Move OpenWeatherMap code to a separate struct

lib/weather/structs.go

@@ -0,0 +1,42 @@
+package weather
+
+type (
+	Temperature float32
+
+	Weather struct {
+		Main struct {
+			Temp      Temperature `json:"temp"`
+			FeelsLike Temperature `json:"feels_like"`
+			TempMin   Temperature `json:"temp_min"`
+			TempMax   Temperature `json:"temp_max"`
+			Pressure  float32     `json:"pressure"`
+			Humidity  float32     `json:"humidity"`
+		} `json:"main"`
+
+		Coord struct {
+			Lon float32 `json:"lon"`
+			Lat float32 `json:"lat"`
+		} `json:"coord"`
+
+		Rain struct {
+			H1 float32 `json:"1h"`
+			H3 float32 `json:"3h"`
+		} `json:"rain"`
+	}
+
+	WeatherError struct {
+		Message string `json:"message"`
+	}
+)
+
+func (t *Temperature) Kelvin() float32 {
+	return float32(*t)
+}
+
+func (t *Temperature) Fahrenheit() float32 {
+	return ((float32(*t) - 273.15) * (9.0 / 5)) + 32
+}
+
+func (t *Temperature) Celcius() float32 {
+	return float32(*t) - 273.15
+}

lib/weather/weather.go

@@ -0,0 +1,81 @@
+package weather
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	"git.kill0.net/chill9/beepboop/lib"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type (
+	WeatherClient struct {
+		token string
+	}
+)
+
+const (
+	OpenWeatherMapURI = "https://api.openweathermap.org"
+)
+
+var (
+	EndpointWeather = lib.BuildURI(OpenWeatherMapURI, "/data/2.5/weather")
+)
+
+func NewClient(token string) *WeatherClient {
+	return &WeatherClient{token}
+}
+
+func (c *WeatherClient) Get(loc string) (w Weather, err error) {
+	var (
+		werr WeatherError
+	)
+
+	req, err := http.NewRequest("GET", EndpointWeather, nil)
+	if err != nil {
+		err = fmt.Errorf("failed to create new request: %s", err)
+		return
+	}
+
+	q := req.URL.Query()
+	q.Add("q", loc)
+	q.Add("appid", c.token)
+	req.URL.RawQuery = q.Encode()
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		err = fmt.Errorf("HTTP request failed: %s", err)
+		return
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		err = fmt.Errorf("reading HTTP response failed: %s", err)
+		return
+	}
+
+	if resp.StatusCode != 200 {
+		err = json.Unmarshal(body, &werr)
+		if err != nil {
+			log.Debugf("%s", body)
+			err = fmt.Errorf("unmarshaling JSON failed: %s", err)
+			return
+		}
+
+		err = fmt.Errorf("error: (%s) %s", resp.Status, werr.Message)
+		return
+	}
+
+	err = json.Unmarshal(body, &w)
+	if err != nil {
+		log.Debugf("%s", body)
+		log.Errorf("unmarshaling JSON failed: %s", err)
+		return
+	}
+
+	return
+}