reimport

.gitignore

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+/vendor/
+.idea
+composer.lock

composer.json

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+{
+  "name": "bitcommunism/twig",
+  "license": "MIT",
+  "require": {
+    "twig/twig": "^2.4",
+    "php-di/php-di": "^5.4"
+  },
+  "autoload": {
+    "psr-4": {
+      "BitCommunism\\Twig\\": "src/"
+    }
+  }
+}

config/default.php

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+<?php
+
+namespace BitCommunism\Twig;
+
+
+use DI\Container;
+use function DI\add;
+use function DI\factory;
+use function DI\get;
+use function DI\object;
+use function DI\string;
+
+return [
+    'twig.paths' => add([
+        string('{basedir}/templates'),
+        __DIR__ . '/../templates',
+    ]),
+
+    'twig.filtered_paths' => factory(function (Container $c) {
+        $paths = $c->get('twig.paths');
+        return array_filter($paths, 'is_dir');
+    }),
+
+    'twig.loader' => get(\Twig_Loader_Filesystem::class),
+    'twig.debug' => false,
+    'twig' => get(\Twig_Environment::class),
+
+    \Twig_Loader_Filesystem::class => object(\Twig_Loader_Filesystem::class)
+        ->constructorParameter('paths', get('twig.filtered_paths')),
+
+    \Twig_LoaderInterface::class => get('twig.loader'),
+];

config/development.php

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+<?php
+
+return [
+    'twig.debug' => true,
+];

src/Handler/Twig.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: eater
+ * Date: 1/16/18
+ * Time: 5:25 PM
+ */
+
+namespace BitCommunism\Twig\Handler;
+
+
+use BitCommunism\Http\Handler;
+use BitCommunism\Twig\Psr7\TwigStream;
+use DI\Container;
+use Twig\Environment;
+
+class Twig extends Handler
+{
+    protected $environment;
+    protected $templateVariables = [];
+
+    public function __construct(Environment $environment, Container $container)
+    {
+        $this->environment = $environment;
+        parent::__construct($container);
+    }
+
+    public function setTemplateVariable($key, $value) {
+        $this->templateVariables[$key] = $value;
+    }
+
+    public function appendTemplateVariables($variables) {
+        $this->templateVariables = array_merge($this->templateVariables, $variables);
+    }
+
+    public function template($template, $variables) {
+        $stream = new TwigStream($this->environment);
+        $stream->setTemplate($template);
+        $stream->appendVariables($this->templateVariables);
+        $stream->appendVariables($variables);
+
+        return $stream;
+    }
+}

src/Psr7/TwigStream.php

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+<?php
+
+namespace BitCommunism\Twig\Psr7;
+
+use GuzzleHttp\Psr7\Stream;
+use function GuzzleHttp\Psr7\stream_for;
+use GuzzleHttp\Psr7\StreamDecoratorTrait;
+use Psr\Http\Message\StreamInterface;
+use Twig\Environment;
+
+/** @var $stream Stream */
+class TwigStream implements StreamInterface
+{
+    use StreamDecoratorTrait;
+
+    private $environment;
+    private $template;
+    private $variables = [];
+
+    public function __construct(Environment $environment)
+    {
+        $this->environment = $environment;
+    }
+
+    public function setTemplate($template)
+    {
+        $this->template = $template;
+        $this->resetStream();
+    }
+
+    public function setVariable($name, $value) {
+        $this->variables[$name] = $value;
+        $this->resetStream();
+    }
+
+    public function appendVariables($arr) {
+        $this->variables = array_merge($this->variables, $arr);
+        $this->resetStream();
+    }
+
+    public function isWritable()
+    {
+        return false;
+    }
+
+    private function resetStream() {
+        if (!$this->stream) {
+            return;
+        }
+
+        $this->stream->close();
+        unset($this->stream);
+    }
+
+    public function createStream() {
+        $data = $this->environment->render($this->template, $this->variables);
+        $stream = stream_for(fopen('php://memory', 'w+'));
+        $stream->write($data);
+        $stream->rewind();
+
+        return $stream;
+    }
+}