landscape-template/api/modules/express-app.js

const express = require('express');
const session = require("express-session");
const passport = require("passport");
const lnurlAuth = require("passport-lnurl-auth");
var cors = require('cors');
const { SESSION_SECRET } = require('../utils/consts');
const createGlobalModule = require('../utils/createGlobalModule');
const sessionsStore = require('./sessions-store');

const createExpressApp = (router) => {

    const app = express();
    const routerBasePath = process.env.LOCAL ? `/dev` : `/.netlify/functions`

    app.use(cors({
        origin: ['http://localhost:3000', 'https://studio.apollographql.com'],
        credentials: true,
    }))

    app.use(session({
        secret: SESSION_SECRET,
        resave: false,
        store: sessionsStore,
        saveUninitialized: true,
        cookie: {
            maxAge: 30 * 24 * 60 * 60 * 1000 // 30 days
        }
    }));


    passport.use(new lnurlAuth.Strategy(function (linkingPublicKey, done) {
        // The user has successfully authenticated using lnurl-auth.
        // The linked public key is provided here.
        // You can use this as a unique reference for the user similar to a username or email address.
        const user = { id: linkingPublicKey };
        done(null, user);
    }));

    app.use(passport.initialize());
    app.use(passport.session());
    app.use(passport.authenticate("lnurl-auth"));
    passport.serializeUser(function (user, done) {
        done(null, user?.id);
    });
    passport.deserializeUser(function (id, done) {
        done(null, { id } || null);
    });

    if (router)
        app.use(routerBasePath, router);

    return app;
}


module.exports = createExpressApp;