big locale logic switchover

src/js/stores/LocaleStore.js

@@ -9,9 +9,56 @@ var assign = require('object-assign');
 var ActionTypes = AppConstants.ActionTypes;
 var CHANGE_EVENT = 'change';
 
+// resolve the messy mapping between browser language
+// and our supported locales
+var langLocaleMap = {
+  en: 'en_US',
+  zh: 'zh_CN',
+  ja: 'ja',
+  ko: 'ko',
+  es: 'es_AR',
+  fr: 'fr_FR',
+  de: 'de_DE',
+  pt: 'pt_BR'
+};
+
+var headerLocaleMap = {
+  'zh-CN': 'zh_CN',
+  'zh-TW': 'zh_TW',
+  'pt-BR': 'pt_BR'
+};
+
+function _getLocaleFromHeader(langString) {
+  var languages = langString.split(',');
+  var desiredLocale;
+  for (var i = 0; i < languages.length; i++) {
+    var header = languages[i].split(';')[0];
+    // first check the full string raw
+    if (headerLocaleMap[header]) {
+      desiredLocale = headerLocaleMap[header];
+      break;
+    }
+
+    var lang = header.slice(0, 2);
+    if (langLocaleMap[lang]) {
+      desiredLocale = langLocaleMap[lang];
+      break;
+    }
+  }
+  return desiredLocale;
+}
+
 var _locale = 'en_US';
 var LocaleStore = assign({}, EventEmitter.prototype, {
 
+  getLangLocaleMap: function() {
+    return assign({}, langLocaleMap);
+  },
+
+  getHeaderLocaleMap: function() {
+    return assign({}, headerLocaleMap);
+  },
+
   subscribe: function(cb) {
     this.on(CHANGE_EVENT, cb);
   },
@@ -33,6 +80,13 @@ var LocaleStore = assign({}, EventEmitter.prototype, {
         _locale = action.locale;
         shouldInform = true;
         break;
+      case ActionTypes.CHANGE_LOCALE_FROM_HEADER:
+        var value = _getLocaleFromHeader(action.header);
+        if (value) {
+          _locale = value;
+          shouldInform = true;
+        }
+        break;
     }
 
     if (shouldInform) {