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feat: Add Yii authorization integration with AuthManager and Behaviors methods (#18)
* feat: add Yii authorization integration with AuthManager and Behaviors methods * docs: update README with new Yii Authorization features and usage examples
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‎README.md

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@@ -188,6 +188,64 @@ Determines whether a user has a permission.
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$permission->hasPermissionForUser('eve', 'articles', 'read'); // true or false
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```
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### Using Yii Authorization
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It allows you to integrate Yii's authorization with the Casbin permission management system.
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**(1) AccessChecker**
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Add the accessChecker configuration in your application's `config/web.php` file:
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```php
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$config = [
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'components' => [
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'user' => [
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...
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'accessChecker' => 'yii\permission\components\PermissionChecker',
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]
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];
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```
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Once configured, you can use the `can()` method to check if a user has permission to perform certain actions:
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```php
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$user->can('acrticles,read');
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```
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**(2) Behaviors**
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The `PermissionControl` behavior allows you to enforce permission checks at the controller level. Add the PermissionControl behavior to your controller's behaviors() method:
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```php
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public function behaviors()
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{
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return [
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'permission' => [
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'class' => \yii\permission\components\PermissionControl::class,
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'user' => $user, // optional, defaults to \Yii::$app->user
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'only' => ['read-articles', 'write-articles'],
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'policy' => [
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[
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'allow' => true,
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'actions' => ['read-articles'],
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'enforce' => ['articles', 'read']
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],
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[
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'allow' => true,
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'actions' => ['write-articles'],
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'enforce' => ['articles', 'write']
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]
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],
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'denyCallback' => function ($policy, $action) {
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// custom action when access is denied
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} // optional, defaults to throwing an exception
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]
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];
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}
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```
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**Note:** Additionally,You can also configure a `denyCallback` for each `policy`, which will be invoked when the user does not meet the required permission. This callback takes precedence. The configuration is similar to Yii's official [AccessControl](https://www.yiiframework.com/doc/guide/2.0/zh-cn/security-authorization#access-control-filter).
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See [Casbin API](https://casbin.org/docs/en/management-api) for more APIs.
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## Define your own model.conf

‎src/components/PermissionChecker.php

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<?php
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namespace yii\permission\components;
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use Yii;
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use yii\rbac\CheckAccessInterface;
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class PermissionChecker implements CheckAccessInterface
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{
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/**
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* Checks if the user has access to a certain policy.
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*
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* @param int $userId The ID of the user to check.
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* @param string $policy The policy to check access for.
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* @param array $guards Optional guards to check, not supported yet.
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*
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* @return bool Whether the user has access to the policy.
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*/
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public function checkAccess($userId, $policy, $guards = [])
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{
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$params = explode(',', $policy);
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return Yii::$app->permission->enforce($userId, ...$params);
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}
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}

‎src/components/PermissionControl.php

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<?php
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namespace yii\permission\components;
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use Yii;
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use yii\base\ActionFilter;
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use yii\di\Instance;
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use yii\web\ForbiddenHttpException;
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use yii\web\User;
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class PermissionControl extends ActionFilter
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{
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/**
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* @var User|array|string|false the user object.
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*/
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public $user = 'user';
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/**
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* @var callable|null a callback that will be called if the access should be denied
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*/
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public $denyCallback;
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/**
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* @var array the default configuration of the policy
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*/
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public $policyConfig = ['class' => 'yii\permission\components\PermissionPolicy'];
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/**
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* @var array the policies.
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*/
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public $policy = [];
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/**
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* Initializes the PermissionControl component.
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*
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* @return void
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*/
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public function init()
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{
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parent::init();
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if ($this->user !== false) {
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$this->user = Instance::ensure($this->user, User::class);
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}
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foreach ($this->policy as $i => $policy) {
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if (is_array($policy)) {
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$this->policy[$i] = Yii::createObject(array_merge($this->policyConfig, $policy));
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}
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}
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}
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/**
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* Checks if the current user has permission to perform the given action.
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*
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* @param Action $action the action to be performed
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* @throws ForbiddenHttpException if the user does not have permission
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* @return bool true if the user has permission, false otherwise
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*/
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public function beforeAction($action)
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{
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$user = $this->user;
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foreach ($this->policy as $policy) {
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if ($allow = $policy->allows($action, $user)) {
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return true;
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} elseif ($allow === false) {
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if (isset($policy->denyCallback)) {
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call_user_func($policy->denyCallback, $policy, $action);
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} elseif ($this->denyCallback !== null) {
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call_user_func($this->denyCallback, $policy, $action);
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} else {
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$this->denyAccess($user);
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}
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return false;
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}
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}
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if ($this->denyCallback !== null) {
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call_user_func($this->denyCallback, null, $action);
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} else {
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$this->denyAccess($user);
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}
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return false;
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}
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/**
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* Denies the access of the user.
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* The default implementation will redirect the user to the login page if he is a guest;
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* if the user is already logged, a 403 HTTP exception will be thrown.
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*
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* @param User|false $user the current user or boolean `false` in case of detached User component
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* @throws ForbiddenHttpException if the user is already logged in or in case of detached User component.
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*/
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protected function denyAccess($user)
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{
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if ($user !== false && $user->getIsGuest()) {
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$user->loginRequired();
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} else {
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throw new ForbiddenHttpException(Yii::t('yii', 'You are not allowed to perform this action.'));
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}
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}
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}

