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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 as i; |
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use Improved\IteratorPipeline\Pipeline; |
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use Jasny\Auth\AuthzInterface; |
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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 level. |
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* @immutable |
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* |
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* <code> |
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* $authz = new Authz\Levels([ |
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* 'user' => 1, |
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* 'moderator' => 100, |
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* 'admin' => 1000 |
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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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* Levels should be positive integers. |
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*/ |
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class Levels implements AuthzInterface |
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{ |
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use StateTrait; |
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/** @var array<string,int> */ |
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protected array $levels; |
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/** |
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* Cached user level. Service has an immutable state. |
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*/ |
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protected int $userLevel = 0; |
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/** |
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* AuthzByLevel constructor. |
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* |
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* @param array<string,int> $levels |
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*/ |
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public function __construct(array $levels) |
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{ |
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$this->levels = $levels; |
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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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private 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->calcUserLevel(); |
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$isSame = $clone->{$property} === $this->{$property} && $clone->userLevel === $this->userLevel; |
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return $isSame ? $this : $clone; |
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} |
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/** |
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* Get all available authorization roles (for the current context) |
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* |
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* @return string[] |
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*/ |
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1 |
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public function getAvailableRoles(): array |
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{ |
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return array_keys($this->levels); |
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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->levels[$role])) { |
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trigger_error("Unknown authz role '$role'", E_USER_WARNING); // Catch typos |
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return false; |
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} |
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return $this->userLevel >= $this->levels[$role]; |
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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 $this if authz hasn't changed. |
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* |
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* @return static |
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*/ |
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3 |
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public function recalc(): self |
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{ |
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3 |
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$clone = clone $this; |
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3 |
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$clone->calcUserLevel(); |
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return $clone->userLevel === $this->userLevel ? $this : $clone; |
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} |
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/** |
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* Get access level of the current user. |
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* |
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* @throws \DomainException for unknown level names |
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*/ |
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private function calcUserLevel(): void |
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{ |
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if ($this->user === null) { |
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$this->userLevel = 0; |
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return; |
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} |
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$uid = $this->user->getAuthId(); |
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$role = i\type_check( |
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$this->user->getAuthRole($this->context), |
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['int', 'string'], |
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new \UnexpectedValueException("For authz levels the role should be string|int, %s returned (uid:$uid)") |
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); |
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if (is_string($role) && !isset($this->levels[$role])) { |
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throw new \DomainException("Authorization level '$role' isn't defined (uid:$uid)"); |
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} |
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$this->userLevel = is_string($role) ? $this->levels[$role] : (int)$role; |
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} |
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} |
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jasny /
auth
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