Minor refactoring

client/routes/resources.js

@@ -1,11 +1,41 @@
 const express = require('express');
 const router = express.Router();
+const { v4: uuidv4 } = require('uuid');
+
+var themesMap = {};
 
-// TODO should be user selectable or at least configurable from configuration file
 var theme = "olympus";
-
 router.get('/theme/*', function (req, res, next) {
-    res.redirect(req.url.replace("theme", "themes/" + theme));
+    if (!req.cookies.id) {
+        const id = uuidv4();
+        res.cookie('id', id, { httpOnly: true });
+        themesMap[id] = "olympus";
+        reqTheme = "olympus";
+    }
+    else {
+        if (!(req.cookies.id in themesMap)) {
+            themesMap[req.cookies.id] = "olympus";
+        }
+        reqTheme = themesMap[req.cookies.id];
+    }
+    
+    /* Yes, this in an easter egg! :D Feel free to ignore it, or activate the parrot theme to check what it does */
+    if (reqTheme === "parrot" && !req.url.includes(".css"))
+        res.redirect('/themes/parrot/images/parrot.svg');
+    else
+        res.redirect(req.url.replace("theme", "themes/" + reqTheme));
+});
+
+router.put('/theme/:newTheme', function (req, res, next) {
+    const newTheme = req.params.newTheme;
+    if (req.cookies.id) {
+        themesMap[req.cookies.id] = newTheme;
+        console.log("Theme set to " + newTheme + " for session " + req.cookies.id);
+    } else {  
+        console.log("Failed to set theme to " + newTheme + ", no session id");
+    }
+
+    res.end("Ok");
 });
 
 module.exports = router;