# studio einszwovier Web Application

**FastAPI-based PDF print cost calculator** with automated ink coverage analysis, Matrix integration, and multi-service hub for studio einszwovier Maker Space.

[![Docker](https://img.shields.io/badge/Docker-Ready-2496ED?logo=docker)](https://www.docker.com/)
[![FastAPI](https://img.shields.io/badge/FastAPI-0.104+-009688?logo=fastapi)](https://fastapi.tiangolo.com/)
[![Matrix](https://img.shields.io/badge/Matrix-Integrated-000000?logo=matrix)](https://matrix.org/)

---

## 🎯 Features

### Core Application

- **📄 PDF Cost Calculator**: Automated ink coverage analysis with color/B&W detection
- **🖼️ Course Management**: Dynamic course list with image gallery and modal viewer
- **📊 Cost Estimation**: Per-page breakdown with configurable rates (€/m²)
- **💬 Matrix Integration**: Automatic order submission to Matrix room

### Integrated Services

- **📚 BookStack Wiki**: Documentation and knowledge base (port 6875)
- **🤖 Ollama + Open WebUI**: Local LLM chatbot interface (port 8080)
- **📨 Matrix Synapse**: Print order collection and payment tracking (port 8008)
- **🐳 Portainer**: Container management dashboard (port 9000)
- **� JupyterHub**: Multi-user Jupyter notebook server for drone programming (port 8001)
- **🦊 Forgejo**: Self-hosted Git service for code collaboration (port 3003)
- **�🔄 Watchtower**: Automatic container updates every 24 hours

---

## 🏗️ Architecture

![Architecture Diagram](images/architecture.png)

<details>
<summary>View Mermaid source code</summary>

```mermaid
graph TB
    subgraph "studio einszwovier Web Platform"
        LP[🏠 Landing Page<br/>Port 80]
        About[ℹ️ About Page<br/>/about]
        CostCalc[💰 Cost Calculator<br/>/cost]
        
        LP --> About
        LP --> CostCalc
    end

    subgraph "Services Accessible from Landing Page"
        BookStack[� BookStack<br/>Port 6875<br/>Wissenssammlung]
        OpenWebUI[🤖 Open WebUI<br/>Port 8080<br/>LLM Chatbot]
        JupyterHub[� JupyterHub<br/>Port 8001<br/>Python Notebooks]
        Forgejo[🦊 Forgejo<br/>Port 3003<br/>Git Server]
        ElementWeb[� Element Web<br/>Port 8082<br/>Matrix Chat]
        Portainer[� Portainer<br/>Port 9000<br/>Admin Panel]
        
        LP -.->|Link| BookStack
        LP -.->|Link| OpenWebUI
        LP -.->|Link| JupyterHub
        LP -.->|Link| Forgejo
        LP -.->|Link| ElementWeb
        LP -.->|Link| Portainer
    end

    subgraph "Backend Services"
        Synapse[� Synapse<br/>Port 8008<br/>Matrix Server]
        Ollama[🔮 Ollama<br/>Port 11434<br/>LLM Engine]
        MariaDB[(� MariaDB<br/>BookStack DB)]
        
        ElementWeb --> Synapse
        OpenWebUI --> Ollama
        BookStack --> MariaDB
        CostCalc --> Synapse
    end

    subgraph "Educational Resources"
        Notebooks[📒 Drone Programming<br/>djitellopy Package]
        GitRepos[📦 Code Repositories<br/>Project Source]
        Knowledge[� Documentation<br/>Guides & Tutorials]
        
        JupyterHub --> Notebooks
        Forgejo --> GitRepos
        BookStack --> Knowledge
    end

    subgraph "Persistent Storage"
        PDFUploads[📁 PDF Files<br/>data/uploads/]
        CoursesCSV[📋 Courses CSV<br/>data/courses.csv]
        MatrixData[(🗄️ Matrix Data<br/>matrix/data/)]
        JupyterVols[(💾 Jupyter Volumes<br/>User Workspaces)]
        ForgejoData[(📚 Forgejo Data<br/>forgejo/data/)]
        
        CostCalc --> PDFUploads
        About --> CoursesCSV
        Synapse --> MatrixData
        JupyterHub --> JupyterVols
        Forgejo --> ForgejoData
    end

    subgraph "Infrastructure"
        Watchtower[🔄 Watchtower<br/>Auto-Updates<br/>Every 24h]
        Network[🌐 einszwovier_network<br/>Docker Network]
    end

    classDef webapp fill:#e3f2fd,stroke:#1976d2,stroke-width:2px
    classDef service fill:#fff3e0,stroke:#f57c00,stroke-width:2px
    classDef backend fill:#e8f5e9,stroke:#388e3c,stroke-width:2px
    classDef storage fill:#f3e5f5,stroke:#7b1fa2,stroke-width:2px
    classDef edu fill:#fce4ec,stroke:#c2185b,stroke-width:2px
    classDef infra fill:#fafafa,stroke:#616161,stroke-width:2px

    class LP,About,CostCalc webapp
    class BookStack,OpenWebUI,JupyterHub,Forgejo,ElementWeb,Portainer service
    class Synapse,Ollama,MariaDB backend
    class PDFUploads,CoursesCSV,MatrixData,JupyterVols,ForgejoData storage
    class Notebooks,GitRepos,Knowledge edu
    class Watchtower,Network infra
```

