owncloud/core

<?php
/**
 * @author Lukas Reschke <lukas@statuscode.ch>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */
namespace OCA\DAV\Upload;

use OCA\DAV\Connector\Sabre\Directory;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\IFile;

/**
 * Class FutureFile
 *
 * The FutureFile is a SabreDav IFile which connects the chunked upload directory
 * with the AssemblyStream, who does the final assembly job
 *
 * @package OCA\DAV\Upload
 */
class FutureFile implements \Sabre\DAV\IFile {
    /** @var Directory */
    private $root;
    /** @var string */
    private $name;

    public static function getFutureFileName() {
        return '.file';
    }

    public static function isFutureFile() {
        $davUploadsTarget = '/dav/uploads';

        // Check if pathinfo starts with dav uploads target and basename is future file basename
        if (isset($_SERVER['PATH_INFO'])
            && \pathinfo($_SERVER['PATH_INFO'], PATHINFO_BASENAME) === FutureFile::getFutureFileName()
            && (\strpos($_SERVER['PATH_INFO'], $davUploadsTarget) === 0)) {
            return true;
        }

        return false;
    }

    /**
     * @param Directory $root
     * @param string $name
     */
    public function __construct(Directory $root, $name) {
        $this->root = $root;
        $this->name = $name;
    }

    /**
     * @inheritdoc
     */
    public function put($data) {
        throw new Forbidden('Permission denied to put into this file');
    }

    /**
     * @inheritdoc
     */
    public function get() {
        $nodes = $this->root->getChildren();
        return AssemblyStream::wrap($nodes);
    }

    /**
     * @inheritdoc
     */
    public function getContentType() {
        return 'application/octet-stream';
    }

    /**
     * @inheritdoc
     */
    public function getETag() {
        return $this->root->getETag();
    }

    /**
     * @inheritdoc
     */
    public function getSize() {
        $children = $this->root->getChildren();
        $sizes = \array_map(function ($node) {
            /** @var IFile $node */
            return $node->getSize();
        }, $children);

        return \array_sum($sizes);
    }

    /**
     * @inheritdoc
     */
    public function delete() {
        $this->root->delete();
    }

    /**
     * @inheritdoc
     */
    public function getName() {
        return $this->name;
    }

    /**
     * @inheritdoc
     */
    public function setName($name) {
        throw new Forbidden('Permission denied to rename this file');
    }

    /**
     * @inheritdoc
     */
    public function getLastModified() {
        return $this->root->getLastModified();
    }
}