1 files changed, 132 insertions, 0 deletions
diff --git a/3rdparty/fguillot/picofeed/lib/PicoFeed/Serialization/Export.php b/3rdparty/fguillot/picofeed/lib/PicoFeed/Serialization/Export.php
new file mode 100644
index 000000000..4a3b978fa
--- /dev/null
+++ b/3rdparty/fguillot/picofeed/lib/PicoFeed/Serialization/Export.php
@@ -0,0 +1,132 @@
+<?php
+
+namespace PicoFeed\Serialization;
+
+use SimpleXMLElement;
+
+/**
+ * OPML export class
+ *
+ * @author  Frederic Guillot
+ * @package Serialization
+ */
+class Export
+{
+    /**
+     * List of feeds to exports
+     *
+     * @access private
+     * @var array
+     */
+    private $content = array();
+
+    /**
+     * List of required properties for each feed
+     *
+     * @access private
+     * @var array
+     */
+    private $required_fields = array(
+        'title',
+        'site_url',
+        'feed_url',
+    );
+
+    /**
+     * Constructor
+     *
+     * @access public
+     * @param  array   $content   List of feeds
+     */
+    public function __construct(array $content)
+    {
+        $this->content = $content;
+    }
+
+    /**
+     * Get the OPML document
+     *
+     * @access public
+     * @return string
+     */
+    public function execute()
+    {
+        $xml = new SimpleXMLElement('<?xml version="1.0" encoding="utf-8"?><opml/>');
+
+        $head = $xml->addChild('head');
+        $head->addChild('title', 'OPML Export');
+
+        $body = $xml->addChild('body');
+
+        foreach ($this->content as $category => $values) {
+
+            if (is_string($category)) {
+                $this->createCategory($body, $category, $values);
+            }
+            else {
+                $this->createEntry($body, $values);
+            }
+        }
+
+        return $xml->asXML();
+    }
+
+    /**
+     * Create a feed entry
+     *
+     * @access public
+     * @param  SimpleXMLElement    $parent      Parent Element
+     * @param  array               $feed        Feed properties
+     */
+    public function createEntry(SimpleXMLElement $parent, array $feed)
+    {
+        $valid = true;
+
+        foreach ($this->required_fields as $field) {
+            if (! isset($feed[$field])) {
+                $valid = false;
+                break;
+            }
+        }
+
+        if ($valid) {
+            $outline = $parent->addChild('outline');
+            $outline->addAttribute('xmlUrl', $feed['feed_url']);
+            $outline->addAttribute('htmlUrl', $feed['site_url']);
+            $outline->addAttribute('title', $feed['title']);
+            $outline->addAttribute('text', $feed['title']);
+            $outline->addAttribute('description', isset($feed['description']) ? $feed['description'] : $feed['title']);
+            $outline->addAttribute('type', 'rss');
+            $outline->addAttribute('version', 'RSS');
+        }
+    }
+
+    /**
+     * Create entries for a feed list
+     *
+     * @access public
+     * @param  SimpleXMLElement    $parent      Parent Element
+     * @param  array               $feeds       Feed list
+     */
+    public function createEntries(SimpleXMLElement $parent, array $feeds)
+    {
+        foreach ($feeds as $feed) {
+            $this->createEntry($parent, $feed);
+        }
+    }
+
+    /**
+     * Create a category entry
+     *
+     * @access public
+     * @param  SimpleXMLElement    $parent      Parent Element
+     * @param  string              $category    Category
+     * @param  array               $feed        Feed properties
+     */
+    public function createCategory(SimpleXMLElement $parent, $category, array $feeds)
+    {
+        $outline = $parent->addChild('outline');
+        $outline->addAttribute('text', $category);
+        $this->createEntries($outline, $feeds);
+    }
+}