RSS reader with in NodeJS example

Readline module is used to read and write data in console. Full docs on Readline module in NodeJS
In this example the list of RSS channels from Yandex.news
To call the script you should use type: node --harmony cmd.js

	/*
	Readline module is used to read and write data in console.
	Full docs on Readline - https: //nodejs.org/api/readline.html
	In this example the list of RSS channes from Yandex.news - https: //news.yandex.ru/export.html
	To call the script you should use type: 'node --harmony cmd.js'
	*/
	// Adding needed modules:
	// readline - reads console ine
	// request - does http resquests
	// parser - parses the responses
	const readline = require('readline');
	const r = require('request');
	const parser = require('/usr/local/lib/node_modules/xml2json/');
	// Script variables:
	// currentState - flag showing what news type to show
	// items - list of news in the RSS
	// rsss - list of RSS litst
	var currentState = 'general';
	var items = [];
	const rsss = [{
	'title': 'Hardware',
	'url': 'https://news.yandex.ru/hardware.rss'
	}, {
	'title': 'Science',
	'url': 'https://news.yandex.ru/science.rss'
	}, {
	'title': 'Finances',
	'url': 'https://news.yandex.ru/finances.rss'
	}, {
	'title': 'Society',
	'url': 'https://news.yandex.ru/society.rss'
	}, {
	'title': 'Internet',
	'url': 'https://news.yandex.ru/internet.rss'
	}, {
	'title': 'Netherlands',
	'url': 'https://news.yandex.ru/Netherlands/index.rss'
	}, {
	'title': 'Football',
	'url': 'https://news.yandex.ru/football.rss'
	}, {
	'title': 'Law',
	'url': 'https://news.yandex.ru/law.rss'
	}];
	//init Readline interface
	const rl = readline.createInterface({
	input: process.stdin,
	output: process.stdout
	});
	//Below there are several handlers
	// - loadChannel, channelAnswers, generalAnswers, loadGeneral
	// their names should be pretty self-explanatory
	var loadChannel = function(e) {
	currentState = 'channel';
	var ch = JSON.parse(e).rss;
	items = ch.channel.item;
	console.log('|| ', ch.channel.title);
	items.forEach((x, i) => {
	console.log((i + 1) + ' - ' + x.title);
	});
	console.log('>> Select item to read (0 - for level up)');
	}
	var channelAnswers = function(answer) {
	if (!items[answer]) {
	console.log('Wrong item number');
	} else {
	console.log('|| ', items[(answer - 1)].title);
	console.log(items[(answer - 1)].description);
	console.log('>> Enter next command...');
	}
	}
	var generalAnswers = function(answer) {
	if (!rsss[answer]) {
	console.log('Wrong channel number');
	}
	r(rsss[(answer - 1)].url, function(error, response, body) {
	if (!error && response.statusCode == 200) {
	loadChannel(parser.toJson(body));
	}
	})
	}
	var loadGeneral = function() {
	console.log('Please select channel to read out of ' + rsss.length + '\n');
	rsss.forEach((x, i) => {
	console.log((i + 1) + ' - ' + x.title);
	});
	currentState = 'general';
	console.log('>> Enter id from 1 to ' + rsss.length + ':');
	}
	//Main Readline event handler
	rl.on('line', (answer) => {
	if (answer == 0) {
	loadGeneral();
	return;
	}
	//quit it user presses 'x' or 'q'
	if (answer == 'x' || answer == 'q') {
	console.log('Bye!');
	process.exit(0);
	}
	(currentState == 'general') ? generalAnswers(answer): channelAnswers(answer);
	});
	/*
	This is relatively simple example.You can extend this one or use one of the advanced modules working with cli in NodeJS.
	For example this: https: //github.com/chriso/cli
	*/
	//JS module syntax - default function to call when module file in called
	module.exports.default = loadGeneral();

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