# Mulita - Self-Hosted Photo Management Application

A self-hosted, Docker-deployed photo management application inspired by Lightroom's workflow. Mulita provides a fast, keyboard-driven interface to browse, organize, tag, and manage your photo library.

## Features

- **Photo Organization**: Browse photos in a timeline view with virtual scrolling for performance
- **Thumbnail Generation**: Automatic thumbnail generation for all photo formats including RAW
- **Metadata Extraction**: Full EXIF/XMP metadata extraction and search
- **Keyboard Shortcuts**: Lightroom-style keyboard navigation and actions
- **File Support**: JPEG, PNG, RAW formats (CR2, CR3, NEF, ARW, etc.), HEIC/HEIF, and videos
- **Heaps**: Temporary collections for organizing photos
- **Tags & Ratings**: Organize with tags, star ratings, and color labels
- **Dark Mode**: Photography-optimized dark interface

## Tech Stack

### Backend
- Python 3.12 with FastAPI
- SQLite with SQLAlchemy (async)
- Celery + Redis for background tasks
- pyvips for fast thumbnail generation
- ExifTool for metadata extraction

### Frontend
- React 18 with TypeScript
- Vite for fast development
- TanStack Query for data fetching
- TanStack Virtual for virtualized scrolling
- Tailwind CSS for styling
- Zustand for state management

## Quick Start

### Prerequisites
- Docker and Docker Compose

### Setup (one variable)

1. Clone the repo:
```bash
git clone <repository-url>
cd muleimage
```

2. Set **one** environment variable in `.env` — the **host** directory
   that contains your photo library. Whatever you point at will become
   your library inside Mulita.

   ```bash
   # macOS / Linux
   PHOTO_DIRS=/Users/you/Pictures

   # or any folder
   PHOTO_DIRS=/mnt/nas/photos

   # Windows (WSL)
   PHOTO_DIRS=/mnt/c/Users/you/Pictures
   ```

3. Start the stack:
```bash
docker compose up -d
```

4. Open `http://localhost:3000`. On first boot Mulita will:
   - Mount your `PHOTO_DIRS` at `/photos` inside the container
   - Auto-create a source root called **Library** pointing at `/photos`
   - Queue an initial scan, generate thumbnails, and start serving them

You don't need to touch `mulita.yml` or the API to get started.

### How "mounted folders" and "source folders" relate

There are two layers, and confusing them is the most common source of
"why doesn't this work" questions:

| Layer | Lives in | What it controls |
|---|---|---|
| **Mount** | `docker-compose.yml` (`${PHOTO_DIRS}:/photos:rw`) | What's *visible* inside the container |
| **Source root** | Database (managed by the UI) | What the scanner *walks and indexes* |

Both are required. A folder that isn't mounted is invisible to the
container regardless of what the database says, and a folder that's
mounted but not registered as a source root won't be scanned.

In practice, the default flow handles this for you: you mount one host
directory via `PHOTO_DIRS`, and the bootstrap automatically registers it
as a source root. If you want to add a *subfolder* of your library as a
separate source root (so it shows up as its own item in the sidebar),
use the **Add Source Folder** button — the dialog is a directory browser
restricted to what's mounted, so you can only add things the container
can actually see.

### Adding more libraries

Today the compose file mounts a single host directory as `/photos`.
If you want multiple libraries from different host paths, edit
`docker-compose.yml` and add additional mount lines, e.g.:

```yaml
volumes:
  - ${PHOTO_DIRS}:/photos:rw
  - /Volumes/Archive:/archive:rw   # additional library
```

Then in the UI, click **Add Source Folder**, browse to `/archive`, and
add it. (Multi-mount support via env vars is on the roadmap.)

### Read-only libraries

The default mount is `:rw` because file operations (rename, move,
empty discard pile) need to mutate the filesystem. If you want a
strict read-only library — pointing at a network share, an
authoritative archive, etc. — flip `:rw` to `:ro` in
`docker-compose.yml`. Mulita will keep working for browsing, rating,
color labels, picks, heaps, and the (soft) discard flag, but the
following will return an OS error:

- `PATCH /photos/{id}` with a new `filename` (rename)
- `POST /photos/move` (bulk move)
- `DELETE /discard/empty` (file unlinks)

**Heads up**: with `:rw`, Mulita has full write access to whatever
host directory you mount. Treat the same way you would Lightroom's
catalog folder.

## Architecture

The application consists of 5 Docker services:

- **frontend**: React SPA served by Nginx
- **backend**: FastAPI REST API
- **worker**: Celery workers for background tasks
- **redis**: Message broker for Celery
- **db**: SQLite database (file-based)

## Keyboard Shortcuts

| Key | Action |
|-----|--------|
| `←` `→` `↑` `↓` | Navigate photos |
| `Space` | Quick preview |
| `Enter` | Open loupe view |
| `P` | Pick photo |
| `X` | Reject photo |
| `1-5` | Set star rating |
| `Tab` | Toggle left sidebar |
| `I` | Toggle metadata panel |
| `G` | Grid view |
| `E` | Loupe view |
| `Delete` | Move to trash |

## Development

### Backend Development
```bash
cd backend
pip install -r requirements.txt
uvicorn app.main:app --reload
```

### Frontend Development
```bash
cd frontend
npm install
npm run dev
```

## Configuration

Source roots are managed by the UI / API (the database owns them). Edit
`mulita.yml` to configure operational settings only:

- Thumbnail sizes, quality, and format
- Scanner behaviour (watch, batch size, initial scan)
- Performance tuning (concurrency, cache TTLs, DB pool)

## Performance

- Handles 100,000+ photos efficiently
- Virtual scrolling for smooth timeline navigation
- Thumbnail generation at 10+ photos/second
- SQLite FTS5 for fast full-text search

## Future Features (Phase 2)

- AI-powered scene classification
- Face detection and clustering
- Smart albums
- Duplicate detection
- Export presets
- Multi-user support

## License

MIT