GraphQL Configuration Options (#5782)

* add parse-graph-ql configuration for class schema customisation

Not yet tested - essentially an RFC

* refactor and add graphql router, controller and config cache

* fix(GraphQLController): add missing check isEnabled

* chore(GraphQLController): remove awaits from cache put

* chore(GraphQLController): remove check for if its enabled

* refactor(GraphQLController): only use cache if mounted

* chore(GraphQLController): group all validation errors and throw at once

* chore(GraphQLSchema): move transformations into controller validation

* refactor(GraphQL): improve ctrl validation and fix schema usage of config

* refactor(GraphQLSchema): remove code related to additional schema

This code has been moved into a separate feature branch.

* fix(GraphQLSchema): fix incorrect default return type for class configs

* refactor(GraphQLSchema): update staleness check code to account for config

* fix(GraphQLServer): fix regressed tests due to internal schema changes

This will be followed up with a backwards compatability fix for the `ClassFields` issue to avoid breakages for our users

* refactor: rename to ParseGraphQLController for consistency

* fix(ParseGraphQLCtrl): numerous fixes for validity checking

Also includes some minor code refactoring

* chore(GraphQL): minor syntax cleanup

* fix(SchemaController): add _GraphQLConfig to volatile classes

* refactor(ParseGraphQLServer): return update config value in setGraphQLConfig

* testing(ParseGraphQL): add test cases for new graphQLConfig

* fix(GraphQLController): fix issue where config with multiple items was not being mapped to the db

* fix(postgres): add _GraphQLConfig default schema on load

fixes failing postgres tests

* GraphQL @mock directive (#5836)

* Add mock directive
* Include tests for @mock directive

* Fix existing tests due to the change from ClassFields to ClassCreateFields

* fix(parseClassMutations): safer type transformation based on input type

* fix(parseClassMutations): only define necessary input fields

* fix(GraphQL): fix incorrect import paths

src/Controllers/SchemaController.js

@@ -132,6 +132,10 @@ const defaultColumns: { [string]: SchemaFields } = Object.freeze({
     objectId: { type: 'String' },
     params: { type: 'Object' },
   },
+  _GraphQLConfig: {
+    objectId: { type: 'String' },
+    config: { type: 'Object' },
+  },
   _Audience: {
     objectId: { type: 'String' },
     name: { type: 'String' },
@@ -163,6 +167,7 @@ const volatileClasses = Object.freeze([
   '_PushStatus',
   '_Hooks',
   '_GlobalConfig',
+  '_GraphQLConfig',
   '_JobSchedule',
   '_Audience',
 ]);
@@ -475,6 +480,10 @@ const _GlobalConfigSchema = {
   className: '_GlobalConfig',
   fields: defaultColumns._GlobalConfig,
 };
+const _GraphQLConfigSchema = {
+  className: '_GraphQLConfig',
+  fields: defaultColumns._GraphQLConfig,
+};
 const _PushStatusSchema = convertSchemaToAdapterSchema(
   injectDefaultSchema({
     className: '_PushStatus',
@@ -509,6 +518,7 @@ const VolatileClassesSchemas = [
   _JobScheduleSchema,
   _PushStatusSchema,
   _GlobalConfigSchema,
+  _GraphQLConfigSchema,
   _AudienceSchema,
 ];