Issue #3493300 by zaporylie: Import currency with a config action

Closes #3493300

modules/price/src/Plugin/ConfigAction/CurrencyImport.php

+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\commerce_price\Plugin\ConfigAction;
+
+use Drupal\commerce_price\CurrencyImporterInterface;
+use Drupal\Core\Config\Action\Attribute\ConfigAction;
+use Drupal\Core\Config\Action\ConfigActionPluginInterface;
+use Drupal\Core\Config\Action\Exists;
+use Drupal\Core\Config\ConfigManagerInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * @internal
+ *   This API is experimental.
+ */
+#[ConfigAction(
+  id: 'currencyImport',
+  admin_label: new TranslatableMarkup('Import currency from repository'),
+  entity_types: ['commerce_currency'],
+)]
+final class CurrencyImport implements ConfigActionPluginInterface, ContainerFactoryPluginInterface {
+
+  /**
+   * Constructs a CurrencyImport object.
+   *
+   * @param \Drupal\Core\Config\ConfigManagerInterface $configManager
+   *   The config manager.
+   * @param \Drupal\commerce_price\CurrencyImporterInterface $currencyImporter
+   *   The currency importer.
+   * @param \Drupal\Core\Config\Action\Exists $exists
+   *   Determines behavior of action depending on entity existence.
+   */
+  public function __construct(
+    protected readonly ConfigManagerInterface $configManager,
+    protected readonly CurrencyImporterInterface $currencyImporter,
+    protected readonly Exists $exists,
+  ) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition): static {
+    return new static(
+      $container->get('config.manager'),
+      $container->get('commerce_price.currency_importer'),
+      Exists::ReturnEarlyIfExists,
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function apply(string $configName, mixed $value): void {
+    /** @var \Drupal\Core\Config\Entity\ConfigEntityInterface|null $entity */
+    $entity = $this->configManager->loadConfigEntityByName(str_replace('XYZ', $value, $configName));
+    if ($this->exists->returnEarly($configName, $entity)) {
+      return;
+    }
+    $this->currencyImporter->import($value);
+  }
+
+}