Improved headless mode (cookies, config, REPL)

* Stores cookies so you won't waste time on auth
* Put the base site and chat as config
* After all's well and done, you get a REPL with the bot's page

Author: Zirak

run-headless.js

@@ -1,10 +1,17 @@
-var Nightmare = require('nightmare');
-var hound = new Nightmare();
+var Nightmare = require('nightmare'),
+	readline = require('readline');
+
+var hound = new Nightmare({
+	cookiesFile: 'cookies.jar'
+});
 
 /***********	Change me!	  ***********/
 var config = {
 	email:	  'you can guess',
-	password: 'what these are'
+	password: 'what these are',
+
+	siteUrl: 'https://stackoverflow.com',
+	roomUrl: 'https://chat.stackoverflow.com/rooms/1'
 };
 
 function once (fn) {
@@ -19,40 +26,106 @@ function once (fn) {
 	};
 }
 
+hound.drainQueue = function (cb) {
+	var self = hound;
+
+	setTimeout(next, 0);
+	function next(err) {
+		var item = self.queue.shift();
+		if (!item) {
+			cb && cb(err, self);
+			return;
+		}
+
+		var method = item[0],
+			args = item[1];
+		args.push(once(next));
+		method.apply(self, args);
+	}
+};
+
+function seLogin () {
+	hound
+		.type('#se-login input[type="email"]', config.email)
+		.type('#se-login input[type="password"]', config.password)
+		.click('#se-login input[type="button"]')
+		.wait()
+		.screenshot('pics/login.png');
+}
+function injectToChat (hound) {
+	hound
+		.goto(config.roomUrl)
+		.wait()
+		.screenshot('pics/chat.png')
+		.evaluate(function () {
+			var script = document.createElement('script');
+			script.src = 'https://raw.github.com/Zirak/SO-ChatBot/master/master.js';
+			script.onload = function() {
+				bot.activateDevMode();
+				console.log('Loaded bot');
+				bot.adapter.out.add('I will derive!');
+			};
+			document.head.appendChild(script);
+		}, function () {
+			console.log('Injected chatbot.');
+		});
+}
+
 hound
-	.goto('https://stackoverflow.com/users/login/')
+	.goto(config.siteUrl + '/users/login/')
 	.screenshot('pics/pre-login.png')
-	.type('#se-login input[type="email"]', config.email)
-	.type('#se-login input[type="password"]', config.password)
-	.click('#se-login input[type="button"]')
-	.wait()
-	.screenshot('pics/login.png')
-	.goto('https://chat.stackoverflow.com/rooms/76070')
-	.screenshot('pics/chat.png')
-	.evaluate(function () {
-		var script = document.createElement('script');
-		script.src = 'https://raw.github.com/Zirak/SO-ChatBot/master/master.js';
-		script.onload = function() {
-			console.log('Loaded bot');
-		};
-		document.head.appendChild(script);
-	}, function () {
-		console.log('Injected chatbot.');
+	.wait(1000)
+	.url(function (url) {
+		if (!/login-add$/.test(url)) {
+			console.log('Need to authenticate');
+			hound.use(seLogin);
+		}
+		else {
+			console.log('Cool, already logged in');
+		}
+
+		hound.use(injectToChat);
+		hound.drainQueue(function () {
+			console.log('Should be done loading stuff.');
+			hitTheRepl();
+		});
 	})
 	.setup(function () {
-		var self = hound;
-
-		setTimeout(next, 0);
-		function next(err) {
-			var item = self.queue.shift();
-			if (!item) {
-				console.log('Should be done loading stuff.');
-				return;
-			}
+		hound.drainQueue();
+	});
 
-			var method = item[0],
-				args = item[1];
-			args.push(once(next));
-			method.apply(self, args);
-		}
+function hitTheRepl() {
+	var repl = readline.createInterface({
+		input: process.stdin,
+		output: process.stdout
 	});
+
+	console.log('You are now in a REPL with the remote page. Have fun!');
+
+	hound.on('consoleMessage', function (msg) {
+		console.log('<', msg);
+	});
+	hound.on('error', function (msg) {
+		console.log('! ', msg);
+	});
+
+	repl.on('line', function (data) {
+		hound.evaluate(function (code) {
+			try {
+				return eval(code);
+			}
+			catch (e) {
+				return e.message;
+			}
+		}, function (res) {
+			console.log('$', res);
+			repl.prompt();
+		}, data).drainQueue();
+	});
+	repl.on('close', function () {
+		console.log('Leaving the nightmare...');
+		hound.teardownInstance();
+	});
+
+	repl.prompt();
+}