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<?php
/**
* @copyright Copyright (c) 2023 Claus-Justus Heine
*
* @author Claus-Justus Heine <himself@claus-justus-heine.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\DAV\Connector\Sabre;
use Sabre\DAV\Server;
use Sabre\DAV\ServerPlugin;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
/**
* A plugin which tries to work-around peculiarities of the MacOS DAV client
* apps. The following problems are addressed:
*
* - OSX calendar client sends REPORT requests to a random principal
* collection but expects to find all principals (forgot to set
* {DAV:}principal-property-search flag?)
*/
class AppleQuirksPlugin extends ServerPlugin {
/*
private const OSX_CALENDAR_AGENT = 'CalendarAgent';
private const OSX_DATAACCESSD_AGENT = 'dataaccessd';
private const OSX_ACCOUNTSD_AGENT = 'accountsd';
private const OSX_CONTACTS_AGENT = 'AddressBookCore';
*/
private const OSX_AGENT_PREFIX = 'macOS';
/** @var bool */
private $isMacOSDavAgent = false;
/**
* Sets up the plugin.
*
* This method is automatically called by the server class.
*
* @return void
*/
public function initialize(Server $server)
{
$server->on('beforeMethod:REPORT', [$this, 'beforeReport'], 0);
$server->on('report', [$this, 'report'], 0);
}
/**
* Triggered before any method is handled.
*
* @return void
*/
public function beforeReport(RequestInterface $request, ResponseInterface $response)
{
$userAgent = $request->getRawServerValue('HTTP_USER_AGENT') ?? 'unknown';
$this->isMacOSDavAgent = $this->isMacOSUserAgent($userAgent);
}
/**
* This method handles HTTP REPORT requests.
*
* @param string $reportName
* @param mixed $report
* @param mixed $path
*
* @return bool
*/
public function report($reportName, $report, $path)
{
if ($reportName == '{DAV:}principal-property-search' && $this->isMacOSDavAgent) {
/** @var \Sabre\DAVACL\Xml\Request\PrincipalPropertySearchReport $report */
$report->applyToPrincipalCollectionSet = true;
}
return true;
}
/**
* Check whether the given $userAgent string pretends to originate from OSX.
*
* @param string $userAgent
*
* @return bool
*/
protected function isMacOSUserAgent(string $userAgent):bool
{
return str_starts_with(self::OSX_AGENT_PREFIX, $userAgent);
}
/**
* Decode the given OSX DAV agent string.
*
* @param string $agent
*
* @return null|array
*/
protected function decodeMacOSAgentString(string $userAgent):?array
{
// OSX agent string is like: macOS/13.2.1 (22D68) dataaccessd/1.0
if (preg_match('|^' . self::OSX_AGENT_PREFIX . '/([0-9]+)\\.([0-9]+)\\.([0-9]+)\s+\((\w+)\)\s+([^/]+)/([0-9]+)(?:\\.([0-9]+))?(?:\\.([0-9]+))?$|i', $userAgent, $matches)) {
return [
'macOSVersion' => [
'major' => $matches[1],
'minor' => $matches[2],
'patch' => $matches[3],
],
'macOSAgent' => $matches[5],
'macOSAgentVersion' => [
'major' => $matches[6],
'minor' => $matches[7] ?? null,
'patch' => $matches[8] ?? null,
],
];
}
return null;
}
}
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