add web ui

internal/providers/openmeteo.go

@@ -17,34 +17,48 @@ type OpenMeteo struct {
 
 func (o *OpenMeteo) Name() string { return "open_meteo" }
 
+var openMeteoHourlyFields = []string{
+	"temperature_2m",
+	"pressure_msl",
+	"wind_speed_10m",
+	"wind_gusts_10m",
+	"wind_direction_10m",
+	"precipitation",
+	"cloud_cover",
+	"relative_humidity_1000hPa",
+}
+
+func OpenMeteoRequestURL(site Site, model string) (string, error) {
+	u, err := url.Parse("https://api.open-meteo.com/v1/ecmwf")
+	if err != nil {
+		return "", err
+	}
+	q := u.Query()
+	q.Set("latitude", fmt.Sprintf("%.6f", site.Latitude))
+	q.Set("longitude", fmt.Sprintf("%.6f", site.Longitude))
+	q.Set("hourly", join(openMeteoHourlyFields))
+	q.Set("wind_speed_unit", "ms")
+	q.Set("temperature_unit", "celsius")
+	q.Set("precipitation_unit", "mm")
+	u.RawQuery = q.Encode()
+	_ = model // endpoint is fixed to ECMWF; model is metadata only.
+	return u.String(), nil
+}
+
 func (o *OpenMeteo) Fetch(ctxDone <-chan struct{}, site Site, model string) (*ForecastResult, error) {
 	if o.Client == nil {
 		o.Client = &http.Client{Timeout: 15 * time.Second}
 	}
 
-	// Hourly fields supported by the ECMWF endpoint.
-	hourly := []string{
-		"temperature_2m",
-		"pressure_msl",
-		"wind_speed_10m",
-		"wind_gusts_10m",
-		"wind_direction_10m",
-		"precipitation",
-		"cloud_cover",
-		"relative_humidity_1000hPa",
+	reqURL, err := OpenMeteoRequestURL(site, model)
+	if err != nil {
+		return nil, err
 	}
 
-	u, _ := url.Parse("https://api.open-meteo.com/v1/ecmwf")
-	q := u.Query()
-	q.Set("latitude", fmt.Sprintf("%.6f", site.Latitude))
-	q.Set("longitude", fmt.Sprintf("%.6f", site.Longitude))
-	q.Set("hourly", join(hourly))
-	q.Set("wind_speed_unit", "ms")
-	q.Set("temperature_unit", "celsius")
-	q.Set("precipitation_unit", "mm")
-	u.RawQuery = q.Encode()
-
-	safeURL := *u
+	safeURL, err := url.Parse(reqURL)
+	if err != nil {
+		return nil, err
+	}
 	safeQuery := safeURL.Query()
 	if safeQuery.Has("apikey") {
 		safeQuery.Set("apikey", "redacted")
@@ -56,7 +70,7 @@ func (o *OpenMeteo) Fetch(ctxDone <-chan struct{}, site Site, model string) (*Fo
 	defer cancel()
 	go func() { <-ctxDone; cancel() }()
 
-	req, _ := http.NewRequestWithContext(ctx, "GET", u.String(), nil)
+	req, _ := http.NewRequestWithContext(ctx, "GET", reqURL, nil)
 	resp, err := o.Client.Do(req)
 	if err != nil {
 		return nil, err