/**
* Selects the store for the given purchasable entity.
*
* If the entity is sold from one store, then that store is selected.
* If the entity is sold from multiple stores, and the current store is
* one of them, then that store is selected.
*
* @param \Drupal\commerce\PurchasableEntityInterface $entity
* The entity being added to cart.
*
* @throws \Exception
* When the entity can't be purchased from the current store.
*
* @return \Drupal\commerce_store\Entity\StoreInterface
* The selected store.
*/
protected function selectStore(PurchasableEntityInterface $entity)
{
// @todo Add getStores() to the PurchasableEntityInterface.
$stores = $entity->getProduct()->getStores();
if (count($stores) === 1) {
$store = reset($stores);
} else {
$store = $this->storeContext->getStore();
if (!in_array($store, $stores)) {
// Indicates that the site listings are not filtered properly.
throw new \Exception("The given entity can't be purchased from the current store.");
}
}
return $store;
}