Moved the weatherfeeder model out of internal/ so that downstream consumers can import it directly.

model/forecast.go

@@ -0,0 +1,118 @@
+// FILE: internal/model/forecast.go
+package model
+
+import "time"
+
+// ForecastProduct distinguishes *what kind* of forecast a provider is offering.
+// This is intentionally canonical and not provider-nomenclature.
+type ForecastProduct string
+
+const (
+	// ForecastProductHourly is a sub-daily forecast where each period is typically ~1 hour.
+	ForecastProductHourly ForecastProduct = "hourly"
+
+	// ForecastProductNarrative is a human-oriented sequence of periods like
+	// "Tonight", "Friday", "Friday Night" with variable duration.
+	//
+	// (NWS "/forecast" looks like this; it is not strictly “daily”.)
+	ForecastProductNarrative ForecastProduct = "narrative"
+
+	// ForecastProductDaily is a calendar-day (or day-bucketed) forecast where a period
+	// commonly carries min/max values (Open-Meteo daily, many others).
+	ForecastProductDaily ForecastProduct = "daily"
+)
+
+// WeatherForecastRun is a single issued forecast snapshot for a location and product.
+//
+// Design goals:
+//   - Immutable snapshot semantics: “provider asserted X at IssuedAt”.
+//   - Provider-independent schema: normalize many upstreams into one shape.
+//   - Retrieval-friendly: periods are inside the run, but can be stored/indexed separately.
+type WeatherForecastRun struct {
+	// Identity / metadata (aligned with WeatherObservation’s StationID/StationName/Timestamp).
+	LocationID   string    `json:"locationId,omitempty"`
+	LocationName string    `json:"locationName,omitempty"`
+	IssuedAt     time.Time `json:"issuedAt"` // required: when this run was generated/issued
+
+	// Some providers include both a generated time and a later update time.
+	// Keep UpdatedAt optional; many providers won’t supply it.
+	UpdatedAt *time.Time `json:"updatedAt,omitempty"`
+
+	// What sort of forecast this run represents (hourly vs narrative vs daily).
+	Product ForecastProduct `json:"product"`
+
+	// Optional spatial context. Many providers are fundamentally lat/lon-based.
+	Latitude  *float64 `json:"latitude,omitempty"`
+	Longitude *float64 `json:"longitude,omitempty"`
+
+	// Kept to align with WeatherObservation and because elevation is sometimes important
+	// for interpreting temps/precip, even if not always supplied by the provider.
+	ElevationMeters *float64 `json:"elevationMeters,omitempty"`
+
+	// The forecast periods contained in this issued run. Order should be chronological.
+	Periods []WeatherForecastPeriod `json:"periods"`
+}
+
+// WeatherForecastPeriod is a forecast for a specific valid interval [StartTime, EndTime).
+//
+// Conceptually, it mirrors WeatherObservation (condition + measurements), but:
+// /  - It has a time *range* (start/end) instead of a single timestamp.
+// /  - It adds forecast-specific fields like probability/amount of precip.
+// /  - It supports min/max for “daily” products (and other aggregated periods).
+type WeatherForecastPeriod struct {
+	// Identity / validity window (required)
+	StartTime time.Time `json:"startTime"`
+	EndTime   time.Time `json:"endTime"`
+
+	// Human-facing period label (e.g., "Tonight", "Friday"). Often empty for hourly.
+	Name string `json:"name,omitempty"`
+
+	// Canonical day/night hint (aligned with WeatherObservation.IsDay).
+	// Providers vary in whether they explicitly include this.
+	IsDay *bool `json:"isDay,omitempty"`
+
+	// Canonical internal representation (provider-independent).
+	// Like WeatherObservation, this is required; use an “unknown” WMOCode if unmappable.
+	ConditionCode WMOCode `json:"conditionCode"`
+
+	// Provider-independent short text describing the conditions (normalized, if possible).
+	ConditionText string `json:"conditionText,omitempty"`
+
+	// Provider-specific “evidence” for troubleshooting mapping and drift.
+	ProviderRawDescription string `json:"providerRawDescription,omitempty"`
+
+	// Human-facing narrative. Not all providers supply rich text (Open-Meteo often won’t).
+	TextDescription string `json:"textDescription,omitempty"` // short phrase / summary
+	DetailedText    string `json:"detailedText,omitempty"`    // longer narrative, if available
+
+	// Provider-specific (legacy / transitional)
+	IconURL string `json:"iconUrl,omitempty"`
+
+	// Core predicted measurements (nullable; units align with WeatherObservation)
+	TemperatureC *float64 `json:"temperatureC,omitempty"`
+
+	// For aggregated products (notably “daily”), providers may supply min/max.
+	TemperatureCMin *float64 `json:"temperatureCMin,omitempty"`
+	TemperatureCMax *float64 `json:"temperatureCMax,omitempty"`
+
+	DewpointC               *float64 `json:"dewpointC,omitempty"`
+	RelativeHumidityPercent *float64 `json:"relativeHumidityPercent,omitempty"`
+	WindDirectionDegrees    *float64 `json:"windDirectionDegrees,omitempty"`
+	WindSpeedKmh            *float64 `json:"windSpeedKmh,omitempty"`
+	WindGustKmh             *float64 `json:"windGustKmh,omitempty"`
+	BarometricPressurePa    *float64 `json:"barometricPressurePa,omitempty"`
+	VisibilityMeters        *float64 `json:"visibilityMeters,omitempty"`
+	ApparentTemperatureC    *float64 `json:"apparentTemperatureC,omitempty"`
+	CloudCoverPercent       *float64 `json:"cloudCoverPercent,omitempty"`
+
+	// Precipitation (forecast-specific). Keep these generic and provider-independent.
+	ProbabilityOfPrecipitationPercent *float64 `json:"probabilityOfPrecipitationPercent,omitempty"`
+
+	// Quantitative precip is not universally available, but OpenWeather/Open-Meteo often supply it.
+	// Use liquid-equivalent mm for interoperability.
+	PrecipitationAmountMm *float64 `json:"precipitationAmountMm,omitempty"`
+	SnowfallDepthMM       *float64 `json:"snowfallDepthMm,omitempty"`
+
+	// Optional extras that some providers supply and downstream might care about.
+	UVIndex *float64 `json:"uvIndex,omitempty"`
+}