TOTP + Pushover

backend/src/store/instance.js

@@ -0,0 +1,40 @@
+import { promises as fs } from 'fs';
+import path from 'path';
+import { randomUUID } from 'crypto';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const backendDir = path.resolve(__dirname, '..', '..');
+const dataDir = path.join(backendDir, 'data');
+const dataFile = path.join(dataDir, 'instance.json');
+
+async function ensureDir() {
+  await fs.mkdir(dataDir, { recursive: true });
+}
+
+export async function createInstanceId() {
+  await ensureDir();
+  const instanceId = randomUUID();
+  const payload = {
+    instanceId,
+    startedAt: new Date().toISOString()
+  };
+  await fs.writeFile(dataFile, JSON.stringify(payload, null, 2), 'utf-8');
+  return payload;
+}
+
+export async function readInstanceId() {
+  await ensureDir();
+  try {
+    const raw = await fs.readFile(dataFile, 'utf-8');
+    const parsed = JSON.parse(raw);
+    if (parsed?.instanceId) {
+      return parsed;
+    }
+  } catch {
+    // ignore and recreate below
+  }
+  return createInstanceId();
+}
+