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package main
import (
"encoding/xml"
"errors"
"fmt"
"net/http"
"time"
)
func toTime(s string) time.Time {
t, _ := time.Parse("2006-01-02T15:04:05", s)
return t
}
type Weather struct {
Temp Temperature `xml:"temperature"`
Symbol struct {
Number int `xml:"number,attr"`
} `xml:"symbol"`
From string `xml:"from,attr"`
URL string
Icon string
}
func (w *Weather) prepIcon(sun Sun) {
rise := toTime(sun.Rise)
set := toTime(sun.Set)
t := toTime(w.From)
night := t.Before(rise) || t.After(set)
format := "http://symbol.yr.no/grafikk/sym/b100/%02d"
switch w.Symbol.Number {
case 1, 2, 3, 5, 6, 7, 8, 20, 21:
if night {
format += "n"
} else {
format += "d"
}
}
format += ".png"
w.Icon = fmt.Sprintf(format, w.Symbol.Number)
}
type Temperature struct {
Value int `xml:"value,attr"`
Unit string `xml:"unit,attr"`
}
type Sun struct {
Rise string `xml:"rise,attr"`
Set string `xml:"set,attr"`
}
type weatherdata struct {
Sun Sun `xml:"sun"`
Forecast []*Weather `xml:"forecast>tabular>time"`
}
var place = ""
func setPlaceCmd(params []string) error {
if len(params) != 1 {
return errors.New("set-weather-place needs one parameter")
}
place = params[0]
return nil
}
func CurrentWeather() (Weather, Sun, error) {
url := "http://www.yr.no/place/" + place + "/forecast_hour_by_hour.xml"
resp, err := http.Get(url)
if err != nil {
return Weather{}, Sun{}, err
}
defer resp.Body.Close()
var wd weatherdata
dec := xml.NewDecoder(resp.Body)
if err := dec.Decode(&wd); err != nil {
return Weather{}, Sun{}, err
}
w := wd.Forecast[0]
w.URL = "http://www.yr.no/place/" + place
w.prepIcon(wd.Sun)
return *w, wd.Sun, nil
}
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