flutter/lib/pages/chat/notify/noFriend.dart

/// 聊天首页模板
library;

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:loopin/IM/im_service.dart';
import 'package:loopin/behavior/custom_scroll_behavior.dart';
import 'package:loopin/components/network_or_asset_image.dart';
import 'package:loopin/models/conversation_type.dart';
import 'package:loopin/pages/chat/notify_controller/notify_no_friend_controller.dart';
import 'package:loopin/styles/index.dart';
import 'package:loopin/utils/index.dart';
import 'package:loopin/utils/parse_message_summary.dart';
import 'package:tencent_cloud_chat_sdk/models/v2_tim_conversation_filter.dart';

// noFriend, //陌生人消息

class Nofriend extends StatefulWidget {
  const Nofriend({super.key});

  @override
  State<Nofriend> createState() => NofriendState();
}

class NofriendState extends State<Nofriend> with SingleTickerProviderStateMixin {
  bool isLoading = false; // 是否在加载中
  bool hasMore = true; // 是否还有更多数据
  final RxBool _throttleFlag = false.obs; // 滚动节流锁
  final ScrollController chatController = ScrollController();
  int page = 0;

  ///-------------------
  final dataController = Get.put<NotifyNoFriendController>(NotifyNoFriendController());

  RxList demoList = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15].obs;

  @override
  void initState() {
    super.initState();
    getMsgData();
    chatController.addListener(() {
      if (_throttleFlag.value) return;
      if (chatController.position.pixels >= chatController.position.maxScrollExtent - 50) {
        _throttleFlag.value = true;
        getMsgData().then((_) {
          // 解锁
          Future.delayed(Duration(milliseconds: 1000), () {
            _throttleFlag.value = false;
          });
        });
      }
    });
  }

  @override
  void dispose() {
    logger.e('dispose');
    Get.delete<NotifyNoFriendController>();
    chatController.dispose();
    super.dispose();
  }

  // 分页获取陌生人会话
  Future<void> getMsgData() async {
    final res = await ImService.instance.getConversationListByFilter(
      filter: V2TimConversationFilter(conversationGroup: ConversationType.noFriend.name),
      nextSeq: page,
    );
    logger.i('获取会话数据成功：${res.data!.toLogString()}');
    if (res.success && res.data != null) {
      final newList = res.data!.conversationList ?? [];
      // 已有会话ID集合
      final existingIds = dataController.convList.map((e) => e.conversationID).where((id) => id.isNotEmpty).toSet();
      // 过滤掉已存在的会话
      final filtered = newList.where((c) => !existingIds.contains(c.conversationID)).toList();

      final isFinished = res.data!.isFinished ?? true;
      dataController.convList.addAll(filtered);
      if (isFinished) {
        hasMore = false;
        // 加载没数据了
        page = 0;
      } else {
        page = int.parse(res.data!.nextSeq ?? '0');
      }
      logger.i('获取会话数据成功：$newList');
    } else {
      logger.e('获取会话数据失败：${res.data!.isFinished}');
    }
  }

  // 下拉刷新
  Future<void> handleRefresh() async {
    await Future.delayed(Duration(seconds: 5));
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey[50],
      appBar: AppBar(
        centerTitle: true,
        forceMaterialTransparency: true,
        bottom: PreferredSize(
          preferredSize: Size.fromHeight(1.0),
          child: Container(
            color: Colors.grey[300],
            height: 1.0,
          ),
        ),
        title: Text(
          '陌生人消息',
          style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
        ),
        actions: [],
      ),
      body: ScrollConfiguration(
        behavior: CustomScrollBehavior().copyWith(scrollbars: false),
        child: Column(
          children: [
            Expanded(
              child: RefreshIndicator(
                  backgroundColor: Colors.white,
                  color: Color(0xFFFF5000),
                  displacement: 10.0,
                  onRefresh: handleRefresh,
                  child: Obx(() {
                    // final chatList = controller.chatList;

                    return ListView.builder(
                      shrinkWrap: true,
                      physics: BouncingScrollPhysics(),
                      itemCount: dataController.convList.length,
                      itemBuilder: (context, index) {
                        final conv = dataController.convList[index];
                        final isNoFriend = conv.conversationGroupList?.contains(ConversationType.noFriend.name) ?? false;

                        return Ink(
                          key: ValueKey(conv.conversationID),

                          // color: conv['topMost'] == null ? Colors.white : Colors.grey[100], //置顶颜色
                          child: InkWell(
                            splashColor: Colors.grey[200],
                            child: Container(
                              padding: const EdgeInsets.symmetric(horizontal: 15.0, vertical: 10.0),
                              child: Row(
                                spacing: 10.0,
                                children: <Widget>[
                                  // 头图
                                  ClipOval(
                                    child: NetworkOrAssetImage(
                                      imageUrl: conv.faceUrl,
                                      width: 50,
                                      height: 50,
                                    ),
                                  ),

                                  // 消息
                                  Expanded(
                                    child: Column(
                                      crossAxisAlignment: CrossAxisAlignment.start,
                                      children: <Widget>[
                                        Text(
                                          conv.showName ?? '未知',
                                          style: TextStyle(fontSize: 16, fontWeight: FontWeight.normal),
                                        ),
                                        const SizedBox(height: 2.0),
                                        Text(
                                          conv.lastMessage != null ? parseMessageSummary(conv.lastMessage!) : '',
                                          style: const TextStyle(color: Colors.grey, fontSize: 13.0),
                                          overflow: TextOverflow.ellipsis,
                                        ),
                                      ],
                                    ),
                                  ),
                                  // 右侧

                                  Column(
                                    crossAxisAlignment: CrossAxisAlignment.end,
                                    children: <Widget>[
                                      Visibility(
                                        visible: true,
                                        child: Text(
                                          // 转成日期字符串显示
                                          Utils.formatTime(conv.lastMessage!.timestamp ?? DateTime.now().millisecondsSinceEpoch ~/ 1000),
                                          style: const TextStyle(color: Colors.grey, fontSize: 12.0),
                                        ),
                                      ),
                                      const SizedBox(height: 5.0),
                                      // 数字角标
                                      Visibility(
                                        visible: (conv.unreadCount ?? 0) > 0,
                                        child: FStyle.badge(conv.unreadCount ?? 0),
                                      ),
                                    ],
                                  ),
                                  Visibility(
                                    visible: false,
                                    child: const Icon(
                                      Icons.arrow_forward_ios,
                                      color: Colors.blueGrey,
                                      size: 14.0,
                                    ),
                                  ),
                                ],
                              ),
                            ),
                            onTap: () {
                              Get.toNamed('/chatNoFriend', arguments: conv);
                            },
                          ),
                        );
                      },
                    );
                  })),
            ),
          ],
        ),
      ),
    );
  }
}