updated context

app/server/identity.ts

@@ -0,0 +1,39 @@
+import 'dotenv/config';
+import { Request, Response } from 'express';
+import jwt from 'jsonwebtoken';
+
+import { prisma } from './prisma/client';
+
+export interface IdentityContext {
+  identity?: {
+    id: string;
+    username: string;
+  };
+}
+
+export async function getIdentityContext({
+  req,
+  res
+}: {
+  req: Request;
+  res: Response;
+}): Promise<IdentityContext> {
+  const authHeader = req.headers.authorization;
+  if (authHeader == null) return {};
+  const token = authHeader.split(' ')[1];
+
+  const accessTokenSecret = process.env.ACCESS_TOKEN_SECRET;
+  if (accessTokenSecret == null) throw new Error('No `accessToken`.');
+
+  const decoded = jwt.verify(token, accessTokenSecret) as { userId: string };
+  const identity = await prisma.user.findUnique({
+    where: { id: decoded.userId },
+    select: {
+      id: true,
+      email: true,
+      username: true
+    }
+  });
+  if (identity == null) throw new Error("Couldn't find the user.");
+  return { identity };
+}