first commit

internal/providers/wunderground.go

@@ -0,0 +1,99 @@
+package providers
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+)
+
+// WU PWS upload protocol endpoint. :contentReference[oaicite:1]{index=1}
+const wuEndpoint = "https://rtupdate.wunderground.com/weatherstation/updateweatherstation.php"
+
+type WundergroundClient struct {
+	HTTP *http.Client
+}
+
+type WUUpload struct {
+	StationID  string
+	StationKey string
+
+	// Units required by WU:
+	// tempf (F), wind mph, baromin (inHg), rain inches.
+	TempC      float64
+	Humidity   float64
+	WindDirDeg float64
+	WindAvgMS  float64
+	WindMaxMS  float64
+	UVI        float64
+	SolarWm2   *float64 // your payload is lux; leave nil unless you add W/m^2 later
+
+	RainLastHourMM float64
+	DailyRainMM    float64
+
+	DateUTC string // "now" recommended
+}
+
+func (c *WundergroundClient) Upload(ctx context.Context, u WUUpload) (string, error) {
+	if c.HTTP == nil {
+		c.HTTP = &http.Client{Timeout: 10 * time.Second}
+	}
+
+	q := url.Values{}
+	q.Set("ID", u.StationID)
+	q.Set("PASSWORD", u.StationKey)
+	q.Set("action", "updateraw")
+	q.Set("dateutc", u.DateUTC) // "now" ok :contentReference[oaicite:2]{index=2}
+
+	// Required-ish observation fields (only set what we have)
+	q.Set("tempf", fmt.Sprintf("%.2f", cToF(u.TempC)))
+	q.Set("humidity", fmt.Sprintf("%.0f", u.Humidity))
+
+	q.Set("winddir", fmt.Sprintf("%.0f", u.WindDirDeg))
+	q.Set("windspeedmph", fmt.Sprintf("%.2f", msToMph(u.WindAvgMS)))
+	q.Set("windgustmph", fmt.Sprintf("%.2f", msToMph(u.WindMaxMS)))
+
+	// Rain (inches)
+	q.Set("rainin", fmt.Sprintf("%.4f", mmToIn(u.RainLastHourMM)))
+	q.Set("dailyrainin", fmt.Sprintf("%.4f", mmToIn(u.DailyRainMM)))
+
+	// UV index
+	q.Set("UV", fmt.Sprintf("%.2f", u.UVI))
+
+	// NOTE: your WS90 payload provides light in lux, not W/m^2.
+	// WU expects solarradiation in W/m^2, so we omit it unless you add a conversion/actual sensor field.
+	if u.SolarWm2 != nil {
+		q.Set("solarradiation", fmt.Sprintf("%.2f", *u.SolarWm2))
+	}
+
+	// Optional: a software identifier
+	q.Set("softwaretype", "go-weatherstation-go")
+
+	reqURL := wuEndpoint + "?" + q.Encode()
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL, nil)
+	if err != nil {
+		return "", err
+	}
+
+	resp, err := c.HTTP.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	// WU typically returns plain text like "success"
+	if resp.StatusCode/100 != 2 {
+		return "", fmt.Errorf("wunderground upload HTTP %d", resp.StatusCode)
+	}
+
+	// Read small body
+	buf := make([]byte, 2048)
+	n, _ := resp.Body.Read(buf)
+	return strconv.Quote(string(buf[:n])), nil
+}
+
+func cToF(c float64) float64     { return (c * 9.0 / 5.0) + 32.0 }
+func msToMph(ms float64) float64 { return ms * 2.2369362920544 }
+func mmToIn(mm float64) float64  { return mm / 25.4 }