UserService::getInfoAboutUsers

public function getInfoAboutUsers(array $userIds): array
{
	$users = [];

	foreach ($userIds as $key => $userId)
	{
		$usersInfo = $this->getFromCache($userId);
		if ($usersInfo)
		{
			$users[$userId] = $usersInfo;
			unset($userIds[$key]);
		}
	}

	if (!$userIds)
	{
		return (count($users) === 1 ? current($users) : $users);
	}

	$select = [
		'ID',
		'PERSONAL_PHOTO',
		'NAME',
		'LAST_NAME',
		'SECOND_NAME',
		'EXTERNAL_AUTH_ID',
		'UF_DEPARTMENT'
	];

	$queryObject = UserTable::getList([
		'select' => $select,
		'filter' => [
			'ID' => $userIds
		]
	]);
	while ($row = $queryObject->fetch())
	{
		if ($row['PERSONAL_PHOTO'])
		{
			$row['PERSONAL_PHOTO'] = CFile::resizeImageGet(
				$row['PERSONAL_PHOTO'],
				['width' => 100, 'height' => 100],
				BX_RESIZE_IMAGE_EXACT,
				false,
				false,
				true
			);
		}

		$row['USER_NAME'] = TasksUserUtil::formatName($row);

		$pathToUser = str_replace(
			['#user_id#'],
			$row['ID'],
			Option::get('main', 'TOOLTIP_PATH_TO_USER', false, SITE_ID)
		);

		self::$usersInfo[$row['ID']] = $users[$row['ID']] = [
			'id' => $row['ID'],
			'photo' => $row['PERSONAL_PHOTO'],
			'name' => $row['USER_NAME'],
			'pathToUser' => $pathToUser
		];
	}

	return (count($users) === 1 ? current($users) : $users);
}