#179: Add vat validator

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## v0.4.3 (not released yet)
 
 * [#77](https://github.com/nghuuphuoc/bootstrapvalidator/issues/77): Add ```file``` validator
+* [#179](https://github.com/nghuuphuoc/bootstrapvalidator/issues/179): Add ```vat``` validator
 * [#198](https://github.com/nghuuphuoc/bootstrapvalidator/pull/198): Add Canadian Postal Code support for the [```zipCode``` validator](http://bootstrapvalidator.com/validators/zip-code/), thanks to [@Francismori7](https://github.com/Francismori7)
 * [#202](https://github.com/nghuuphuoc/bootstrapvalidator/issues/202): Activate tab containing the first invalid field
 * [#205](https://github.com/nghuuphuoc/bootstrapvalidator/issues/205): Plugin method invocation

src/js/validator/vat.js

@@ -0,0 +1,63 @@
+(function($) {
+    $.fn.bootstrapValidator.validators.vat = {
+        html5Attributes: {
+            message: 'message',
+            country: 'country'
+        },
+
+        /**
+         * Validate an European VAT number
+         *
+         * @param {BootstrapValidator} validator The validator plugin instance
+         * @param {jQuery} $field Field element
+         * @param {Object} options Consist of key:
+         * - message: The invalid message
+         * - country: The ISO 3166-1 country code
+         * @returns {Boolean}
+         */
+        validate: function(validator, $field, options) {
+            var value = $field.val();
+            if (value == '' || !options.country) {
+                return true;
+            }
+
+            var vatRegex = {
+                'AT': 'ATU[0-9]{8}',                                // Austria
+                'BE': 'BE[0]{0,1}[0-9]{9}',                         // Belgium
+                'BG': 'BG[0-9]{9,10}',                              // Bulgaria
+                'CY': 'CY[0-9]{8}L',                                // Cyprus
+                'CZ': 'CZ[0-9]{8,10}',                              // Czech Republic
+                'DE': 'DE[0-9]{9}',                                 // Germany
+                'DK': 'DK[0-9]{8}',                                 // Denmark
+                'EE': 'EE[0-9]{9}',                                 // Estonia
+                'ES': 'ES[0-9A-Z][0-9]{7}[0-9A-Z]',                 // Spain
+                'FI': 'FI[0-9]{8}',                                 // Finland
+                'FR': 'FR[0-9A-Z]{2}[0-9]{9}',                      // France
+                'EL': 'EL[0-9]{9}',                                 // Greece (EL is traditionally prefix of Greek VAT numbers)
+                'GR': 'GR[0-9]{9}',                                 // Greece
+                'GB': 'GB([0-9]{9}([0-9]{3})?|[A-Z]{2}[0-9]{3})',   // United Kingdom
+                'HU': 'HU[0-9]{8}',                                 // Hungary
+                'IE': 'IE[0-9]S[0-9]{5}L',                          // Ireland
+                'IT': 'IT[0-9]{11}',                                // Italy
+                'LT': 'LT([0-9]{9}|[0-9]{12})',                     // Lithuania
+                'LU': 'LU[0-9]{8}',                                 // Luxembourg
+                'LV': 'LV[0-9]{11}',                                // Latvia
+                'MT': 'MT[0-9]{8}',                                 // Malta
+                'NL': 'NL[0-9]{9}B[0-9]{2}',                        // Netherlands
+                'PL': 'PL[0-9]{10}',                                // Poland
+                'PT': 'PT[0-9]{9}',                                 // Portugal
+                'RO': 'RO[0-9]{2,10}',                              // Romania
+                'SE': 'SE[0-9]{12}',                                // Sweden
+                'SI': 'SI[0-9]{8}',                                 // Slovenia
+                'SK': 'SK[0-9]{10}'                                 // Slovakia
+            };
+
+            value = value.replace(/[^a-zA-Z0-9]/g, '').toUpperCase();
+            var country = options.country || value.substr(0, 2);
+            if (!vatRegex[country]) {
+                return false;
+            }
+            return (new RegExp('^' + vatRegex[country] + '$')).test(value);
+        }
+    };
+}(window.jQuery));