pm-4.1.x-dev/src/Service/PmKey.php

<?php

declare(strict_types=1);

namespace Drupal\pm\Service;

use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
use Drupal\Core\KeyValueStore\KeyValueStoreInterface;
use Drupal\pm\PmContentEntityBase;

/**
 * @todo Add class description.
 */
final class PmKey implements PmKeyInterface {

  /**
   * The key-value storage.
   */
  private readonly KeyValueStoreInterface $storage;

  /**
   * Constructs a PmKey object.
   */
  public function __construct(
    private readonly KeyValueFactoryInterface $keyValueFactory,
  ) {
    $this->storage = $keyValueFactory->get('pm_key');
  }

  /**
   * {@inheritdoc}
   */
  public function generateNextKey(string $prefix): string {
    $current_key = $this->storage->get($prefix);
    if (empty($current_key)) {
      $current_key = 0;
    }
    $next_key = $current_key + 1;
    $this->storage->set($prefix, $next_key);
    return $prefix . '-' . $next_key;
  }

  /**
   * {@inheritdoc}
   */
  public function handleEntityPresave(\Drupal\Core\Entity\EntityInterface $entity): void {
    if (!$entity instanceof PmContentEntityBase) {
      return;
    }
    if (!($entity->hasField('pm_key') && $entity->hasField('pm_project'))) {
      return ;
    }
    $current_key = $entity->get('pm_key')->value;
    $project = $entity->get('pm_project')->entity;
    $project_key = trim($project->get('project_key')->value ?? '') ;
    if ($current_key && str_starts_with($current_key, $project_key . '-')) {
      // Bail out if current key is already following valid pattern.
      return ;
    }
    $next_key = $this->generateNextKey($project_key);
    $entity->set('pm_key', $next_key);
  }


}