Merge pull request #6209 from betagouv/localize-dropdown-button

i18n : ajout d’un sélecteur de langue (désactivé par défaut) (#6209)

app/controllers/application_controller.rb

@@ -18,7 +18,8 @@ class ApplicationController < ActionController::Base
   before_action :set_active_storage_host
   before_action :setup_javascript_settings
   before_action :setup_tracking
-  before_action :set_locale
+
+  around_action :switch_locale
 
   helper_method :multiple_devise_profile_connect?, :instructeur_signed_in?, :current_instructeur, :current_expert, :expert_signed_in?,
     :administrateur_signed_in?, :current_administrateur, :current_account
@@ -308,9 +309,15 @@ class ApplicationController < ActionController::Base
     current_user&.email
   end
 
-  def set_locale
-    if ENV.fetch('LOCALIZATION_ENABLED', 'false') == 'true'
-      I18n.locale = http_accept_language.compatible_language_from(I18n.available_locales)
+  def switch_locale(&action)
+    locale = nil
+    if cookies[:locale]
+      locale = cookies[:locale]
+    elsif ENV.fetch('LOCALIZATION_ENABLED', 'false') == 'true'
+      locale = http_accept_language.compatible_language_from(I18n.available_locales)
+    else
+      locale = I18n.default_locale
     end
+    I18n.with_locale(locale, &action)
   end
 end

app/controllers/root_controller.rb

@@ -87,4 +87,9 @@ class RootController < ApplicationController
       format.js { render js: helpers.remove_element('#outdated-browser-banner') }
     end
   end
+
+  def save_locale
+    cookies[:locale] = params[:locale]
+    redirect_to request.referer
+  end
 end

app/views/layouts/_header.haml

@@ -87,3 +87,7 @@
 
         - else
           = render partial: 'shared/help/help_button'
+
+      - if ENV.fetch('LOCALIZATION_ENABLED', 'false') == 'true'
+        %li
+          = render partial: 'layouts/locale_dropdown'

app/views/layouts/_locale_dropdown.html.haml

@@ -0,0 +1,11 @@
+.dropdown.locale-dropdown
+  %button.button.dropdown-button.icon-only.header-menu-button{ title: "Translate", 'aria-expanded' => 'false', 'aria-controls' => 'locale_menu' }
+    .hidden Translate
+    = image_tag "icons/translate-icon.svg", alt: 'Translate', 'aria-hidden':'true'
+  %ul.header-menu.dropdown-content
+    %li
+    = link_to save_locale_path(locale: :en), method: :post, class: "menu-item menu-link" do
+      EN - English
+    %li
+    = link_to save_locale_path(locale: :fr), method: :post, class: "menu-item menu-link" do
+      FR - français

config/routes.rb

@@ -152,6 +152,7 @@ Rails.application.routes.draw do
   get "patron" => "root#patron"
   get "suivi" => "root#suivi"
   post "dismiss_outdated_browser" => "root#dismiss_outdated_browser"
+  post "save_locale" => "root#save_locale"
 
   get "contact", to: "support#index"
   post "contact", to: "support#create"