Game

/**
 *  Ini main Class "World of Zuul"
 *  "World of Zuul" sangat simpel, game adventure berbasis text.  User
 *  bisa berjalan di sekitar pemandangan. Itu saja. Ini benar-benar harus
 *  diperpanjang agar lebih menarik!
 *
 *  Untuk bermain, buat instance dari class ini dan panggil method "play"
 *
 *  Main class ini membuat dan menginisialisasi all the others: Class ini
 *  membuat semua rooms, membuat parser dan memulai game.
 *  Ini juga mengevaluasi dan menjalankan perintah yang dikembalikan
 *  dari parser.
 *
 * @author  thomasdwi.a
 * @version 20201115
 */

public class Game
{
    private Parser parser;
    private Room currentRoom;

    /**
     * Membuat game dan menginisialisasi map internal.
     */
    public Game()
    {
        createRooms();
        parser = new Parser();
    }

    /**
     * Membuat semua room dan menghubungkan pintu keluar mereka.
     */
    private void createRooms()
    {
        Room outside, theater, pub, lab, office;

        // Membuat semua room
        outside = new Room("outside the main entrance of the university");
        theater = new Room("in a lecture theater");
        pub = new Room("in the campus pub");
        lab = new Room("in a computing lab");
        office = new Room("in the computing admin office");

        // inisialisasi jalan keluar dari room
        outside.setExits(null, theater, lab, pub);
        theater.setExits(null, null, null, outside);
        pub.setExits(null, outside, null, null);
        lab.setExits(outside, office, null, null);
        office.setExits(null, null, null, lab);

        currentRoom = outside;  // memulai game dari luar(outside)
    }

    /**
     *  Main play routine. Berulang hingga selesai permainan.
     */
    public void play()
    {
        printWelcome();

        // masuk ke main command loop.  Disini kita  berulang kali membaca perintah dan
        // menjalankannya sampai permainan selesai.

        boolean finished = false;
        while (! finished) {
            Command command = parser.getCommand();
            finished = processCommand(command);
        }
        System.out.println("Thank you for playing.  Good bye.");
    }

    /**
     * Mencetak pesan selamat datang untuk pemain.
     */
    private void printWelcome()
    {
        System.out.println();
        System.out.println("Welcome to the World of Zuul!");
        System.out.println("World of Zuul is a new, incredibly boring adventure game.");
        System.out.println("Type 'help' if you need help.");
        System.out.println();
        System.out.println("You are " + currentRoom.getDescription());
        System.out.print("Exits: ");
        if(currentRoom.northExit != null) {
            System.out.print("north ");
        }
        if(currentRoom.eastExit != null) {
            System.out.print("east ");
        }
        if(currentRoom.southExit != null) {
            System.out.print("south ");
        }
        if(currentRoom.westExit != null) {
            System.out.print("west ");
        }
        System.out.println();
    }

    /**
     * Diberikan perintah, proses (yaitu: menjalankan) perintah.
     * @param command sebagai Perintah yang akan diproses.
     * @return true Jika perintah menyelesaikan game, false jika tidak.
     */
    private boolean processCommand(Command command)
    {
        boolean wantToQuit = false;

        if(command.isUnknown()) {
            System.out.println("I don't know what you mean...");
            return false;
        }

        String commandWord = command.getCommandWord();
        if (commandWord.equals("help")) {
            printHelp();
        }
        else if (commandWord.equals("go")) {
            goRoom(command);
        }
        else if (commandWord.equals("quit")) {
            wantToQuit = quit(command);
        }

        return wantToQuit;
    }

    // Implementasi dari perintah pemain:

    /**
     * mencetak informasi help.
     * Di sini kami mencetak beberapa pesan bodoh dan tersembunyi serta
     * daftar kata command
     */
    private void printHelp()
    {
        System.out.println("You are lost. You are alone. You wander");
        System.out.println("around at the university.");
        System.out.println();
        System.out.println("Your command words are:");
        System.out.println("   go quit help");
    }

    /**
     * Cobalah untuk pergi ke satu arah. Jika ada jalan keluar,
     * masuk ke room baru, jika tidak cetak pesan error.
     */
    private void goRoom(Command command)
    {
        if(!command.hasSecondWord()) {
            // jika tidak ada second word, kita tidak kemana-mana...
            System.out.println("Go where?");
            return;
        }

        String direction = command.getSecondWord();

        // Coba meninggalkan room sekarang.
        Room nextRoom = null;
        if(direction.equals("north")) {
            nextRoom = currentRoom.northExit;
        }
        if(direction.equals("east")) {
            nextRoom = currentRoom.eastExit;
        }
        if(direction.equals("south")) {
            nextRoom = currentRoom.southExit;
        }
        if(direction.equals("west")) {
            nextRoom = currentRoom.westExit;
        }

        if (nextRoom == null) {
            System.out.println("There is no door!");
        }
        else {
            currentRoom = nextRoom;
            System.out.println("You are " + currentRoom.getDescription());
            System.out.print("Exits: ");
            if(currentRoom.northExit != null) {
                System.out.print("north ");
            }
            if(currentRoom.eastExit != null) {
                System.out.print("east ");
            }
            if(currentRoom.southExit != null) {
                System.out.print("south ");
            }
            if(currentRoom.westExit != null) {
                System.out.print("west ");
            }
            System.out.println();
        }
    }

    /**
     * "Quit" dimasukkan. Cek sisa command untuk melihat
     * apakah kita benar-benar keluar dari permainan.
     * @return true, jika perintah ini untuk keluar dari game, false jika tidak.
     */
    private boolean quit(Command command)
    {
        if(command.hasSecondWord()) {
            System.out.println("Quit what?");
            return false;
        }
        else {
            return true;  // sinyal bahwa kita mau quit
        }
    }
}