</details>

---

## 🚀 Quick Start

### Prerequisites

- **Docker** & **Docker Compose** installed
- **Poppler** (for pdf2image - included in Docker)
- **Port availability**: 80, 3003, 6875, 8001, 8008, 8080, 9000, 11434

### Installation

1. **Clone the repository:**

   ```bash
   git clone https://github.com/arontaupe/124-webapp.git
   cd 124-webapp
   ```

2. **Configure environment:**

   ```bash
   cp .env.example .env
   nano .env  # Update SERVER_HOSTNAME and passwords
   ```

3. **Start the stack:**

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

4. **Access services:**
   - Web App: <http://localhost> (or <http://your-server>)
   - BookStack: <http://localhost:6875>
   - Open WebUI: <http://localhost:8080>
   - Portainer: <http://localhost:9000>
   - Matrix: <http://localhost:8008>
   - JupyterHub: <http://localhost:8001>
   - Forgejo: <http://localhost:3003>

### First-Time Setup

1. **Get Matrix Room ID:**

   ```bash
   python get_room_id.py
   ```

2. **Update .env with room ID:**

   ```bash
   MATRIX_ROOM="!YourRoomID:${SERVER_HOSTNAME}"
   ```

3. **Restart web container:**

   ```bash
   docker compose restart web
   ```

---

## 📚 Course Management

Courses are managed via CSV file with optional images:

### Add a Course

1. **Edit `data/courses.csv`:**

   ```csv
   title,description,dates,offen_fuer,image
   My Course,Learn cool stuff,"Oct '25",Grade 10,/static/images/courses/my-course.jpg
   ```

2. **Add course image (optional):**

   ```bash
   cp my-image.jpg static/images/courses/my-course.jpg
   ```

3. **Changes apply immediately** (no restart needed)

### Course Image Features

- **Thumbnail view**: 80x80px next to course info
- **Hover zoom**: Expands to 200x200px on hover
- **Click to enlarge**: Opens full-size modal viewer
- **Auto-cropping**: `object-fit: cover` ensures uniform display

See [data/KURSE_README.md](data/KURSE_README.md) for detailed documentation.

---

## 🔧 Configuration

### Environment Variables

Key variables in `.env`:

```bash
# Server Configuration
SERVER_HOSTNAME=your-server.com

# Print Rates (€/m²)
RATE_PER_M2_BLACK=4.0
RATE_PER_M2_COLOR=5.0

# Matrix Integration
MATRIX_USER="@einszwovier:${SERVER_HOSTNAME}"
MATRIX_PASS="your_password"
MATRIX_HOMESERVER="http://${SERVER_HOSTNAME}:8008"
MATRIX_ROOM="!RoomID:${SERVER_HOSTNAME}"

# Service Ports
SYNAPSE_PORT=8008
OLLAMA_PORT=11434
OPENWEBUI_PORT=8080
BOOKSTACK_PORT=6875
PORTAINER_PORT=9000
JUPYTER_PORT=8001
FORGEJO_PORT=3003

# JupyterHub Authentication
JUPYTER_PASSWORD=einszwo4
```

See [.env.example](.env.example) for full configuration.

---

## 🐳 Docker Services

| Service | Image | Port | Purpose | Resources |
|---------|-------|------|---------|-----------|
| **web** | Custom (FastAPI) | 80 | Main application | 1 CPU, 1GB RAM |
| **synapse** | matrixdotorg/synapse | 8008 | Matrix homeserver | 2 CPU, 2GB RAM |
| **ollama** | ollama/ollama | 11434 | LLM inference | 6 CPU, 16GB RAM |
| **open-webui** | ghcr.io/open-webui/open-webui | 8080 | LLM chat UI | 2 CPU, 2GB RAM |
| **bookstack** | lscr.io/linuxserver/bookstack | 6875 | Documentation wiki | Default |
| **bookstack-mariadb** | lscr.io/linuxserver/mariadb | 3306 | Database for BookStack | Default |
| **jupyterhub** | Custom (Python 3.13) | 8001 | Multi-user Jupyter notebooks | 2 CPU, 2GB RAM |
| **forgejo** | codeberg.org/forgejo/forgejo:11 | 3003, 222 | Git service (web, SSH) | Default |
| **portainer** | portainer/portainer-ce | 9000, 9443 | Container management | Default |
| **watchtower** | containrrr/watchtower | - | Auto-updates (24h) | Default |

