auth-backend: move prepareBackstageIdentityResponse to auth-node

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/auth-backend/src/providers/prepareBackstageIdentityResponse.test.ts

@@ -1,41 +0,0 @@
-/*
- * Copyright 2020 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import { prepareBackstageIdentityResponse } from './prepareBackstageIdentityResponse';
-
-function mkToken(payload: unknown) {
-  return `a.${Buffer.from(JSON.stringify(payload), 'utf8').toString(
-    'base64',
-  )}.z`;
-}
-
-describe('prepareBackstageIdentityResponse', () => {
-  it('parses a complete token to determine the identity', () => {
-    const token = mkToken({ sub: 'k:ns/n', ent: ['k:ns/o'] });
-    expect(
-      prepareBackstageIdentityResponse({
-        token,
-      }),
-    ).toEqual({
-      token,
-      identity: {
-        type: 'user',
-        userEntityRef: 'k:ns/n',
-        ownershipEntityRefs: ['k:ns/o'],
-      },
-    });
-  });
-});

plugins/auth-backend/src/providers/prepareBackstageIdentityResponse.ts

@@ -14,39 +14,11 @@
  * limitations under the License.
  */
 
-import { InputError } from '@backstage/errors';
-import {
-  BackstageIdentityResponse,
-  BackstageSignInResult,
-} from '@backstage/plugin-auth-node';
-
-function parseJwtPayload(token: string) {
-  const [_header, payload, _signature] = token.split('.');
-  return JSON.parse(Buffer.from(payload, 'base64').toString());
-}
+import { prepareBackstageIdentityResponse as _prepareBackstageIdentityResponse } from '@backstage/plugin-auth-node';
 
 /**
- * Parses a Backstage-issued token and decorates the
- * {@link @backstage/plugin-auth-node#BackstageIdentityResponse} with identity information sourced from the
- * token.
- *
  * @public
+ * @deprecated import from `@backstage/plugin-auth-node` instead
  */
-export function prepareBackstageIdentityResponse(
-  result: BackstageSignInResult,
-): BackstageIdentityResponse {
-  if (!result.token) {
-    throw new InputError(`Identity response must return a token`);
-  }
-
-  const { sub, ent } = parseJwtPayload(result.token);
-
-  return {
-    ...result,
-    identity: {
-      type: 'user',
-      userEntityRef: sub,
-      ownershipEntityRefs: ent ?? [],
-    },
-  };
-}
+export const prepareBackstageIdentityResponse =
+  _prepareBackstageIdentityResponse;