Generalized access token format

src/Entities/AccessTokenEntityInterface.php

@@ -22,4 +22,13 @@ interface AccessTokenEntityInterface extends TokenInterface
      * @return Token
      */
     public function convertToJWT(CryptKey $privateKey);
+
+    /**
+     * Generate a string representation from the access token
+     *
+     * @param CryptKey $privateKey
+     *
+     * @return string
+     */
+    public function getResponseString(CryptKey $privateKey);
 }

src/Entities/Traits/AccessTokenTrait.php

@@ -40,6 +40,18 @@ trait AccessTokenTrait
             ->getToken();
     }
 
+    /**
+     * Generate a string representation from the access token
+     *
+     * @param CryptKey $privateKey
+     *
+     * @return string
+     */
+    public function getResponseString(CryptKey $privateKey)
+    {
+        return (string) $this->convertToJWT($privateKey);
+    }
+
     /**
      * @return ClientEntityInterface
      */

src/Grant/ImplicitGrant.php

@@ -216,7 +216,7 @@ class ImplicitGrant extends AbstractAuthorizeGrant
                 $this->makeRedirectUri(
                     $finalRedirectUri,
                     [
-                        'access_token' => (string) $accessToken->convertToJWT($this->privateKey),
+                        'access_token' => $accessToken->getResponseString($this->privateKey),
                         'token_type'   => 'Bearer',
                         'expires_in'   => $accessToken->getExpiryDateTime()->getTimestamp() - (new \DateTime())->getTimestamp(),
                         'state'        => $authorizationRequest->getState(),

src/ResponseTypes/BearerTokenResponse.php

@@ -24,12 +24,10 @@ class BearerTokenResponse extends AbstractResponseType
     {
         $expireDateTime = $this->accessToken->getExpiryDateTime()->getTimestamp();
 
-        $jwtAccessToken = $this->accessToken->convertToJWT($this->privateKey);
-
         $responseParams = [
             'token_type'   => 'Bearer',
             'expires_in'   => $expireDateTime - (new \DateTime())->getTimestamp(),
-            'access_token' => (string) $jwtAccessToken,
+            'access_token' => $this->accessToken->getResponseString($this->privateKey),
         ];
 
         if ($this->refreshToken instanceof RefreshTokenEntityInterface) {

tests/Middleware/ResourceServerMiddlewareTest.php

@@ -30,7 +30,7 @@ class ResourceServerMiddlewareTest extends TestCase
         $accessToken->setExpiryDateTime((new \DateTime())->add(new \DateInterval('PT1H')));
         $accessToken->setClient($client);
 
-        $token = $accessToken->convertToJWT(new CryptKey('file://' . __DIR__ . '/../Stubs/private.key'));
+        $token = $accessToken->getResponseString(new CryptKey('file://' . __DIR__ . '/../Stubs/private.key'));
 
         $request = new ServerRequest();
         $request = $request->withHeader('authorization', sprintf('Bearer %s', $token));
@@ -65,7 +65,7 @@ class ResourceServerMiddlewareTest extends TestCase
         $accessToken->setExpiryDateTime((new \DateTime())->sub(new \DateInterval('PT1H')));
         $accessToken->setClient($client);
 
-        $token = $accessToken->convertToJWT(new CryptKey('file://' . __DIR__ . '/../Stubs/private.key'));
+        $token = $accessToken->getResponseString(new CryptKey('file://' . __DIR__ . '/../Stubs/private.key'));
 
         $request = new ServerRequest();
         $request = $request->withHeader('authorization', sprintf('Bearer %s', $token));