Flextype Core: Markdown parser #212 #186

- Add Markdown service

flextype/twig/MarkdownTwigExtension.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Flextype (http://flextype.org)
+ * Founded by Sergey Romanenko and maintained by Flextype Community.
+ */
+
+namespace Flextype;
+
+use Twig_Extension;
+use Twig_SimpleFilter;
+
+class MarkdownTwigExtension extends Twig_Extension
+{
+    /**
+     * Flextype Dependency Container
+     */
+    private $flextype;
+
+    /**
+     * Constructor
+     */
+    public function __construct($flextype)
+    {
+        $this->flextype = $flextype;
+    }
+
+    /**
+     * Returns a list of filters to add to the existing list.
+     *
+     * @return array
+     */
+    public function getFilters() : array
+    {
+        return [
+            new Twig_SimpleFilter('markdown', [$this, 'markdown']),
+        ];
+    }
+
+    /**
+     * Markdown process
+     */
+    public function markdown($value) : string
+    {
+        if ($value !== null) {
+            return $this->flextype->markdown->text($value);
+        }
+
+        return '';
+    }
+}