Current store context.

CurrentStoreContext.php

<?php

namespace Drupal\customize_commerce\ContextProvider;

use Drupal\commerce_store\CurrentStoreInterface;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Plugin\Context\Context;
use Drupal\Core\Plugin\Context\ContextDefinition;
use Drupal\Core\Plugin\Context\ContextProviderInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;

/**
 * Sets the current store as a context.
 */
class CurrentStoreContext implements ContextProviderInterface {

  use StringTranslationTrait;

  /**
   * The current store service.
   *
   * @var \Drupal\commerce_store\CurrentStoreInterface
   */
  protected $currentStore;

  /**
   * Construct a new CurrentStoreContext.
   *
   * @param \Drupal\commerce_store\CurrentStoreInterface $current_store
   *   The current store service.
   */
  public function __construct(CurrentStoreInterface $current_store) {
    $this->currentStore = $current_store;
  }

  /**
   * {@inheritdoc}
   */
  public function getRuntimeContexts(array $unqualified_context_ids) {
    $current_store = $this->currentStore->getStore();

    $context = new Context(new ContextDefinition('entity:commerce_store', $this->t('Current store')), $current_store);
    $cacheability = new CacheableMetadata();
    $cacheability->setCacheContexts(['store']);
    $context->addCacheableDependency($cacheability);

    $result = [
      'current_store' => $context,
    ];

    return $result;
  }

  /**
   * {@inheritdoc}
   */
  public function getAvailableContexts() {
    return $this->getRuntimeContexts([]);
  }

}