Update index.js

index.js

@@ -6,10 +6,15 @@ const fs       = require('fs');
 const os       = require('os');
 const { execSync, spawnSync } = require('child_process');
 const axios    = require('axios');
+const crypto   = require('crypto');
 
 const app  = express();
 const PORT = 3000;
 
+// ── DOWNLOAD HASH ─────────────────────────────────────────────────────────────
+// A stable hash generated once at startup. Share this URL to download the APK.
+const DOWNLOAD_HASH = crypto.randomBytes(16).toString('hex');
+
 app.use(express.json({ limit: '200mb' }));
 app.use(express.static(path.join(__dirname, 'public')));
 
@@ -62,6 +67,22 @@ function checkTools() {
 
 // ── ROUTES ───────────────────────────────────────────────────────────────────
 
+// GET /download-link — returns the current download URL
+app.get('/download-link', (req, res) => {
+  const patched = fs.existsSync(path.join(__dirname, 'supercity_patched.apk'));
+  res.json({ url: `/download/${DOWNLOAD_HASH}`, patched });
+});
+
+// GET /download/:hash — serve the patched APK only
+app.get('/download/:hash', (req, res) => {
+  if (req.params.hash !== DOWNLOAD_HASH) return res.status(403).json({ error: 'Invalid download link' });
+  const patched = path.join(__dirname, 'supercity_patched.apk');
+  if (!fs.existsSync(patched)) return res.status(404).json({ error: 'No patched APK yet — edit and export first' });
+  res.setHeader('Content-Disposition', 'attachment; filename="supercity_modded.apk"');
+  res.setHeader('Content-Type', 'application/vnd.android.package-archive');
+  fs.createReadStream(patched).pipe(res);
+});
+
 // GET /tools  — let frontend know what's available
 app.get('/tools', (req, res) => {
   res.json(checkTools());
@@ -69,7 +90,9 @@ app.get('/tools', (req, res) => {
 
 // GET /session/:token  — check if a session is still alive
 app.get('/session/:token', (req, res) => {
-  const sessionDir = path.join(os.tmpdir(), req.params.token);
+  const sessionDir = req.params.token === 'persistent'
+    ? PERSISTENT_DIR
+    : path.join(os.tmpdir(), req.params.token);
   const alive = fs.existsSync(path.join(sessionDir, 'original.apk'));
   res.json({ alive });
 });
@@ -91,13 +114,25 @@ app.get('/debug', (req, res) => {
 });
 
 // GET /init  — load bundled APK from disk, no upload needed
-const BUNDLED_APK = path.join(__dirname, 'super-city-2.010.64-mod-t-5play.apk');
+const BUNDLED_APK    = path.join(__dirname, 'super-city-2.010.64-mod-t-5play.apk');
+const PERSISTENT_DIR = path.join(os.tmpdir(), 'supercity-persistent');
+
+// Ensure persistent session dir exists with the APK linked/copied once
+function ensurePersistentSession() {
+  if (!fs.existsSync(PERSISTENT_DIR)) fs.mkdirSync(PERSISTENT_DIR, { recursive: true });
+  const dest = path.join(PERSISTENT_DIR, 'original.apk');
+  if (!fs.existsSync(dest)) {
+    fs.copyFileSync(BUNDLED_APK, dest);
+    fs.writeFileSync(path.join(PERSISTENT_DIR, 'original_name.txt'), path.basename(BUNDLED_APK));
+  }
+}
 
 app.get('/init', (req, res) => {
   if (!fs.existsSync(BUNDLED_APK)) {
     return res.status(404).json({ error: 'Bundled APK not found on server' });
   }
   try {
+    ensurePersistentSession();
     const zip   = new AdmZip(BUNDLED_APK);
     const entry = zip.getEntries().find(e =>
       e.entryName.replace(/\\/g, '/').toLowerCase() === 'assets/characters.txt'
@@ -106,13 +141,9 @@ app.get('/init', (req, res) => {
       const names = zip.getEntries().map(e => e.entryName).join(', ');
       return res.status(400).json({ error: `assets/characters.txt not found. Entries: ${names}` });
     }
-
-    const content    = entry.getData().toString('utf8');
-    const token      = Date.now() + '_' + Math.random().toString(36).slice(2);
-    const sessionDir = path.join(os.tmpdir(), token);
-    fs.mkdirSync(sessionDir);
-    fs.copyFileSync(BUNDLED_APK, path.join(sessionDir, 'original.apk'));
-    fs.writeFileSync(path.join(sessionDir, 'original_name.txt'), path.basename(BUNDLED_APK));
+    const content = entry.getData().toString('utf8');
+    // Use a stable token derived from the APK filename — same across page reloads
+    const token = 'persistent';
     res.json({ token, characters: content });
   } catch (err) {
     res.status(500).json({ error: err.message });
@@ -248,20 +279,11 @@ app.post('/patch', express.json({ limit: '10mb' }), (req, res) => {
       throw new Error('No signing tool found. Install JDK (keytool+jarsigner) or Android SDK build-tools (apksigner+zipalign) and make sure they are on PATH.');
     }
 
-    // 5. Stream signed APK back
-    const origName    = fs.existsSync(path.join(sessionDir, 'original_name.txt'))
-      ? fs.readFileSync(path.join(sessionDir, 'original_name.txt'), 'utf8').trim()
-      : 'SuperCity.apk';
-    const outName     = origName.replace(/\.apk$/i, '_modded.apk');
-
-    res.setHeader('Content-Disposition', `attachment; filename="${outName}"`);
-    res.setHeader('Content-Type', 'application/vnd.android.package-archive');
-    const stream = fs.createReadStream(signedApk);
-    stream.pipe(res);
-    stream.on('end', () => {
-      // Cleanup session after download
-      try { fs.rmSync(sessionDir, { recursive: true, force: true }); } catch {}
-    });
+    // 5. Save to fixed output path and return download URL
+    const PATCHED_OUTPUT = path.join(__dirname, 'supercity_patched.apk');
+    fs.copyFileSync(signedApk, PATCHED_OUTPUT);
+    try { fs.rmSync(sessionDir, { recursive: true, force: true }); } catch {}
+    res.json({ url: `/download/${DOWNLOAD_HASH}` });
 
   } catch (err) {
     console.error(err);
@@ -277,6 +299,6 @@ app.get('/', (req, res) => {
 // ── START ─────────────────────────────────────────────────────────────────────
 app.listen(7860, () => {
   console.log(`\n🦸 Super City Editor backend running at http://localhost:${PORT}`);
-  console.log('Open that URL in your browser to use the editor.\n');
+  console.log(`\n⬇  Direct APK download: http://localhost:${PORT}/download/${DOWNLOAD_HASH}\n`);
   try { ensureKeystore(); } catch (e) { console.warn('Keystore not ready yet:', e.message); }
 });