flutter/lib/IM/im_message.dart

import 'package:logger/logger.dart';
import 'package:loopin/IM/im_result.dart';
import 'package:tencent_cloud_chat_sdk/enum/message_priority_enum.dart';
import 'package:tencent_cloud_chat_sdk/enum/offlinePushInfo.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_message.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_value_callback.dart';
import 'package:tencent_cloud_chat_sdk/tencent_im_sdk_plugin.dart';

final logger = Logger();

class IMMessage {
  /// 发送文本消息
  Future<ImResult> sendText({
    required String text,
    String? toUserID,
    String? groupID,
    String? data,
  }) async {
    // 必须且只能设置一个：toUserID（单聊）或 groupID（群聊）
    if ((toUserID == null && groupID == null) || (toUserID != null && groupID != null)) {
      return ImResult(
        success: false,
        code: -1,
        desc: "只能指定一个 receiver（toUserID）或 groupID",
      );
    }

    // 创建消息
    final createRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().createTextMessage(text: text);

    if (createRes.code != 0 || createRes.data == null) {
      return ImResult(
        success: false,
        code: createRes.code,
        desc: "创建消息失败",
      );
    }
    final V2TimMessage? messageInfo = createRes.data?.messageInfo;

    V2TimValueCallback<V2TimMessage> sendRes;

    // 单聊
    if (toUserID != null) {
      sendRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().sendMessage(
            message: messageInfo,
            receiver: toUserID,
            groupID: "",
            priority: MessagePriorityEnum.V2TIM_PRIORITY_DEFAULT,
            onlineUserOnly: false,
            isExcludedFromUnreadCount: false,
            isExcludedFromLastMessage: false,
            needReadReceipt: false,
            offlinePushInfo: OfflinePushInfo(title: "新消息", desc: text),
            cloudCustomData: "",
            localCustomData: "",
          );
    } else {
      // 群聊
      sendRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().sendMessage(
            message: messageInfo,
            receiver: "",
            groupID: groupID!,
            priority: MessagePriorityEnum.V2TIM_PRIORITY_DEFAULT,
            onlineUserOnly: false,
            isExcludedFromUnreadCount: false,
            isExcludedFromLastMessage: false,
            needReadReceipt: false,
            offlinePushInfo: OfflinePushInfo(title: "新群聊消息", desc: text),
            cloudCustomData: "",
            localCustomData: "",
          );
    }

    return ImResult(
      success: sendRes.code == 0,
      code: sendRes.code,
      desc: sendRes.desc,
      data: sendRes.data,
    );
  }

  /// 发送自定义消息
  Future<ImResult> sendCustomMessage({
    required String data,
    String? toUserID,
    String? groupID,
    String? description,
    String? extension,
  }) async {
    // 校验逻辑：单聊或群聊，二选一
    if ((toUserID == null && groupID == null) || (toUserID != null && groupID != null)) {
      return ImResult(
        success: false,
        code: -1,
        desc: "只能指定一个 receiver（toUserID）或 groupID",
      );
    }

    // 1. 创建自定义消息
    final createRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().createCustomMessage(
          data: data,
          desc: description ?? '',
          extension: extension ?? '',
        );

    if (createRes.code != 0 || createRes.data?.id == null) {
      return ImResult(
        success: false,
        code: createRes.code,
        desc: "创建自定义消息失败",
      );
    }
    final V2TimMessage? messageInfo = createRes.data?.messageInfo;

    // 2. 发送消息
    final sendRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().sendMessage(
          message: messageInfo,
          receiver: toUserID ?? '',
          groupID: groupID ?? '',
          priority: MessagePriorityEnum.V2TIM_PRIORITY_DEFAULT,
          onlineUserOnly: false,
          isExcludedFromUnreadCount: false,
          isExcludedFromLastMessage: false,
          needReadReceipt: false,
          offlinePushInfo: OfflinePushInfo(
            title: "自定义消息",
            desc: description ?? '您收到一条自定义消息',
          ),
          cloudCustomData: "",
          localCustomData: "",
        );

    return ImResult(
      success: sendRes.code == 0,
      code: sendRes.code,
      desc: sendRes.desc,
    );
  }

  /// 构造单聊伪消息
  Future<ImResult> insertTimeLabel(String data, String userId) async {
    final customMsgRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().createCustomMessage(
          data: data,
          desc: "时间标签",
          extension: "",
        );

    if (customMsgRes.code != 0 || customMsgRes.data?.id == null) {
      return ImResult(
        success: false,
        code: customMsgRes.code,
        desc: "创建时间标签消息失败",
      );
    }

    final timeMsg = customMsgRes.data!.messageInfo;
    timeMsg!.localCustomData = 'time_label';

    return ImResult(
      success: true,
      code: customMsgRes.code,
      desc: "success",
      data: timeMsg,
    );

    // final sendRes = await TencentImSDKPlugin.v2TIMManager.getMessageManager().sendMessage(
    //       message: timeMsg,
    //       receiver: userId,
    //       groupID: "",
    //       onlineUserOnly: false,
    //       isExcludedFromUnreadCount: true,
    //       isExcludedFromLastMessage: true,
    //       needReadReceipt: false,
    //       cloudCustomData: "",
    //       localCustomData: "time_label",
    //     );

    // return ImResult(
    //   success: sendRes.code == 0,
    //   code: sendRes.code,
    //   desc: sendRes.code == 0 ? "时间标签发送成功" : sendRes.desc,
    //   data: timeMsg,
    // );
  }
}