back-end-fp-composed-request-logic.js

async function getUserFromDatabase(ctx) {
  const {
    req: {
      headers: {Authorization: userCred},
    },
  } = ctx;
  const user = await db.getUserByCredential(userCred);
  return {
    ...ctx,
    user,
  };
}

async function sendMessageToUser(ctx) {
  const {user} = ctx;
  await messaging.sendToUser(user.username, 'hello');
  return ctx;
}

async function replyOk(ctx) {
  const {user} = ctx;
  const {res} = ctx;
  res.status(200).send(`Ok ${user.username}`);
  return ctx;
}