PirateDayCacheabilityMetadataConfigOverride.php

<?php

namespace Drupal\config_override_test;

use Drupal\config_override_test\Cache\PirateDayCacheContext;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Config\ConfigFactoryOverrideInterface;
use Drupal\Core\Config\StorageInterface;

/**
 * Test implementation of a config override that provides cacheability metadata.
 */
class PirateDayCacheabilityMetadataConfigOverride implements ConfigFactoryOverrideInterface {
  
  /**
   * {@inheritdoc}
   */
  public function loadOverrides($names) {
    $overrides = [];
    // Override the theme and the 'call_to_action' block on Pirate Day.
    if (PirateDayCacheContext::isPirateDay()) {
      if (in_array('system.theme', $names)) {
        $overrides = $overrides + [
          'system.theme' => [
            'default' => 'pirate',
          ],
        ];
      }
      if (in_array('block.block.call_to_action', $names)) {
        $overrides = $overrides + [
          'block.block.call_to_action' => [
            'settings' => [
              'label' => 'Draw yer cutlasses!',
            ],
          ],
        ];
      }
    }
    return $overrides;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCacheSuffix() {
    return 'PirateDayConfigOverrider';
  }
  
  /**
   * {@inheritdoc}
   */
  public function createConfigObject($name, $collection = StorageInterface::DEFAULT_COLLECTION) {
    return NULL;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCacheableMetadata($name) {
    $metadata = new CacheableMetadata();
    $metadata->setCacheContexts([
      'pirate_day',
    ])
      ->setCacheTags([
      'pirate-day-tag',
    ])
      ->setCacheMaxAge(PirateDayCacheContext::PIRATE_DAY_MAX_AGE);
    return $metadata;
  }

}