Merge pull request #863 from gobuffalo/i18n-available-languages

Add a way to get the list of supported languages in a Buffalo app

middleware/i18n/i18n.go

@@ -145,6 +145,11 @@ func (t *Translator) Translate(c buffalo.Context, translationID string, args ...
 	return T(translationID, args...)
 }
 
+// AvailableLanguages gets the list of languages provided by the app
+func (t *Translator) AvailableLanguages() []string {
+	return i18n.LanguageTags()
+}
+
 func defaultLanguageFinder(t *Translator, c buffalo.Context) []string {
 	langs := []string{}
 

middleware/i18n/i18n_test.go

@@ -49,6 +49,9 @@ func app() *buffalo.App {
 	app.GET("/localized", func(c buffalo.Context) error {
 		return c.Render(200, r.HTML("localized_view.html"))
 	})
+	app.GET("/languages-list", func(c buffalo.Context) error {
+		return c.Render(200, r.JSON(t.AvailableLanguages()))
+	})
 	// Disable i18n middleware
 	noI18n := func(c buffalo.Context) error {
 		return c.Render(200, r.HTML("localized_view.html"))
@@ -149,3 +152,11 @@ func Test_i18n_collision(t *testing.T) {
 	res := w.Request("/collision").Get()
 	r.Equal("Collision OK", strings.TrimSpace(res.Body.String()))
 }
+
+func Test_i18n_availableLanguages(t *testing.T) {
+	r := require.New(t)
+
+	w := willie.New(app())
+	res := w.Request("/languages-list").Get()
+	r.Equal("[\"en-us\",\"fr-fr\"]", strings.TrimSpace(res.Body.String()))
+}