Make interface language configurable from settings

The locale can now be configured in settings and is stored in
Vuex. The changes are applied immidiately after selection. The list of
languages is taken from the messages file, which contains all the
available locales (and a new value, `interfaceLanguage`, to control
the translation of this option in the options menu)

Closes #36

package.json

@@ -63,6 +63,7 @@
     "html-webpack-plugin": "^2.8.1",
     "http-proxy-middleware": "^0.17.2",
     "inject-loader": "^2.0.1",
+    "iso-639-1": "^2.0.3",
     "isparta-loader": "^2.0.0",
     "json-loader": "^0.5.4",
     "karma": "^1.3.0",

src/App.js

@@ -20,6 +20,10 @@ export default {
   data: () => ({
     mobileActivePanel: 'timeline'
   }),
+  created () {
+    // Load the locale from the storage
+    this.$i18n.locale = this.$store.state.config.interfaceLanguage
+  },
   computed: {
     currentUser () { return this.$store.state.users.currentUser },
     background () {

src/components/interface_language_switcher/interface_language_switcher.vue

@@ -0,0 +1,38 @@
+<template>
+  <div>
+    <label for="interface-language-switcher" class='select'>
+      <select id="interface-language-switcher" v-model="language">
+        <option v-for="(langCode, i) in languageCodes" :value="langCode">
+          {{ languageNames[i] }}
+        </option>
+      </select>
+      <i class="icon-down-open"/>
+    </label>
+  </div>
+</template>
+
+<script>
+  import languagesObject from '../../i18n/messages'
+  import ISO6391 from 'iso-639-1'
+  import _ from 'lodash'
+
+  export default {
+    computed: {
+      languageCodes () {
+        return Object.keys(languagesObject)
+      },
+
+      languageNames () {
+        return _.map(this.languageCodes, ISO6391.getName)
+      },
+
+      language: {
+        get: function () { return this.$store.state.config.interfaceLanguage },
+        set: function (val) {
+          this.$store.dispatch('setOption', { name: 'interfaceLanguage', value: val })
+          this.$i18n.locale = val
+        }
+      }
+    }
+  }
+</script>

src/components/settings/settings.js

@@ -1,5 +1,6 @@
 /* eslint-env browser */
 import StyleSwitcher from '../style_switcher/style_switcher.vue'
+import InterfaceLanguageSwitcher from '../interface_language_switcher/interface_language_switcher.vue'
 import { filter, trim } from 'lodash'
 
 const settings = {
@@ -28,7 +29,8 @@ const settings = {
     }
   },
   components: {
-    StyleSwitcher
+    StyleSwitcher,
+    InterfaceLanguageSwitcher
   },
   computed: {
     user () {

src/components/settings/settings.vue

@@ -84,6 +84,10 @@
         </li>
       </ul>
     </div>
+    <div class="setting-item">
+      <h2>{{ $t('settings.interfaceLanguage') }}</h2>
+      <interface-language-switcher />
+    </div>
   </div>
 </div>
 </template>

src/i18n/messages.js

@@ -350,7 +350,8 @@ const en = {
     default_vis: 'Default visibility scope',
     profile_tab: 'Profile',
     security_tab: 'Security',
-    data_import_export_tab: 'Data Import / Export'
+    data_import_export_tab: 'Data Import / Export',
+    interfaceLanguage: 'Interface language'
   },
   notifications: {
     notifications: 'Notifications',
@@ -1689,7 +1690,8 @@ const ru = {
     profile_tab: 'Профиль',
     security_tab: 'Безопасность',
     data_import_export_tab: 'Импорт / Экспорт данных',
-    collapse_subject: 'Сворачивать посты с темой'
+    collapse_subject: 'Сворачивать посты с темой',
+    interfaceLanguage: 'Язык интерфейса'
   },
   notifications: {
     notifications: 'Уведомления',

src/main.js

@@ -60,6 +60,7 @@ const persistedStateOptions = {
     'config.loopVideoSilentOnly',
     'config.pauseOnUnfocused',
     'config.stopGifs',
+    'config.interfaceLanguage',
     'users.lastLoginName',
     'statuses.notifications.maxSavedId'
   ]
@@ -79,6 +80,7 @@ const store = new Vuex.Store({
 })
 
 const i18n = new VueI18n({
+  // By default, use the browser locale, we will update it if neccessary
   locale: currentLocale,
   fallbackLocale: 'en',
   messages
@@ -201,4 +203,3 @@ window.fetch('/nodeinfo/2.0.json')
     store.dispatch('setOption', { name: 'suggestionsEnabled', value: suggestions.enabled })
     store.dispatch('setOption', { name: 'suggestionsWeb', value: suggestions.web })
   })
-

src/modules/config.js

@@ -1,6 +1,8 @@
 import { set, delete as del } from 'vue'
 import StyleSetter from '../services/style_setter/style_setter.js'
 
+const browserLocale = (window.navigator.language || 'en').split('-')[0]
+
 const defaultState = {
   name: 'Pleroma FE',
   colors: {},
@@ -17,7 +19,8 @@ const defaultState = {
   stopGifs: false,
   replyVisibility: 'all',
   muteWords: [],
-  highlight: {}
+  highlight: {},
+  interfaceLanguage: browserLocale
 }
 
 const config = {

yarn.lock

@@ -3081,6 +3081,10 @@ isexe@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
 
+iso-639-1@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/iso-639-1/-/iso-639-1-2.0.3.tgz#72dd3448ac5629c271628c5ac566369428d6ccd0"
+
 isobject@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/isobject/-/isobject-2.1.0.tgz#f065561096a3f1da2ef46272f815c840d87e0c89"