Refactor code to no longer require xp-lang/xp-enums

This package is deprecated, see xp-framework/compiler#106

Author: thekid

composer.json

@@ -17,7 +17,6 @@
     "xp-forge/credentials": "^2.0",
     "xp-forge/google-authenticator": "^5.0",
     "xp-lang/php-compact-methods": "^1.0",
-    "xp-lang/xp-enums": "^1.0",
     "xp-lang/xp-records": "^1.0",
     "php" : ">=7.0.0"
   },

src/main/php/de/thekid/cas/impl/ServiceResponse.php

@@ -3,8 +3,8 @@
 use xml\{Tree, Node};
 
 /** CAS service response - in XML and JSON */
-abstract enum ServiceResponse {
-  XML {
+abstract class ServiceResponse {
+  public static $XML= new class() extends ServiceResponse {
     public function success($user) {
       $n= new Node('cas:authenticationSuccess')->withChild(new Node('cas:user', $user['username']));
       if (isset($user['attributes'])) {
@@ -29,8 +29,8 @@ public function transmit($response, $result) {
 
       $response->send($tree->getSource(INDENT_DEFAULT), 'text/xml');
     }
-  },
-  JSON {
+  };
+  public static $JSON= new class() extends ServiceResponse {
     public function success($user) {
       $success= ['user' => $user['username']];
       if (isset($user['attributes'])) {