--- a/Services/DocumentService.php	Fri Dec 09 06:43:49 2011 +0100
+++ b/Services/DocumentService.php	Wed Dec 14 23:28:57 2011 +0100
@@ -9,8 +9,10 @@
  */
 namespace IRI\Bundle\WikiTagBundle\Services;
  
+use IRI\Bundle\WikiTagBundle\Entity\DocumentTag;
 use Symfony\Component\DependencyInjection\ContainerAware;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+use IRI\Bundle\WikiTagBundle\Utils\WikiTagUtils;
 
 class DocumentService extends ContainerAware
 {
@@ -46,6 +48,7 @@
 
     /**
      * Copy the list of tags of one document to another.
+     * The ids are the ids of the "host" document.
 	 *
      * @param mixed $id_doc_src the source document id
      * @param mixed $id_doc_tgt the target document id
@@ -77,5 +80,90 @@
         
     }
     
+    /**
+     *
+     * Add a new tag to a "host" document.
+     * If the label already exists, an exception is raised.
+     *
+     * @param mixed $id_doc
+     * @param string|array $tag_label : the label of the new tag
+     */
+    public function addTags($id_doc, $tag_labels)
+    {
+        // We get the DocumentTags
+        $em = $this->getDoctrine()->getEntityManager();
+        
+        $need_flush = false;
+        
+        
+        if(!is_array($tag_labels)) {
+            $tag_labels = array($tag_labels);
+        }
+        
+        foreach ($tag_labels as $tag_label) {
+        
+            $normalized_tag_label = WikiTagUtils::normalizeTag($tag_label);
+            
+            $query = $em->createQuery("SELECT COUNT(dt.id) FROM WikiTagBundle:DocumentTag dt JOIN dt.tag t WHERE dt.document = :id_doc AND t.normalizedLabel = :label");
+            $query->setParameters(array("id_doc"=>$id_doc, "label"=>$normalized_tag_label));
+            
+            $nb_tags = $query->getSingleScalarResult();
+            
+            // If the label was found, we sent a bad request
+            if($nb_tags > 0){
+                throw new WikiTagServiceException(sprintf("Le tag %s existe déjà pour cette fiche.", $tag_label), 400, null, "duplicate_tag");
+            }
+            // returns array($tag, $revision_id, $created)
+            try {
+                $ar = $this->getDoctrine()->getRepository('WikiTagBundle:Tag')->getOrCreateTag($tag_label);
+            }
+            catch (\Exception $e){
+                throw new WikiTagServiceException($e->getMessage(), 500 , $e, "wikipedia_request_failed");
+            }
+            
+            $tag = $ar[0];
+            $revision_id = $ar[1];
+            $created = $ar[2];
+            
+            $tags = $this->getDoctrine()->getRepository('WikiTagBundle:DocumentTag')->findByDocumentExternalId($id_doc, array('tag'=>$tag->getId()));
+            $nb_tags = count($tags);
+            
+            if($created==true || $nb_tags==0){
+                $new_order_ar = $this->getDoctrine()->getRepository('WikiTagBundle:DocumentTag')->getMaxOrder($id_doc);
+                // The result is a double array. And reset(reset($newOrderAr)) is not allowed. And a string is returned.
+                $a1 = reset($new_order_ar);
+                $new_order = intval(reset($a1)) + 1;
+                $new_DT = new DocumentTag();
+                $new_DT->setDocument($this->getDoctrine()->getRepository('WikiTagBundle:Document')->findOneByExternalId($id_doc));
+                $new_DT->setTag($tag);
+                $new_DT->setOriginalOrder($new_order);
+                $new_DT->setTagOrder($new_order);
+                $new_DT->setWikipediaRevisionId($revision_id);
+                $em->persist($new_DT);
+                $need_flush = true;
+                
+            }
+        }
+        
+        if($need_flush) {
+            $em->flush();
+        }
+        
+        
+    }
+    
+    public function getTagLabels($id_doc)
+    {
+        $rep = $this->getDoctrine()->getRepository('WikiTagBundle:Document');
+        $doc = $rep->findOneByExternalId($id_doc);
+        
+        if(is_null($doc)) {
+            throw new WikiTagServiceException("Unknown document id");
+        }
+        
+        return $rep->getTagsStr($doc);
+
+    }
+    
         
 }
\ No newline at end of file