Scope entity is json serializable

src/Entity/ScopeEntity.php

@@ -16,7 +16,7 @@ use League\OAuth2\Server\AbstractServer;
 /**
  * Scope entity class
  */
-class ScopeEntity
+class ScopeEntity implements \JsonSerializable
 {
     /**
      * Scope identifier
@@ -89,4 +89,16 @@ class ScopeEntity
     {
         return $this->description;
     }
+
+    /**
+     * Returns a JSON object when entity is passed into json_encode
+     * @return array
+     */
+    public function jsonSerialize()
+    {
+        return [
+            'id'    =>  $this->getId(),
+            'description'   =>  $this->getDescription()
+        ];
+    }
 }

tests/Entity/ScopeEntityTest.php

@@ -16,5 +16,7 @@ class ScopeTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals('foobar', $scope->getId());
         $this->assertEquals('barfoo', $scope->getDescription());
+
+        $this->assertTrue(is_array($scope->jsonSerialize()));
     }
 }