Publish current app and server

server/internal/store/analytics.go

@@ -78,6 +78,46 @@ type RowStat struct {
 	SelectRate  float64 `json:"selectRate"`
 }
 
+// UserRowStats is the per-profile counterpart to the admin aggregate. It gives the
+// home composer enough evidence to gently demote shelves that a viewer repeatedly
+// passes over without turning a couple of accidental focus moves into a preference.
+func (s *Store) UserRowStats(
+	ctx context.Context,
+	userID string,
+	since time.Time,
+) ([]RowStat, error) {
+	rows, err := s.pool.Query(ctx, `
+		SELECT row_id,
+		       (array_agg(row_kind ORDER BY occurred_at DESC))[1] AS row_kind,
+		       count(*) FILTER (WHERE event = 'impression') AS impressions,
+		       count(*) FILTER (WHERE event = 'focus')      AS focuses,
+		       count(*) FILTER (WHERE event = 'select')     AS selects,
+		       coalesce(sum(dwell_ms), 0)                   AS dwell_ms
+		FROM row_events
+		WHERE emby_user_id = $1 AND occurred_at >= $2
+		GROUP BY row_id`, userID, since)
+	if err != nil {
+		return nil, fmt.Errorf("store: user row stats: %w", err)
+	}
+	defer rows.Close()
+	stats := []RowStat{}
+	for rows.Next() {
+		var stat RowStat
+		if err := rows.Scan(
+			&stat.RowID, &stat.RowKind, &stat.Impressions, &stat.Focuses,
+			&stat.Selects, &stat.DwellMs,
+		); err != nil {
+			return nil, err
+		}
+		stat.Viewers = 1
+		if stat.Impressions > 0 {
+			stat.SelectRate = float64(stat.Selects) / float64(stat.Impressions)
+		}
+		stats = append(stats, stat)
+	}
+	return stats, rows.Err()
+}
+
 func (s *Store) InsertRowEvents(ctx context.Context, events []RowEvent) error {
 	if len(events) == 0 {
 		return nil