Snake Ladder Game

SnakeLadder.js

class Dice {
    roll() {
        return Math.floor(Math.random() * 6) + 1;
    }
}

class Board {
    constructor(size, snakes, ladders) {
        this.size = size;
        this.snakes = new Map(snakes);   // {start: end}
        this.ladders = new Map(ladders); // {start: end}
    }

    getNewPosition(position) {
        if (this.snakes.has(position)) {
            console.log(`Oops! Snake at ${position}, sliding down to ${this.snakes.get(position)}`);
            return this.snakes.get(position);
        }
        if (this.ladders.has(position)) {
            console.log(`Yay! Ladder at ${position}, climbing up to ${this.ladders.get(position)}`);
            return this.ladders.get(position);
        }
        return position;
    }

    isWinningPosition(position) {
        return position === this.size;
    }
}

class Player {
    constructor(name) {
        this.name = name;
        this.position = 1;
    }

    move(steps, board) {
        let newPosition = this.position + steps;

        if (newPosition > board.size) {
            console.log(`${this.name} rolled ${steps}, but can't move beyond ${board.size}.`);
            return;
        }

        console.log(`${this.name} rolled a ${steps} and moved from ${this.position} to ${newPosition}`);
        this.position = board.getNewPosition(newPosition);
    }
}

class SnakeLadderGame {
    constructor(players, boardSize, snakes, ladders) {
        this.players = players.map(name => new Player(name));
        this.board = new Board(boardSize, snakes, ladders);
        this.dice = new Dice();
        this.winner = null;
    }

    playTurn(player) {
        const diceRoll = this.dice.roll();
        player.move(diceRoll, this.board);

        if (this.board.isWinningPosition(player.position)) {
            console.log(`🎉 ${player.name} wins the game! 🎉`);
            this.winner = player;
        }
    }

    start() {
        console.log("🎲 Starting Snake and Ladder Game! 🎲");
        let turn = 0;

        while (!this.winner) {
            this.playTurn(this.players[turn % this.players.length]);
            turn++;
        }
    }
}

// Example Game
const snakes = [[14, 7], [31, 19], [37, 3], [46, 23], [62, 18], [74, 53], [87, 36], [94, 71], [98, 79]];
const ladders = [[4, 14], [9, 31], [20, 38], [28, 84], [40, 59], [51, 67], [63, 81], [71, 91]];
const players = ["Alice", "Bob"];

const game = new SnakeLadderGame(players, 100, snakes, ladders);
game.start();