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<?php
namespace Bitrix\Landing\Controller;
use Bitrix\Landing\Block;
use Bitrix\Landing\Connector;
use Bitrix\Landing\Site\Type;
use Bitrix\Main\Engine\Controller;
use Bitrix\Main\Engine\Response\BFile;
use Bitrix\Main\Error;
use Bitrix\Main\UI\Viewer;
class DiskFile extends Controller
{
private const FILE_DOWNLOAD_URL = '/bitrix/services/main/ajax.php?' .
'action=landing.api.diskFile.download&' .
'fileId=#fileId#&blockId=#blockId#&scope=#scope#';
public function getDefaultPreFilters(): array
{
return [];
}
/**
* Returns URL for download action.
*
* @param string $scope Scope code (site type).
* @param int $blockId Block id.
* @param int|null $fileId File id.
* @return string
*/
public static function getDownloadLink(string $scope, int $blockId, ?int $fileId = null): string
{
return str_replace(
['#scope#', '#blockId#', '#fileId#'],
[$scope, $blockId, $fileId ?: '#fileId#'],
self::FILE_DOWNLOAD_URL . '&ver=' . time()
);
}
/**
* Checks that current user has permissions for specified file.
*
* @param string $scope Scope code (site type).
* @param int $blockId Block id.
* @param int $fileId File id.
* @return bool
*/
private function blockContainsFile(string $scope, int $blockId, int $fileId): bool
{
if (Type::isPublicScope($scope))
{
return false;
}
Type::setScope($scope);
$needed = Connector\Disk::FILE_PREFIX_HREF . $fileId;
return Block::isContains($blockId, $needed);
}
/**
* Checks that current user has permissions for specified file.
*
* @param string $scope Scope code (site type).
* @param int $landingId Landing id.
* @param int $fileId File id.
* @return bool
*/
private function landingContainsFile(string $scope, int $landingId, int $fileId): bool
{
if (Type::isPublicScope($scope))
{
return false;
}
Type::setScope($scope);
$needed = Connector\Disk::FILE_PREFIX_HREF . $fileId;
return Block::isContains($landingId, $needed, true);
}
/**
* Downloads file after check permissions.
*
* @param string $scope Scope code (site type).
* @param int $blockId Block id.
* @param int $fileId File id.
* @return BFile|null
*/
public function downloadAction(string $scope, int $blockId, int $fileId): ?BFile
{
if ($this->blockContainsFile($scope, $blockId, $fileId))
{
$fileInfo = \Bitrix\Landing\Connector\Disk::getFileInfo($fileId, false);
if ($fileInfo)
{
return new BFile(\CFile::getFileArray($fileInfo['ID']), $fileInfo['NAME']);
}
}
$this->addError(new Error('Access denied.'));
return null;
}
/**
* Returns file info for viewer after check permissions.
*
* @param string $scope Scope code (site type).
* @param int $blockId Block id.
* @param int $fileId File id.
* @return array|null
*/
public function viewAction(string $scope, int $blockId, int $fileId): ?array
{
if ($this->blockContainsFile($scope, $blockId, $fileId))
{
$fileInfo = \Bitrix\Landing\Connector\Disk::getFileInfo($fileId, false);
if ($fileInfo)
{
$urlToDownload = $this->getDownloadLink($scope, $blockId, $fileId);
$attributes = Viewer\ItemAttributes::tryBuildByFileId($fileInfo['ID'], $urlToDownload);
$attributes->setTitle($fileInfo['NAME']);
return $attributes->getAttributes();
}
}
$this->addError(new Error('Access denied.'));
return null;
}
/**
* Returns raw file info.
*
* @param int $fileId File id.
* @return array|null
*/
public function infoAction(int $fileId, string $scope, int $landingId): ?array
{
if ($this->landingContainsFile($scope, $landingId, $fileId))
{
return \Bitrix\Landing\Connector\Disk::getFileInfo($fileId, false);
}
return null;
}
}