209 lines
6.1 KiB
Markdown
209 lines
6.1 KiB
Markdown
# Dereth Tracker
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Dereth Tracker is a real-time telemetry service for the world of Dereth. It collects player data, stores it in a SQLite database, and provides a live map interface along with a sample data generator for testing.
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## Table of Contents
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- [Overview](#overview)
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- [Features](#features)
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- [Requirements](#requirements)
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- [Installation](#installation)
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- [Configuration](#configuration)
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- [Usage](#usage)
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- [API Reference](#api-reference)
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- [Frontend](#frontend)
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- [Database Schema](#database-schema)
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- [Contributing](#contributing)
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## Overview
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This project provides:
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- A FastAPI backend with endpoints for receiving and querying telemetry data.
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- SQLite-based storage for snapshots and live state.
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- A live, interactive map using static HTML, CSS, and JavaScript.
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- A sample data generator script (`generate_data.py`) for simulating telemetry snapshots.
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## Features
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- **WebSocket /ws/position**: Stream telemetry snapshots (protected by a shared secret).
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- **GET /live**: Fetch active players seen in the last 30 seconds.
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- **GET /history**: Retrieve historical telemetry data with optional time filtering.
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- **GET /debug**: Health check endpoint.
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- **Live Map**: Interactive map interface with panning, zooming, and sorting.
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- **Sample Data Generator**: `generate_data.py` sends telemetry snapshots over WebSocket for testing.
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## Requirements
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- Python 3.9 or newer
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- pip
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- (Optional) virtual environment tool (venv)
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Python packages:
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- fastapi
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- uvicorn
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- pydantic
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- pandas
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- matplotlib
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- websockets # required for sample data generator
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## Installation
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1. Clone the repository:
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```bash
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git clone https://github.com/yourusername/dereth-tracker.git
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cd dereth-tracker
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```
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2. Create and activate a virtual environment:
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```bash
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python3 -m venv venv
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source venv/bin/activate # Windows: venv\Scripts\activate
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```
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3. Install dependencies:
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```bash
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pip install fastapi uvicorn pydantic pandas matplotlib websockets
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```
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## Configuration
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- Update the `SHARED_SECRET` in `main.py` to match your plugin (default: `"your_shared_secret"`).
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- The SQLite database file `dereth.db` is created in the project root. To change the path, edit `DB_FILE` in `db.py`.
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- To limit the maximum database size, set the environment variable `DB_MAX_SIZE_MB` (default: 2048 MB).
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## Usage
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Start the server using Uvicorn:
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```bash
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uvicorn main:app --reload --host 0.0.0.0 --port 8000
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```
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## NGINX Proxy Configuration
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If you cannot reassign the existing `/live` and `/trails` routes, you can namespace this service under `/api` (or any other prefix) and configure NGINX accordingly. Be sure to forward WebSocket upgrade headers so that `/ws/live` and `/ws/position` continue to work. Example:
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```nginx
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location /api/ {
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proxy_pass http://127.0.0.1:8765/;
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proxy_http_version 1.1;
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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# WebSocket support
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection "upgrade";
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proxy_cache_bypass $http_upgrade;
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}
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```
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Then the browser client (static/script.js) will fetch `/api/live/` and `/api/trails/` to reach this new server.
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- Live Map: `http://localhost:8000/` (or `http://<your-domain>/api/` if behind a prefix)
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### Frontend Configuration
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- In `static/script.js`, the constant `API_BASE` controls where live/trails data and WebSocket `/ws/live` are fetched. By default:
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```js
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const API_BASE = '/api';
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```
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Update `API_BASE` if you mount the service under a different path or serve it at root.
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### Debugging WebSockets
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- Server logs now print every incoming WebSocket frame in `main.py`:
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- `[WS-PLUGIN RX] <client>: <raw-payload>` for plugin messages on `/ws/position`
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- `[WS-LIVE RX] <client>: <parsed-json>` for browser messages on `/ws/live`
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- Use these logs to verify messages and troubleshoot handshake failures.
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### Styling Adjustments
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- Chat input bar is fixed at the bottom of the chat window (`.chat-form { position:absolute; bottom:0; }`).
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- Input text and placeholder are white for readability (`.chat-input, .chat-input::placeholder { color:#fff; }`).
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- Incoming chat messages forced white via `.chat-messages div { color:#fff !important; }`.
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## API Reference
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### WebSocket /ws/position
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Stream telemetry snapshots over a WebSocket connection. Provide your shared secret either as a query parameter or WebSocket header:
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```
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ws://<host>:<port>/ws/position?secret=<shared_secret>
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```
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or
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```
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X-Plugin-Secret: <shared_secret>
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```
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After connecting, send JSON messages matching the `TelemetrySnapshot` schema. For example:
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```json
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{
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"type": "telemetry",
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"character_name": "Dunking Rares",
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"char_tag": "moss",
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"session_id": "dunk-20250422-xyz",
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"timestamp": "2025-04-22T13:45:00Z",
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"ew": 123.4,
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"ns": 567.8,
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"z": 10.2,
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"kills": 42,
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"deaths": 1,
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"rares_found": 2,
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"prismatic_taper_count": 17,
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"vt_state": "Combat",
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"kills_per_hour": "N/A",
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"onlinetime": "00:05:00"
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}
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```
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### Chat messages
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You can also send chat envelopes over the same WebSocket to display messages in the browser. Fields:
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- `type`: must be "chat"
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- `character_name`: target player name
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- `text`: message content
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- `color` (optional): CSS color string (e.g. "#ff8800"); if sent as an integer (0xRRGGBB), it will be converted to hex.
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Example chat payload:
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```json
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{
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"type": "chat",
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"character_name": "MyCharacter",
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"text": "Hello world!",
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"color": "#88f"
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}
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```
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### GET /live
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Returns active players seen within the last 30 seconds:
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```json
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{
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"players": [ { ... } ]
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}
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```
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### GET /history
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Retrieve historical snapshots with optional `from` and `to` ISO8601 timestamps:
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```
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GET /history?from=2025-04-22T12:00:00Z&to=2025-04-22T13:00:00Z
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```
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Response:
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```json
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{
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"data": [ { ... } ]
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}
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```
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## Frontend
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- **Live Map**: `static/index.html` – Real-time player positions on a map.
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## Database Schema
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- **telemetry_log**: Stored history of snapshots.
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- **live_state**: Current snapshot per character (upserted).
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## Contributing
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Contributions are welcome! Feel free to open issues or submit pull requests.
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