YMapEvent.fromJson constructor

YMapEvent.fromJson(Object? json_)

Returns a new instance from a JSON value. May throw if the value does not have the expected structure.

Implementation

factory YMapEvent.fromJson(Object? json_) {
  final json = json_ is Map
      ? _spec.fields.map((f) => json_[f.label]).toList(growable: false)
      : json_;
  return switch (json) {
    [final target, final keys, final path] ||
    (final target, final keys, final path) =>
      YMapEvent(
        target: YMap.fromJson(target),
        keys: (keys! as Iterable)
            .map((e) => (() {
                  final l = e is Map
                      ? List.generate(2, (i) => e[i.toString()],
                          growable: false)
                      : e;
                  return switch (l) {
                    [final v0, final v1] || (final v0, final v1) => (
                        v0 is String ? v0 : (v0! as ParsedString).value,
                        YMapDelta.fromJson(v1),
                      ),
                    _ => throw Exception('Invalid JSON $e')
                  };
                })())
            .toList(),
        path: (path! as Iterable).map(EventPathItem.fromJson).toList(),
      ),
    _ => throw Exception('Invalid JSON $json_')
  };
}