Remove Stage name check on aggregate pipelines (#7237)

* add search for atlas search index

* added test for search in pipeline

* removed stage name check in pipeline

* removed spec for invalid query invalid key

* updated changelog

Co-authored-by: Diamond Lewis <findlewis@gmail.com>

CHANGELOG.md

@@ -23,6 +23,7 @@ ___
 - NEW: Supporting patterns in LiveQuery server's config parameter `classNames` [#7131](https://github.com/parse-community/parse-server/pull/7131). Thanks to [Nes-si](https://github.com/Nes-si)
 - NEW: `requireAnyUserRoles` and `requireAllUserRoles` for Parse Cloud validator. [#7097](https://github.com/parse-community/parse-server/pull/7097). Thanks to [dblythy](https://github.com/dblythy)
 - NEW: Support Facebook Limited Login [#7219](https://github.com/parse-community/parse-server/pull/7219). Thanks to [miguel-s](https://github.com/miguel-s)
+- IMPROVE: Removed Stage name check on aggregate pipelines [#7237](https://github.com/parse-community/parse-server/pull/7237). Thanks to [BRETT71](https://github.com/BRETT71)
 - IMPROVE: Retry transactions on MongoDB when it fails due to transient error [#7187](https://github.com/parse-community/parse-server/pull/7187). Thanks to [Antonio Davi Macedo Coelho de Castro](https://github.com/davimacedo).
 - IMPROVE: Bump tests to use Mongo 4.4.4 [#7184](https://github.com/parse-community/parse-server/pull/7184). Thanks to [Antonio Davi Macedo Coelho de Castro](https://github.com/davimacedo).
 - IMPROVE: Added new account lockout policy option `accountLockout.unlockOnPasswordReset` to automatically unlock account on password reset. [#7146](https://github.com/parse-community/parse-server/pull/7146). Thanks to [Manuel Trezza](https://github.com/mtrezza).

spec/AggregateRouter.spec.js

@@ -74,4 +74,15 @@ describe('AggregateRouter', () => {
       expect(e.message).toBe('Pipeline stages should only have one key found group, match');
     }
   });
+
+  it('get search pipeline from Pipeline Operator (Array)', () => {
+    const body = {
+      pipeline: {
+        search: {},
+      },
+    };
+    const expected = [{ $search: {} }];
+    const result = AggregateRouter.getPipeline(body);
+    expect(result).toEqual(expected);
+  });
 });

spec/ParseQuery.Aggregate.spec.js

@@ -83,18 +83,6 @@ describe('Parse.Query Aggregate testing', () => {
     );
   });
 
-  it('invalid query invalid key', done => {
-    const options = Object.assign({}, masterKeyOptions, {
-      body: {
-        unknown: {},
-      },
-    });
-    get(Parse.serverURL + '/aggregate/TestObject', options).catch(error => {
-      expect(error.error.code).toEqual(Parse.Error.INVALID_QUERY);
-      done();
-    });
-  });
-
   it('invalid query group _id', done => {
     const options = Object.assign({}, masterKeyOptions, {
       body: {

src/Routers/AggregateRouter.js

@@ -4,38 +4,6 @@ import * as middleware from '../middlewares';
 import Parse from 'parse/node';
 import UsersRouter from './UsersRouter';
 
-const BASE_KEYS = ['where', 'distinct', 'pipeline', 'hint', 'explain'];
-
-const PIPELINE_KEYS = [
-  'addFields',
-  'bucket',
-  'bucketAuto',
-  'collStats',
-  'count',
-  'currentOp',
-  'facet',
-  'geoNear',
-  'graphLookup',
-  'group',
-  'indexStats',
-  'limit',
-  'listLocalSessions',
-  'listSessions',
-  'lookup',
-  'match',
-  'out',
-  'project',
-  'redact',
-  'replaceRoot',
-  'sample',
-  'skip',
-  'sort',
-  'sortByCount',
-  'unwind',
-];
-
-const ALLOWED_KEYS = [...BASE_KEYS, ...PIPELINE_KEYS];
-
 export class AggregateRouter extends ClassesRouter {
   handleFind(req) {
     const body = Object.assign(req.body, ClassesRouter.JSONFromQuery(req.query));
@@ -122,9 +90,6 @@ export class AggregateRouter extends ClassesRouter {
   }
 
   static transformStage(stageName, stage) {
-    if (ALLOWED_KEYS.indexOf(stageName) === -1) {
-      throw new Parse.Error(Parse.Error.INVALID_QUERY, `Invalid parameter for query: ${stageName}`);
-    }
     if (stageName === 'group') {
       if (Object.prototype.hasOwnProperty.call(stage[stageName], '_id')) {
         throw new Parse.Error(