addRouteNode function

RouteGraphFile addRouteNode(RouteGraphFile g, String screen, String ts)

Record a visit to screen: increment its visitCount or add it.

Implementation

RouteGraphFile addRouteNode(RouteGraphFile g, String screen, String ts) {
  final s = screen.trim();
  if (s.isEmpty) return g;

  final nodes = List<RouteGraphNode>.of(g.nodes);
  final i = nodes.indexWhere((n) => n.screen == s);
  if (i >= 0) {
    nodes[i] = nodes[i].copyWith(
      lastSeen: ts,
      visitCount: nodes[i].visitCount + 1,
    );
  } else {
    nodes.add(RouteGraphNode(
      screen: s,
      firstSeen: ts,
      lastSeen: ts,
      visitCount: 1,
    ));
  }
  return RouteGraphFile(
    schemaVersion: g.schemaVersion,
    type: g.type,
    nodes: nodes,
    edges: g.edges,
    sync: g.sync.markDirty(ts),
  );
}