Add support for lists of words to be banned from being used in userna…

…mes (NOT chat).

& and higher can change the list with /banword and /unbanword (or /bw and /ubw respectively). The words/phrases are turned into IDs (only lowercase alphanumeric characters allowed) and checked against the ID form of a given username.

Keep in mind the list has no sense of context, and so overzealous banning, particularly of short or otherwise common words, should be avoided. Or else user "Cofagrigus" will want to have a word with you.

.gitignore

@@ -3,6 +3,7 @@
 /logs/*
 /node_modules
 npm-debug.log
+/config/bannedwords.txt
 
 # boilerplate #
 ###############

chat-commands.js

@@ -1029,6 +1029,36 @@ function parseCommandLocal(user, cmd, target, room, socket, message) {
 		});
 		return false;
 		break;
+	case 'banword':
+	case 'bw':
+		if (!user.can('announce')) {
+			socket.emit('console', '/banword - Access denied.');
+			return false;
+		}
+		target = toId(target);
+		if (!target) {
+			socket.emit('console', 'Specify a word or phrase to ban.');
+			return false;
+		}
+		Users.addBannedWord(target);
+		socket.emit('console', 'Added \"'+target+'\" to the list of banned words.');
+		return false;
+		break;
+	case 'unbanword':
+	case 'ubw':
+		if (!user.can('announce')) {
+			socket.emit('console', '/unbanword - Access denied.');
+			return false;
+		}
+		target = toId(target);
+		if (!target) {
+			socket.emit('console', 'Specify a word or phrase to unban.');
+			return false;
+		}
+		Users.removeBannedWord(target);
+		socket.emit('console', 'Removed \"'+target+'\" from the list of banned words.');
+		return false;
+		break;
 	case 'help':
 	case 'commands':
 	case 'h':

users.js

@@ -96,6 +96,31 @@ function exportUsergroups() {
 }
 importUsergroups();
 
+var bannedWords = {};
+function importBannedWords() {
+	fs.readFile('config/bannedwords.txt', function(err, data) {
+		if (err) return;
+		data = (''+data).split("\n");
+		bannedWords = {};
+		for (var i = 0; i < data.length; i++) {
+			if (!data[i]) continue;
+			bannedWords[data[i]] = true;
+		}
+	});
+}
+function exportBannedWords() {
+	fs.writeFile('config/bannedwords.txt', Object.keys(bannedWords).join('\n'));
+}
+function addBannedWord(word) {
+	bannedWords[word] = true;
+	exportBannedWords();
+}
+function removeBannedWord(word) {
+	delete bannedWords[word];
+	exportBannedWords();
+}
+importBannedWords();
+
 // User
 var User = (function () {
 	function User(name, person, token) {
@@ -332,8 +357,16 @@ var User = (function () {
 			// before it gets to this stage it's your own fault
 			this.emit('nameTaken', {userid: '', reason: "You did not specify a name."});
 			return false;
-		} else if (userid === this.userid && !auth) {
-			return this.forceRename(name, this.authenticated);
+		} else {
+			for (var w in bannedWords) {
+				if (userid.indexOf(w) >= 0) {
+					this.emit('nameTaken', {userid: '', reason: "That name contains a banned word or phrase."});
+					return false;
+				}
+			}
+			if (userid === this.userid && !auth) {
+				return this.forceRename(name, this.authenticated);
+			}
 		}
 		if (users[userid] && !users[userid].authenticated && users[userid].connected && !auth) {
 			this.emit('nameTaken', {userid:this.userid, token:token, reason: "Someone is already using the name \""+users[userid].name+"\"."});
@@ -899,3 +932,6 @@ exports.connectUser = connectUser;
 exports.users = users;
 exports.prevUsers = prevUsers;
 exports.importUsergroups = importUsergroups;
+exports.addBannedWord = addBannedWord;
+exports.removeBannedWord = removeBannedWord;
+