0.3.07

server/internal/store/my_shows.go

@@ -68,6 +68,46 @@ type SonarrSeriesStatusChange struct {
 	Current        SonarrSeriesStatus
 }
 
+// LatestSonarrSeriesStatuses returns Sonarr's most recently observed lifecycle for each
+// TVDB id. The history table is change-only, so the newest row is also the current value.
+func (s *Store) LatestSonarrSeriesStatuses(
+	ctx context.Context, tvdbIDs []int,
+) (map[int]string, error) {
+	statuses := map[int]string{}
+	if len(tvdbIDs) == 0 {
+		return statuses, nil
+	}
+	rows, err := s.pool.Query(ctx, `
+		SELECT DISTINCT ON (tvdb_id) tvdb_id, status
+		FROM sonarr_series_status_history
+		WHERE tvdb_id = ANY($1) AND tvdb_id > 0
+		ORDER BY tvdb_id, observed_at DESC, id DESC`, tvdbIDs)
+	if err != nil {
+		return nil, fmt.Errorf("store: read latest Sonarr series statuses: %w", err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var tvdbID int
+		var status string
+		if err := rows.Scan(&tvdbID, &status); err != nil {
+			return nil, fmt.Errorf("store: scan latest Sonarr series status: %w", err)
+		}
+		statuses[tvdbID] = status
+	}
+	return statuses, rows.Err()
+}
+
+// SonarrSeriesStatusRevision is an opaque, monotonic version of the stored lifecycle
+// catalogue. It changes whenever a scan records a first sighting or a transition.
+func (s *Store) SonarrSeriesStatusRevision(ctx context.Context) (int64, error) {
+	var revision int64
+	if err := s.pool.QueryRow(ctx,
+		`SELECT COALESCE(max(id), 0) FROM sonarr_series_status_history`).Scan(&revision); err != nil {
+		return 0, fmt.Errorf("store: read Sonarr series status revision: %w", err)
+	}
+	return revision, nil
+}
+
 func (s *Store) SaveUserShow(ctx context.Context, userID string, show UserShow) error {
 	_, err := s.pool.Exec(ctx, `
 		INSERT INTO user_shows (emby_user_id, item_id, title, year, image_tag)