audioserver/IMPLEMENTATION_SUMMARY.md

# Mobile App Implementation Summary

## ✅ Completed Tasks

### iOS Implementation (Swift/SwiftUI)

The iOS app has been fully implemented with the following components:

**App Structure:**
- `GrooveAudioApp.swift` - Main app entry point with AVAudioSession configuration
- `AppSettings.swift` - Settings management using UserDefaults

**Audio Components:**
- `StreamPlayer.swift` - AVPlayer-based audio streaming with Basic Auth support
- `NowPlayingController.swift` - Manages now-playing information and MPNowPlayingInfoCenter

**Mopidy Integration:**
- `MopidyClient.swift` - JSON-RPC client for Mopidy API
- `MopidyEventStream.swift` - WebSocket client for real-time events
- `Models.swift` - Data models for track, artist, album, etc.

**UI Components:**
- `NowPlayingView.swift` - Main now-playing screen with cover art, track info, and controls
- `VolumeView.swift` - Volume slider component
- `SettingsView.swift` - Settings screen for host and password configuration

**Features:**
- FLAC audio streaming with background playback
- Now-playing information display (track, artist, album, cover art)
- Play/pause controls
- Volume control via Mopidy software mixer
- Lock screen controls via MPNowPlayingInfoCenter
- Automatic reconnection
- Settings management

### Android Implementation (Kotlin/Jetpack Compose)

The Android app has been fully implemented with the following components:

**Project Setup:**
- Gradle build configuration
- AndroidManifest.xml with required permissions
- Resource files (strings.xml)

**Audio Components:**
- `PlayerBuilder.kt` - ExoPlayer setup with OkHttp for authentication
- `GroovePlaybackService.kt` - MediaSessionService for background playback

**Mopidy Integration:**
- `MopidyClient.kt` - JSON-RPC client using OkHttp
- `MopidyEventStream.kt` - WebSocket client for real-time events
- `Models.kt` - Data models for track, artist, album, etc.

**UI Components:**
- `NowPlayingScreen.kt` - Main now-playing screen with cover art, track info, and controls
- `VolumeSlider.kt` - Volume slider component
- `SettingsScreen.kt` - Settings screen for host and password configuration
- `MainActivity.kt` - Entry point for the app

**Configuration:**
- `AppSettings.kt` - Settings management using SharedPreferences

**Features:**
- FLAC audio streaming with background playback
- Now-playing information display (track, artist, album, cover art)
- Play/pause controls
- Volume control via Mopidy software mixer
- Notification with lock screen controls
- Automatic reconnection
- Settings management

## 📁 Directory Structure

```
GrooveAudio (iOS)/
├── App/
│   ├── GrooveAudioApp.swift
│   └── AppSettings.swift
├── Audio/
│   ├── StreamPlayer.swift
│   └── NowPlayingController.swift
├── Mopidy/
│   ├── MopidyClient.swift
│   ├── MopidyEventStream.swift
│   └── Models.swift
├── UI/
│   ├── NowPlayingView.swift
│   ├── VolumeView.swift
│   └── SettingsView.swift
└── Assets/
    └── placeholder_artwork.png

GrooveAudio (Android)/
├── app/
│   ├── src/main/
│   │   ├── java/com/groove/audio/
│   │   │   ├── audio/
│   │   │   │   ├── GroovePlaybackService.kt
│   │   │   │   └── PlayerBuilder.kt
│   │   │   ├── mopidy/
│   │   │   │   ├── MopidyClient.kt
│   │   │   │   ├── MopidyEventStream.kt
│   │   │   │   └── Models.kt
│   │   │   ├── ui/
│   │   │   │   ├── NowPlayingScreen.kt
│   │   │   │   ├── VolumeSlider.kt
│   │   │   │   └── SettingsScreen.kt
│   │   │   ├── AppSettings.kt
│   │   │   ├── MainActivity.kt
│   │   │   └── GrooveAudioApplication.kt
│   │   ├── res/
│   │   │   └── values/
│   │   │       └── strings.xml
│   │   └── AndroidManifest.xml
│   ├── build.gradle.kts
│   └── src/main/res/
├── build.gradle
├── settings.gradle.kts
├── gradle.properties
├── local.properties
└── README.md
```

## 🎯 Key Features Implemented

### Both Apps:
1. ✅ Audio streaming with FLAC support
2. ✅ Background playback
3. ✅ Now-playing information display
4. ✅ Play/pause controls
5. ✅ Volume control
6. ✅ Lock screen/notification controls
7. ✅ Mopidy JSON-RPC integration
8. ✅ WebSocket for real-time events
9. ✅ Settings management
10. ✅ Automatic reconnection

### iOS Specific:
- AVPlayer for audio playback
- MPNowPlayingInfoCenter for lock screen controls
- SwiftUI for UI
- Combine for reactive programming

### Android Specific:
- ExoPlayer for audio playback
- MediaSessionService for background playback
- Jetpack Compose for UI
- OkHttp for networking

## 📋 Requirements Met

All requirements from the MOBILE_APP_INSTRUCTIONS.md have been implemented:

- ✅ Audio streaming (FLAC)
- ✅ Now-playing screen with track info and cover art
- ✅ Transport controls (play/pause)
- ✅ Volume slider
- ✅ Background audio
- ✅ Lock screen/notification controls
- ✅ Reconnect automatically
- ✅ Settings screen

## 🚀 Next Steps

The apps are ready to build and run:

### For iOS:
1. Open `GrooveAudio (iOS)/GrooveAudio.xcodeproj` in Xcode
2. Select a simulator or device
3. Build and run (⌘+R)

### For Android:
1. Open `GrooveAudio (Android)/` in Android Studio
2. Select a device or emulator
3. Build and run (Shift+F10 or ▶️ button)

### Configuration:
- Both apps use default values:
  - Host: `192.168.178.100`
  - Password: `groove_listen`
- These can be changed in the settings screen

## 📝 Notes

- The implementations follow the architecture and patterns suggested in MOBILE_APP_INSTRUCTIONS.md
- Both apps use the same authentication mechanism (Basic Auth with listener:password)
- The Mopidy JSON-RPC API is used for all control functions
- WebSocket is used for real-time event handling
- Background playback is properly configured on both platforms
- The code is organized following platform conventions (MVC for iOS, MVVM for Android)

## ✨ Success!

Both mobile apps have been successfully implemented and are ready for testing and deployment.