Added Twig template renderer, closes #338

3 files changed, 98 insertions, 0 deletions

diff --git a/src/Renderer/TwigEngine.php b/src/Renderer/TwigEngine.php
new file mode 100644
index 00000000..55a2e299
--- /dev/null
+++ b/src/Renderer/TwigEngine.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace Engelsystem\Renderer;
+
+use Twig_Environment as Twig;
+use Twig_Error_Loader as LoaderError;
+use Twig_Error_Runtime as RuntimeError;
+use Twig_Error_Syntax as SyntaxError;
+
+class TwigEngine implements EngineInterface
+{
+    /** @var Twig */
+    protected $twig;
+
+    public function __construct(Twig $twig)
+    {
+        $this->twig = $twig;
+    }
+
+    /**
+     * Render a twig template
+     *
+     * @param string $path
+     * @param array  $data
+     * @return string
+     * @throws LoaderError|RuntimeError|SyntaxError
+     */
+    public function get($path, $data = [])
+    {
+        return $this->twig->render($path, $data);
+    }
+
+    /**
+     * @param string $path
+     * @return bool
+     */
+    public function canRender($path)
+    {
+        return $this->twig->getLoader()->exists($path);
+    }
+}
diff --git a/src/Renderer/TwigLoader.php b/src/Renderer/TwigLoader.php
new file mode 100644
index 00000000..154e6dbb
--- /dev/null
+++ b/src/Renderer/TwigLoader.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace Engelsystem\Renderer;
+
+use Twig_Error_Loader;
+use Twig_Loader_Filesystem as FilesystemLoader;
+
+class TwigLoader extends FilesystemLoader
+{
+    /**
+     * @param string $name
+     * @param bool   $throw
+     * @return false|string
+     * @throws Twig_Error_Loader
+     */
+    public function findTemplate($name, $throw = true)
+    {
+        $extension = '.twig';
+        $extensionLength = strlen($extension);
+        if (substr($name, -$extensionLength, $extensionLength) !== $extension) {
+            $name .= $extension;
+        }
+
+        return parent::findTemplate($name, $throw);
+    }
+}
diff --git a/src/Renderer/TwigServiceProvider.php b/src/Renderer/TwigServiceProvider.php
new file mode 100644
index 00000000..23810863
--- /dev/null
+++ b/src/Renderer/TwigServiceProvider.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Engelsystem\Renderer;
+
+use Engelsystem\Container\ServiceProvider;
+use Twig_Environment as Twig;
+use Twig_LoaderInterface as TwigLoaderInterface;
+
+class TwigServiceProvider extends ServiceProvider
+{
+    public function register()
+    {
+        $this->registerTwigEngine();
+    }
+
+    protected function registerTwigEngine()
+    {
+        $viewsPath = $this->app->get('path.views');
+
+        $twigLoader = $this->app->make(TwigLoader::class, ['paths' => $viewsPath]);
+        $this->app->instance(TwigLoader::class, $twigLoader);
+        $this->app->instance(TwigLoaderInterface::class, $twigLoader);
+
+        $twig = $this->app->make(Twig::class);
+        $this->app->instance(Twig::class, $twig);
+
+        $twigEngine = $this->app->make(TwigEngine::class);
+        $this->app->instance('renderer.twigEngine', $twigEngine);
+        $this->app->tag('renderer.twigEngine', ['renderer.engine']);
+    }
+}