* Don't allow pure numbers as usernames (e.g. "1234")

* Minor code cleanup

core/system_view_validate.js

@@ -1,5 +1,9 @@
-var user				= require('./user.js');
+/* jslint node: true */
-var Config				= require('./config.js').config;
+'use strict';
+
+//	ENiGMA½
+const user		= require('./user.js');
+const Config	= require('./config.js').config;
 
 exports.validateNonEmpty		= validateNonEmpty;
 exports.validateMessageSubject	= validateMessageSubject;
@@ -10,34 +14,36 @@ exports.validateBirthdate		= validateBirthdate;
 exports.validatePasswordSpec	= validatePasswordSpec;
 
 function validateNonEmpty(data, cb) {
-	cb(data && data.length > 0 ? null : new Error('Field cannot be empty'));
+	return cb(data && data.length > 0 ? null : new Error('Field cannot be empty'));
 }
 
 function validateMessageSubject(data, cb) {
-	cb(data && data.length > 1 ? null : new Error('Subject too short'));
+	return cb(data && data.length > 1 ? null : new Error('Subject too short'));
 }
 
 function validateUserNameAvail(data, cb) {
-	if(data.length < Config.users.usernameMin) {
+	if(!data || data.length < Config.users.usernameMin) {
 		cb(new Error('Username too short'));
 	} else if(data.length > Config.users.usernameMax) {
 		//	generally should be unreached due to view restraints
-		cb(new Error('Username too long'));
+		return cb(new Error('Username too long'));
 	} else {
-		var usernameRegExp	= new RegExp(Config.users.usernamePattern);
+		const usernameRegExp	= new RegExp(Config.users.usernamePattern);
-		var invalidNames	= Config.users.newUserNames + Config.users.badUserNames;
+		const invalidNames		= Config.users.newUserNames + Config.users.badUserNames;
 
 		if(!usernameRegExp.test(data)) {
-			cb(new Error('Username contains invalid characters'));
+			return cb(new Error('Username contains invalid characters'));
 		} else if(invalidNames.indexOf(data.toLowerCase()) > -1) {
-			cb(new Error('Username is blacklisted'));
+			return cb(new Error('Username is blacklisted'));
+		} else if(/^[0-9]+$/.test(data)) {
+			return cb(new Error('Username cannot be a number'));
 		} else {
 			user.getUserIdAndName(data, function userIdAndName(err) {
 				if(!err) {	//	err is null if we succeeded -- meaning this user exists already
-					cb(new Error('Userame unavailable'));
+					return cb(new Error('Userame unavailable'));
-				} else {
-					cb(null);
 				}
+				
+				return cb(null);
 			});
 		}
 	}
@@ -69,28 +75,28 @@ function validateEmailAvail(data, cb) {
 	//
 	//	See http://stackoverflow.com/questions/7786058/find-the-regex-used-by-html5-forms-for-validation
 	//
-	var emailRegExp = /[a-z0-9!#$%&'*+\/=?^_`{|}~.-]+@[a-z0-9-]+(.[a-z0-9-]+)*/;
+	const emailRegExp = /[a-z0-9!#$%&'*+\/=?^_`{|}~.-]+@[a-z0-9-]+(.[a-z0-9-]+)*/;
 	if(!emailRegExp.test(data)) {
 		return cb(new Error('Invalid email address'));
 	}
 
 	user.getUserIdsWithProperty('email_address', data, function userIdsWithEmail(err, uids) {
 		if(err) {
-			cb(new Error('Internal system error'));
+			return cb(new Error('Internal system error'));
 		} else if(uids.length > 0) {
-			cb(new Error('Email address not unique'));
+			return cb(new Error('Email address not unique'));
-		} else {
-			cb(null);
 		}
+		
+		return cb(null);		
 	});
 }
 
 
 function validateBirthdate(data, cb) {
 	//	:TODO: check for dates in the future, or > reasonable values
-	cb(isNaN(Date.parse(data)) ? new Error('Invalid birthdate') : null);
+	return cb(isNaN(Date.parse(data)) ? new Error('Invalid birthdate') : null);
 }
 
 function validatePasswordSpec(data, cb) {
-	cb((!data || data.length < Config.users.passwordMin) ? new Error('Password too short') : null);
+	return cb((!data || data.length < Config.users.passwordMin) ? new Error('Password too short') : null);
 }