implement openweather main

internal/pkg/openweather/forecaster.go

@@ -0,0 +1,43 @@
+package openweather
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+
+	"resty.dev/v3"
+)
+
+var (
+	ErrForecast = errors.New("error in get forecast")
+)
+
+func Forecast(ctx context.Context, key string, lat float64, lon float64) (*ForecastResponse, error) {
+	client := resty.New()
+
+	defer func() {
+		err := client.Close()
+		if err != nil {
+			log.Println("error in close client", err)
+		}
+	}()
+
+	resp, err := client.R().
+		SetContext(ctx).
+		SetQueryParam("lat", fmt.Sprintf("%f", lat)).
+		SetQueryParam("lon", fmt.Sprintf("%f", lon)).
+		SetQueryParam("appid", key).
+		SetQueryParam("units", "metric").
+		SetResult(&ForecastResponse{}). //nolint:exhaustruct
+		Get("https://api.openweathermap.org/data/2.5/forecast")
+	if err != nil {
+		return nil, fmt.Errorf("error in get forecast: %w", err)
+	}
+
+	if resp.IsError() {
+		return nil, fmt.Errorf("%w: %s, %s", ErrForecast, resp.Status(), resp.String())
+	}
+
+	return resp.Result().(*ForecastResponse), nil //nolint:forcetypeassert
+}