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gaia/apps/calendar/js/date_l10n.js

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+define(function(require, exports) {
+'use strict';
+
+var IntlHelper = require('shared/intl_helper');
+
+/**
+ * Observes localized events and localizes elements
+ * with data-l10n-date-format should be registered
+ * after the first localized event.
+ *
+ *
+ * Example:
+ *
+ *
+ *    <span
+ *      data-date="Wed Jan 09 2013 19:25:38 GMT+0100 (CET)"
+ *      data-l10n-date-format="%x">
+ *
+ *      2013/9/19
+ *
+ *    </span>
+ *
+ */
+
+exports.init = function() {
+  window.addEventListener('localized', exports._localizeElements);
+  window.addEventListener('timeformatchange', exports._localizeElements);
+};
+
+/**
+ * Localizes all elements with data-l10n-date-format.
+ */
+exports._localizeElements = function() {
+  var elements = document.querySelectorAll('[data-l10n-date-format]');
+  for (var i = 0; i < elements.length; i++) {
+    exports._localizeElement(elements[i]);
+  }
+};
+
+/**
+ * Localize a single element expected to have data-l10n-date-format.
+ */
+exports._localizeElement = function(element) {
+  var date = element.dataset.date;
+  if (!date) {
+    return;
+  }
+
+  var format = element.dataset.l10nDateFormat;
+  var formatter = IntlHelper.get(format);
+  var text;
+
+  if (format === 'week-hour-format') {
+    text = formatter.format(new Date(date), {
+      dayperiod: '<span class="ampm" aria-hidden="true">$&</span>',
+    });
+  } else {
+    text = formatter.format(new Date(date));
+  }
+
+  element.textContent = text;
+};
+
+});