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<?php |
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declare(strict_types=1); |
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namespace Jasny\Auth\Authz; |
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use Improved\IteratorPipeline\Pipeline; |
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use Jasny\Auth\AuthzInterface as Authz; |
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use Jasny\Auth\ContextInterface as Context; |
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use Jasny\Auth\UserInterface as User; |
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/** |
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* Authorize by access group. |
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* Can be used for ACL (Access Control List). |
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* @immutable |
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* |
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* <code> |
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* $authz = new Authz\Groups([ |
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* 'user' => [], |
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* 'accountant' => ['user'], |
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* 'moderator' => ['user'], |
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* 'developer' => ['user'], |
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* 'admin' => ['moderator', 'developer'] |
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* ]); |
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* |
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* $auth = new Auth($authz); |
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* </code> |
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*/ |
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class Groups implements Authz |
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{ |
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use StateTrait; |
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/** @var array<string,string[]> */ |
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protected array $groups; |
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/** |
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* Current authenticated user |
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*/ |
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protected ?User $user = null; |
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/** |
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* The authorization context. This could be an organization, where a user has specific roles per organization |
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* rather than roles globally. |
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*/ |
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protected ?Context $context = null; |
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/** |
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* Cached user level. Service has an immutable state. |
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* @var string[] |
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*/ |
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protected array $userRoles = []; |
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/** |
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* AuthzByGroup constructor. |
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* |
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* @param array<string,string[]> $groups |
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*/ |
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public function __construct(array $groups) |
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{ |
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foreach ($groups as $group => &$roles) { |
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$roles = $this->expand($group, $groups); |
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} |
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$this->groups = $groups; |
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} |
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/** |
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* Get a copy of the service with a modified property and recalculated |
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* Returns $this if authz hasn't changed. |
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* |
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* @param string $property |
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* @param string $value |
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* @return static |
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*/ |
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protected function withProperty(string $property, $value): self |
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{ |
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$clone = clone $this; |
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$clone->{$property} = $value; |
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$clone->calcUserRoles(); |
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$isSame = $clone->{$property} === $this->{$property} && $clone->userRoles === $this->userRoles; |
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return $isSame ? $this : $clone; |
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} |
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/** |
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* Expand groups to include all roles they supersede. |
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* |
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* @param string $role |
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* @param array<string,string[]> $groups |
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* @param string[] $expanded Accumulator |
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* @return string[] |
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*/ |
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protected function expand(string $role, array $groups, array &$expanded = []): array |
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{ |
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$expanded[] = $role; |
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// Ignore duplicates. |
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$additionalRoles = array_diff($groups[$role], $expanded); |
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// Remove current role from groups to prevent issues from cross-references. |
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$groupsWithoutCurrent = array_diff_key($groups, [$role => null]); |
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// Recursively expand the superseded roles. |
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foreach ($additionalRoles as $additionalRole) { |
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$this->expand($additionalRole, $groupsWithoutCurrent, $expanded); |
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} |
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return $expanded; |
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} |
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/** |
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* Get all available authorization roles (for the current context). |
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* |
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* @return string[] |
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*/ |
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public function getAvailableRoles(): array |
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{ |
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return array_keys($this->groups); |
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} |
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/** |
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* Check if the current user is logged in and has specified role. |
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*/ |
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public function is(string $role): bool |
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{ |
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if (!isset($this->groups[$role])) { |
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trigger_error("Unknown authz role '$role'", E_USER_WARNING); // Catch typos |
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return false; |
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} |
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return in_array($role, $this->userRoles, true); |
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} |
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/** |
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* Get a copy, recalculating the authz level of the user. |
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* Returns $this if authz hasn't changed. |
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* |
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* @return static |
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*/ |
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public function recalc(): self |
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{ |
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$clone = clone $this; |
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$clone->calcUserRoles(); |
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return $clone->userRoles === $this->userRoles ? $this : $clone; |
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} |
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/** |
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* Calculate the (expanded) roles of the current user. |
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*/ |
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protected function calcUserRoles(): void |
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{ |
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if ($this->user === null) { |
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$this->userRoles = []; |
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return; |
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} |
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$role = $this->user->getAuthRole($this->context); |
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$roles = is_array($role) ? $role : [$role]; |
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$this->userRoles = Pipeline::with($roles) |
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->map(fn($role) => $this->groups[$role] ?? []) |
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->flatten() |
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->unique() |
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->toArray(); |
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} |
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} |
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jasny /
auth
