20 files changed, 351 insertions, 77 deletions
diff --git a/composer.json b/composer.json
index f38bb972..0e6ee17d 100644
--- a/composer.json
+++ b/composer.json
@@ -29,6 +29,7 @@
         "symfony/http-foundation": "^3.3",
         "symfony/psr-http-message-bridge": "^1.0",
         "twbs/bootstrap": "^3.3",
+        "twig/twig": "^2.5",
         "zendframework/zend-diactoros": "^1.7"
     },
     "require-dev": {
diff --git a/config/app.php b/config/app.php
index 9af35eb4..13d4d22b 100644
--- a/config/app.php
+++ b/config/app.php
@@ -10,6 +10,7 @@ return [
         \Engelsystem\Config\ConfigServiceProvider::class,
         \Engelsystem\Http\UrlGeneratorServiceProvider::class,
         \Engelsystem\Renderer\RendererServiceProvider::class,
+        \Engelsystem\Renderer\TwigServiceProvider::class,
         \Engelsystem\Database\DatabaseServiceProvider::class,
         \Engelsystem\Http\RequestServiceProvider::class,
         \Engelsystem\Http\SessionServiceProvider::class,
diff --git a/includes/engelsystem.php b/includes/engelsystem.php
index f7d813c5..eb5b220a 100644
--- a/includes/engelsystem.php
+++ b/includes/engelsystem.php
@@ -16,7 +16,7 @@ require __DIR__ . '/includes.php';
  * Check for maintenance
  */
 if ($app->get('config')->get('maintenance')) {
-    echo file_get_contents(__DIR__ . '/../templates/maintenance.html');
+    echo file_get_contents(__DIR__ . '/../templates/layouts/maintenance.html');
     die();
 }
 
diff --git a/includes/pages/guest_credits.php b/includes/pages/guest_credits.php
index db86132d..ecfa8f7c 100644
--- a/includes/pages/guest_credits.php
+++ b/includes/pages/guest_credits.php
@@ -13,5 +13,5 @@ function credits_title()
  */
 function guest_credits()
 {
-    return view(__DIR__ . '/../../templates/guest_credits.html');
+    return view(__DIR__ . '/../../templates/pages/credits.html');
 }
diff --git a/includes/pages/user_shifts.php b/includes/pages/user_shifts.php
index a620d081..67f6785f 100644
--- a/includes/pages/user_shifts.php
+++ b/includes/pages/user_shifts.php
@@ -224,7 +224,7 @@ function view_user_shifts()
     return page([
         div('col-md-12', [
             msg(),
-            view(__DIR__ . '/../../templates/user_shifts.html', [
+            view(__DIR__ . '/../../templates/pages/user-shifts.html', [
                 'title'         => shifts_title(),
                 'room_select'   => make_select($rooms, $shiftsFilter->getRooms(), 'rooms', _('Rooms')),
                 'start_select'  => html_select_key(
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');
 
diff --git a/templates/layout.html b/templates/layout.html
deleted file mode 100644
index 12a91086..00000000
--- a/templates/layout.html
+++ /dev/null
@@ -1,62 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <title>%title% - Engelsystem</title>
-    <meta charset="UTF-8"/>
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <link rel="stylesheet" type="text/css" href="css/theme%theme%.css"/>
-    <link rel="stylesheet" type="text/css" href="vendor/icomoon/style.css"/>
-    <link rel="stylesheet" type="text/css" href="vendor/bootstrap-datepicker-1.7.1/css/bootstrap-datepicker3.min.css"/>
-    <script type="text/javascript" src="vendor/jquery-2.1.1.min.js"></script>
-    <script type="text/javascript" src="vendor/jquery-ui.min.js"></script>
-    %atom_link%
-</head>
-<body>
-<div class="navbar navbar-default navbar-fixed-top">
-    <div class="container-fluid">
-        <div class="navbar-header">
-            <button type="button" class="navbar-toggle collapsed"
-                    data-toggle="collapse" data-target="#navbar-collapse-1">
-                <span class="sr-only">Toggle navigation</span>
-                <span class="icon-bar"></span>
-                <span class="icon-bar"></span>
-                <span class="icon-bar"></span>
-            </button>
-            <a class="navbar-brand" href="%start_page_url%">
-                <span class="icon-icon_angel"></span> <strong class="visible-lg-inline">ENGELSYSTEM</strong>
-            </a>
-        </div>
-        <div class="collapse navbar-collapse" id="navbar-collapse-1">%menu% %header_toolbar%</div>
-    </div>
-</div>
-<div class="container-fluid">
-    <div class="row">%content%</div>
-    <div class="row" id="footer">
-        <div class="col-md-12">
-            <hr/>
-            <div class="text-center footer" style="margin-bottom: 10px;">
-                %event_info%
-                <a href="%faq_url%">FAQ</a>
-                · <a href="%contact_email%"><span class="glyphicon glyphicon-envelope"></span> Contact</a>
-                · <a href="https://github.com/engelsystem/engelsystem/issues">Bugs / Features</a>
-                · <a href="https://github.com/engelsystem/engelsystem/">Development Platform</a>
-                · <a href="%credits_url%">Credits</a>
-            </div>
-        </div>
-    </div>
-</div>
-<script type="text/javascript" src="vendor/bootstrap/js/bootstrap.min.js"></script>
-<script type="text/javascript" src="vendor/bootstrap-datepicker-1.7.1/js/bootstrap-datepicker.min.js"></script>
