PiliPlus/lib/pages/member_dynamics/view.dart

import 'package:easy_debounce/easy_throttle.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:PiliPalaX/pages/member_dynamics/index.dart';
import 'package:PiliPalaX/utils/utils.dart';

import '../../common/constants.dart';
import '../../common/widgets/http_error.dart';
import '../../utils/grid.dart';
import '../../utils/storage.dart';
import '../dynamics/widgets/dynamic_panel.dart';
import 'package:waterfall_flow/waterfall_flow.dart';

class MemberDynamicsPage extends StatefulWidget {
  const MemberDynamicsPage({super.key, this.mid});

  final int? mid;

  @override
  State<MemberDynamicsPage> createState() => _MemberDynamicsPageState();
}

class _MemberDynamicsPageState extends State<MemberDynamicsPage>
    with AutomaticKeepAliveClientMixin {
  late MemberDynamicsController _memberDynamicController;
  late int mid;
  late bool dynamicsWaterfallFlow;

  @override
  bool get wantKeepAlive => true;

  @override
  void initState() {
    super.initState();
    mid = widget.mid ?? int.parse(Get.parameters['mid']!);
    final String heroTag = Utils.makeHeroTag(mid);
    _memberDynamicController =
        Get.put(MemberDynamicsController(widget.mid), tag: heroTag);
    // _memberDynamicController.scrollController.addListener(
    //   () {
    //     if (_memberDynamicController.scrollController.position.pixels >=
    //         _memberDynamicController.scrollController.position.maxScrollExtent -
    //             200) {
    //       EasyThrottle.throttle(
    //           'member_dynamics', const Duration(milliseconds: 1000), () {
    //         _memberDynamicController.onLoad();
    //       });
    //     }
    //   },
    // );
    dynamicsWaterfallFlow = GStorage.setting
        .get(SettingBoxKey.dynamicsWaterfallFlow, defaultValue: true);
  }

  @override
  void dispose() {
    // _memberDynamicController.scrollController.removeListener(() {});
    _memberDynamicController.scrollController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return widget.mid == null
        ? Scaffold(
            appBar: AppBar(
              titleSpacing: 0,
              centerTitle: false,
              title:
                  Text('Ta的动态', style: Theme.of(context).textTheme.titleMedium),
            ),
            body: _buildBody,
          )
        : _buildBody;
  }

  Widget get _buildBody => CustomScrollView(
        physics: const AlwaysScrollableScrollPhysics(),
        // controller: _memberDynamicController.scrollController,
        slivers: [
          FutureBuilder(
            future: _memberDynamicController.futureBuilderFuture,
            builder: (context, snapshot) {
              if (snapshot.connectionState == ConnectionState.done) {
                if (snapshot.data != null) {
                  Map data = snapshot.data as Map;
                  List list = _memberDynamicController.dynamicsList;
                  if (data['status']) {
                    return Obx(() {
                      if (list.isEmpty) {
                        return const SliverToBoxAdapter();
                      }
                      if (!dynamicsWaterfallFlow) {
                        return SliverCrossAxisGroup(
                          slivers: [
                            const SliverFillRemaining(),
                            SliverConstrainedCrossAxis(
                                maxExtent: Grid.maxRowWidth * 2,
                                sliver: SliverList(
                                  delegate: SliverChildBuilderDelegate(
                                    (context, index) {
                                      if (index == list.length - 1) {
                                        EasyThrottle.throttle('member_dynamics',
                                            const Duration(milliseconds: 1000),
                                            () {
                                          _memberDynamicController.onLoad();
                                        });
                                      }
                                      return DynamicPanel(item: list[index]);
                                    },
                                    childCount: list.length,
                                  ),
                                )),
                            const SliverFillRemaining(),
                          ],
                        );
                      }
                      return SliverWaterfallFlow.extent(
                          maxCrossAxisExtent: Grid.maxRowWidth * 2,
                          //cacheExtent: 0.0,
                          crossAxisSpacing: StyleString.safeSpace,
                          mainAxisSpacing: StyleString.safeSpace,

                          /// follow max child trailing layout offset and layout with full cross axis extend
                          /// last child as loadmore item/no more item in [GridView] and [WaterfallFlow]
                          /// with full cross axis extend
                          //  LastChildLayoutType.fullCrossAxisExtend,

                          /// as foot at trailing and layout with full cross axis extend
                          /// show no more item at trailing when children are not full of viewport
                          /// if children is full of viewport, it's the same as fullCrossAxisExtend
                          //  LastChildLayoutType.foot,
                          lastChildLayoutTypeBuilder: (index) {
                            if (index == list.length - 1) {
                              EasyThrottle.throttle('member_dynamics',
                                  const Duration(milliseconds: 1000), () {
                                _memberDynamicController.onLoad();
                              });
                            }
                            return index == list.length
                                ? LastChildLayoutType.foot
                                : LastChildLayoutType.none;
                          },
                          children: [
                            for (var i in list) DynamicPanel(item: i),
                          ]);
                    });
                  } else {
                    return HttpError(
                      errMsg: snapshot.data['msg'],
                      fn: () {
                        setState(() {
                          _memberDynamicController.futureBuilderFuture =
                              _memberDynamicController
                                  .getMemberDynamic('onRefresh');
                        });
                      },
                    );
                  }
                } else {
                  return HttpError(
                    errMsg: 'NULL',
                    fn: () {
                      setState(() {
                        _memberDynamicController.futureBuilderFuture =
                            _memberDynamicController
                                .getMemberDynamic('onRefresh');
                      });
                    },
                  );
                }
              } else {
                return const SliverToBoxAdapter();
              }
            },
          ),
        ],
      );
}