Eric Rakestraw
129cebd94d
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65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
// FILE: ./internal/normalizers/openweather/common.go
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package openweather
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import (
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"fmt"
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"strings"
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normcommon "gitea.maximumdirect.net/ejr/weatherfeeder/internal/normalizers/common"
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)
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// This file holds provider-specific helpers that are shared across multiple
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// OpenWeather normalizers (observations today; forecasts/alerts later).
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// Keeping these out of observation.go helps preserve the "one normalizer per file"
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// convention while avoiding duplication.
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// primaryCondition returns the "primary" weather condition from OpenWeather's
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// weather array. Per OpenWeather conventions, element [0] is treated as primary.
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func primaryCondition(list []owmWeather) (id int, desc string, icon string) {
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if len(list) == 0 {
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return 0, "", ""
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}
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w := list[0]
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return w.ID, strings.TrimSpace(w.Description), strings.TrimSpace(w.Icon)
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}
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// inferIsDay determines day/night using the best available upstream signals.
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//
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// Priority:
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// 1. The OpenWeather icon suffix ("d" / "n") when present.
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// 2. Sunrise/sunset bounds (unix seconds), if provided.
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// 3. Unknown (nil) when no reliable signal is present.
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func inferIsDay(icon string, dt, sunrise, sunset int64) *bool {
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// Prefer icon suffix.
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icon = strings.TrimSpace(icon)
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if icon != "" {
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last := icon[len(icon)-1]
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switch last {
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case 'd':
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v := true
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return &v
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case 'n':
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v := false
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return &v
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}
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}
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// Fall back to sunrise/sunset bounds if provided.
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if dt > 0 && sunrise > 0 && sunset > 0 {
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v := dt >= sunrise && dt < sunset
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return &v
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}
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return nil
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}
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// openWeatherStationID returns a stable station identifier for the given response.
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// Prefer the OpenWeather city ID when present; otherwise, fall back to coordinates.
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func openWeatherStationID(parsed owmResponse) string {
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if parsed.ID != 0 {
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return fmt.Sprintf("OPENWEATHER(%d)", parsed.ID)
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}
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// Fallback: synthesize from coordinates.
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return normcommon.SynthStationID("OPENWEATHER", parsed.Coord.Lat, parsed.Coord.Lon)
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}
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