‎src/components/PermissionPolicy.php

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<?php
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namespace yii\permission\components;
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use Yii;
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use yii\base\Component;
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use yii\web\User;
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class PermissionPolicy extends Component
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{
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/**
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* @var bool whether this is an 'allow' rule or 'deny' rule.
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*/
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public $allow = false;
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/**
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* @var array|null list of the controller IDs that this rule applies to.
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*/
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public $actions = [];
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/**
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* @var array|null list of params that passed to Casbin.
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*/
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public $enforce = [];
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/**
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* @var callable|null a callback that will be called if the access should be denied
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*/
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public $denyCallback;
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/**
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* Checks whether the given action is allowed for the specified user.
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*
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* @param string $action the action to be checked
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* @param User $user the user to be checked
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*
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* @return bool|null true if the action is allowed, false if not, null if the rule does not apply
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*/
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public function allows($action, $user)
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{
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if (
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$this->matchAction($action)
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&& $this->matchEnforce($user, $this->enforce)
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) {
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return $this->allow ? true : false;
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}
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return null;
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}
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/**
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* Checks if the rule applies to the specified action.
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*
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* @param Action $action the action
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* @return bool whether the rule applies to the action
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*/
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protected function matchAction($action)
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{
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return empty($this->actions) || in_array($action->id, $this->actions, true);
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}
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/**
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* Checks if the rule applies to the specified user.
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*
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* @param User $user
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* @param array $params
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*
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* @return bool
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*/
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protected function matchEnforce($user, $params)
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{
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return Yii::$app->permission->enforce($user->getId(), ...$params);
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}
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}

‎tests/AdapterTest.php

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namespace yii\permission\tests;
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use PHPUnit\Framework\TestCase;
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use yii\web\Application;
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use Yii;
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use yii\permission\models\CasbinRule;
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use Casbin\Persist\Adapters\Filter;
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use Casbin\Exceptions\InvalidFilterTypeException;
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use yii\db\ActiveQueryInterface;
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class AdapterTest extends TestCase
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{
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protected $app;
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public function testEnforce()
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{
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$this->assertTrue(Yii::$app->permission->enforce('alice', 'data1', 'read'));
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['alice', 'data1', 'read'],
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], Yii::$app->permission->getPolicy());
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}
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public function createApplication()
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{
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$config = require __DIR__ . '/../vendor/yiisoft/yii2-app-basic/config/web.php';
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$config['components']['permission'] = require __DIR__ . '/../config/permission.php';
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$config['components']['db']['dsn'] = 'mysql:host=' . $this->env('DB_HOST', '127.0.0.1') . ';port=' . $this->env('DB_PORT', '3306') . ';dbname=' . $this->env('DB_DATABASE', 'casbin');
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$config['components']['db']['username'] = $this->env('DB_USERNAME', 'root');
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$config['components']['db']['password'] = $this->env('DB_PASSWORD', '');
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return new Application($config);
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}
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/**
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* init table.
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*/
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protected function initTable()
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{
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$db = CasbinRule::getDb();
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$tableName = CasbinRule::tableName();
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$table = $db->getTableSchema($tableName);
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if ($table) {
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$db->createCommand()->dropTable($tableName)->execute();
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}
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Yii::$app->permission->init();
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Yii::$app->db->createCommand()->batchInsert(
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$tableName,
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['ptype', 'v0', 'v1', 'v2'],
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[
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['p', 'alice', 'data1', 'read'],
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['p', 'bob', 'data2', 'write'],
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['p', 'data2_admin', 'data2', 'read'],
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['p', 'data2_admin', 'data2', 'write'],
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['g', 'alice', 'data2_admin', null],
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]
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)->execute();
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}
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/**
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* Refresh the application instance.
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*/
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protected function refreshApplication()
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{
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$this->app = $this->createApplication();
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}
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/**
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* This method is called before each test.
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*/
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protected function setUp(): void/* The :void return type declaration that should be here would cause a BC issue */
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{
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if (!$this->app) {
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$this->refreshApplication();
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}
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$this->initTable();
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}
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/**
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* This method is called after each test.
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*/
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protected function tearDown(): void/* The :void return type declaration that should be here would cause a BC issue */
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{
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}
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protected function env($key, $default = null)
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{
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$value = getenv($key);
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if (is_null($default)) {
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return $value;
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}
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return false === $value ? $default : $value;
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}
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}

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