Initial commit.

README.txt

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+-- SUMMARY --
+
+Twig Tweak module provides developers a Twig extension with some addition
+functions and filters.
+
+See src/TwigExtension.php for details.

src/TwigExtension.php

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+<?php
+
+/**
+ * @file
+ * Contains Drupal\twig_tweak\TwigExtension.
+ */
+
+namespace Drupal\twig_tweak;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\block\Entity\Block;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Utility\Token;
+
+/**
+ * A class providing Twig extension with some useful functions and filters.
+ */
+class TwigExtension extends \Twig_Extension {
+
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * The token service.
+   *
+   * @var \Drupal\Core\Utility\Token
+   */
+  protected $token;
+
+  /**
+   * The configuration factory.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $configFactory;
+
+  /**
+   * TwigExtension constructor.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The entity type manager.
+   * @param \Drupal\Core\Utility\Token $token
+   *   The token service.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The configuration factory.
+   */
+  public function __construct(EntityTypeManagerInterface $entity_type_manager, Token $token, ConfigFactoryInterface $config_factory) {
+    $this->blockBuilder = \Drupal::entityTypeManager()
+      ->getViewBuilder('block');
+
+    $this->entityTypeManager = $entity_type_manager;
+    $this->token = $token;
+    $this->configFactory = $config_factory;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFunctions() {
+    return [
+      new \Twig_SimpleFunction('drupal_view', [$this, 'drupalView']),
+      new \Twig_SimpleFunction('drupal_block', [$this, 'drupalBlock']),
+      new \Twig_SimpleFunction('drupal_token', [$this, 'drupalToken']),
+      new \Twig_SimpleFunction('drupal_entity', [$this, 'drupalEntity']),
+      new \Twig_SimpleFunction('drupal_config', [$this, 'drupalConfig'])
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFilters() {
+    return [
+      new \Twig_SimpleFilter('php', [$this, 'phpFilter']),
+      new \Twig_SimpleFilter('token_replace', [$this, 'tokenReplaceFilter']),
+      new \Twig_SimpleFilter('preg_replace', [$this, 'pregPeplaceFilter']),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getName() {
+    return 'twig_tweak';
+  }
+
+  /**
+   * Embeds a view.
+   */
+  public function drupalView($name, $display_id = 'default') {
+    $args = func_get_args();
+    return views_embed_view(
+      $name,
+      $display_id,
+      isset($args[2]) ? $args[2] : NULL,
+      isset($args[3]) ? $args[3] : NULL,
+      isset($args[4]) ? $args[2] : NULL
+    );
+  }
+
+  /**
+   * Builds the render array for the provided block.
+   */
+  public function drupalBlock($id) {
+    $block = Block::load($id);
+    return $this->entityTypeManager->getViewBuilder('block')->view($block);
+  }
+
+  /**
+   * Replaces a given tokens with appropriate value.
+   */
+  public function drupalToken($token) {
+    return $this->token->replace("[$token]");
+  }
+
+  /**
+   * Returns the render array for an entity.
+   */
+  public function drupalEntity($entity_type, $id, $view_mode = NULL, $langcode = NULL) {
+    $entity = $this->entityTypeManager->getStorage($entity_type)->load($id);
+    $render_controller = $this->entityTypeManager->getViewBuilder($entity->getEntityTypeId());
+    return $render_controller->view($entity, $view_mode, $langcode);
+  }
+
+  /**
+   * Gets data from this configuration.
+   */
+  public function drupalConfig($name, $key) {
+    return $this->configFactory->get($name)->get($key);
+  }
+
+  /**
+   * Evaluates a string of PHP code.
+   */
+  public function phpFilter($code) {
+    ob_start();
+    print eval($code);
+    $output = ob_get_contents();
+    ob_end_clean();
+    return $output;
+  }
+
+  /**
+   * Replaces all tokens in a given string with appropriate values.
+   */
+  public function tokenReplaceFilter($text) {
+    return $this->token->replace($text);
+  }
+
+  /**
+   * Performs a regular expression search and replace.
+   */
+  public function pregPeplaceFilter($text, $pattern, $replacement) {
+    return preg_replace('/' . preg_quote($pattern, '/') . '/', $replacement, $text);
+  }
+
+}

twig_tweak.info.yml

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+name: Twig tweak
+type: module
+description: Provides some extra twig functions.
+package: custom
+version: 8.x-1.0-dev
+core: 8.x

twig_tweak.services.yml

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+services:
+  twig_tweak.twig_extension:
+    class: Drupal\twig_tweak\TwigExtension
+    arguments: ['@entity_type.manager', '@token', '@config.factory']
+    tags:
+      - { name: twig.extension }