Added metrics route

model/metricsModel.go

@@ -0,0 +1,59 @@
+package model
+
+import (
+	"encoding/json"
+	"math"
+	"net/http"
+	"net/url"
+	"strconv"
+
+	"github.com/ceticamarco/zephyr/types"
+)
+
+func GetMetrics(city *types.City, apiKey string) (types.Metrics, error) {
+	url, err := url.Parse(WTR_URL)
+	if err != nil {
+		return types.Metrics{}, err
+	}
+
+	params := url.Query()
+	params.Set("lat", strconv.FormatFloat(city.Lat, 'f', -1, 64))
+	params.Set("lon", strconv.FormatFloat(city.Lon, 'f', -1, 64))
+	params.Set("appid", apiKey)
+	params.Set("units", "metric")
+	params.Set("exclude", "minutely,hourly,daily,alerts")
+
+	url.RawQuery = params.Encode()
+
+	res, err := http.Get(url.String())
+	if err != nil {
+		return types.Metrics{}, err
+	}
+	defer res.Body.Close()
+
+	// Structures representing the JSON response
+	type CurrentRes struct {
+		Humidity   int     `json:"humidity"`
+		Pressure   int     `json:"pressure"`
+		DewPoint   float64 `json:"dew_point"`
+		UvIndex    float64 `json:"uvi"`
+		Visibility float64 `json:"visibility"`
+	}
+
+	type MetricsRes struct {
+		Current CurrentRes `json:"current"`
+	}
+
+	var metricRes MetricsRes
+	if err := json.NewDecoder(res.Body).Decode(&metricRes); err != nil {
+		return types.Metrics{}, err
+	}
+
+	return types.Metrics{
+		Humidity:   strconv.Itoa(metricRes.Current.Humidity),
+		Pressure:   strconv.Itoa(metricRes.Current.Pressure),
+		DewPoint:   strconv.FormatFloat(metricRes.Current.DewPoint, 'f', -1, 64),
+		UvIndex:    strconv.FormatFloat(math.Round(metricRes.Current.UvIndex), 'f', -1, 64),
+		Visibility: strconv.FormatFloat((metricRes.Current.Visibility / 1000), 'f', -1, 64),
+	}, nil
+}