simplify isEmail()

close GH-9

lib/field.js

@@ -212,7 +212,6 @@ Field.prototype.customFilter = function (func) {
 
 var MESSAGES = {
   isDate: "%s is not a date",
-  isEmail: "%s is not an email address",
   isUrl: "%s is not a URL",
   isIP: "%s is not an IP address",
   isAlpha: "%s contains non-letter characters",
@@ -225,7 +224,7 @@ var MESSAGES = {
 };
 
 Object.keys(ValidatorPrototype).forEach(function (name) {
-  if (name.match(/^(contains|notContains|equals|check|validate|assert|error|len|isNumeric|isDecimal|isFloat|regex|notRegex|is|not|notNull|isNull)$/)) {
+  if (name.match(/^(contains|notContains|equals|check|validate|assert|error|len|isNumeric|isDecimal|isEmail|isFloat|regex|notRegex|is|not|notNull|isNull)$/)) {
     return;
   }
 
@@ -308,6 +307,16 @@ Field.prototype.isFloat = Field.prototype.isDecimal = function (message) {
   });
 };
 
+// super simple email validation
+Field.prototype.isEmail = function (message) {
+  return this.add(function (value) {
+    if (typeof value != 'string' || !(/\S+@\S+/).test(value)) {
+      return { error: message || "%s is not an email address" };
+    }
+    return { valid: true };
+  });
+};
+
 Field.prototype.isString = function (message) {
   return this.add(function (value) {
     if (!object.isString(value)) {