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Implement offline harmonic tide prediction as specified in COMPONENT_DESIGN.md:
- TideConstituent: name, speedDegPerHour, amplitudeMeters, phaseDeg
- TidePrediction: timestampMs, heightMeters
- TideStation: id, name, lat, lon, datumOffsetMeters, constituents
- HarmonicTideCalculator: predictHeight(), predictRange(), findHighLow()
Formula: h(t) = Z0 + Σ [ Hi × cos( ωi × (t − t0) − φi ) ]
- 15 unit tests covering all calculation paths
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- GpsPosition: latitude, longitude, sog (knots), cog (degrees true), timestampMs
- NmeaParser.parseRmc: handles GP/GN talker IDs, void status, malformed input
- SOG/COG default to 0.0 when fields absent; S/W coords are negative
- 13 unit tests: GpsPositionTest (2), NmeaParserTest (11) — all GREEN
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Package declarations were already org.terst.nav.* but files lived under
com/example/androidapp/. Kotlin 2.0 (K2) compiler on CI fails when
package declarations don't match directory structure during kapt stub
generation. Moved all 20 files to their correct locations and renamed
MainActivity (weather) -> WeatherActivity to avoid confusion with the
nav app's MainActivity.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Extract location permission decision logic from MainActivity into a
testable LocationPermissionHandler class. Covers: permission already
granted, needs request, fine-only granted, coarse-only granted, both
granted, both denied, and never-ask-again (empty grants) scenarios.
All permissions (INTERNET, ACCESS_FINE_LOCATION, ACCESS_COARSE_LOCATION)
were already declared in AndroidManifest.xml; no manifest changes needed.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Implements the wind/current map overlay and 7-day weather forecast
display that loads on application launch:
Data layer:
- Open-Meteo API (free, no key): WeatherApiService + MarineApiService
- Moshi-annotated response models (WeatherResponse, MarineResponse)
- WeatherRepository: parallel async fetch, Result<T> error propagation
- Domain models: WindArrow (with beaufortScale/isCalm) + ForecastItem
(with weatherDescription/isRainy via WMO weather codes)
Presentation layer:
- MainViewModel: StateFlow<UiState> (Loading/Success/Error),
windArrow and forecast streams
- MainActivity: runtime location permission, FusedLocationProvider
GPS fetch on startup, falls back to SF Bay default
- MapFragment: MapLibre GL map with wind-arrow SymbolLayer;
icon rotated by wind direction, size scaled by speed in knots
- ForecastFragment + ForecastAdapter: RecyclerView ListAdapter
showing 7-day hourly forecast (time, description, wind, temp, precip)
Resources:
- ic_wind_arrow.xml vector drawable (north-pointing, rotated by MapLibre)
- BottomNavigationView: Map / Forecast tabs
- ViewBinding enabled throughout
Tests (TDD — written before implementation):
- WindArrowTest: calm detection, direction normalisation, Beaufort scale
- ForecastItemTest: weatherDescription, isRainy for WMO codes
- WeatherApiServiceTest: MockWebServer request params + response parsing
- WeatherRepositoryTest: MockK service mocks, data mapping, error paths
- MainViewModelTest: Turbine StateFlow assertions for all state transitions
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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