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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.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\WorkflowEngine\Service;
use OCA\WorkflowEngine\Helper\ScopeContext;
use OCA\WorkflowEngine\Manager;
use OCP\AppFramework\QueryException;
use OCP\Files\Storage\IStorage;
use OCP\IL10N;
use OCP\IServerContainer;
use OCP\IUserSession;
use OCP\WorkflowEngine\ICheck;
use OCP\WorkflowEngine\IEntity;
use OCP\WorkflowEngine\IEntityCheck;
use OCP\WorkflowEngine\IFileCheck;
use OCP\WorkflowEngine\IManager;
use OCP\WorkflowEngine\IOperation;
use OCP\WorkflowEngine\IRuleMatcher;
use RuntimeException;
class RuleMatcher implements IRuleMatcher {
/** @var IUserSession */
protected $session;
/** @var IManager */
protected $manager;
/** @var array */
protected $contexts;
/** @var IServerContainer */
protected $container;
/** @var array */
protected $fileInfo = [];
/** @var IL10N */
protected $l;
/** @var IOperation */
protected $operation;
/** @var IEntity */
protected $entity;
public function __construct(
IUserSession $session,
IServerContainer $container,
IL10N $l,
Manager $manager
) {
$this->session = $session;
$this->manager = $manager;
$this->container = $container;
$this->l = $l;
}
public function setFileInfo(IStorage $storage, string $path, bool $isDir = false): void {
$this->fileInfo['storage'] = $storage;
$this->fileInfo['path'] = $path;
$this->fileInfo['isDir'] = $isDir;
}
public function setEntitySubject(IEntity $entity, $subject): void {
$this->contexts[get_class($entity)] = [$entity, $subject];
}
public function setOperation(IOperation $operation): void {
if($this->operation !== null) {
throw new RuntimeException('This method must not be called more than once');
}
$this->operation = $operation;
}
public function setEntity(IEntity $entity): void {
if($this->entity !== null) {
throw new RuntimeException('This method must not be called more than once');
}
$this->entity = $entity;
}
public function getEntity(): IEntity {
if($this->entity === null) {
throw new \LogicException('Entity was not set yet');
}
return $this->entity;
}
public function getFlows(bool $returnFirstMatchingOperationOnly = true): array {
if(!$this->operation) {
throw new RuntimeException('Operation is not set');
}
return $this->getMatchingOperations(get_class($this->operation), $returnFirstMatchingOperationOnly);
}
public function getMatchingOperations(string $class, bool $returnFirstMatchingOperationOnly = true): array {
$scopes[] = new ScopeContext(IManager::SCOPE_ADMIN);
$user = $this->session->getUser();
if($user !== null) {
$scopes[] = new ScopeContext(IManager::SCOPE_USER, $user->getUID());
}
$operations = [];
foreach ($scopes as $scope) {
$operations = array_merge($operations, $this->manager->getOperations($class, $scope));
}
$additionalScopes = $this->manager->getAllConfiguredScopesForOperation($class);
foreach ($additionalScopes as $hash => $scopeCandidate) {
/** @var ScopeContext $scopeCandidate */
if ($scopeCandidate->getScope() !== IManager::SCOPE_USER) {
continue;
}
if ($this->entity->isLegitimatedForUserId($scopeCandidate->getScopeId())) {
$operations = array_merge($operations, $this->manager->getOperations($class, $scopeCandidate));
}
}
$matches = [];
foreach ($operations as $operation) {
$checkIds = json_decode($operation['checks'], true);
$checks = $this->manager->getChecks($checkIds);
foreach ($checks as $check) {
if (!$this->check($check)) {
// Check did not match, continue with the next operation
continue 2;
}
}
if ($returnFirstMatchingOperationOnly) {
return $operation;
}
$matches[] = $operation;
}
return $matches;
}
/**
* @param array $check
* @return bool
*/
public function check(array $check) {
try {
$checkInstance = $this->container->query($check['class']);
} catch (QueryException $e) {
// Check does not exist, assume it matches.
return true;
}
if ($checkInstance instanceof IFileCheck) {
if (empty($this->fileInfo)) {
throw new RuntimeException('Must set file info before running the check');
}
$checkInstance->setFileInfo($this->fileInfo['storage'], $this->fileInfo['path'], $this->fileInfo['isDir']);
} elseif ($checkInstance instanceof IEntityCheck) {
foreach($this->contexts as $entityInfo) {
list($entity, $subject) = $entityInfo;
$checkInstance->setEntitySubject($entity, $subject);
}
} else if(!$checkInstance instanceof ICheck) {
// Check is invalid
throw new \UnexpectedValueException($this->l->t('Check %s is invalid or does not exist', $check['class']));
}
return $checkInstance->executeCheck($check['operator'], $check['value']);
}
}
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