-<script type="text/javascript" src="vendor/bootstrap-datepicker-1.7.1/locales/bootstrap-datepicker.de.min.js"></script>
-<script type="text/javascript" src="vendor/Chart.min.js"></script>
-<script type="text/javascript" src="js/forms.js"></script>
-<script type="text/javascript" src="vendor/moment-with-locales.min.js"></script>
-<script type="text/javascript">
-    $(function () {
-        moment.locale("%locale%");
-    });
-</script>
-<script type="text/javascript" src="js/moment-countdown.js"></script>
-<script type="text/javascript" src="js/sticky-headers.js"></script>
-</body>
-</html>
diff --git a/templates/layouts/app.twig b/templates/layouts/app.twig
new file mode 100644
index 00000000..6b6bd16f
--- /dev/null
+++ b/templates/layouts/app.twig
@@ -0,0 +1,80 @@
+<!DOCTYPE html>
+<html>
+<head>
+    {% block head %}
+        <title>{% block title %}{{ title }}{% endblock %} - Engelsystem</title>
+        <meta charset="UTF-8"/>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <link rel="stylesheet" type="text/css" href="css/theme{{ theme }}.css"/>
+        <link rel="stylesheet" type="text/css" href="vendor/icomoon/style.css"/>
+        <link rel="stylesheet" type="text/css" href="vendor/bootstrap-datepicker-1.7.1/css/bootstrap-datepicker3.min.css"/>
+        <script type="text/javascript" src="vendor/jquery-2.1.1.min.js"></script>
+        <script type="text/javascript" src="vendor/jquery-ui.min.js"></script>
+        {{ atom_link|raw }}
+    {% endblock %}
+</head>
+<body>
+
+{% block body %}
+    <div class="navbar navbar-default navbar-fixed-top">
+        {% block header %}
+            <div class="container-fluid">
+                <div class="navbar-header">
+                    <button type="button" class="navbar-toggle collapsed"
+                            data-toggle="collapse" data-target="#navbar-collapse-1">
+                        <span class="sr-only">Toggle navigation</span>
+                        <span class="icon-bar"></span>
+                        <span class="icon-bar"></span>
+                        <span class="icon-bar"></span>
+                    </button>
+                    <a class="navbar-brand" href="{{ start_page_url }}">
+                        <span class="icon-icon_angel"></span> <strong class="visible-lg-inline">ENGELSYSTEM</strong>
+                    </a>
+                </div>
+
+                {% block navbar %}
+                    <div class="collapse navbar-collapse"
+                         id="navbar-collapse-1">{{ menu|raw }} {{ header_toolbar|raw }}</div>
+                {% endblock %}
+            </div>
+        {% endblock %}
+    </div>
+
+    <div class="container-fluid">
+        <div class="row">{% block content %}{{ content|raw }}{% endblock %}</div>
+        <div class="row" id="footer">
+            {% block footer %}
+                <div class="col-md-12">
+                    <hr/>
+                    <div class="text-center footer" style="margin-bottom: 10px;">
+                        {% block eventinfo %}
+                            {{ event_info|raw }}
+                        {% endblock %}
+                        <a href="{{ faq_url }}">FAQ</a>
+                        · <a href="{{ contact_email }}"><span class="glyphicon glyphicon-envelope"></span> Contact</a>
+                        · <a href="https://github.com/engelsystem/engelsystem/issues">Bugs / Features</a>
+                        · <a href="https://github.com/engelsystem/engelsystem/">Development Platform</a>
+                        · <a href="{{ credits_url }}">Credits</a>
+                    </div>
+                </div>
+            {% endblock %}
+        </div>
+    </div>
+
+    <script type="text/javascript" src="vendor/bootstrap/js/bootstrap.min.js"></script>
+    <script type="text/javascript" src="vendor/bootstrap-datepicker-1.7.1/js/bootstrap-datepicker.min.js"></script>
+    <script type="text/javascript" src="vendor/bootstrap-datepicker-1.7.1/locales/bootstrap-datepicker.de.min.js"></script>
+    <script type="text/javascript" src="vendor/Chart.min.js"></script>
+    <script type="text/javascript" src="js/forms.js"></script>
+    <script type="text/javascript" src="vendor/moment-with-locales.min.js"></script>
+    <script type="text/javascript">
+        $(function () {
+            moment.locale("{{ locale|escape('js') }}");
+        });
+    </script>
+    <script type="text/javascript" src="js/moment-countdown.js"></script>
+    <script type="text/javascript" src="js/sticky-headers.js"></script>
+{% endblock %}
+
+</body>
+</html>
diff --git a/templates/maintenance.html b/templates/layouts/maintenance.html
index bd73bd74..bd73bd74 100644
--- a/templates/maintenance.html
+++ b/templates/layouts/maintenance.html
diff --git a/templates/guest_credits.html b/templates/pages/credits.html
index db7fac57..4e247113 100644
--- a/templates/guest_credits.html
+++ b/templates/pages/credits.html
@@ -6,15 +6,15 @@
             <p>
                 The original system was written by <a href="https://github.com/cookieBerlin/engelsystem">cookie</a>.
