82 lines
2.0 KiB
PHP
82 lines
2.0 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Security\Core\Role;
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/**
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* RoleHierarchy defines a role hierarchy.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class RoleHierarchy implements RoleHierarchyInterface
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{
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private $hierarchy;
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/** @var array<string, list<string>> */
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protected $map;
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/**
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* @param array<string, list<string>> $hierarchy
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*/
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public function __construct(array $hierarchy)
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{
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$this->hierarchy = $hierarchy;
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$this->buildRoleMap();
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}
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/**
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* {@inheritdoc}
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*/
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public function getReachableRoleNames(array $roles): array
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{
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$reachableRoles = $roles;
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foreach ($roles as $role) {
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if (!isset($this->map[$role])) {
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continue;
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}
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foreach ($this->map[$role] as $r) {
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$reachableRoles[] = $r;
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}
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}
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return array_values(array_unique($reachableRoles));
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}
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protected function buildRoleMap()
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{
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$this->map = [];
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foreach ($this->hierarchy as $main => $roles) {
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$this->map[$main] = $roles;
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$visited = [];
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$additionalRoles = $roles;
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while ($role = array_shift($additionalRoles)) {
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if (!isset($this->hierarchy[$role])) {
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continue;
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}
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$visited[] = $role;
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foreach ($this->hierarchy[$role] as $roleToAdd) {
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$this->map[$main][] = $roleToAdd;
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}
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foreach (array_diff($this->hierarchy[$role], $visited) as $additionalRole) {
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$additionalRoles[] = $additionalRole;
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}
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}
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$this->map[$main] = array_unique($this->map[$main]);
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}
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}
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}
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