added meme listener and /meme. fixes #151

Author: Zirak

master.js

@@ -5269,6 +5269,67 @@ bot.addCommand({
 
 })();
 
+;
+(function () {
+// #151: Listen for meme image names and reply with that meme.
+
+var urlBase = 'http://cdn.alltheragefaces.com/img/faces/png/',
+	extension = 'png';
+
+var memes = {
+	deskflip : 'angry-desk-flip',
+	no : 'angry-no',
+	notbad : 'obama-not-bad',
+	ohyou : 'happy-oh-stop-it-you',
+	okay : 'okay-okay-clean',
+	troll : 'troll-troll-face',
+	trollface : 'troll-troll-face',
+	youdontsay : 'misc-you-dont-say',
+};
+
+// ^(deskflip|no|notbad|...)\.(jpe?g|png)$
+var re = new RegExp(
+	'^(' +
+		Object.keys( memes ).map( RegExp.escape ).join( '|' ) +
+	')\\.(jpe?g|png)$' );
+
+IO.register( 'input', function meme ( msgObj ) {
+	var msg = msgObj.content.toLowerCase(),
+		parts = re.exec( msg );
+
+	if ( !parts ) {
+		return;
+	}
+
+	var reply = getMemeLink( parts[1] );
+
+	bot.adapter.out.add(
+		bot.adapter.directreply( msgObj.message_id ) + ' ' +
+			reply, msgObj.room_id );
+});
+
+bot.addCommand({
+	name : 'meme',
+	fun : function ( args ) {
+		if ( !memes[args] ) {
+			return 'Sorry, I don\'t know that one.';
+		}
+		//TODO: list possible memes (reply with Object.keys(meme))
+
+		args.directreply( getMemeLink(args) );
+	},
+	permissions : { del : 'NONE' },
+	description : 'Return a simple meme link. `/meme memeName`'
+});
+
+function getMemeLink ( meme ) {
+	return urlBase + memes[ meme ] + '.' + extension;
+}
+
+})();
+
+;
+
 ;
 (function () {
 "use strict";