77 lines
2 KiB
Go
77 lines
2 KiB
Go
package weather
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import (
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"encoding/json"
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"fmt"
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"io"
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"log/slog"
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"math"
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"net/http"
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"time"
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"github.com/caarlos0/env/v8"
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"github.com/r3labs/sse/v2"
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)
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func NewWeatherService(sse *sse.Server) *Weather {
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var w = Weather{sse: sse}
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if err := env.Parse(&w.config); err != nil {
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panic(err)
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}
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if w.config.Key != "" {
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w.setWeatherUnits()
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go w.updateWeather(time.Second * 90)
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}
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return &w
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}
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func (w *Weather) setWeatherUnits() {
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if w.config.Units == "imperial" {
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w.CurrentWeather.Units = "°F"
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} else {
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w.CurrentWeather.Units = "°C"
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}
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}
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func (w *Weather) copyWeatherValues(weatherResp *OpenWeatherApiResponse) {
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myTime := time.Unix(weatherResp.Sys.Sunrise, 0)
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w.CurrentWeather.Sunrise = myTime.Format("15:04")
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myTime = time.Unix(weatherResp.Sys.Sunset, 0)
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w.CurrentWeather.Sunset = myTime.Format("15:04")
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w.CurrentWeather.Icon = weatherResp.Weather[0].Icon
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if w.config.Digits {
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w.CurrentWeather.Temp = weatherResp.Main.Temp
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} else {
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w.CurrentWeather.Temp = math.Round(weatherResp.Main.Temp)
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}
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w.CurrentWeather.Description = weatherResp.Weather[0].Description
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w.CurrentWeather.Humidity = weatherResp.Main.Humidity
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}
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func (w *Weather) updateWeather(interval time.Duration) {
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var weatherResponse OpenWeatherApiResponse
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for {
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resp, err := http.Get(fmt.Sprintf("https://api.openweathermap.org/data/2.5/weather?lat=%f&lon=%f&appid=%s&units=%s&lang=%s",
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w.config.Latitude,
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w.config.Longitude,
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w.config.Key,
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w.config.Units,
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w.config.Lang))
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if err != nil || resp.StatusCode != 200 {
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slog.Error("weather cannot be updated, please check WEATHER_KEY")
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} else {
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body, _ := io.ReadAll(resp.Body)
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err = json.Unmarshal(body, &weatherResponse)
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if err != nil {
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slog.Error("weather cannot be processed")
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} else {
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w.copyWeatherValues(&weatherResponse)
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slog.Debug("weather updated", "temp", w.CurrentWeather.Temp)
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}
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resp.Body.Close()
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json, _ := json.Marshal(w.CurrentWeather)
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w.sse.Publish("weather", &sse.Event{Data: json})
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}
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time.Sleep(interval)
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}
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}
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