Add session handling and optional reCaptcha support

routes/index.js

@@ -1,9 +1,36 @@
 const express = require('express')
 const router = express.Router()
+const { RecaptchaV3 } = require('express-recaptcha')
+
+// --- Google ReCaptcha
+const site_key = process.env?.CAPTCHA_SITE_KEY
+const site_secret = process.env?.CAPTCHA_SITE_SECRET
+const captcha_enabled = (site_key !== undefined) && (site_secret !== undefined)
+const recaptcha = captcha_enabled ? new RecaptchaV3(site_key, site_secret, {
+  callback: 'cb'
+}) : undefined
 
 /* GET home page. */
-router.get('/', function (req, res) {
-  res.render('index', { title: 'TechnicFlux' })
+router.get('/', captcha_enabled ? recaptcha.middleware.render : (req, res, next) => {next()}, function (req, res) {
+  res.render('index', {
+    title: 'TechnicFlux',
+    captcha: captcha_enabled ? res.recaptcha : false
+  })
+})
+
+/* POST home page (login info w/ captcha) */
+router.post('/', captcha_enabled ? recaptcha.middleware.verify : (req, res, next) => {next()}, function (req, res) {
+  // Validate captcha, if enabled.
+  if (captcha_enabled && req.recaptcha.error) {
+    return res.render('index', {
+      title: 'TechnicFlux',
+      captcha: captcha_enabled ? res.recaptcha : false,
+      error: "Captcha validation failed! Ensure that javascript is enabled!"
+    })
+  }
+
+  // Check login info
+  res.json({success: "yay"})
 })
 
 module.exports = router