1 files changed, 59 insertions, 0 deletions

diff --git a/src/Wallabag/CoreBundle/Form/DataTransformer/StringToListTransformer.php b/src/Wallabag/CoreBundle/Form/DataTransformer/StringToListTransformer.php
new file mode 100644
index 00000000..23488d35
--- /dev/null
+++ b/src/Wallabag/CoreBundle/Form/DataTransformer/StringToListTransformer.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace Wallabag\CoreBundle\Form\DataTransformer;
+
+use Doctrine\Common\Persistence\ObjectManager;
+use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
+
+/**
+ * Transforms a comma-separated list to a proper PHP array.
+ * Example: the string "foo, bar" will become the array ["foo", "bar"]
+ */
+class StringToListTransformer implements DataTransformerInterface
+{
+    /**
+     * @var string
+     */
+    private $separator;
+
+    /**
+     * @param string $separator The separator used in the list.
+     */
+    public function __construct($separator = ',')
+    {
+        $this->separator = $separator;
+    }
+
+    /**
+     * Transforms a list to a string.
+     *
+     * @param array|null $list
+     *
+     * @return string
+     */
+    public function transform($list)
+    {
+        if (null === $list) {
+            return '';
+        }
+
+        return implode($this->separator, $list);
+    }
+
+    /**
+     * Transforms a string to a list.
+     *
+     * @param  string $string
+     *
+     * @return array|null
+     */
+    public function reverseTransform($string)
+    {
+        if ($string === null) {
+            return null;
+        }
+
+        return array_values(array_filter(array_map('trim', explode($this->separator, $string))));
+    }
+}