Enclosure view helper

Classes/ViewHelpers/Item/EnclosureViewHelper.php

@@ -0,0 +1,53 @@
+<?php
+namespace Fab\RssDisplay\ViewHelpers\Item;
+
+/*
+ * This file is part of the Fab/RssDisplay project under GPLv2 or later.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.md file that was distributed with this source code.
+ */
+
+use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+/**
+ * A View Helper which returns the enclosure of a SimplePie item.
+ */
+class EnclosureViewHelper extends AbstractViewHelper
+{
+    /**
+     * Retrieve the SimplePie item from the context and return its enclosure data.
+     *
+     * @param string $attribute The attribute to retrieve. Must be either "url", "length" or "type".
+     * @param int $key The enclosure that you want to return. Remember that arrays begin with 0, not 1.
+     * @return null|string Returns null, if no enclosure can be found or the attribute data requested.
+     * @throws \InvalidArgumentException
+     */
+    public function render($attribute, $key = 0)
+    {
+        if (!in_array($attribute, ['url', 'length', 'type'], true)) {
+            $message = sprintf('Attribute "%s" is no valid enclosure attribute.', $attribute);
+            throw new \InvalidArgumentException($message, 1500032671);
+        }
+
+        /** @var SimplePie_Item $item */
+        $item = $this->templateVariableContainer->get('item');
+        /** @var SimplePie_Enclosure $enclosure */
+        $enclosure = $item->get_enclosure($key);
+
+        if ($enclosure) {
+            switch ($attribute) {
+                case 'url':
+                    return $enclosure->get_link();
+                case 'length':
+                    return $enclosure->get_length();
+                case 'type':
+                    return $enclosure->get_type();
+                default:
+                    return null;
+            }
+        }
+
+        return null;
+    }
+}

README.rst

@@ -124,6 +124,9 @@ View Helpers
 RSS Display has various View Helpers to interact with a SimplePie object which provides an `API`_ for fetching data from a feed item.
 Some advanced View Helpers are explains below ::
 
+	# Retrieve url of enclosed image
+	<feed:item.enclosure attribute="url"/>
+
 	# Retrieve a custom value from the item "author". See the API http://simplepie.org/wiki/reference/start#methods1
 	<feed:item.get value="author"/>