FakeTwitter

Companion demo app for reliable data uploading on iOS across four levels.

Structure

• FakeTwitter/FakeTwitter/Shared
• FakeTwitter/FakeTwitter/Level1
• FakeTwitter/FakeTwitter/Level2
• FakeTwitter/FakeTwitter/Level3
• FakeTwitter/FakeTwitter/Level4
• FakeTwitter/Server
• FakeTwitter/Server/src/levels/level1.js
• FakeTwitter/Server/src/levels/level2.js
• FakeTwitter/Server/src/levels/level3.js
• FakeTwitter/Server/src/levels/level4.js

Each tab reuses the same timeline/composer UI and injects a different upload service.

Run the local API

cd FakeTwitter/Server
npm install
npm start

Run the app

1. Open FakeTwitter/FakeTwitter.xcodeproj.
2. Run on iOS Simulator.
3. Ensure the server is running at http://localhost:8080.

If testing on a physical device, update FakeTwitter/FakeTwitter/Shared/Config/AppEnvironment.swift to your Mac's LAN IP, e.g. http://192.168.1.50:8080.

Level behavior

• Level 1: one-shot fire-and-forget upload.
• Level 2: Automatic vs Manual mode with optional toggles for retry caps and idempotency key.
• Level 3: resumable video upload with persisted offset + background URLSession chunk uploads.
  • In this sample, each chunk can continue in the background, but scheduling the next chunk happens when app code runs again.
• Level 4: durable SwiftData queue and state machine (pending/uploading/failed/succeeded) retried on launch.