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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2019, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @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 OC\Security\FeaturePolicy;
use OCP\AppFramework\Http\EmptyFeaturePolicy;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\Security\FeaturePolicy\AddFeaturePolicyEvent;
class FeaturePolicyManager {
/** @var EmptyFeaturePolicy[] */
private $policies = [];
/** @var IEventDispatcher */
private $dispatcher;
public function __construct(IEventDispatcher $dispatcher) {
$this->dispatcher = $dispatcher;
}
public function addDefaultPolicy(EmptyFeaturePolicy $policy): void {
$this->policies[] = $policy;
}
public function getDefaultPolicy(): FeaturePolicy {
$event = new AddFeaturePolicyEvent($this);
$this->dispatcher->dispatchTyped($event);
$defaultPolicy = new FeaturePolicy();
foreach ($this->policies as $policy) {
$defaultPolicy = $this->mergePolicies($defaultPolicy, $policy);
}
return $defaultPolicy;
}
/**
* Merges the first given policy with the second one
*
*/
public function mergePolicies(FeaturePolicy $defaultPolicy,
EmptyFeaturePolicy $originalPolicy): FeaturePolicy {
foreach ((object)(array)$originalPolicy as $name => $value) {
$setter = 'set' . ucfirst($name);
if (\is_array($value)) {
$getter = 'get' . ucfirst($name);
$currentValues = \is_array($defaultPolicy->$getter()) ? $defaultPolicy->$getter() : [];
$defaultPolicy->$setter(\array_values(\array_unique(\array_merge($currentValues, $value))));
} elseif (\is_bool($value)) {
$defaultPolicy->$setter($value);
}
}
return $defaultPolicy;
}
}
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