add language fallback to translatable string

refs #332

Resources/config/services.yml

@@ -42,6 +42,7 @@ services:
         class: Chill\MainBundle\Templating\TranslatableStringHelper
         arguments:
             - "@request_stack"
+            - "@translator.default"
 
     chill.main.twig.translatable_string:
         class: Chill\MainBundle\Templating\TranslatableStringTwig

Templating/TranslatableStringHelper.php

@@ -22,6 +22,7 @@
 namespace Chill\MainBundle\Templating;
 
 use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Translation\Translator;
 
 /**
  * 
@@ -38,9 +39,12 @@ class TranslatableStringHelper
      */
     private $requestStack;
     
-    public function __construct(RequestStack $requestStack)
+    private $fallbackLocales;
+    
+    public function __construct(RequestStack $requestStack, Translator $translator)
     {
         $this->requestStack = $requestStack;
+        $this->fallbackLocales = $translator->getFallbackLocales();
     }
     
     /**
@@ -64,13 +68,16 @@ class TranslatableStringHelper
         
 
         if (isset($translatableStrings[$language])) {
+            
             return $translatableStrings[$language];
         } else {
-            foreach ($translatableStrings as $string) {
+            foreach ($this->fallbackLocales as $locale) {
-                if (!empty($string)) {
+                if (array_key_exists($locale, $translatableStrings)) {
-                    return $string;
+                    
+                    return $translatableStrings[$locale];
                 }
             }
+            
         }
     
         return '';