Setting cookie for cross-origin sites in Hono

import { Hono } from "hono";
import { client } from "../index.js";
import authenticateUser from "./auth.js";
import { setCookie } from "hono/cookie";

const loginRoute = new Hono();

loginRoute.post("", async (c) => {
  const body = await c.req.formData();

  const email = body.get("login-email") as string;
  const password = body.get("login-password") as string;

  try {
    const user_id = await checkCredentials(email, password);
    // Attach cookie
    setCookie(c, "user_id", user_id);
    c.status(201);
    return c.json({ message: "User has been successfully login !" });
  } catch (e) {
    if (e instanceof Error) {
      console.error(
        `An error occured while trying to login for the user: ${e.message}`
      );
      console.error(e.stack);
    }

    c.status(401);
    return c.json({ message: "Login unsuccessful !" });
  }
});

async function checkCredentials(email: string, password: string) {
  let res = await client.query(`SELECT * FROM users WHERE email = $1`, [email]);
  // check if email exist
  if (res.rows.length === 0) throw new Error("Email doesn't exist");
  const db_password = res.rows[0].password;
  // password matching
  if (password !== db_password) throw new Error("Password doesn't exist");
  const user_id = res.rows[0].user_id;

  // authenticate user
  await authenticateUser(user_id);
  return user_id;
}

export default loginRoute;