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weather.go
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weather.go
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package main
import (
"fmt"
"io"
"net/http"
"github.com/mitchellh/mapstructure"
geojson "github.com/paulmach/go.geojson"
"go.uber.org/zap"
"nw.codes/godapnet"
)
func getWeatherData(logger *zap.Logger, url string) []byte {
resp, err := http.Get(url)
if err != nil {
logger.Fatal("Could not get weather data from URL", zap.String("url", url), zap.Error(err))
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
logger.Fatal("Could not parse response body", zap.Error(err))
}
return body
}
func parseWeatherData(logger *zap.Logger, data []byte) (*Properties, error) {
feature, err := geojson.UnmarshalFeature(data)
if err != nil {
return nil, fmt.Errorf("could not unmarshal feature: %w", err)
}
var properties *Properties
err = mapstructure.Decode(feature.Properties, &properties)
if err != nil {
return nil, fmt.Errorf("could not decode properties: %w", err)
}
return properties, err
}
func sendCurrentForecast(logger *zap.Logger, f Forecast, sender *godapnet.Sender, settings DapnetSettings) error {
msg := fmt.Sprintf("%s - %v%s - %s - Wind: %s %s", f.Name, f.Temperature, f.TemperatureUnit, f.ShortForecast, f.WindSpeed, f.WindDirection)
callsigns := settings.CallsignNames
txGps := settings.TransmitterGroupNames
emerg := false
// set configuration for message
mc := godapnet.NewMessageConfig(sender.Callsign, godapnet.Alphapoc602RMaxMessageLength, callsigns, txGps, emerg)
// send message
err := sender.Send(msg, mc)
if err != nil {
return fmt.Errorf("could not send message: %w", err)
}
return nil
}