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<?php
/**
* @copyright Copyright (c) 2017, Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* 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 OC\Federation;
use OCP\Federation\ICloudId;
use OCP\Federation\ICloudIdManager;
class CloudIdManager implements ICloudIdManager {
/**
* @param string $cloudId
* @return ICloudId
* @throws \InvalidArgumentException
*/
public function resolveCloudId($cloudId) {
// TODO magic here to get the url and user instead of just splitting on @
if (!$this->isValidCloudId($cloudId)) {
throw new \InvalidArgumentException('Invalid cloud id');
}
// Find the first character that is not allowed in user names
$id = $this->fixRemoteURL($cloudId);
$posSlash = strpos($id, '/');
$posColon = strpos($id, ':');
if ($posSlash === false && $posColon === false) {
$invalidPos = strlen($id);
} else if ($posSlash === false) {
$invalidPos = $posColon;
} else if ($posColon === false) {
$invalidPos = $posSlash;
} else {
$invalidPos = min($posSlash, $posColon);
}
// Find the last @ before $invalidPos
$pos = $lastAtPos = 0;
while ($lastAtPos !== false && $lastAtPos <= $invalidPos) {
$pos = $lastAtPos;
$lastAtPos = strpos($id, '@', $pos + 1);
}
if ($pos !== false) {
$user = substr($id, 0, $pos);
$remote = substr($id, $pos + 1);
if (!empty($user) && !empty($remote)) {
return new CloudId($id, $user, $remote);
}
}
throw new \InvalidArgumentException('Invalid cloud id');
}
/**
* @param string $user
* @param string $remote
* @return CloudId
*/
public function getCloudId($user, $remote) {
// TODO check what the correct url is for remote (asking the remote)
return new CloudId($user. '@' . $remote, $user, $remote);
}
/**
* Strips away a potential file names and trailing slashes:
* - http://localhost
* - http://localhost/
* - http://localhost/index.php
* - http://localhost/index.php/s/{shareToken}
*
* all return: http://localhost
*
* @param string $remote
* @return string
*/
protected function fixRemoteURL($remote) {
$remote = str_replace('\\', '/', $remote);
if ($fileNamePosition = strpos($remote, '/index.php')) {
$remote = substr($remote, 0, $fileNamePosition);
}
$remote = rtrim($remote, '/');
return $remote;
}
/**
* @param string $cloudId
* @return bool
*/
public function isValidCloudId($cloudId) {
return strpos($cloudId, '@') !== false;
}
}
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