hangman.js

'use strict';

function Hangman(word) {
	this.word = word.trim();
	this.wordLow = this.word.toLowerCase();
	this.myTry = [...(this.word.replace(/\w/g, '_'))];
	this.trys = 6;
	this.letters = [];
	this.won = false;
	this.lost = false;
}

Hangman.prototype.console = function() {
	console.log(
		`${this.myTry.join('')} | ${this.letters.join('')} | left: ${this.trys}`
	)
};

Hangman.prototype.isWon = function() {
	if (this.won) {
		console.log(`You have already won! The word was ${this.word}`)
		return true;
	}
};

Hangman.prototype.isLost = function() {
	if (this.lost) {
		console.log(`You have already lost! The word was ${this.word}`)
		return true;
	}
};

Hangman.prototype.winer = function() {
	this.won = true;
	console.log(`You won! The word was ${this.word}`)
};
Hangman.prototype.looser = function() {
	this.lost = true;
	console.log(`You lost. :( The word was ${this.word}`)
};

Hangman.prototype.guess = function(char) {

	if ( this.isWon() || this.isLost() || char==" ") {
		return
	}

	char = char.toLowerCase();

	if ( this.letters.indexOf(char) != -1 || this.myTry.indexOf(char) != -1){
		console.log('You have already entered this letter')
		return this
	} 

	let idx = this.wordLow.indexOf(char); 

	if (idx == -1) {
		this.letters.push(char);
		this.trys--;
		if (this.trys < 0){
			this.looser();
			return;
		}
		this.console();
		return;
	}

	while (idx !== -1) {
		this.myTry[idx] = this.word[idx];
	  idx = this.wordLow.indexOf(char, idx + 1);
	}
	if (this.myTry.join('')==this.word){
    this.winer()
    return
  } 
	this.console();
};

const fr = new Hangman('Frontend Raccoon');


/*
 * We need to create a readline interface.
 * The interface takes 2 streams.
 * The input field points to the readable input stream
 * and the output field to the writable output stream. 
 */

const readline = require('readline');
 
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

function nodeJs() {
	rl.question('\nPlease write your letter: ', function (name) {
		if (name){
			fr.guess(name);
			nodeJs();
		} else {
			rl.question('\nFor exit type "y" ', function (ans) {
				if (ans =="y"){
		      console.log('goodbay');
		      rl.close();
		      process.stdin.destroy();
				} else {
					nodeJs();
				}
			})
		}
	});
}

nodeJs();