Mednafen Console GUI

mednafen-console-gui.js

const fs = require("fs");
const path = require ("path");
const readline = require('readline');
const { spawn } = require('child_process');

let ROMS_FOLDER = "C:/Users/.../PSX";
let MEDNAFEN_HOME = "C:/Users/.../Mednafen";

// Initialize the line reader
const rl = readline.createInterface({
	input: process.stdin,
	output: process.stdout
});

const cueList = fromDir(ROMS_FOLDER, '.cue');


function fromDir(startPath,filter){
	
	let result = [];

	if (!fs.existsSync(startPath)){
		console.log("No dir ", startPath);
		return [];
	}

	let files = fs.readdirSync(startPath);
	for(let i=0;i<files.length;i++){
		let filename = path.join(startPath, files[i]);
		let stat = fs.lstatSync(filename);
		if (stat.isDirectory()){
			fromDir(filename,filter);
		}
		else if (filename.indexOf(filter)>=0) {
			result.push(files[i]);
		}
	}
	return result;
}

function showMenu(){
	let extensionRegex = new RegExp(/\.cue$/);

	// Print the menu
	for(let i=0; i<cueList.length; i++){	
		let menuItem = `(${i}) ${cueList[i]}`.replace(extensionRegex, "");	
		console.log(menuItem);
	}
}

function startMednafen(fullRomPath){
	
	const ls = spawn(`${MEDNAFEN_HOME}/mednafen.exe`, [fullRomPath]);

	ls.stdout.on('data', (data) => {
		console.log(`stdout: ${data}`);
	});

	ls.stderr.on('data', (data) => {
		console.log(`stderr: ${data}`);
	});

	ls.on('close', (code) => {
		console.log(`child process exited with code ${code}`);
		showMenu();
		chooseGame();
	});
}

function chooseGame(){
	
	function error(){		
		console.log("Error");
		chooseGame();
	}

	// Ask which game to play
	rl.question("Choose → ", (answer) => {
		
		if(typeof answer === "undefined") return error();
		
		answer = answer.trim();
		
		if(answer.length === 0) return error();
		
		answer = Number(answer);
		
		if(typeof cueList[answer] === "undefined") return error();

		let fullRomPath = ROMS_FOLDER + "/" + cueList[answer];
		startMednafen(fullRomPath);		
		
	});
	
}


showMenu();
chooseGame();