move "weather" stuff to its own package

1 files changed, 106 insertions, 0 deletions

diff --git a/weather/weather.go b/weather/weather.go
new file mode 100644
index 0000000..17e8884
--- /dev/null
+++ b/weather/weather.go
@@ -0,0 +1,106 @@
+// Copyright © 2022 siddharth ravikumar <s@ricketyspace.net>
+// SPDX-License-Identifier: ISC
+
+package weather
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"ricketyspace.net/peach/nws"
+	"ricketyspace.net/peach/version"
+)
+
+type Weather struct {
+	Title           string
+	Version         string
+	Location        string
+	Now             WeatherNow
+	Q2HTimeline     WeatherTimeline // Q2H forecast of the next 12 hours.
+	BiDailyTimeline WeatherTimeline // BiDaily forecast for the next 3 days.
+}
+
+type WeatherNow struct {
+	Temperature     int
+	TemperatureUnit string
+	Forecast        string
+	WindSpeed       string
+	WindDirection   string
+}
+
+type WeatherPeriod struct {
+	Name            string
+	Forecast        string
+	Hour            int
+	Temperature     int
+	TemperatureUnit string
+}
+
+type WeatherTimeline struct {
+	Periods []WeatherPeriod
+}
+
+func NewWeather(point *nws.Point, f, fh *nws.Forecast) (*Weather, error) {
+	w := new(Weather)
+	w.Location = fmt.Sprintf("%s, %s",
+		strings.ToLower(point.Properties.RelativeLocation.Properties.City),
+		strings.ToLower(point.Properties.RelativeLocation.Properties.State),
+	)
+	w.Title = w.Location
+	w.Version = version.Version
+	w.Now = WeatherNow{
+		Temperature:     fh.Properties.Periods[0].Temperature,
+		TemperatureUnit: fh.Properties.Periods[0].TemperatureUnit,
+		Forecast:        fh.Properties.Periods[0].ShortForecast,
+		WindSpeed:       fh.Properties.Periods[0].WindSpeed,
+		WindDirection:   fh.Properties.Periods[0].WindDirection,
+	}
+
+	// Build Q2H timeline for the 12 hours.
+	q2hPeriods := []WeatherPeriod{}
+	max := 6
+	for i, period := range fh.Properties.Periods {
+		if i%2 != 0 {
+			continue // Take every other period
+		}
+		t, err := time.Parse(time.RFC3339, period.StartTime)
+		if err != nil {
+			return nil, err
+		}
+		p := WeatherPeriod{
+			Forecast:        period.DetailedForecast,
+			Hour:            t.Hour(),
+			Temperature:     period.Temperature,
+			TemperatureUnit: period.TemperatureUnit,
+		}
+		q2hPeriods = append(q2hPeriods, p)
+		if len(q2hPeriods) == max {
+			break
+		}
+	}
+	w.Q2HTimeline = WeatherTimeline{
+		Periods: q2hPeriods,
+	}
+
+	// Build BiDaily  timeline for the next 3 days.
+	bdPeriods := []WeatherPeriod{}
+	max = 8
+	for _, period := range f.Properties.Periods {
+		p := WeatherPeriod{
+			Name:            period.Name,
+			Forecast:        period.DetailedForecast,
+			Temperature:     period.Temperature,
+			TemperatureUnit: period.TemperatureUnit,
+		}
+		bdPeriods = append(bdPeriods, p)
+		if len(bdPeriods) == max {
+			break
+		}
+	}
+	w.BiDailyTimeline = WeatherTimeline{
+		Periods: bdPeriods,
+	}
+
+	return w, nil
+}