Add implementation for MjmlPhp (fixes #107)

README.md

@@ -57,7 +57,7 @@ class AppKernel extends Kernel
 
 ## Renderer
 
-For the moment only one renderer is available, the binary renderer.
+Choose from one of two renderers, the binary renderer and mjml-php.
 
 ### Binary
 
@@ -82,6 +82,19 @@ mjml:
 
 The `node` option is there for those who have problems with `$PATH`, see [#35](https://github.com/notFloran/mjml-bundle/issues/35).
 
+### mjml-php
+
+Install [mjml-php](https://github.com/alekitto/mjml-php), a PHP extension that embeds [MRML](https://github.com/jdrouet/mrml), 
+the MJML rendering engine written in Rust, so that you can render MJML templates directly from PHP without shelling out to a CLI tool. 
+
+Then you need to update the configuration:
+
+```yaml
+# config/packages/mjml.yaml
+mjml:
+  renderer: mjml_php
+```
+
 ### Custom
 
 First you must create a class which implements `NotFloran\MjmlBundle\Renderer\RendererInterface`, then declare it as a service.

src/DependencyInjection/MjmlExtension.php

@@ -3,6 +3,7 @@
 namespace NotFloran\MjmlBundle\DependencyInjection;
 
 use NotFloran\MjmlBundle\Renderer\BinaryRenderer;
+use NotFloran\MjmlBundle\Renderer\MjmlPhpRenderer;
 use NotFloran\MjmlBundle\Renderer\RendererInterface;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
@@ -31,6 +32,10 @@ public function load(array $configs, ContainerBuilder $container): void
             $rendererDefinition->addArgument($config['options']['mjml_version']);
             $container->setDefinition($rendererDefinition->getClass(), $rendererDefinition);
             $rendererServiceId = $rendererDefinition->getClass();
+        } elseif ('mjml_php' === $config['renderer']) {
+            $rendererDefinition = new Definition(MjmlPhpRenderer::class);
+            $container->setDefinition($rendererDefinition->getClass(), $rendererDefinition);
+            $rendererServiceId = $rendererDefinition->getClass();
         } elseif ('service' === $config['renderer']) {
             $rendererServiceId = $config['options']['service_id'];
         } else {

src/Renderer/MjmlPhpRenderer.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace NotFloran\MjmlBundle\Renderer;
+
+use Mjml\Mjml;
+use Mjml\Exception\RenderException;
+
+final class MjmlPhpRenderer implements RendererInterface
+{
+    public function render(string $mjmlContent): string
+    {
+        try {
+            $mjml = new Mjml(['disable_comments' => true]);
+
+            $result = $mjml->render($mjmlContent);
+
+            return $result->getBody();
+        } catch (RenderException $e) {
+            throw new \RuntimeException('MJML rendering exception: '.$e->getMessage(), 0, $e);
+        }
+    }
+}