62 lines
1.8 KiB
Dart
62 lines
1.8 KiB
Dart
import 'dart:convert';
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/// 信令消息模型，对应 Android 端的 SignalMessage。
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///
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/// 字段含义：
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/// - [type] 消息类型：REGISTER / OFFER / ANSWER / ICE_CANDIDATE
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/// - [fromDeviceId] 发送方设备 ID
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/// - [toDeviceId] 接收方设备 ID
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/// - [deviceType] 设备类型：CONTROLLER / CONTROLLED
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/// - [payload] JSON 字符串形式的负载（SDP / ICE 候选等）
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class SignalMessage {
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final String? type;
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final String? fromDeviceId;
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final String? toDeviceId;
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final String? deviceType;
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final String? payload;
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const SignalMessage({
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this.type,
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this.fromDeviceId,
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this.toDeviceId,
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this.deviceType,
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this.payload,
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});
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factory SignalMessage.fromJson(Map<String, dynamic> json) => SignalMessage(
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type: json['type'] as String?,
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fromDeviceId: json['fromDeviceId'] as String?,
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toDeviceId: json['toDeviceId'] as String?,
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deviceType: json['deviceType'] as String?,
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payload: json['payload'] as String?,
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);
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Map<String, dynamic> toJson() => {
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if (type != null) 'type': type,
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if (fromDeviceId != null) 'fromDeviceId': fromDeviceId,
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if (toDeviceId != null) 'toDeviceId': toDeviceId,
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if (deviceType != null) 'deviceType': deviceType,
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if (payload != null) 'payload': payload,
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};
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/// 便捷构造方法：payload 为任意 Map，会自动序列化为 JSON 字符串。
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factory SignalMessage.withPayload({
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required String type,
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required String fromDeviceId,
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required String toDeviceId,
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required String deviceType,
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required Map<String, dynamic> payload,
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}) {
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return SignalMessage(
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type: type,
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fromDeviceId: fromDeviceId,
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toDeviceId: toDeviceId,
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deviceType: deviceType,
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payload: jsonEncode(payload),
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);
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}
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@override
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String toString() => jsonEncode(toJson());
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}
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