build method

Implementation

@override
EntityChangeBinding build({required String type}) {
  final graph = ref.watch(entityGraphProvider);
  final registry = ref.watch(entityTransportRegistryProvider);
  final transport = registry.get<T>(type);
  final subscription = transport.subscribe((event) {
    switch (event.op) {
      case ChangeOp.insert:
      case ChangeOp.update:
        final row = event.row;
        if (row != null) {
          graph.upsertEntity(type, event.id, transport.toGraph(row));
          graph.setEntityFetched(type, event.id);
        }
        graph.invalidateListsForType(type);
      case ChangeOp.delete:
        graph.removeEntity(type, event.id);
    }
  });
  if (subscription != null) ref.onDispose(subscription.cancel);
  return EntityChangeBinding(isActive: subscription != null);
}