diff -r e854d8cb376c -r 186c4121c7b3 Services/DocumentService.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Services/DocumentService.php	Tue Dec 06 14:53:12 2011 +0100
@@ -0,0 +1,81 @@
+<?php
+/*
+ * This file is part of the WikiTagBundle package.
+ *
+ * (c) IRI <http://www.iri.centrepompidou.fr/>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace IRI\Bundle\WikiTagBundle\Services;
+ 
+use Symfony\Component\DependencyInjection\ContainerAware;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+class DocumentService extends ContainerAware
+{
+    /**
+     * Get the container associated with this service.
+     * @return ContainerInterface
+     */
+    public function getContainer()
+    {
+        return $this->container;
+    }
+    
+    /**
+     * Public constructor with container as parameter for contruct injection.
+     * @param ContainerInterface $container
+     */
+    public function __construct(ContainerInterface $container)
+    {
+        $this->setContainer($container);
+    }
+    
+    private $doctrine;
+    
+    public function getDoctrine()
+    {
+        if(is_null($this->doctrine))
+        {
+            $this->doctrine = $this->getContainer()->get('doctrine');
+        }
+        return $this->doctrine;
+    }
+    
+
+    /**
+     * Copy the list of tags of one document to another.
+	 *
+     * @param mixed $id_doc_src the source document id
+     * @param mixed $id_doc_tgt the target document id
+     */
+    public function copyTags($id_doc_src, $id_doc_tgt)
+    {
+        
+        $doctrine = $this->getDoctrine();
+        $em = $doctrine->getEntityManager();
+        
+        $doc_rep = $em->getRepository("WikiTagBundle:Document");
+        
+        $src_doc = $doc_rep->findOneByExternalId($id_doc_src);
+        if(is_null($src_doc))
+        {
+            throw new Exception("cloneTags: no source doc");
+        }
+        
+        $tgt_doc = $doc_rep->findOneByExternalId($id_doc_tgt);
+        if(is_null($tgt_doc))
+        {
+            throw new Exception("cloneTags: no target doc");
+        }
+        
+        
+        $doc_rep->copyTags($src_doc, $tgt_doc);
+        
+        $em->flush();
+        
+    }
+    
+        
+}
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