NodeGraph<T>.fromJson constructor

NodeGraph<T>.fromJson(Map<String, dynamic> json, T fromJsonT(Object? json), { Node<T> nodeFromJson(Map<String, dynamic> json, T fromJsonT(Object? json))?, })

Implementation

factory NodeGraph.fromJson(
  Map<String, dynamic> json,
  T Function(Object? json) fromJsonT, {
  Node<T> Function(
    Map<String, dynamic> json,
    T Function(Object? json) fromJsonT,
  )?
  nodeFromJson,
}) {
  final actualNodeFromJson = nodeFromJson ?? defaultNodeFromJson<T>;

  final nodesJson = json['nodes'] as List<dynamic>? ?? [];
  final nodes = nodesJson
      .map((e) => actualNodeFromJson(e as Map<String, dynamic>, fromJsonT))
      .toList();

  final connectionsJson = json['connections'] as List<dynamic>? ?? [];
  final connections = connectionsJson
      .map((e) => Connection.fromJson(e as Map<String, dynamic>))
      .toList();

  final viewport = json['viewport'] != null
      ? GraphViewport.fromJson(json['viewport'] as Map<String, dynamic>)
      : GraphViewport();

  return NodeGraph<T>(
    nodes: nodes,
    connections: connections,
    viewport: viewport,
    metadata: json['metadata'] as Map<String, dynamic>? ?? {},
  );
}