* New validation methods

core/system_view_validate.js

@@ -0,0 +1,56 @@
+var user				= require('./user.js');
+var Config				= require('./config.js').config;
+
+
+exports.validateUserNameAvail 	= validateUserNameAvail;
+exports.validateEmailAvail		= validateEmailAvail;
+exports.validateBirthdate		= validateBirthdate;
+exports.validatePasswordSpec	= validatePasswordSpec;
+
+function validateUserNameAvail(data, cb) {
+	if(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'));
+	} else {
+		var usernameRegExp	= new RegExp(Config.users.usernamePattern);
+		var invalidNames	= Config.users.newUserNames + Config.users.badUserNames;
+
+		if(!usernameRegExp.test(data)) {
+			cb(new Error('Username contains invalid characters'));
+		} else if(invalidNames.indexOf(data.toLowerCase()) > -1) {
+			cb(new Error('Username is blacklisted'));
+		} 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'));
+				} else {
+					cb(null);
+				}
+			});
+		}
+	}
+}
+
+function validateEmailAvail(data, cb) {
+	user.getUserIdsWithProperty('email_address', data, function userIdsWithEmail(err, uids) {
+		if(err) {
+			cb(new Error('Internal system error'));
+		} else if(uids.length > 0) {
+			cb(new Error('Email address not unique'));
+		} else {
+			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);
+}
+
+function validatePasswordSpec(data, cb) {
+	cb((!data || data.length < Config.users.passwordMin) ? new Error('Password too short') : null);
+}