Add Twig extension

Author: DieterHolvoet

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.6.0] - 2020-07-23
+### Added
+- Add Twig extension
+
 ## [0.5.0] - 2020-07-23
 ### Removed
 - Remove hook_event_dispatcher dependency

src/Twig/Extension/SettingExtension.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Drupal\wmsettings\Twig\Extension;
+
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Render\RendererInterface;
+use Drupal\wmsettings\Service\WmSettings;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class SettingExtension extends AbstractExtension
+{
+    /** @var RendererInterface */
+    protected $renderer;
+    /** @var WmSettings */
+    protected $wmSettings;
+
+    public function __construct(
+        RendererInterface $renderer,
+        WmSettings $wmSettings
+    ) {
+        $this->renderer = $renderer;
+        $this->wmSettings = $wmSettings;
+    }
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction('setting', [$this, 'getSetting']),
+        ];
+    }
+
+    public function getSetting($bundle)
+    {
+        $entity = $this->wmSettings->read($bundle);
+
+        // Workaround to include caching metadata of the settings entity
+        if ($entity instanceof EntityInterface) {
+            $build = [];
+            CacheableMetadata::createFromObject($entity)
+                ->applyTo($build);
+            $this->renderer->render($build);
+        }
+
+        return $entity;
+    }
+}

wmsettings.services.yml

@@ -20,3 +20,10 @@ services:
         class: Drupal\wmsettings\EventSubscriber\SettingsSubscriber
         arguments:
             - '@cache_tags.invalidator'
+
+    wmsettings.twig_extension:
+        class: Drupal\wmsettings\Twig\Extension\SettingExtension
+        tags: ['twig.extension']
+        arguments:
+            - '@renderer'
+            - '@wmsettings.settings'