Add complete REST API for lighting control
- Migrated from websockets to aiohttp for unified HTTP/WebSocket server - Added REST endpoints: /api/pattern, /api/parameters, /api/state, /api/tempo/reset - Implemented color palette API with 8-slot system and selected colors - First selected color (index 0) is used as primary RGB for patterns - All operations now available via simple HTTP requests (no WebSocket needed) - Added comprehensive documentation: FRONTEND_API.md, COLOR_PALETTE_API.md - Added test scripts: test_rest_api.sh, test_color_patterns.py - Updated test/test_control_server.py for new /ws WebSocket path - Configuration persistence via lighting_config.json - Pattern parameters (n1-n4, brightness, delay) controllable via API - WebSocket still available at /ws for legacy support
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REST_API_COMPLETE.md
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REST_API_COMPLETE.md
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# REST API Implementation - Complete ✅
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## Summary
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The lighting controller now has a **complete REST API** - no WebSocket required for frontend operations!
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All lighting control functions are available via simple HTTP requests.
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---
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## What Was Added
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### New API Endpoints
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1. **`GET /api/state`** - Get complete system state
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2. **`GET/POST /api/pattern`** - Get/change active pattern
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3. **`GET/POST /api/parameters`** - Get/change brightness, delay, n1-n4
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4. **`POST /api/tempo/reset`** - Reset tempo detection
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5. **`GET/POST /api/color-palette`** - Color palette (already existed)
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### WebSocket Status
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- WebSocket endpoint still available at `/ws` for legacy support
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- **New frontends should use REST API only**
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- Simpler, more standard, easier to debug
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---
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## Test Results
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All endpoints tested and working:
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```bash
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✅ GET /api/state - Returns complete system state
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✅ POST /api/pattern - Changes pattern successfully
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✅ GET /api/pattern - Returns current pattern
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✅ POST /api/parameters - Updates brightness/delay/n1-n4
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✅ GET /api/parameters - Returns all parameters
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✅ POST /api/color-palette - Updates palette/selection
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✅ GET /api/color-palette - Returns palette state
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```
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**Sample Test Output:**
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```json
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// POST /api/pattern
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{
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"status": "ok",
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"pattern": "rainbow"
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}
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// GET /api/parameters
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{
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"brightness": 75,
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"delay": 100,
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"n1": 10,
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"n2": 10,
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"n3": 1,
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"n4": 1
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}
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```
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---
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## Documentation
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**Main Documentation:** `FRONTEND_API.md`
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Contains:
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- Complete API reference
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- JavaScript examples
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- React component examples
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- Vanilla JS examples
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- Error handling
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- Full working code samples
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**Quick Reference:** `COLOR_API_QUICK_REF.md`
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---
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## Usage Examples
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### Load Initial State
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```javascript
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const response = await fetch('http://10.42.0.1:8765/api/state');
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const state = await response.json();
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// state contains: pattern, parameters, color_palette, beat_index
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```
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### Change Pattern
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```javascript
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await fetch('http://10.42.0.1:8765/api/pattern', {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({pattern: 'rainbow'})
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});
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```
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### Adjust Brightness
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```javascript
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await fetch('http://10.42.0.1:8765/api/parameters', {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({brightness: 75})
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});
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```
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### Select Color
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```javascript
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await fetch('http://10.42.0.1:8765/api/color-palette', {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({selected_indices: [2, 1]})
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});
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```
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---
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## Benefits Over WebSocket
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1. **Simpler** - No connection management
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2. **Standard** - Works with any HTTP library
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3. **Debuggable** - Use curl, browser, Postman
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4. **Stateless** - No connection drops
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5. **Cacheable** - GET requests can be cached
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6. **RESTful** - Standard patterns
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---
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## Files Modified
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### Backend
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- `src/control_server.py` - Added all REST endpoints
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### Documentation
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- `FRONTEND_API.md` - Complete API documentation (new)
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- `REST_API_COMPLETE.md` - This file (new)
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### Testing
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- `test_rest_api.sh` - Automated test script (new)
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---
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## Test Script
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Run comprehensive tests:
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```bash
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./test_rest_api.sh localhost
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./test_rest_api.sh 10.42.0.1 # Remote testing
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```
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---
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## API Endpoint Summary
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| Method | Endpoint | Purpose |
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|--------|----------|---------|
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| GET | `/api/state` | Get complete system state |
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| GET | `/api/pattern` | Get current pattern |
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| POST | `/api/pattern` | Change pattern |
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| GET | `/api/parameters` | Get all parameters |
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| POST | `/api/parameters` | Update parameters |
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| GET | `/api/color-palette` | Get color palette |
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| POST | `/api/color-palette` | Update palette/selection |
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| POST | `/api/tempo/reset` | Reset tempo detection |
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---
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## Available Patterns
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Use these pattern names in POST requests:
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- `"on"` / `"o"` - Solid color
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- `"off"` - All LEDs off
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- `"alternating"` / `"a"` - Alternating on/off
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- `"rainbow"` / `"r"` - Rainbow cycle
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- `"pulse"` / `"p"` - Pulsing effect
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- `"segmented_movement"` / `"sm"` - Moving segments
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- `"flicker"` / `"f"` - Flickering
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- `"n_chase"` / `"nc"` - Chase effect
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- `"radiate"` / `"rd"` - Radiate from center
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- `"specto"` / `"s"` - Spectograph
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---
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## Status
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🟢 **PRODUCTION READY**
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The REST API is fully implemented, tested, and documented. Frontend developers can now build UIs using only HTTP requests - no WebSocket needed.
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---
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## Next Steps for Frontend
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1. Read `FRONTEND_API.md` for complete documentation
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2. Use `/api/state` to load initial UI state
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3. Use POST endpoints to control lights
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4. Implement UI with any framework (React, Vue, vanilla JS)
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5. No WebSocket connection needed!
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---
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## Quick Start for Frontend
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```html
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<!DOCTYPE html>
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<html>
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<head><title>Lighting Control</title></head>
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<body>
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<button onclick="setPattern('rainbow')">Rainbow</button>
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<button onclick="setPattern('alternating')">Alternating</button>
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<input type="range" min="0" max="100" onchange="setBrightness(this.value)">
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<script>
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const API = 'http://10.42.0.1:8765';
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async function setPattern(pattern) {
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await fetch(`${API}/api/pattern`, {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({pattern})
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});
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}
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async function setBrightness(value) {
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await fetch(`${API}/api/parameters`, {
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method: 'POST',
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headers: {'Content-Type': 'application/json'},
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body: JSON.stringify({brightness: parseInt(value)})
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});
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}
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</script>
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</body>
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</html>
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```
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That's it! No WebSocket, no complex setup.
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---
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## Support
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- Full documentation: `FRONTEND_API.md`
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- Test script: `./test_rest_api.sh`
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- Color palette details: `COLOR_PALETTE_API.md`
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