### Health Checks

All services have health checks configured:

- **web**: `curl http://localhost:8000/`
- **synapse**: `curl http://localhost:8008/_matrix/static/`
- **ollama**: `curl http://localhost:11434/`
- **open-webui**: `curl http://localhost:8080/`
- **bookstack**: `curl http://localhost/`
- **mariadb**: MariaDB query test
- **portainer**: API status check
- **watchtower**: Process check

---

## 📖 Documentation

- **[SECURITY.md](SECURITY.md)** - Security best practices and secrets management
- **[PORTABILITY.md](PORTABILITY.md)** - Server migration guide
- **[PRE_RELEASE_CHECKLIST.md](PRE_RELEASE_CHECKLIST.md)** - Pre-publication verification
- **[data/KURSE_README.md](data/KURSE_README.md)** - Course management guide

---

## 🔐 Security

**Before deploying to production:**

1. ✅ Change all passwords in `.env`
2. ✅ Generate new `BOOKSTACK_APP_KEY`
3. ✅ Update Matrix credentials
4. ✅ Configure firewall (restrict Portainer access)
5. ✅ Set up HTTPS/SSL
6. ✅ Enable automated backups

See [SECURITY.md](SECURITY.md) for comprehensive security guidelines.

**Security Disclosure:** If you discover a vulnerability, email `einszwovier@gvb-gymnasium.de` instead of opening a public issue.

---

## 🔄 Backup & Restore

### Backup All Data

```bash
./backup.sh
```

Creates timestamped backups of:

- BookStack database & files
- Matrix homeserver data
- PDF uploads
- Course data & images
- Environment configuration

### Restore from Backup

```bash
./restore.sh YYYYMMDD_HHMMSS
```

---

## 🚢 Deployment & Portability

This application is designed to be **fully portable**. To move to a new server:

1. **On old server:**

   ```bash
   ./backup.sh
   ```

2. **On new server:**

   ```bash
   git clone <repo-url>
   cd 124-webapp
   cp .env.example .env
   # Update SERVER_HOSTNAME in .env
   ./restore.sh YYYYMMDD_HHMMSS
   docker compose up -d
   ```

See [PORTABILITY.md](PORTABILITY.md) for detailed migration guide.

---

## 🛠️ Development

### Local Development

```bash
# Option 1: Direct Python (with auto-reload)
python run_app.py

# Option 2: Docker Compose
docker compose up --build
```

### Project Structure

```zsh
.
├── main.py                 # FastAPI application
├── cost_calculator.py      # PDF analysis logic
├── mailer.py              # Matrix integration
├── templates/             # Jinja2 templates
│   ├── base.html
│   ├── landing.html
│   ├── about.html
│   ├── cost-calculator.html
│   └── result.html
├── static/               # CSS, images, fonts
│   ├── css/style.css
│   ├── images/
│   └── fonts/
├── data/
│   ├── courses.csv       # Course database
│   └── uploads/          # PDF uploads
├── docker-compose.yml    # Service orchestration
├── Dockerfile           # Web app container
└── requirements.txt     # Python dependencies
```

### Key Technologies

- **FastAPI** - Modern Python web framework
- **PyPDF2** - PDF metadata extraction
- **pdf2image** - PDF to image conversion
- **Pillow + NumPy** - Image processing & ink analysis
- **matrix-nio** - Matrix protocol client
- **Jinja2** - Template engine
- **Gunicorn + Uvicorn** - Production WSGI/ASGI servers

---

## 🤝 Contributing

Contributions are welcome! This is part of **studio einszwovier**, a collaborative Maker Space.

1. Fork the repository
2. Create a feature branch (`git checkout -b feature/amazing-feature`)
3. Commit your changes (`git commit -m 'Add amazing feature'`)
4. Push to the branch (`git push origin feature/amazing-feature`)
5. Open a Pull Request

---

## 📄 License

This project is part of studio einszwovier educational initiative.

---

## 📞 Contact

**studio einszwovier**
Gabriele-von-Bülow-Gymnasium
Tile-Brügge-Weg 63, 13509 Berlin (Tegel)

- **Email**: <einszwovier@gvb-gymnasium.de>
- **Team**: Aron Petau & Friedrich Weber
- **Hours**: Tuesday - Thursday, 11:00 - 16:00
- **Location**: Room 124

---

## 🙏 Acknowledgments

- Matrix.org for the communication protocol
- Ollama team for local LLM support
- BookStack for the documentation platform
- FastAPI community
- All contributors and students of studio einszwovier

---

Made with ❤️ at studio einszwovier Maker Space