Manage the remote translation button display

- Add remote_translation_button partial to layout
- Only display button when we have remote_translations and if current
  locale is include on available locales from remote translations service.
- Recover available locales from remote translations service.
  Use daily_cache to detect every day if remote translation service has
  added new available locale.

Co-Authored-By: alessandro <agileontheweb@gmail.com>

app/helpers/remote_translations_helper.rb

@@ -0,0 +1,6 @@
+module RemoteTranslationsHelper
+
+  def display_remote_translation_info?(remote_translations, locale)
+    remote_translations.present? && RemoteTranslations::Microsoft::AvailableLocales.include_locale?(locale)
+  end
+end

app/views/layouts/_header.html.erb

@@ -1,4 +1,7 @@
 <header>
+  <% if display_remote_translation_info?(@remote_translations, I18n.locale) %>
+    <%= render "shared/remote_translations_button", remote_translations: @remote_translations %>
+  <% end %>
 
   <div class="top-links">
     <div class="row">

lib/remote_translations/microsoft/available_locales.rb

@@ -5,8 +5,10 @@ require "json"
 
 module RemoteTranslations::Microsoft::AvailableLocales
 
-  def load_remote_locales
-    remote_available_locales.map { |locale| locale.first }
+  def available_locales
+    daily_cache("locales") do
+      remote_available_locales.map { |locale| locale.first }
+    end
   end
 
   def parse_locale(locale)
@@ -22,6 +24,10 @@ module RemoteTranslations::Microsoft::AvailableLocales
     end
   end
 
+  def include_locale?(locale)
+    available_locales.include?(parse_locale(locale).to_s)
+  end
+
   private
 
     def remote_available_locales
@@ -42,4 +48,8 @@ module RemoteTranslations::Microsoft::AvailableLocales
       JSON.parse(result)["translation"]
     end
 
+    def daily_cache(key, &block)
+      Rails.cache.fetch("remote_available_locales/#{Time.current.strftime('%Y-%m-%d')}/#{key}", &block)
+    end
+
 end

spec/features/remote_translations_spec.rb

@@ -0,0 +1,83 @@
+require "rails_helper"
+include RemoteTranslations::Microsoft::AvailableLocales
+
+describe "Remote Translations" do
+
+  before do
+    Setting["feature.remote_translations"] = true
+    create(:proposal)
+    available_locales_response = ["ar", "de", "en", "es", "fa", "fr", "he", "it", "nl", "pl",
+                                  "pt", "sv", "zh-Hans", "zh-Hant"]
+    expect_any_instance_of(RemoteTranslations::Microsoft::AvailableLocales).to receive(:available_locales).
+                                                      and_return(available_locales_response)
+  end
+
+  after do
+    allow(I18n).to receive(:available_locales).and_call_original
+    allow(I18n.fallbacks).to receive(:[]).and_call_original
+    Globalize.set_fallbacks_to_all_available_locales
+  end
+
+  describe "Display remote translation button when locale is included in microsoft translate client" do
+
+    context "with locale that has :en fallback" do
+
+      before do
+        allow(I18n.fallbacks).to receive(:[]).and_return([:en])
+        Globalize.set_fallbacks_to_all_available_locales
+      end
+
+      scenario "should display text in English" do
+        available_locales_with_fallback_en = [:ar, :de, :fa, :he, :nl, :pl, :sv]
+
+        visit root_path(locale: available_locales_with_fallback_en.sample)
+
+        expect(page).to have_css ".remote-translations-button"
+        expect(page).to have_content "The content of this page is not available in your language"
+      end
+
+      scenario "should display text in English after parse key" do
+        available_locales_with_fallback_en = [:"zh-CN", :"zh-TW"]
+
+        visit root_path(locale: available_locales_with_fallback_en.sample)
+
+        expect(page).to have_css ".remote-translations-button"
+        expect(page).to have_content "The content of this page is not available in your language"
+      end
+    end
+
+    context "with locale that has :en fallback" do
+
+      before do
+        allow(I18n.fallbacks).to receive(:[]).and_return([:es])
+        Globalize.set_fallbacks_to_all_available_locales
+      end
+
+      scenario "with locale that has :es fallback" do
+        available_locales_with_fallback_es = [:es, :fr, :it]
+
+        visit root_path(locale: available_locales_with_fallback_es.sample)
+
+        expect(page).to have_css ".remote-translations-button"
+        expect(page).to have_content "El contenido de esta página no está disponible en tu idioma"
+      end
+
+      scenario "with locale that has :es fallback and need parse key" do
+        visit root_path(locale: :"pt-BR")
+
+        expect(page).to have_css ".remote-translations-button"
+        expect(page).to have_content "El contenido de esta página no está disponible en tu idioma"
+      end
+    end
+
+  end
+
+  scenario "Not display remote translation button when locale is not included in microsoft translate client" do
+    not_available_locales = [:val, :gl, :sq]
+
+    visit root_path(locale: not_available_locales.sample)
+
+    expect(page).not_to have_css ".remote-translations-button"
+  end
+
+end