chore: release v0.25.9

internal/qso/qso.go

@@ -2691,6 +2691,51 @@ func (r *Repo) DedupeKeyIDs(ctx context.Context) (map[string]int64, error) {
 	return out, rows.Err()
 }
 
+// DedupeClassKey is DedupeKey with the mode collapsed to its CLASS (Phone / CW /
+// Digital).
+//
+// For matching a downloaded confirmation whose mode is not the one you logged.
+// LoTW does not hand back the submode it was given: a contact uploaded as FT4,
+// FT8 or anything else digital comes back as the mode GROUP, "DATA". Matched on
+// the exact string that is simply never equal, and the operator is told their
+// own QSO is not in their log — which is how a confirmed contact goes unrecorded.
+func DedupeClassKey(callsign, qsoDateMinute, band, mode string) string {
+	return strings.ToUpper(callsign) + "|" + qsoDateMinute + "|" + strings.ToLower(band) + "|" + modeClass(mode)
+}
+
+// DedupeClassKeyIDs is DedupeKeyIDs at mode-CLASS granularity, for the second
+// pass when the exact key misses.
+//
+// A key shared by more than one QSO maps to 0 — AMBIGUOUS, not "pick one". Two
+// contacts with the same station, on the same band, in the same minute, in two
+// digital modes is barely physical; but if it ever happens, stamping the
+// confirmation on whichever row the map happened to keep would be a silent
+// error in someone's award credit. Better to report it unmatched.
+func (r *Repo) DedupeClassKeyIDs(ctx context.Context) (map[string]int64, error) {
+	rows, err := r.db.QueryContext(ctx, `
+		SELECT id, callsign, substr(qso_date, 1, 16), band, mode
+		FROM qso`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	out := make(map[string]int64, 1024)
+	for rows.Next() {
+		var id int64
+		var call, when, band, mode string
+		if err := rows.Scan(&id, &call, &when, &band, &mode); err != nil {
+			return nil, err
+		}
+		k := DedupeClassKey(call, when, band, mode)
+		if prev, seen := out[k]; seen && prev != id {
+			out[k] = 0
+			continue
+		}
+		out[k] = id
+	}
+	return out, rows.Err()
+}
+
 // matchRef is one local QSO's time + id, for time-window confirmation matching.
 type matchRef struct {
 	when time.Time