feat: add backend proxy endpoints for sticker wall retrieval and rendering

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/routes/stickerwalls.js

@@ -0,0 +1,60 @@
+const express = require('express');
+const { authenticateToken } = require('../middleware/auth');
+
+const router = express.Router();
+
+const VOTE_APP_URL = process.env.VOTE_APP_URL;
+const VOTE_APP_API_KEY = process.env.VOTE_APP_API_KEY;
+
+router.get('/:sessionId', authenticateToken, async (req, res) => {
+  const { sessionId } = req.params;
+  if (!VOTE_APP_URL) {
+    return res.status(503).json({ error: 'Vote app not configured' });
+  }
+
+  try {
+    const upstream = await fetch(`${VOTE_APP_URL}/stickerwalls/${sessionId}.png`);
+    if (!upstream.ok) {
+      return res.status(upstream.status).end();
+    }
+    res.set('Content-Type', 'image/png');
+    const cacheControl = upstream.headers.get('cache-control');
+    if (cacheControl) {
+      res.set('Cache-Control', cacheControl);
+    }
+    const buffer = Buffer.from(await upstream.arrayBuffer());
+    res.send(buffer);
+  } catch (err) {
+    console.error('Sticker wall GET proxy error:', err.message);
+    res.status(502).json({ error: 'Failed to fetch sticker wall' });
+  }
+});
+
+router.post('/:sessionId/render', authenticateToken, async (req, res) => {
+  const { sessionId } = req.params;
+  if (!VOTE_APP_URL || !VOTE_APP_API_KEY) {
+    return res.status(503).json({ error: 'Vote app not configured' });
+  }
+
+  try {
+    const upstream = await fetch(`${VOTE_APP_URL}/api/stickerwalls/${sessionId}/render`, {
+      method: 'POST',
+      headers: { 'X-API-Key': VOTE_APP_API_KEY },
+    });
+    if (!upstream.ok) {
+      return res.status(upstream.status).end();
+    }
+    res.set('Content-Type', 'image/png');
+    const rendered = upstream.headers.get('x-sticker-wall-rendered');
+    if (rendered) {
+      res.set('X-Sticker-Wall-Rendered', rendered);
+    }
+    const buffer = Buffer.from(await upstream.arrayBuffer());
+    res.send(buffer);
+  } catch (err) {
+    console.error('Sticker wall render proxy error:', err.message);
+    res.status(502).json({ error: 'Failed to render sticker wall' });
+  }
+});
+
+module.exports = router;

backend/server.js

@@ -27,6 +27,7 @@ const statsRoutes = require('./routes/stats');
 const pickerRoutes = require('./routes/picker');
 const votesRoutes = require('./routes/votes');
 const webhooksRoutes = require('./routes/webhooks');
+const stickerwallsRoutes = require('./routes/stickerwalls');
 
 app.use('/api/auth', authRoutes);
 app.use('/api/games', gamesRoutes);
@@ -35,6 +36,7 @@ app.use('/api/stats', statsRoutes);
 app.use('/api', pickerRoutes);
 app.use('/api/votes', votesRoutes);
 app.use('/api/webhooks', webhooksRoutes);
+app.use('/api/stickerwalls', stickerwallsRoutes);
 
 // Error handling middleware
 app.use((err, req, res, next) => {