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<?php declare(strict_types = 1); | |
/* | |
* Copyright (c) 2020, Josef Kufner <josef@kufner.cz> | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
*/ | |
namespace Smalldb\StateMachine\AccessControlExtension; | |
use Smalldb\StateMachine\AccessControlExtension\Definition\StateMachine\AccessControlExtension; | |
use Smalldb\StateMachine\AccessControlExtension\Definition\Transition\AccessPolicyExtension; | |
use Smalldb\StateMachine\AccessControlExtension\Predicate\ContainerAdapter; | |
use Smalldb\StateMachine\AccessControlExtension\Predicate\PredicateCompiled; | |
use Smalldb\StateMachine\AccessControlExtension\Predicate\SymfonyContainerAdapter; | |
use Smalldb\StateMachine\Definition\TransitionDefinition; | |
use Smalldb\StateMachine\InvalidArgumentException; | |
use Smalldb\StateMachine\ReferenceInterface; | |
use Smalldb\StateMachine\SmalldbDefinitionBagInterface; | |
use Smalldb\StateMachine\Transition\TransitionGuard; | |
use Symfony\Component\DependencyInjection\ContainerBuilder; | |
class SimpleTransitionGuard implements TransitionGuard | |
{ | |
/** @var \Closure[][][] */ | |
private array $transitionPredicates; | |
/** @var PredicateCompiled[][][] */ | |
private array $transitionPredicateCache = []; | |
private bool $defaultAllow; | |
/** | |
* @param \Closure[][][] $transitionPredicates | |
*/ | |
public function __construct(array $transitionPredicates = [], bool $defaultAllow = true) | |
{ | |
$this->transitionPredicates = $transitionPredicates; | |
$this->defaultAllow = $defaultAllow; | |
} | |
public static function compileTransitionPredicatesSymfony(SmalldbDefinitionBagInterface $definitionBag, ContainerBuilder $container) | |
{ | |
$containerAdapter = new SymfonyContainerAdapter($container); | |
return static::compileTransitionPredicates($definitionBag, $containerAdapter); | |
} | |
public static function compileTransitionPredicates(SmalldbDefinitionBagInterface $definitionBag, ContainerAdapter $containerAdapter) | |
{ | |
$guardPredicates = []; | |
foreach ($definitionBag->getAllDefinitions() as $definition) { | |
if ($definition->hasExtension(AccessControlExtension::class)) { | |
/** @var AccessControlExtension $ext */ | |
$ext = $definition->getExtension(AccessControlExtension::class); | |
$predicates = $ext->compilePolicyPredicates($containerAdapter); | |
$defaultPolicyName = $ext->getDefaultPolicyName(); | |
$machineType = $definition->getMachineType(); | |
foreach ($definition->getTransitions() as $tr) { | |
$transitionName = $tr->getName(); | |
$sourceState = $tr->getSourceState()->getName(); | |
if ($tr->hasExtension(AccessPolicyExtension::class)) { | |
/** @var AccessPolicyExtension $policyExt */ | |
$policyExt = $tr->getExtension(AccessPolicyExtension::class); | |
$policyName = $policyExt->getPolicyName(); | |
} else { | |
$policyName = $defaultPolicyName; | |
} | |
if (empty($predicates[$policyName])) { | |
throw new InvalidArgumentException("Access policy not found: $policyName"); | |
} | |
$guardPredicates[$machineType][$sourceState][$transitionName] | |
= $containerAdapter->closureWrap($predicates[$policyName]); | |
} | |
} | |
} | |
return $guardPredicates; | |
} | |
public function isTransitionAllowed(ReferenceInterface $ref, TransitionDefinition $transition): bool | |
{ | |
return $this->isAccessAllowed($ref->getMachineType(), $transition->getName(), $ref); | |
} | |
public function isAccessAllowed(string $machineType, string $transitionName, ReferenceInterface $ref): bool | |
{ | |
if (!empty($this->transitionPredicates[$machineType])) { | |
$sourceState = $ref->getState(); | |
// Check cached predicate | |
if (isset($this->transitionPredicateCache[$machineType][$sourceState][$transitionName])) { | |
return $this->transitionPredicateCache[$machineType][$sourceState][$transitionName]->evaluate($ref); | |
} | |
// Load predicate | |
$predicate = $this->getTransitionPredicate($machineType, $sourceState, $transitionName); | |
if ($predicate !== null) { | |
$this->transitionPredicateCache[$machineType][$sourceState][$transitionName] = $predicate; | |
return $predicate->evaluate($ref); | |
} | |
// No predicate | |
return false; | |
} else { | |
return $this->defaultAllow; | |
} | |
} | |
public function getTransitionPredicates(): array | |
{ | |
return $this->transitionPredicates; | |
} | |
private function getTransitionPredicate(string $machineType, string $sourceState, string $transitionName): ?PredicateCompiled | |
{ | |
$p = $this->transitionPredicates[$machineType][$sourceState][$transitionName] ?? null; | |
if ($p instanceof PredicateCompiled) { | |
return $p; | |
} else if (is_callable($p)) { | |
return $p(); | |
} else { | |
return null; | |
} | |
} | |
} |