pota

internal/pota/hunterlog.go

@@ -0,0 +1,132 @@
+package pota
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+// hunterLogURL is the authenticated POTA user logbook endpoint (paginated).
+// hunterOnly=1 restricts it to the user's chaser/hunter QSOs.
+const hunterLogURL = "https://api.pota.app/user/logbook?hunterOnly=1&page=%d&size=%d"
+
+// HunterQSO is one entry from the POTA hunter log: a contact the user made with
+// a park activator, carrying the park reference to stamp onto the local QSO.
+type HunterQSO struct {
+	Worked    string    `json:"worked"`    // activator callsign (the station worked)
+	Date      time.Time `json:"date"`      // QSO date/time (UTC)
+	Band      string    `json:"band"`      // ADIF band, e.g. "20m"
+	Mode      string    `json:"mode"`      // logged mode
+	Reference string    `json:"reference"` // park ref, e.g. "US-2072"
+}
+
+// hunterEntry mirrors the POTA API logbook record (fields we use).
+//
+// IMPORTANT: POTA logbook entries come from the ACTIVATOR's uploaded log, so
+// "station_callsign" is the activator (the park station you worked) and
+// "worked_callsign" is YOU (the hunter, whom the activator worked). To match a
+// local QSO — whose callsign field holds the activator — we key on
+// station_callsign, NOT worked_callsign.
+type hunterEntry struct {
+	StationCallsign string `json:"station_callsign"` // the activator (park station)
+	WorkedCallsign  string `json:"worked_callsign"`  // the hunter (you)
+	QSODateTime     string `json:"qsoDateTime"`
+	Band            string `json:"band"`
+	LoggedMode      string `json:"loggedMode"`
+	Reference       string `json:"reference"`
+}
+
+// FetchHunterLog downloads the user's entire POTA hunter log, page by page,
+// using their pota.app session token as the Authorization header. logf may be
+// nil. Returns a friendly error on an expired/invalid token (HTTP 401/403).
+func FetchHunterLog(ctx context.Context, token string, logf func(string, ...any)) ([]HunterQSO, error) {
+	token = strings.TrimSpace(token)
+	if token == "" {
+		return nil, fmt.Errorf("no POTA token — paste it from pota.app (DevTools → Network → Authorization header)")
+	}
+	client := &http.Client{Timeout: 30 * time.Second}
+	const size = 100
+	const maxPages = 5000 // safety bound
+
+	var out []HunterQSO
+	total := -1
+	for page := 1; page <= maxPages; page++ {
+		url := fmt.Sprintf(hunterLogURL, page, size)
+		req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+		if err != nil {
+			return nil, err
+		}
+		req.Header.Set("Authorization", token)
+		req.Header.Set("Accept", "application/json")
+		resp, err := client.Do(req)
+		if err != nil {
+			return nil, fmt.Errorf("POTA fetch: %w", err)
+		}
+		switch {
+		case resp.StatusCode == http.StatusUnauthorized || resp.StatusCode == http.StatusForbidden:
+			resp.Body.Close()
+			return nil, fmt.Errorf("POTA rejected the token (HTTP %d) — it has likely expired; re-copy it from pota.app", resp.StatusCode)
+		case resp.StatusCode != http.StatusOK:
+			resp.Body.Close()
+			return nil, fmt.Errorf("POTA HTTP %d", resp.StatusCode)
+		}
+		var body struct {
+			Count   int           `json:"count"`
+			Entries []hunterEntry `json:"entries"`
+		}
+		err = json.NewDecoder(resp.Body).Decode(&body)
+		resp.Body.Close()
+		if err != nil {
+			return nil, fmt.Errorf("POTA decode: %w", err)
+		}
+		total = body.Count
+		for _, e := range body.Entries {
+			ref := strings.ToUpper(strings.TrimSpace(e.Reference))
+			// The activator is the station we worked → station_callsign.
+			act := strings.ToUpper(strings.TrimSpace(e.StationCallsign))
+			if act == "" {
+				act = strings.ToUpper(strings.TrimSpace(e.WorkedCallsign)) // fallback
+			}
+			if ref == "" || act == "" {
+				continue
+			}
+			out = append(out, HunterQSO{
+				Worked:    act,
+				Date:      parseHunterTime(e.QSODateTime),
+				Band:      strings.ToLower(strings.TrimSpace(e.Band)),
+				Mode:      strings.ToUpper(strings.TrimSpace(e.LoggedMode)),
+				Reference: ref,
+			})
+		}
+		if logf != nil {
+			logf("pota: hunter log page %d (%d/%d)", page, len(out), total)
+		}
+		if len(body.Entries) == 0 || (total >= 0 && len(out) >= total) {
+			break
+		}
+	}
+	return out, nil
+}
+
+// parseHunterTime parses POTA's qsoDateTime, tolerating ISO variants (with/out
+// 'T', timezone, or fractional seconds). POTA times are UTC.
+func parseHunterTime(s string) time.Time {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return time.Time{}
+	}
+	for _, layout := range []string{
+		time.RFC3339Nano, time.RFC3339,
+		"2006-01-02T15:04:05.000Z", "2006-01-02T15:04:05Z", "2006-01-02T15:04:05",
+		"2006-01-02 15:04:05.000", "2006-01-02 15:04:05", "2006-01-02 15:04:05Z",
+		"2006-01-02T15:04Z", "2006-01-02T15:04", "2006-01-02 15:04",
+	} {
+		if t, err := time.Parse(layout, s); err == nil {
+			return t.UTC()
+		}
+	}
+	return time.Time{}
+}