Feature: Introduce locale in web-widget SDK (#871)

* Introduce setLocale in SDK

Co-authored-by: Sojan <sojan@pepalo.com>

app/controllers/application_controller.rb

@@ -29,7 +29,11 @@ class ApplicationController < ActionController::Base
   end
 
   def switch_locale(account)
-    I18n.locale = (I18n.available_locales.map(&:to_s).include?(account.locale) ? account.locale : nil) || I18n.default_locale
+    # priority is for locale set in query string (mostly for widget/from js sdk)
+    locale ||= (I18n.available_locales.map(&:to_s).include?(params[:locale]) ? params[:locale] : nil)
+    # if local is not set in param, lets try account
+    locale ||= (I18n.available_locales.map(&:to_s).include?(account.locale) ? account.locale : nil)
+    I18n.locale = locale || I18n.default_locale
   end
 
   def account_accessible_for_user?(account)

app/javascript/packs/sdk.js

@@ -10,6 +10,7 @@ const runSDK = ({ baseUrl, websiteToken }) => {
     isOpen: false,
     position: chatwootSettings.position === 'left' ? 'left' : 'right',
     websiteToken,
+    locale: chatwootSettings.locale || 'en',
 
     toggle() {
       IFrameHelper.events.toggleBubble();
@@ -36,6 +37,10 @@ const runSDK = ({ baseUrl, websiteToken }) => {
       IFrameHelper.sendMessage('remove-label', { label });
     },
 
+    setLocale(localeToBeUsed = 'en') {
+      IFrameHelper.sendMessage('set-locale', { locale: localeToBeUsed });
+    },
+
     reset() {
       if (window.$chatwoot.isOpen) {
         IFrameHelper.events.toggleBubble();

app/javascript/sdk/IFrameHelper.js

@@ -76,7 +76,9 @@ export const IFrameHelper = {
         expires: 365,
       });
       window.$chatwoot.hasLoaded = true;
-      IFrameHelper.sendMessage('config-set', {});
+      IFrameHelper.sendMessage('config-set', {
+        locale: window.$chatwoot.locale,
+      });
       IFrameHelper.onLoad(message.config.channelConfig);
       IFrameHelper.setCurrentUrl();
       IFrameHelper.toggleCloseButton();

app/javascript/widget/App.vue

@@ -19,7 +19,7 @@ export default {
   },
   mounted() {
     const { websiteToken, locale } = window.chatwootWebChannel;
-    Vue.config.lang = locale;
+    this.setLocale(locale);
 
     if (IFrameHelper.isIFrame()) {
       IFrameHelper.sendMessage({
@@ -44,6 +44,7 @@ export default {
       if (message.event === 'config-set') {
         this.fetchOldConversations();
         this.fetchAvailableAgents(websiteToken);
+        this.setLocale(message.locale);
       } else if (message.event === 'widget-visible') {
         this.scrollConversationToBottom();
       } else if (message.event === 'set-current-url') {
@@ -58,6 +59,8 @@ export default {
         this.$store.dispatch('conversationLabels/destroy', message.label);
       } else if (message.event === 'set-user') {
         this.$store.dispatch('contacts/update', message);
+      } else if (message.event === 'set-locale') {
+        this.setLocale(message.locale);
       }
     });
 
@@ -71,6 +74,12 @@ export default {
       const container = this.$el.querySelector('.conversation-wrap');
       container.scrollTop = container.scrollHeight;
     },
+    setLocale(locale) {
+      const { enabledLanguages } = window.chatwootWebChannel;
+      if (enabledLanguages.some(lang => lang.iso_639_1_code === locale)) {
+        Vue.config.lang = locale;
+      }
+    },
   },
 };
 </script>

app/javascript/widget/api/endPoints.js

@@ -1,13 +1,26 @@
-const sendMessage = content => ({
-  url: `/api/v1/widget/messages${window.location.search}`,
-  params: {
-    message: {
-      content,
-      timestamp: new Date().toString(),
-      referer_url: window.refererURL || '',
+import Vue from 'vue';
+
+const sendMessage = content => {
+  const locale = Vue.config.lang;
+  const refererURL = window.refererURL || '';
+  let search = window.location.search;
+  if (search) {
+    search = `${search}&locale=${locale}`;
+  } else {
+    search = `?locale=${locale}`;
+  }
+
+  return {
+    url: `/api/v1/widget/messages${search}`,
+    params: {
+      message: {
+        content,
+        timestamp: new Date().toString(),
+        referer_url: refererURL,
+      },
     },
-  },
-});
+  };
+};
 
 const sendAttachment = ({ attachment }) => {
   const { refererURL = '' } = window;

app/javascript/widget/api/specs/endPoints.spec.js

@@ -1,12 +1,14 @@
 import endPoints from '../endPoints';
 
+jest.mock('vue', () => ({ config: { lang: 'ar' } }));
+
 describe('#sendMessage', () => {
   it('returns correct payload', () => {
     const spy = jest.spyOn(global, 'Date').mockImplementation(() => ({
       toString: () => 'mock date',
     }));
     expect(endPoints.sendMessage('hello')).toEqual({
-      url: `/api/v1/widget/messages`,
+      url: `/api/v1/widget/messages?locale=ar`,
       params: {
         message: {
           content: 'hello',

app/javascript/widget/i18n/index.js

@@ -1,15 +1,23 @@
+import { default as ar } from './locale/ar.json';
 import { default as ca } from './locale/ca.json';
 import { default as de } from './locale/de.json';
 import { default as el } from './locale/el.json';
 import { default as en } from './locale/en.json';
+import { default as fr } from './locale/fr.json';
 import { default as ml } from './locale/ml.json';
+import { default as nl } from './locale/nl.json';
 import { default as pt } from './locale/pt.json';
+import { default as pt_BR } from './locale/pt_BR.json';
 
 export default {
+  ar,
   ca,
   de,
   el,
   en,
+  fr,
   ml,
+  nl,
   pt,
+  pt_BR,
 };

app/views/widget_tests/index.html.erb

@@ -5,6 +5,7 @@
 window.chatwootSettings = {
   hideMessageBubble: false,
   position: 'left',
+  locale: 'fr',
 };
 
 (function(d,t) {

app/views/widgets/show.html.erb

@@ -17,6 +17,7 @@
         welcomeTagline: '<%= @web_widget.welcome_tagline %>',
         welcomeTitle: '<%= @web_widget.welcome_title %>',
         widgetColor: '<%= @web_widget.widget_color %>',
+        enabledLanguages: <%= available_locales_with_name.to_json.html_safe %>,
       }
       window.chatwootWidgetDefaults = {
         useInboxAvatarForBot: <%= ActiveModel::Type::Boolean.new.cast(ENV.fetch('USE_INBOX_AVATAR_FOR_BOT', false)) %>,

docs/channels/website-sdk.md

@@ -14,6 +14,7 @@ To hide the bubble, you can use the following setting. Please not if you use thi
 window.chatwootSettings = {
   hideMessageBubble: false,
   position: 'left', // This can be left or right
+  locale: 'en', // Language to be set
 }
 ```
 
@@ -37,6 +38,14 @@ window.$chatwoot.setUser('identifier_key', {
 
 Make sure that you reset the session when the user logouts of your app.
 
+### To set language manually
+
+```js
+window.$chatwoot.setLocale('en')
+```
+
+To set the language manually use the setLocale function.
+
 ### To set labels on the conversation
 
 Please note that the labels will be set on a conversation, if the user has not started a conversation, then the following items will not have any effect.