NovaSonic/README.md

# NovaSonic

A self-hosted music streaming PWA and Android app for Navidrome / Subsonic-compatible servers.  
Built with Vite + vanilla ES modules (web) and Jetpack Compose + Media3/ExoPlayer (Android).

---

## Features

### Music Library
- Stream music from your Navidrome / Subsonic library
- Browse artists, albums, playlists, starred tracks, genres, and random picks
- Search across songs, albums, and artists
- Star and context menu on every song row
- Play count display (optional)

### Lyrics
- Synced and plain lyrics via lrclib.net, auto-fetched per track
- Fallback chain: exact match → no-duration match → fuzzy artist+title search → title-only search
- In-memory cache per session

### Artist Pages
- Hero card with artist photo and blurred background
- Bio, similar artists, top songs from Last.fm
- Concert events via Ticketmaster
- Albums cross-referenced against iTunes catalog — shows downloaded vs. missing tracks
- Artist cards with images in search results

### Playback
- Queue with shuffle, repeat (all / one), and radio mode (endless similar songs)
- Now Playing overlay with synced lyrics, queue view, star, and multi-artist links
- Gapless-style playback — next track pre-buffered before current track ends
- Lock screen / notification media controls
- Scrobbling to Navidrome (configurable delay)

### Discovery
- iTunes / Last.fm — charts, global search, 30-second previews, similar artists
- Song Importer — paste a Spotify, YouTube, YouTube Music, or SoundCloud link to download

### Downloads
- Download tracks, albums, or entire artists from YouTube Music / SoundCloud / Spotify via yt-dlp
- iTunes metadata enrichment — album art, year, track number, genre
- Duplicate detection, standard folder/filename structure

### Metadata Editor
- Edit tags (title, artist, album, genre, year, track, disc, cover art)
- File renamed and moved automatically; Navidrome rescan triggered on save

### Playlists
- Create, rename, and delete playlists
- Add tracks via "Add to Playlist" context menu
- Remove tracks from a playlist (edit mode on Android; inline on Web)
- Cover image upload (Web + Android)

### Audiobookshelf Integration
- Browse libraries and audiobooks on both Web and Android
- Stream audiobooks with chapter-by-chapter navigation
- Playback speed control (0.5× – 2.0×)
- Sleep timer
- Progress sync — current position saved back to ABS server every 30 s
- Chapter track mode — progress bar shows current chapter length instead of full book (toggle in Settings)
- Tab/section hidden until ABS is configured in Settings

### App — Web PWA
- Installable on Android / iOS / desktop
- Multiple color themes, German UI

### App — Android (native Jetpack Compose)
- Media3 / ExoPlayer backend
- OS notification with playback controls
- ABS audiobook notification: chapter name shown as title, book title as artist; extra buttons — Kapitel zurück | 30s zurück | Play/Pause | 30s vor | Kapitel vor (compact + expanded)
- Last played song shown in mini player bar on restart; tap to resume
- Full playlist management: create, rename (with description), delete, remove tracks, cover upload

