Rework email validation to use isemail

Drop hand-crafted RegExp in favour of a 3rd-party module that supports
RFC5321, RFC5322 and other relevant standards.

common/models/user.js

@@ -9,6 +9,7 @@
 
 var g = require('strong-globalize')();
 
+var isEmail = require('isemail');
 var loopback = require('../../lib/loopback');
 var utils = require('../../lib/utils');
 var path = require('path');
@@ -752,10 +753,9 @@ module.exports = function(User) {
     assert(loopback.AccessToken, 'AccessToken model must be defined before User model');
     UserModel.accessToken = loopback.AccessToken;
 
-    // email validation regex
-    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
-
-    UserModel.validatesFormatOf('email', { with: re, message: g.f('Must provide a valid email') });
+    UserModel.validate('email', emailValidator, {
+      message: g.f('Must provide a valid email'),
+    });
 
     // FIXME: We need to add support for uniqueness of composite keys in juggler
     if (!(UserModel.settings.realmRequired || UserModel.settings.realmDelimiter)) {
@@ -772,3 +772,14 @@ module.exports = function(User) {
 
   User.setup();
 };
+
+function emailValidator(err, done) {
+  var value = this.email;
+  if (value == null)
+    return;
+  if (typeof value !== 'string')
+    return err('string');
+  if (value === '') return;
+  if (!isEmail(value))
+    return err('email');
+}

package.json

@@ -48,6 +48,7 @@
     "inflection": "^1.6.0",
     "loopback-connector-remote": "^2.0.0-alpha.1",
     "loopback-datasource-juggler": "^3.0.0-alpha.7",
+    "isemail": "^1.2.0",
     "loopback-phase": "^1.2.0",
     "nodemailer": "^2.5.0",
     "nodemailer-stub-transport": "^1.0.0",

test/user.test.js

@@ -120,10 +120,7 @@ describe('User', function() {
         assert.equal(err.name, 'ValidationError');
         assert.equal(err.statusCode, 422);
         assert.equal(err.details.context, User.modelName);
-        assert.deepEqual(err.details.codes.email, [
-          'presence',
-          'format.null',
-        ]);
+        assert.deepEqual(err.details.codes.email, ['presence']);
 
         done();
       });
@@ -143,11 +140,21 @@ describe('User', function() {
     it('Requires a valid email', function(done) {
       User.create({ email: 'foo@', password: '123' }, function(err) {
         assert(err);
-
+        assert.equal(err.name, 'ValidationError');
+        assert.equal(err.statusCode, 422);
+        assert.equal(err.details.context, User.modelName);
+        assert.deepEqual(err.details.codes.email, ['custom.email']);
         done();
       });
     });
 
+    it('allows TLD domains in email', function() {
+      return User.create({
+        email: 'local@com',
+        password: '123',
+      });
+    });
+
     it('Requires a unique email', function(done) {
       User.create({ email: 'a@b.com', password: 'foobar' }, function() {
         User.create({ email: 'a@b.com', password: 'batbaz' }, function(err) {