                 It was then completely rewritten and enhanced by
-                <a href="http://notrademark.de/">msquare</a> (maintainer),
-                <a href="http://myigel.name/">MyIgel</a>,
-                <a href="http://mortzu.de/">mortzu</a>,
-                <a href="http://jplitza.de/">jplitza</a> and
-                gnomus.
+                <a href="https://notrademark.de">msquare</a> (maintainer),
+                <a href="https://myigel.name">MyIgel</a>,
+                <a href="https://mortzu.de">mortzu</a>,
+                <a href="https://jplitza.de">jplitza</a> and
+                <a href="https://github.com/gnomus">gnomus</a>.
             </p>
             <p>
-                Please look at the <a href="https://github.com/engelsystem/engelsystem/graphs/contributors">contributor
-                list on github</a> for a more complete version.
+                Please look at the <a href="https://github.com/engelsystem/engelsystem/graphs/contributors">
+                contributor list on github</a> for a more complete version.
             </p>
         </div>
         <div class="col-md-4">
@@ -22,8 +22,8 @@
             <p>
                 Webspace, development platform and domain on <a href="https://engelsystem.de">engelsystem.de</a>
                 is currently provided by <a href="https://www.wybt.net/">would you buy this?</a> (ichdasich)
-                and adminstrated by <a href="http://mortzu.de/">mortzu</a>,
-                <a href="http://derf.homelinux.org/">derf</a> and ichdasich.
+                and adminstrated by <a href="https://mortzu.de">mortzu</a>,
+                <a href="http://derf.homelinux.org">derf</a> and ichdasich.
             </p>
         </div>
         <div class="col-md-4">
diff --git a/templates/user_shifts.html b/templates/pages/user-shifts.html
index e137210c..e137210c 100644
--- a/templates/user_shifts.html
+++ b/templates/pages/user-shifts.html
diff --git a/tests/Unit/ApplicationTest.php b/tests/Unit/ApplicationTest.php
index 866eb957..012226b2 100644
--- a/tests/Unit/ApplicationTest.php
+++ b/tests/Unit/ApplicationTest.php
@@ -48,6 +48,7 @@ class ApplicationTest extends TestCase
         $this->assertTrue($app->has('path'));
         $this->assertTrue($app->has('path.config'));
         $this->assertTrue($app->has('path.lang'));
+        $this->assertTrue($app->has('path.views'));
 
         $this->assertEquals(realpath('.'), $app->path());
         $this->assertEquals(realpath('.') . '/config', $app->get('path.config'));
diff --git a/tests/Unit/Renderer/TwigEngineTest.php b/tests/Unit/Renderer/TwigEngineTest.php
new file mode 100644
index 00000000..9d0618f1
--- /dev/null
+++ b/tests/Unit/Renderer/TwigEngineTest.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Renderer;
+
+use Engelsystem\Renderer\TwigEngine;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+use Twig_Environment as Twig;
+use Twig_LoaderInterface as LoaderInterface;
+
+class TwigEngineTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Renderer\TwigEngine::__construct
+     * @covers \Engelsystem\Renderer\TwigEngine::get
+     */
+    public function testGet()
+    {
+        /** @var Twig|MockObject $twig */
+        $twig = $this->createMock(Twig::class);
+
+        $path = 'foo.twig';
+        $data = ['lorem' => 'ipsum'];
+
+        $twig->expects($this->once())
+            ->method('render')
+            ->with($path, $data)
+            ->willReturn('LoremIpsum!');
+
+        $engine = new TwigEngine($twig);
+        $return = $engine->get($path, $data);
+        $this->assertEquals('LoremIpsum!', $return);
+    }
+
+
+    /**
+     * @covers \Engelsystem\Renderer\TwigEngine::canRender
+     */
+    public function testCanRender()
+    {
+        /** @var Twig|MockObject $twig */
+        $twig = $this->createMock(Twig::class);
+        /** @var LoaderInterface|MockObject $loader */
