<?php

declare(strict_types=1);

namespace Bitrix\Socialnetwork\Provider;

use Bitrix\Main\Type\Collection;
use Bitrix\Main\UserTable;
use Bitrix\Socialnetwork\Helper\InstanceTrait;

class EmployeeProvider
{
	protected const CACHE_TTL = 60;

	use InstanceTrait;

	/**
	 * Returns array
	 * [
	 *    [employeeIds]
	 *    [guestIds]
	 * ]
	 */
	public function splitIntoEmployeesAndGuests(array $userIds): array
	{
		Collection::normalizeArrayValuesByInt($userIds, false);

		if (empty($userIds))
		{
			return [
				0 => [],
				1 => [],
			];
		}

		$employees = UserTable::query()
				->addSelect('ID')
				->addFilter('!UF_DEPARTMENT', false)
				->setCacheTtl(10)
				->whereIn('ID', $userIds)
				->exec()
				->fetchAll()
		;

		$employeeIds = array_column($employees, 'ID');

		Collection::normalizeArrayValuesByInt($employeeIds, false);

		$guestIds = array_diff($userIds, $employeeIds);

		return [
			0 => $employeeIds,
			1 => $guestIds,
		];
	}
}