statusscreen/src/weather/weather.go

package weather

import (
	"../config"
	"io/ioutil"
	"net/http"
	"strings"
	"time"
)

// Weather is my Weather struct
type Weather struct {
	Config       *config.Config
	lastResponse string
	nextRefresh  int64
}

// GetOutput returns a rendered result of this module
func (weather *Weather) GetOutput() []string {
	if weather.nextRefresh <= time.Now().Unix() {
		weather.nextRefresh += 10
		go weather.getData()
	}

	parts := strings.Split(weather.lastResponse, "\n")

	if len(parts) >= 37 {
		return parts[:37]
	}

	return []string{}
}

func (weather *Weather) getData() {
	myWeather, err := weather.getWeather()

	if err == nil {
		weather.lastResponse = myWeather
		weather.nextRefresh = time.Now().Unix() + weather.Config.Weather.RefreshDelay
	} else {
		// log.Fatal(err)
	}
}

func (weather *Weather) getWeather() (string, error) {
	// Set up http client to fetch weather
	client := &http.Client{
		Timeout: time.Second * 5,
	}

	// Set up request
	req, err := http.NewRequest("GET", weather.Config.Weather.URL, nil)
	if err != nil {
		return "", err
	}

	// Set curl user agent
	req.Header.Set("User-Agent", "curl/7.52.1")

	// Do request
	resp, err := client.Do(req)
	if err != nil {
		return "", err
	}

	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return "", err
	}

	return string(body), nil
}