# DRK Blutspende – Arbeitsorte: Dokumentation

Developer/maintainer documentation for the **Arbeitsorte-Logger**, a small
desktop app that records blood-drive work assignments (date + city + postal
code) and plots them on an interactive map.

> Context: built as a personal tool for a single user, running locally on a
> **Linux Mint laptop**. Ease of use for a non-technical user is the primary
> design constraint. There is no server, no multi-user story, and no network
> dependency beyond geocoding and the map tiles.

## Documents

| File | Contents |
|------|----------|
| [overview.md](overview.md) | What the app does, feature by feature |
| [architecture.md](architecture.md) | Code structure, threading model, data flow |
| [data-model.md](data-model.md) | The `orte.csv` schema and how it is read/written |
| [setup.md](setup.md) | Install & run on a fresh Linux Mint machine, plus a desktop launcher |
| [improvements.md](improvements.md) | Prioritized review findings and suggested changes |
| [changelog.md](changelog.md) | What has changed, newest first |
| [dev-notes.md](dev-notes.md) | Assumptions that turned out wrong — read before editing |

## At a glance

- **Language / stack:** Python 3, Tkinter via [`ttkbootstrap`](https://ttkbootstrap.readthedocs.io/)
- **Single file:** [`app.py`](../app.py) (~760 lines)
- **Storage:** one CSV file, `data/orte.csv`
- **Map:** generated on demand as `data/karte.html` with [Folium](https://python-visualization.github.io/folium/) (Leaflet), opened in the default browser
- **Geocoding:** OpenStreetMap Nominatim via [`geopy`](https://geopy.readthedocs.io/), rate-limited to 1 request/second on a background thread
- **UI language:** German
- **Persistence:** atomic CSV writes + rotating backups in `data/backups/`; log at `data/app.log`
- **Tests:** non-GUI smoke checks only (not yet a committed `tests/` suite)
- **Version control:** git initialized 2026-09-07