MissionMessage.fromJson constructor

MissionMessage.fromJson(
  1. Map<String, dynamic> json
)

Strict parse: throws on a missing mission_id or any malformed step.

Implementation

factory MissionMessage.fromJson(Map<String, dynamic> json) {
  final m = MissionMessage.tryParse(json);
  if (m == null) {
    throw const FormatException('mission frame has no string `mission_id`');
  }
  if (!m.isValid) {
    throw FormatException('mission step ${m.invalidStepIndex} is malformed');
  }
  return m;
}