Alby96/Europa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
main
Europa/Nuvolari/CLAUDE.md
T
Alby96andClaude Opus 5 f434a68155 Replace the default Flutter icon with a stylised cloud 
The app shipped the Flutter template's blue F, which said nothing about what it
does and did not match the interface. The launcher icon is now a white cloud on
the same seed blue the app themes itself with, so the two read as one product.

The icon is drawn rather than hand-edited: tool/generate_icon.py renders it from
signed distance fields — a union of three circles and a rounded box — using only
the standard library, so regenerating it needs no image toolchain. The shape's
framing is derived from its own bounding box, which is what keeps it centred;
maintaining the bounds separately from the shape had it drifting off-centre.

Adds the adaptive icon and the Android 13 monochrome layer, which were missing
entirely. The generator frames the cloud against the 72dp the launcher mask
always keeps and adaptive_icon_foreground_inset is 0, so the layer is not shrunk
twice and the icon reads at the same size as its neighbours on a home screen.

Verified on the emulator: the cloud appears in the app drawer and holds its shape
down to 48px. docs/architecture.md records how to regenerate it, including the
flutter_launcher_icons 0.14.4 bug that writes a string into a boolean Xcode
setting and needs reverting by hand afterwards.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-10 22:44:33 +02:00

5.9 KiB
Raw Permalink Blame History

CLAUDE.md — Nuvolari

Project

Cross-platform precipitation-radar app for the Piedmont region (Italy). Android first, iOS later, single Flutter codebase. Region-scoped now (Piemonte) but extensible to other regions via configuration.

Scope

Radar on a map, plus official alerts and rain notifications. Nothing else.

In scope:

  • Animated precipitation radar over an OpenStreetMap base map
  • Saved places, municipality and coordinate search, and optional device location with a live position marker; used to frame the map and later to anchor notifications
  • Ground-station rain accumulations and 72-hour temperature from the ARPA realtime API, published through the worker
  • ARPA Piemonte official alert bulletin (XML-CAP), republished verbatim
  • "Rain incoming" notifications by geographic cell

Explicitly out of scope — do not add these back without being asked:

  • Weather forecasts of any kind
  • Lightning
  • Home-screen widget
  • Advertising and consent flows

The app is currently free with no advertising. Ads may return later, so prefer data sources that permit commercial use; do not adopt a non-commercial-only source on the grounds that there are no ads today.

Golden rules

  • Code, identifiers and commit messages in English. UI text in Italian via ARB localization.
  • Never commit secrets. Use .env + --dart-define; keep .gitignore updated.
  • Never poll ARPA/DPC servers directly from the app: always go through our backend/CDN.
  • Never store precise user locations server-side: rain notifications use geographic CELLS.
  • Location is COARSE only. geolocator injects ACCESS_FINE_LOCATION; the app manifest removes it with tools:node="remove". Do not add it back without a feature that needs it and a matching Data safety update. Saved places live in SharedPreferences on the device and never leave it.
  • Do not use ARPA/DPC name, logo or the word "ufficiale" in a way implying an official app.

Architecture

  • Monorepo: /app (Flutter), /backend (Python worker), /docs (detailed docs), /tool (scripts).
  • Radar data via RadarSource interface with adapters: DpcRadarSource (live, reads our CDN), ArpaRadarSource (stub, awaits access), MockRadarSource (offline/demo). Active source chosen by region config + runtime flag.
  • App reads PNG frames + manifest.json from CDN produced by the backend worker (crop to Piemonte bbox, reproject to EPSG:3857).

Data sources & licenses (attribution is mandatory on the Sources screen)

  • Radar (active): Radar-DPC — base https://radar-api.protezionecivile.it/ , GET /findLastProductByType?type=VMI , POST /downloadProduct (GeoTIFF via presigned S3). REQUIRE header origin: https://radar.protezionecivile.it. License CC BY-SA — credit "Radar-DPC"; derivative data products must stay CC BY-SA. Docs: dpc-radar.readthedocs.io. The rasters are on a custom projection centred on Italy, not EPSG:4326 or 3857, and their GeoKeys are internally inconsistent — read the CRS from each file, never hardcode it.
  • Radar (future): ARPA Piemonte (HDF5 ODIM, 5-minute volumes). The real-time access link must be requested by email at info.meteo@arpa.piemonte.it — that request is the project owner's to make. Adapter stays a disabled stub until it exists.
  • Ground stations: ARPA realtime API, https://utility.arpa.piemonte.it/api_realtime — no key, no registration. /pie_anag gives 374 stations with coordinates (286 with a rain gauge); /data_pie gives hourly cum_rain_1h/3h/6h/12h/24h, temperature, wind, snow and hydrometric level for the last 3 days. It lags ~4.5 hours — an observation archive, not a live feed, and it must never be shown as current next to 5-minute radar. Fetched by the worker, never by the app.
  • ARPA licence: CC BY 4.0 per https://www.arpa.piemonte.it/note-legali, commercial use permitted, credit "Fonte: Arpa Piemonte - www.arpa.piemonte.it". Both REST APIs link that notice from their OpenAPI description. The radar page does not repeat it, so ask ARPA to confirm it covers the radar volumes in the same email.
  • Alerts: ARPA Piemonte XML-CAP bulletin at https://www.arpa.piemonte.it/export/xmlcap/allerta.xml — reproduce alert levels WITHOUT reinterpreting; link the official channel. Six level values, not four: VERDE, GIALLO, ARANCIONE, ROSSO, plus BIANCO (avalanche scale out of season) and "-" (no data).
  • Base map: OpenFreeMap (https://openfreemap.org), free OSM vector tiles with no API key and no request limits. Mandatory credits: "© OpenMapTiles" and "© OpenStreetMap contributors" (ODbL). OpenFreeMap's own credit is optional.
  • Municipalities: 1180 Piedmont comuni bundled from Istat boundary shapefiles (CC BY 4.0), generated by tool/generate_places.py. Offline search, no geocoding service. The source DBF is UTF-8 despite appearances and the geometry is UTM 32N — see docs/data-sources.md before regenerating.
  • Launcher icon: a white cloud on the seed blue #1F6FB2, drawn by tool/generate_icon.py and expanded by flutter_launcher_icons. Read the "Launcher icon" section of docs/architecture.md before regenerating: the tool corrupts an Xcode build setting.

Verification loop (run after each milestone)

  • dart format . ; flutter analyze ; flutter test ; flutter build appbundle
  • Backend: python -m pytest ; lint. Commit frequently with clear messages.
  • tool/verify.ps1 runs all of the above and skips stages that do not exist yet.
  • Verify visually on the nuvolari AVD before calling a milestone done. Twice now, running the app has caught defects that passing tests did not.

Store / compliance targets

  • Google Play: target API 36 (Android 16); closed testing 12 testers / 14 days; Data safety section; prominent disclosure for location; signed AAB.
  • No advertising, so no CMP and no IAB TCF obligations while that holds.
  • iOS later: keep platform abstractions clean (privacy nutrition label to add).

Docs to maintain in /docs

architecture.md, data-sources.md, licenses.md, stack-decisions.md, roadmap.md, privacy.md

Reference in New Issue View Git Blame Copy Permalink