Adding data transformer Person<>ID

Form/DataTransformer/PersonToIdTransformer.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace CL\Chill\PersonBundle\Form\DataTransformer;
+
+use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
+use Doctrine\Common\Persistence\ObjectManager;
+use CL\Chill\PersonBundle\Entity\Person;
+
+class PersonToIdTransformer implements DataTransformerInterface
+{
+    /**
+     * @var ObjectManager
+     */
+    private $om;
+
+    /**
+     * @param ObjectManager $om
+     */
+    public function __construct(ObjectManager $om)
+    {
+        $this->om = $om;
+    }
+
+    /**
+     * Transforms an object (issue) to a string (id).
+     *
+     * @param  Issue|null $issue
+     * @return string
+     */
+    public function transform($issue)
+    {
+        if (null === $issue) {
+            return "";
+        }
+
+        return $issue->getId();
+    }
+
+    /**
+     * Transforms a string (id) to an object (issue).
+     *
+     * @param  string $id
+     *
+     * @return Issue|null
+     *
+     * @throws TransformationFailedException if object (issue) is not found.
+     */
+    public function reverseTransform($id)
+    {
+        if (!$id) {
+            return null;
+        }
+
+        $issue = $this->om
+            ->getRepository('CLChillPersonBundle:Person')
+            ->findOneBy(array('id' => $id))
+        ;
+
+        if (null === $issue) {
+            throw new TransformationFailedException(sprintf(
+                'An issue with id "%s" does not exist!',
+                $id
+            ));
+        }
+
+        return $issue;
+    }
+}
+?>