Add ability to create a new context with a req using `context.withR…

…equest` (#8013)

Co-authored-by: Daniel Cousens <413395+dcousens@users.noreply.github.com>

.changeset/tasty-lies-double.md

@@ -0,0 +1,5 @@
+---
+'@keystone-6/core': minor
+---
+
+Adds `context.withRequest`, a method to derive an updated context from an incoming request and response

packages/core/src/lib/context/createContext.ts

@@ -12,6 +12,7 @@ import { PrismaClient } from '../core/utils';
 import { InitialisedList } from '../core/types-for-lists';
 import { createImagesContext } from '../assets/createImagesContext';
 import { createFilesContext } from '../assets/createFilesContext';
+import { createSessionContext } from './session';
 import { getDbAPIFactory, itemAPIForList } from './itemAPI';
 
 export function makeCreateContext({
@@ -93,6 +94,13 @@ export function makeCreateContext({
           sudo,
           req,
         }),
+      withRequest: async (req, res) =>
+        createContext({
+          sessionContext: config.session
+            ? await createSessionContext(config.session, req, res, createContext)
+            : undefined,
+          req,
+        }),
       req,
       ...sessionContext,
       // Note: This field lets us use the server-side-graphql-client library.

packages/core/src/types/context.ts

@@ -1,4 +1,4 @@
-import { IncomingMessage } from 'http';
+import { IncomingMessage, ServerResponse } from 'http';
 import { Readable } from 'stream';
 import { GraphQLSchema, ExecutionResult, DocumentNode } from 'graphql';
 import { TypedDocumentNode } from '@graphql-typed-document-node/core';
@@ -14,6 +14,7 @@ export type KeystoneContext<TypeInfo extends BaseKeystoneTypeInfo = BaseKeystone
   sudo: () => KeystoneContext<TypeInfo>;
   exitSudo: () => KeystoneContext<TypeInfo>;
   withSession: (session: any) => KeystoneContext<TypeInfo>;
+  withRequest: (req: IncomingMessage, res: ServerResponse) => Promise<KeystoneContext<TypeInfo>>;
   prisma: TypeInfo['prisma'];
   files: FilesContext;
   images: ImagesContext;