Revert removing Sundown

DependencyInjection/Configuration.php

@@ -26,6 +26,37 @@ class Configuration implements ConfigurationInterface
                         ->scalarNode('service')->cannotBeEmpty()->defaultValue('markdown.parser.max')->end()
                     ->end()
                 ->end()
+                ->arrayNode('sundown')
+                    ->addDefaultsIfNotSet()
+                    ->children()
+                        ->arrayNode('extensions')
+                            ->addDefaultsIfNotSet()
+                            ->children()
+                                ->booleanNode('fenced_code_blocks')->defaultFalse()->end()
+                                ->booleanNode('no_intra_emphasis')->defaultFalse()->end()
+                                ->booleanNode('tables')->defaultFalse()->end()
+                                ->booleanNode('autolink')->defaultFalse()->end()
+                                ->booleanNode('strikethrough')->defaultFalse()->end()
+                                ->booleanNode('lax_html_blocks')->defaultFalse()->end()
+                                ->booleanNode('space_after_headers')->defaultFalse()->end()
+                                ->booleanNode('superscript')->defaultFalse()->end()
+                            ->end()
+                        ->end()
+                        ->arrayNode('render_flags')
+                            ->addDefaultsIfNotSet()
+                            ->children()
+                                ->booleanNode('filter_html')->defaultFalse()->end()
+                                ->booleanNode('no_images')->defaultFalse()->end()
+                                ->booleanNode('no_links')->defaultFalse()->end()
+                                ->booleanNode('no_styles')->defaultFalse()->end()
+                                ->booleanNode('safe_links_only')->defaultFalse()->end()
+                                ->booleanNode('with_toc_data')->defaultFalse()->end()
+                                ->booleanNode('hard_wrap')->defaultFalse()->end()
+                                ->booleanNode('xhtml')->defaultFalse()->end()
+                            ->end()
+                        ->end()
+                    ->end()
+                ->end()
             ->end()
         ->end();
 

Parser/SundownParser.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Knp\Bundle\MarkdownBundle\Parser;
+
+use Knp\Bundle\MarkdownBundle\MarkdownParserInterface;
+
+use Sundown\Markdown;
+
+/**
+ * SundownParser
+ *
+ * This class wraps the original Sundown parser to implement the KnpMardownBundle interface
+ */
+class SundownParser implements MarkdownParserInterface
+{
+    private $parser;
+
+    public function __construct(Markdown $parser)
+    {
+        $this->parser = $parser;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function transformMarkdown($text)
+    {
+        return $this->parser->render($text);
+    }
+}

Resources/config/sundown.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" ?>
+<container xmlns="http://symfony.com/schema/dic/services"
+           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+           xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
+
+    <parameters>
+        <parameter key="markdown.parser.sundown.class">Knp\Bundle\MarkdownBundle\Parser\SundownParser</parameter>
+        <parameter key="markdown.sundown.base_parser.class">Sundown\Markdown</parameter>
+        <parameter key="markdown.sundown.renderer.class">Sundown\Render\HTML</parameter>
+    </parameters>
+
+    <services>
+        <service id="markdown.parser.sundown" class="%markdown.parser.sundown.class%" public="false">
+            <argument type="service" id="markdown.sundown.base_parser" />
+        </service>
+
+        <service id="markdown.sundown.base_parser" public="false" class="%markdown.sundown.base_parser.class%">
+            <argument type="service" id="markdown.sundown.renderer" />
+            <argument>%markdown.sundown.extensions%</argument>
+        </service>
+
+        <service id="markdown.sundown.renderer" public="false" class="%markdown.sundown.renderer.class%">
+            <argument>%markdown.sundown.render_flags%</argument>
+        </service>
+    </services>
+</container>

composer.json

@@ -31,7 +31,8 @@
         "phpstan/phpstan-symfony": "^1.0"
     },
     "suggest": {
-        "symfony/twig-bundle": "to use the Twig markdown filter"
+        "symfony/twig-bundle": "to use the Twig markdown filter",
+        "ext-sundown": "to use optional support for php-sundown extension instead of php implementation"
     },
 
     "extra": {