Storage::getStorage

static function getStorage()
{
	static $storage;

	if (!is_null($storage))
	{
		return $storage;
	}

	$storage = false;

	if (!MainLoader::includeModule('disk'))
	{
		return $storage;
	}

	$storageId = MainConfigOption::get('mail', 'disk_attachment_storage_id', 0);
	if ($storageId > 0)
	{
		$storage = BitrixDiskStorage::loadById($storageId);
		if (!$storage || $storage->getModuleId() != 'mail')
		{
			$storage = false;
		}
	}

	if (!$storage)
	{
		$driver = BitrixDiskDriver::getInstance();

		$storage = $driver->addStorageIfNotExist(array(
			'NAME' => Loc::getMessage('MAIL_ATTACHMENT_STORAGE_NAME'),
			'USE_INTERNAL_RIGHTS' => false,
			'MODULE_ID' => 'mail',
			'ENTITY_TYPE' => MailDiskProxyTypeMail::className(),
			'ENTITY_ID' => 'mail',
		));
		if ($storage)
		{
			MainConfigOption::set('mail', 'disk_attachment_storage_id', $storage->getId());
		}
		else
		{
			$storage = false;
		}
	}

	return $storage;
}