---

## Project Structure

```
NovaSonic/
├── src/
│   ├── player/
│   │   ├── player.js          # Playback, queue, transport, media session, preload
│   │   └── nowplaying.js      # Now Playing overlay + synced lyrics
│   ├── views/
│   │   ├── detail.js          # Artist / album detail pages
│   │   ├── views.js           # Navigation, page loaders, search
│   │   ├── events.js          # Ticketmaster concert events
│   │   ├── home.js            # Home page
│   │   ├── search.js          # Search, artist/album navigation
│   │   ├── playlists.js       # Playlist management
│   │   ├── spotify.js         # Spotify importer
│   │   ├── youtube.js         # YouTube importer
│   │   ├── soundcloud.js      # SoundCloud importer
│   │   ├── navigation.js      # Client-side router
│   │   └── abs.js             # Audiobookshelf integration
│   ├── ui/
│   │   ├── ui.js              # Modals, sidebar, context menu
│   │   ├── components.js      # Song rows, cards, shared UI
│   │   ├── downloads.js       # Download modal + job tracker
│   │   ├── metadata.js        # Metadata editor
│   │   ├── modals.js          # Song info, events modals
│   │   ├── notify.js          # Toast notifications
│   │   └── settings.js        # Settings page
│   ├── state.js               # Shared mutable state (S object)
│   ├── utils.js               # Helpers (md5, esc, formatDur, toast)
│   ├── api.js                 # Subsonic API, iTunes API, cover art
│   └── main.js                # App init, audio wiring, window globals
├── backend/
│   ├── novasonic-server.js    # Express API: downloads, metadata, events proxy, ABS proxy
│   └── lib/
│       ├── config.js          # Env var → config object
│       ├── jobs.js            # In-memory download job store
│       ├── metadata.js        # iTunes lookup, artwork, filename helpers
│       ├── ytdlp.js           # yt-dlp download + ffmpeg metadata embedding
│       ├── downloader.js      # Unified downloadTrack / downloadAlbumTracks
│       └── romaji.js          # Japanese → romaji search index
├── android/                   # Native Android app (Jetpack Compose + Media3)
│   └── app/src/main/kotlin/com/novasonic/app/
│       ├── api/               # SubsonicClient, AbsClient, LrcLibClient, ItunesClient
│       ├── data/              # PrefsStore (DataStore), MusicRepository
│       ├── player/            # PlayerController, MusicService (Media3)
│       ├── ui/
│       │   ├── screen/        # HomeScreen, NowPlayingScreen, AbsScreen, SettingsScreen, …
│       │   ├── component/     # MiniPlayer, SongRow, SongContextSheet, …
│       │   └── theme/         # Color, Type, Theme
│       └── viewmodel/         # ViewModel per screen
├── public/
│   ├── sw.js                  # Service worker
│   ├── manifest.json          # PWA manifest
│   └── config.js              # Runtime config (generated by Docker entrypoint)
├── index.html
├── styles.css
├── vite.config.js
├── Dockerfile
├── docker-compose.yml
├── nginx.conf
└── docker-entrypoint.sh       # Injects NAVIDROME_URL / BACKEND_URL at runtime
```

---

## Setup

### 1. Clone and configure

```bash
git clone <repo>
cd NovaSonic
cp .env.example .env
```

Edit `.env`:

```env
NAVIDROME_URL=https://music.yourdomain.com
BACKEND_URL=https://novasonic-api.yourdomain.com

MUSIC_PATH=/srv/navidrome/music

AUDIO_FMT=mp3          # mp3 | flac | opus | best
AUDIO_QUALITY=0        # 0 = best (yt-dlp)
MAX_PARALLEL=2

TICKETMASTER_API_KEY=  # optional — free key from developer.ticketmaster.com
```

### 2. Start

```bash
docker compose up -d
```

Frontend on port 8080, backend on port 3700. Route both through your reverse proxy.

### 3. First launch

1. Enter your Navidrome server URL, username, and password
2. Optionally add a Last.fm API key in Settings for bios and recommendations
3. Optionally connect Audiobookshelf in Settings
4. Optionally add the NovaSonic backend URL in Settings to enable downloads

---

## Environment Variables

### Frontend container

| Variable | Description |
|---|---|
| `NAVIDROME_URL` | Pre-fills the Navidrome server URL on the login screen |
| `BACKEND_URL` | Pre-fills the download backend URL on the login screen |

### Backend container

| Variable | Default | Description |
|---|---|---|
| `PORT` | `3700` | Port the backend listens on |
| `MUSIC_PATH` | `/music` | Absolute path to your Navidrome music folder |
| `AUDIO_FMT` | `mp3` | Download format (`mp3`, `flac`, `opus`, `best`) |
| `AUDIO_QUALITY` | `0` | yt-dlp audio quality (0 = best) |
| `MAX_PARALLEL` | `2` | Max concurrent download jobs |
| `TICKETMASTER_API_KEY` | — | Free key from [developer.ticketmaster.com](https://developer.ticketmaster.com) |

---

## Development

```bash
npm install
npm run dev      # Vite dev server with HMR
npm run build    # Production build → dist/
npm run preview  # Preview the production build locally
```