add support to need-translation attibute

Model/Message.php

@@ -75,12 +75,12 @@ public static function create($id, $domain = 'messages')
     }
 
     /**
-     * @param $id
+     * @param string $id
      * @param string $domain
      */
     public function __construct($id, $domain = 'messages')
     {
-        $this->id = $id;
+        $this->id = (string)$id;
         $this->domain = $domain;
     }
 
@@ -257,4 +257,4 @@ public function __toString()
     {
         return $this->id;
     }
-}
+}

Translation/Extractor/File/TwigFileExtractor.php

@@ -46,7 +46,7 @@ public function enterNode(\Twig_NodeInterface $node, \Twig_Environment $env)
         if ($node instanceof TransNode) {
             $id = $node->getNode('body')->getAttribute('data');
             $domain = 'messages';
-            if (null !== $domainNode = $node->getNode('domain')) {
+            if ($node->hasNode('domain') && null !== $domainNode = $node->getNode('domain')) {
                 $domain = $domainNode->getAttribute('value');
             }
 
@@ -153,4 +153,4 @@ public function leaveNode(\Twig_NodeInterface $node, \Twig_Environment $env)
 
     public function visitFile(\SplFileInfo $file, MessageCatalogue $catalogue) { }
     public function visitPhpFile(\SplFileInfo $file, MessageCatalogue $catalogue, array $ast) { }
-}
+}

Translation/Loader/Symfony/XliffLoader.php

@@ -52,6 +52,11 @@ public function load($resource, $locale, $domain = 'messages')
 
         $catalogue = new MessageCatalogue($locale);
         foreach ($xml->xpath('//xliff:trans-unit') as $translation) {
+            $attributes = $translation->attributes();
+            if (!(isset($attributes['resname']) || isset($translation->source)) || !isset($translation->target) || !$translation->target->__toString() || (isset($translation->target['state']) && $translation->target['state'] == 'needs-translation')) {
+                continue;
+            }
+
             $id = ($resName = (string) $translation->attributes()->resname)
                        ? $resName : (string) $translation->source;
 
@@ -61,4 +66,4 @@ public function load($resource, $locale, $domain = 'messages')
 
         return $catalogue;
     }
-}
+}

Translation/Updater.php

@@ -242,6 +242,15 @@ private function setConfig(Config $config)
                     $message->setLocaleString($message->getId());
                 }
             }
+        } else {
+            // new translation set as empty
+            foreach ($this->scannedCatalogue->getDomains() as $domainCatalogue) {
+                foreach ($domainCatalogue->all() as $message) {
+                    if ($message->isNew()){
+                        $message->setLocaleString('');
+                    }
+                }
+            }
         }
 
         // merge existing messages into scanned messages