From bb3d16d273bb3e4552e4869dd22cb2c2d81f5387 Mon Sep 17 00:00:00 2001
From: Igor Scheller <igor.scheller@igorshp.de>
Date: Sun, 26 Aug 2018 02:54:52 +0200
Subject: Added Twig template renderer, closes #338

---
 src/Application.php                  |  1 +
 src/Middleware/LegacyMiddleware.php  |  2 +-
 src/Renderer/TwigEngine.php          | 41 ++++++++++++++++++++++++++++++++++++
 src/Renderer/TwigLoader.php          | 26 +++++++++++++++++++++++
 src/Renderer/TwigServiceProvider.php | 31 +++++++++++++++++++++++++++
 src/helpers.php                      |  4 ++--
 6 files changed, 102 insertions(+), 3 deletions(-)
 create mode 100644 src/Renderer/TwigEngine.php
 create mode 100644 src/Renderer/TwigLoader.php
 create mode 100644 src/Renderer/TwigServiceProvider.php

(limited to 'src')

diff --git a/src/Application.php b/src/Application.php
index 6644a6cf..86397a2c 100644
--- a/src/Application.php
+++ b/src/Application.php
@@ -107,6 +107,7 @@ class Application extends Container
         $this->instance('path', $appPath);
         $this->instance('path.config', $appPath . DIRECTORY_SEPARATOR . 'config');
         $this->instance('path.lang', $appPath . DIRECTORY_SEPARATOR . 'locale');
+        $this->instance('path.views', $appPath . DIRECTORY_SEPARATOR . 'templates');
     }
 
     /**
diff --git a/src/Middleware/LegacyMiddleware.php b/src/Middleware/LegacyMiddleware.php
index 276fb3ee..37ae9331 100644
--- a/src/Middleware/LegacyMiddleware.php
+++ b/src/Middleware/LegacyMiddleware.php
@@ -283,7 +283,7 @@ class LegacyMiddleware implements MiddlewareInterface
             $content = info($content, true);
         }
 
-        return response(view(__DIR__ . '/../../templates/layout.html', [
+        return response(view('layouts/app', [
             'theme'          => isset($user) ? $user['color'] : config('theme'),
             'title'          => $title,
             'atom_link'      => ($page == 'news' || $page == 'user_meetings')
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']);
+    }
+}
diff --git a/src/helpers.php b/src/helpers.php
index a90b2462..336f81fe 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -5,8 +5,8 @@ use Engelsystem\Application;
 use Engelsystem\Config\Config;
 use Engelsystem\Http\Request;
 use Engelsystem\Http\Response;
-use Engelsystem\Renderer\Renderer;
 use Engelsystem\Http\UrlGenerator;
+use Engelsystem\Renderer\Renderer;
 use Symfony\Component\HttpFoundation\Session\SessionInterface;
 
 /**
@@ -139,7 +139,7 @@ function url($path = null, $parameters = [])
  * @param mixed[] $data
  * @return Renderer|string
  */
-function view($template = null, $data = null)
+function view($template = null, $data = [])
 {
     $renderer = app('renderer');
 
-- 
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