Codecademy export

main.js

const prompt = require('prompt-sync')({sigint: true});

const hat = '^';
const hole = 'O';
const fieldCharacter = '░';
const pathCharacter = '*';

//center class
class Field {
  constructor(field) {
    this._field = field;
  }
  print() {
    for(let i=0; i< this._field.length; i++) {
      console.log(this._field[i].join(''));
    }
  }
  getField() {
    return this._field;
  }
  setField(posX, posY, target) {
    this._field[posX][posY] = target;
  }
  static generateField(height, width, percentage) {
    if(percentage > 25) percentage = 25;
    let holeCount = Math.floor(height*width*percentage/100);
    let hatCount = 1;

    let matrix = new Array(height); //initialize matrix
    for(let i=0; i< height; i++) {
      matrix[i] = new Array(width);
      for(let j=0; j< width; j++) {
        matrix[i][j] = fieldCharacter;
      }
    }
    matrix[0][0] = pathCharacter;

    while(holeCount > 0) {
      let a = Math.floor(Math.random()*(height));
      let b = Math.floor(Math.random()*(width));
      if(hatCount === 1 && matrix[a][b] != pathCharacter) {
        matrix[a][b] = hat;
        hatCount--;
      }
      if(matrix[a][b] === fieldCharacter && matrix[a][b] != hat) {
        matrix[a][b] = hole;
        holeCount--;
      }
    }
    return matrix;
  }
}

let h = prompt('height > ');
let w = prompt('width > ');
let p = prompt('percentage > ');
const field = new Field(Field.generateField(h,w,p)); //generate field instance

//working
let run = true;
let posX = 0;
let posY = 0;

while(run) {
  field.print();
  let direction = prompt('Choose direction! W:UP A:LEFT S:DOWN D:RIGHT > ');
  switch(direction) {
    case 'w': { //up
      posX--;
      break;
    }
    case 'a': { //left
      posY--;
      break;
    }
    case 's': { //down
      posX++;
      break;
    }
    case 'd': { //right
      posY++;
      break;
    }
  }
  if(field.getField()[posX][posY] === hat) {
    console.log('you won');
    run = false;
   } else if(field.getField()[posX][posY] === hole || posX >= h || posY >= w || posX < 0 || posY < 0) {
    console.log('you lose');
    run = false;
   } else {
    field.setField(posX, posY, pathCharacter);
   }
}