UserMessage.fromJson constructor

UserMessage.fromJson(Map<String, dynamic> json)

Creates a UserMessage with the information stored in the json.

Throws a JsonMissingKeyException if there is missing one of the needed keys (BrokerKeys.identifier, BrokerKeys.receivers,BrokerKeys.sender) in the json. Throws a InvalidJsonSchemaException if some values doesn't match the expected value type.

Implementation

factory UserMessage.fromJson(Map<String, dynamic> json) {
  try {
    final UserMessage msg = UserMessage()
      ..generateFromJson(json)
      ..attachment = json.containsKey(BrokerKeys.attachments)
          ? Attachment.fromJson(
              json[BrokerKeys.attachments] as Map<String, dynamic>)
          : null
      ..subject = json[BrokerKeys.subject] as String?
      ..text = json[BrokerKeys.text] as String?;
    return msg;
  } on TypeError catch (e) {
    throw InvalidJsonSchemaException(
        e.stackTrace.toString(), json.toString());
  }
}