63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
package met
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import (
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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)
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type Met struct {
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siteName string
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}
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func New(siteName string) (*Met, error) {
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if siteName == "" {
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return nil, fmt.Errorf("`siteName` must be defined.")
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}
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return &Met{
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siteName: siteName,
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}, nil
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}
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func (m *Met) Forecast(lat, lon float64, alt *int) (*LocationForecastResult, error) {
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url := "https://api.met.no/weatherapi/locationforecast/2.0/complete"
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req, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return nil, err
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}
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q := req.URL.Query()
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q.Add("lat", fmt.Sprintf("%.4f", lat))
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q.Add("lon", fmt.Sprintf("%.4f", lon))
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if alt != nil {
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q.Add("altitude", fmt.Sprintf("%d", alt))
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}
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req.URL.RawQuery = q.Encode()
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req.Header.Set("User-Agent", m.siteName)
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("%s", resp.Status)
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}
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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forecast := LocationForecastResult{}
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err = json.Unmarshal(body, &forecast)
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if err != nil {
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return nil, err
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}
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return &forecast, nil
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}
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