMovement(mainMenuOptions, selectedOption, sizeOfTheArray, key);

        if (selectedOption < 0)
        {
            selectedOption = previousSelectedOption;
        }

        std::this_thread::sleep_for(std::chrono::milliseconds(12));
    }
}

void DisplayMenu(std::string mainMenu[], size_t sizeOfTheStringMenu, std::string& text, const size_t& selectedOption)
{
    ClearScreen();

    std::cout << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n";

    CoutCentered(text);

    std::cout << "\n" << "\n" << "\n";

    for (size_t i = 0; i < sizeOfTheStringMenu; i++)
    {
        selectedOption == i ? CoutCentered("--> " + mainMenu[i]) : CoutCentered("" + mainMenu[i]);

        if (i < sizeOfTheStringMenu - 1)
        {
            std::cout << "\n";
        }
    }
}

/*
This function is "int" and not "size_t", because the "size_t" data type doesn't return negative numbers,
it returns only numbers from 0 to 18 446 744 073 709 551 615 or 18_446_744_073_709_551_615 (the same number),
in other words, only positive, including 0
*/

template <typename T>

int MenuMovement(T menu[], int selectedOption, size_t sizeOfTheArray, int key)
{
    key = KeyboardInput();

    if (key == upArrow)
    {
        selectedOption--;

        if (selectedOption < 0)
        {
            selectedOption = sizeOfTheArray - 1;
        }
    }

    else if (key == downArrow)
    {
        selectedOption++;

        if (selectedOption >= sizeOfTheArray)
        {
            selectedOption = 0;
        }
    }

    else if (key == enterKey)
    {
        menu[selectedOption](selectedOption);
    }

    else if (key == escapeKey)
    {
        selectedOption = - 6;
    }

    return selectedOption;
}

void GameStart(int selectedOption)
{
    ClearScreen();

    std::cout << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n";

    typedef void(*difficultyOptions)(int);

    difficultyOptions difficultyMenuOptions[] = { GameStart, Credits, ExitGame };

    size_t sizeOfTheArray = sizeof(difficultyMenuOptions) / sizeof(difficultyMenuOptions[0]);

    std::string difficultyMenu[] = { "Start", "Cdits", "Eit" };

    size_t sizeOfTheStringMenu = std::size(difficultyMenu);

    std::string text = "Difficulty Menu";

    DifficultyMenu(difficultyMenuOptions, sizeOfTheArray, difficultyMenu, sizeOfTheStringMenu, text, selectedOption);
}

void Controls(int selectedOption)
{
    ClearScreen();

    std::cout << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n";

    CoutCentered("The controls are showed!");

    while (!IsKeyPressedToGoBackToThePreviousMenu(KeyboardInput()));
}

void Credits(int selectedOption)
{
    ClearScreen();

    std::cout << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n" << "\n";

    CoutCentered("The credits are showed!");

    while (!IsKeyPressedToGoBackToThePreviousMenu(KeyboardInput()));
}

void ExitGame(int selectedOption)
{
    std::exit(0);
}

bool IsKeyPressedToGoBackToThePreviousMenu(int key)
{
    if (key == escapeKey)
    {
        return true;
    }

    return false;
}

template <typename T>

void DifficultyMenu(T difficultyMenuOptions[], size_t sizeOfTheArray, std::string difficultyMenu[], size_t sizeOfTheStringMenu, std::string& text, int selectedOption)
{
    int key = 0;

    while (selectedOption != -6)
    {
        DisplayMenu(difficultyMenu, sizeOfTheStringMenu, text, selectedOption);

        selectedOption = MenuMovement(difficultyMenuOptions, selectedOption, sizeOfTheArray, key);

        std::this_thread::sleep_for(std::chrono::milliseconds(12));
    }
}

void CoutCentered(const std::string& text)
{
    size_t textWidth = text.length();

    short consoleWidth = GetConsoleSizes();

    size_t leftMargin = (consoleWidth - textWidth) / 2;

    std::cout.width(leftMargin + textWidth);

    std::cout << text;
}