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<?php |
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/** |
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* WebHemi. |
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* |
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* PHP version 7.1 |
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* |
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* @copyright 2012 - 2017 Gixx-web (http://www.gixx-web.com) |
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* @license https://opensource.org/licenses/MIT The MIT License (MIT) |
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* |
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* @link http://www.gixx-web.com |
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*/ |
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declare(strict_types = 1); |
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namespace WebHemi\Acl; |
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use WebHemi\Adapter\Acl\AclAdapterInterface; |
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use WebHemi\Data\Coupler\UserGroupToPolicyCoupler; |
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use WebHemi\Data\Coupler\UserToGroupCoupler; |
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use WebHemi\Data\Coupler\UserToPolicyCoupler; |
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use WebHemi\Data\Entity\AccessManagement\PolicyEntity; |
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use WebHemi\Data\Entity\AccessManagement\ResourceEntity; |
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use WebHemi\Data\Entity\ApplicationEntity; |
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use WebHemi\Data\Entity\User\UserEntity; |
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/** |
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* Class Acl |
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*/ |
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final class Acl implements AclAdapterInterface |
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{ |
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/** @var UserToPolicyCoupler */ |
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private $userToPolicyCoupler; |
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/** @var UserToGroupCoupler */ |
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private $userToGroupCoupler; |
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/** @var UserGroupToPolicyCoupler */ |
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private $userGroupToPolicyCoupler; |
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/** |
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* Acl constructor. |
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* |
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* @param UserToPolicyCoupler $userToPolicyCoupler |
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* @param UserToGroupCoupler $userToGroupCoupler |
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* @param UserGroupToPolicyCoupler $userGroupToPolicyCoupler |
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*/ |
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public function __construct( |
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UserToPolicyCoupler $userToPolicyCoupler, |
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UserToGroupCoupler $userToGroupCoupler, |
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UserGroupToPolicyCoupler $userGroupToPolicyCoupler |
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) { |
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$this->userToPolicyCoupler = $userToPolicyCoupler; |
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$this->userToGroupCoupler = $userToGroupCoupler; |
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$this->userGroupToPolicyCoupler = $userGroupToPolicyCoupler; |
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} |
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/** |
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* Checks if a User can access to a Resource in an Application |
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* |
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* @param UserEntity $userEntity |
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* @param ResourceEntity|null $resourceEntity |
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* @param ApplicationEntity|null $applicationEntity |
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* @return bool |
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*/ |
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public function isAllowed( |
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UserEntity $userEntity, |
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?ResourceEntity $resourceEntity = null, |
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?ApplicationEntity $applicationEntity = null |
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) : bool { |
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// We assume the best case: the user has access |
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$allowed = true; |
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/** @var array<PolicyEntity> $policies */ |
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$policies = array_merge($this->getUserPolicies($userEntity), $this->getUserGroupPolicies($userEntity)); |
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foreach ($policies as $policyEntity) { |
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$allowed = $allowed && $this->checkPolicy($policyEntity, $applicationEntity, $resourceEntity); |
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} |
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return $allowed; |
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} |
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/** |
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* Gets the policies assigned to the user. |
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* |
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* @param UserEntity $userEntity |
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* @return array<PolicyEntity> |
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*/ |
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private function getUserPolicies(UserEntity $userEntity) : array |
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{ |
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/** @var array<PolicyEntity> $userPolicies */ |
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return $this->userToPolicyCoupler->getEntityDependencies($userEntity); |
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} |
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/** |
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* Gets the policies assigned to the group in which the user is. |
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* |
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* @param UserEntity $userEntity |
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* @return array<PolicyEntity> |
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*/ |
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private function getUserGroupPolicies(UserEntity $userEntity) : array |
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{ |
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/** @var array<PolicyEntity> $userGroupPolicies */ |
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$userGroupPolicies = []; |
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/** @var array<UserGroupEntity> $userGroups */ |
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$userGroups = $this->userToGroupCoupler->getEntityDependencies($userEntity); |
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foreach ($userGroups as $userGroupEntity) { |
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/** @var array<PolicyEntity> $groupPolicies */ |
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$groupPolicies = $this->userGroupToPolicyCoupler->getEntityDependencies($userGroupEntity); |
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$userGroupPolicies = array_merge($userGroupPolicies, $groupPolicies); |
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} |
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return $userGroupPolicies; |
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} |
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/** |
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* Check a concrete policy. |
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* |
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* @param PolicyEntity $policyEntity |
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* @param ApplicationEntity|null $applicationEntity |
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* @param ResourceEntity|null $resourceEntity |
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* @return bool |
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*/ |
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private function checkPolicy( |
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PolicyEntity $policyEntity, |
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?ApplicationEntity $applicationEntity = null, |
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?ResourceEntity $resourceEntity = null |
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) : bool { |
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$policyApplicationId = $policyEntity->getApplicationId(); |
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$policyResourceId = $policyEntity->getResourceId(); |
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$applicationId = $applicationEntity ? $applicationEntity->getApplicationId() : null; |
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$resourceId = $resourceEntity ? $resourceEntity->getResourceId() : null; |
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// The user has access when: |
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// - user/user's group has a policy that connected to the current application OR any application AND |
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// - user/user's group has a policy that connected to the current resource OR any resource |
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if (($policyApplicationId == null || $policyApplicationId == $applicationId) |
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&& ($policyResourceId == null || $policyResourceId == $resourceId) |
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) { |
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return $policyEntity->getAllowed(); |
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} |
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// At this point we know that the current policy doesn't belong to this application or resource, so no need |
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// to block the user. |
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return true; |
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} |
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} |
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Gixx /
WebHemi
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