+        $loader = $this->getMockForAbstractClass(LoaderInterface::class);
+
+        $path = 'foo.twig';
+
+        $twig->expects($this->once())
+            ->method('getLoader')
+            ->willReturn($loader);
+        $loader->expects($this->once())
+            ->method('exists')
+            ->with($path)
+            ->willReturn(true);
+
+        $engine = new TwigEngine($twig);
+        $return = $engine->canRender($path);
+        $this->assertTrue($return);
+    }
+}
diff --git a/tests/Unit/Renderer/TwigLoaderTest.php b/tests/Unit/Renderer/TwigLoaderTest.php
new file mode 100644
index 00000000..e6867643
--- /dev/null
+++ b/tests/Unit/Renderer/TwigLoaderTest.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Renderer;
+
+use Engelsystem\Renderer\TwigLoader;
+use PHPUnit\Framework\TestCase;
+use ReflectionClass as Reflection;
+
+class TwigLoaderTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Renderer\TwigLoader::findTemplate
+     */
+    public function testFindTemplate()
+    {
+        $loader = new TwigLoader();
+
+        $reflection = new Reflection(get_class($loader));
+        $property = $reflection->getProperty('cache');
+        $property->setAccessible(true);
+
+        $realPath = __DIR__ . '/Stub/foo.twig';
+        $property->setValue($loader, ['Stub/foo.twig' => $realPath]);
+
+        $return = $loader->findTemplate('Stub/foo.twig');
+        $this->assertEquals($realPath, $return);
+
+        $return = $loader->findTemplate('Stub/foo');
+        $this->assertEquals($realPath, $return);
+    }
+}
diff --git a/tests/Unit/Renderer/TwigServiceProviderTest.php b/tests/Unit/Renderer/TwigServiceProviderTest.php
new file mode 100644
index 00000000..ede6fae4
--- /dev/null
+++ b/tests/Unit/Renderer/TwigServiceProviderTest.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Renderer;
+
+use Engelsystem\Renderer\TwigEngine;
+use Engelsystem\Renderer\TwigLoader;
+use Engelsystem\Renderer\TwigServiceProvider;
+use Engelsystem\Test\Unit\ServiceProviderTest;
+use PHPUnit\Framework\MockObject\MockObject;
+use Twig_Environment as Twig;
+use Twig_LoaderInterface as TwigLoaderInterface;
+
+class TwigServiceProviderTest extends ServiceProviderTest
+{
+    /**
+     * @covers \Engelsystem\Renderer\TwigServiceProvider::register
+     * @covers \Engelsystem\Renderer\TwigServiceProvider::registerTwigEngine
+     */
+    public function testRegister()
+    {
+        /** @var TwigEngine|MockObject $htmlEngine */
+        $twigEngine = $this->createMock(TwigEngine::class);
+        /** @var TwigLoader|MockObject $twigLoader */
+        $twigLoader = $this->createMock(TwigLoader::class);
+        /** @var Twig|MockObject $twig */
+        $twig = $this->createMock(Twig::class);
+
+        $app = $this->getApp(['make', 'instance', 'tag', 'get']);
+
+        $viewsPath = __DIR__ . '/Stub';
+
+        $app->expects($this->exactly(3))
+            ->method('make')
+            ->withConsecutive(
+                [TwigLoader::class, ['paths' => $viewsPath]],
+                [Twig::class],
+                [TwigEngine::class]
+            )->willReturnOnConsecutiveCalls(
+                $twigLoader,
+                $twig,
+                $twigEngine
+            );
+
+        $app->expects($this->exactly(4))
+            ->method('instance')
+            ->withConsecutive(
+                [TwigLoader::class, $twigLoader],
+                [TwigLoaderInterface::class, $twigLoader],
+                [Twig::class, $twig],
+                ['renderer.twigEngine', $twigEngine]
+            );
+
+        $app->expects($this->once())
+            ->method('get')
+            ->with('path.views')
+            ->willReturn($viewsPath);
+
+        $this->setExpects($app, 'tag', ['renderer.twigEngine', ['renderer.engine']]);
+
+        $serviceProvider = new TwigServiceProvider($app);
+        $serviceProvider->register();
+    }
+}