[TASK] Add language selection and language util

app.js

@@ -17,7 +17,8 @@ require.config({
     'd3': '../node_modules/d3/d3.min',
     'virtual-dom': '../node_modules/virtual-dom/dist/virtual-dom',
     'rbush': '../node_modules/rbush/rbush',
-    'helper': 'utils/helper'
+    'helper': 'utils/helper',
+    'language': 'utils/language'
   },
   shim: {
     'leaflet.label': ['leaflet'],

lib/gui.js

@@ -7,7 +7,7 @@ define(['chroma-js', 'map', 'sidebar', 'tabs', 'container', 'legend',
             Title, About, DataDistributor, FilterGUI, HostnameFilter) {
     'use strict';
 
-    return function (config, router) {
+    return function (config, router, language) {
       var self = this;
       var content;
       var contentDiv;
@@ -81,7 +81,7 @@ define(['chroma-js', 'map', 'sidebar', 'tabs', 'container', 'legend',
       var infobox = new Infobox(config, sidebar, router);
       var tabs = new Tabs();
       var overview = new Container();
-      var legend = new Legend(config);
+      var legend = new Legend(config, language);
       var newnodeslist = new SimpleNodelist('new', 'firstseen', router, _.t('node.new'));
       var lostnodeslist = new SimpleNodelist('lost', 'lastseen', router, _.t('node.missing'));
       var nodelist = new Nodelist(router);

lib/legend.js

 define(['helper'], function (helper) {
   'use strict';
 
-  return function (config) {
+  return function (config, language) {
     var self = this;
     var stats = document.createTextNode('');
     var timestamp = document.createTextNode('');
@@ -28,6 +28,8 @@ define(['helper'], function (helper) {
       h2.textContent = config.siteName;
       el.appendChild(h2);
 
+      language.languageSelect(el);
+
       var p = document.createElement('p');
       p.classList.add('legend');
       p.innerHTML = '<span class="legend-new"><span class="symbol"></span> ' + _.t('sidebar.nodeNew') + '</span>' +

lib/main.js

-define(['polyglot', 'moment', 'router', 'leaflet', 'gui', 'helper'],
-  function (Polyglot, moment, Router, L, GUI, helper) {
+define(['polyglot', 'moment', 'router', 'leaflet', 'gui', 'helper', 'language'],
+  function (Polyglot, moment, Router, L, GUI, helper, Language) {
     'use strict';
 
     return function (config) {
@@ -150,35 +150,7 @@ define(['polyglot', 'moment', 'router', 'leaflet', 'gui', 'helper'],
         };
       }
 
-      function setTranslation(json) {
-        _.extend(json);
-
-        moment.locale(_.locale(), {
-          longDateFormat: {
-            LT: 'HH:mm',
-            LTS: 'HH:mm:ss',
-            L: 'DD.MM.YYYY',
-            LL: 'D. MMMM YYYY',
-            LLL: 'D. MMMM YYYY HH:mm',
-            LLLL: 'dddd, D. MMMM YYYY HH:mm'
-          },
-          calendar: json.momentjs.calendar,
-          relativeTime: json.momentjs.relativeTime
-        });
-      }
-
-      var language = navigator.languages && navigator.languages[0] || navigator.language || navigator.userLanguage;
-      var locale = config.supportedLocale[0];
-      config.supportedLocale.some(function (item) {
-        if (language.indexOf(item) !== -1) {
-          locale = item;
-          return true;
-        }
-        return false;
-      });
-
-      window._ = new Polyglot({ locale: locale, allowMissing: true });
-      helper.getJSON('locale/' + _.locale() + '.json?' + config.cacheBreaker).then(setTranslation);
+      var language = new Language(config);
 
       var router = new Router();
 
@@ -200,7 +172,7 @@ define(['polyglot', 'moment', 'router', 'leaflet', 'gui', 'helper'],
 
       update()
         .then(function (d) {
-          var gui = new GUI(config, router);
+          var gui = new GUI(config, router, language);
           gui.setData(d);
           router.setData(d);
           router.start();

lib/utils/language.js

+define(['polyglot', 'moment', 'helper'], function (Polyglot, moment, helper) {
+  'use strict';
+  return function (config) {
+    function languageSelect(el) {
+      var select = document.createElement('select');
+      select.className = 'language-switch';
+      select.addEventListener('change', setLocale);
+      el.appendChild(select);
+
+      // Keep english
+      select.innerHTML = '<option>Language</option>';
+      for (var i = 0; i < config.supportedLocale.length; i++) {
+        select.innerHTML += '<option value="' + config.supportedLocale[i] + '">' + config.supportedLocale[i] + '</option>';
+      }
+    }
+
+    function setLocale(event) {
+      localStorage.setItem('language', getLocale(event.target.value));
+      location.reload();
+    }
+
+    function getLocale(input) {
+      var language = input || localStorage.getItem('language') || navigator.languages && navigator.languages[0] || navigator.language || navigator.userLanguage;
+      var locale = config.supportedLocale[0];
+      config.supportedLocale.some(function (item) {
+        if (language.indexOf(item) !== -1) {
+          locale = item;
+          return true;
+        }
+        return false;
+      });
+      return locale;
+    }
+
+    function setTranslation(json) {
+      _.extend(json);
+
+      moment.locale(_.locale(), {
+        longDateFormat: {
+          LT: 'HH:mm',
+          LTS: 'HH:mm:ss',
+          L: 'DD.MM.YYYY',
+          LL: 'D. MMMM YYYY',
+          LLL: 'D. MMMM YYYY HH:mm',
+          LLLL: 'dddd, D. MMMM YYYY HH:mm'
+        },
+        calendar: json.momentjs.calendar,
+        relativeTime: json.momentjs.relativeTime
+      });
+    }
+
+    window._ = new Polyglot({ locale: getLocale(), allowMissing: true });
+    helper.getJSON('locale/' + _.locale() + '.json?' + config.cacheBreaker).then(setTranslation);
+
+    return {
+      languageSelect: languageSelect
+    };
+  };
+});

scss/modules/_legend.scss

+header {
+  h2 {
+    display: inline-block;
+  }
+}
+
+.language-switch {
+  background: transparent;
+  border: 0;
+  color: $color-black;
+  float: right;
+  margin: 20px 16px 0 0;
+
+  option {
+    background: $color-white;
+  }
+}
+
 .legend {
   .symbol {
     border-radius: 50%;

scss/night.scss

@@ -35,6 +35,14 @@ html {
     }
   }
 
+  .language-switch {
+    color: $color-black;
+
+    option {
+      background: $color-white;
+    }
+  }
+
   //@import 'modules/filter';
   .filter-node {
     input {