Add "localizePrice" helper

Author: bookernath

helpers/localizePrice.js

@@ -0,0 +1,30 @@
+'use strict';
+const common = require('./lib/common.js');
+
+const factory = globals => {
+    return function(price, locale) {
+
+        if (!common.isObject(price) || !common.isString(price.currency) || isNaN(price.value)) {
+            // Return empty string if this does not appear to be a price object
+            return ''
+        }
+
+        if (!common.isString(locale) || locale.length < 2) {
+            // Valid browser language strings are at least two characters
+            // https://www.metamodpro.com/browser-language-codes
+            // If provided locale is less than two characters (or not a string),
+            // Default to 'en-US'
+            locale = 'en-US';
+        }
+
+        return new Intl.NumberFormat(
+                locale, { style: 'currency', currency: price.currency}
+            ).format(price.value);
+
+    };
+};
+
+module.exports = [{
+    name: 'localizePrice',
+    factory: factory,
+}];

spec/helpers.js

@@ -39,6 +39,7 @@ describe('helper registration', () => {
             'lang',
             'langJson',
             'limit',
+            'localizePrice',
             'money',
             'nl2br',
             'or',