A high-performance Koa server that returns direct and 1-transfer train schedules between two stations. Data is loaded once at startup from the provided JSON files and kept in memory.

• Koa + TypeScript, fast in-memory lookups
• Reads SingleCityTrack.json and all {cityTrackId}.json files once at startup
• Supports direct trains and single-transfer solutions
• Sorts by total travel time (shortest first)
• Mobile-friendly UI with Tailwind CSS (via CDN)

• Node.js 18+
• yarn

For live-reload development:

# Start in dev mode (ts-node-dev)
 yarn run dev

To update the data files, replace the existing JSON files in the data/ directory with the new versions. Ensure that the filenames remain the same:

• SingleCityTrack.json
• {cityTrackId}.json (e.g., 239.json, 240.json, etc.)

yarn run update-data

# From the project root (the folder containing package.json)
# 1) Install dependencies
yarn install

# 2) Build TypeScript
yarn run build

# 3) Start the server
yarn start

The server will start at:

http://localhost:3000

• Endpoint: GET /train-schedule?start=起点站&end=终点站
• Example: http://localhost:3000/train-schedule?start=惠州北&end=肇庆

If any validation fails:

• Same station for start/end: Start and end stations cannot be the same.
• Station not found: One or both stations not found in the system.

• Data files expected under data/ at project root:
  • data/SingleCityTrack.json
  • data/239.json, data/240.json, data/241.json, data/242.json, data/243.json, data/244.json

• Time calculations assume same-day service; if an arrival/departure crosses midnight, the next-day wrap is handled simply by adding 24h when needed.
• One transfer is supported. If no matching timing is found, you may see only direct results or none.
• Tailwind CSS is included via CDN and does not require a build step.

1. 小金口 to 科韵路 departing at 12:40
2. 樟木头东 to 科韵路 departing at 07:30
3. 科韵路 to 清城 departing at 07:30
4. 小金口 to 白云机场南 departing at 07:00
5. 小金口 to 白云机场北 departing at 12:30 // 先反方向中转，再上快车
6. 竹料 to 科韵路 departing at 07:20