PiliPlus/lib/pages/video/detail/reply_reply/view.dart

import 'package:PiliPalaX/http/loading_state.dart';
import 'package:PiliPalaX/pages/video/detail/reply_new/reply_page.dart';
import 'package:easy_debounce/easy_throttle.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:PiliPalaX/common/skeleton/video_reply.dart';
import 'package:PiliPalaX/common/widgets/http_error.dart';
import 'package:PiliPalaX/models/common/reply_type.dart';
import 'package:PiliPalaX/models/video/reply/item.dart';
import 'package:PiliPalaX/pages/video/detail/reply/widgets/reply_item.dart';
import 'package:get/get_navigation/src/dialog/dialog_route.dart';

import '../../../../utils/utils.dart';
import 'controller.dart';

class VideoReplyReplyPanel extends StatefulWidget {
  const VideoReplyReplyPanel({
    this.rcount,
    this.oid,
    this.rpid,
    this.firstFloor,
    this.source,
    this.replyType,
    super.key,
  });
  final dynamic rcount;
  final int? oid;
  final int? rpid;
  final ReplyItemModel? firstFloor;
  final String? source;
  final ReplyType? replyType;

  @override
  State<VideoReplyReplyPanel> createState() => _VideoReplyReplyPanelState();
}

class _VideoReplyReplyPanelState extends State<VideoReplyReplyPanel> {
  late VideoReplyReplyController _videoReplyReplyController;
  late final _savedReplies = {};

  @override
  void initState() {
    super.initState();
    _videoReplyReplyController = Get.put(
      VideoReplyReplyController(
          widget.oid, widget.rpid.toString(), widget.replyType!),
      tag: widget.rpid.toString(),
    );

    // 上拉加载更多
    _videoReplyReplyController.scrollController.addListener(
      () {
        if (_videoReplyReplyController.scrollController.position.pixels >=
            _videoReplyReplyController
                    .scrollController.position.maxScrollExtent -
                300) {
          EasyThrottle.throttle('replylist', const Duration(milliseconds: 200),
              () {
            _videoReplyReplyController.onLoadMore();
          });
        }
      },
    );
  }

  @override
  void dispose() {
    _videoReplyReplyController.scrollController.removeListener(() {});
    Get.delete<VideoReplyReplyController>(tag: widget.rpid.toString());
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      height:
          widget.source == 'videoDetail' ? Utils.getSheetHeight(context) : null,
      color: Theme.of(context).colorScheme.surface,
      child: Column(
        children: [
          if (widget.source == 'videoDetail')
            Container(
              height: 45,
              padding: const EdgeInsets.only(left: 12, right: 2),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: <Widget>[
                  Text('评论详情${widget.rcount > 0 ? '（${widget.rcount}）' : ''}'),
                  IconButton(
                    tooltip: '关闭',
                    icon: const Icon(Icons.close, size: 20),
                    onPressed: Get.back,
                  ),
                ],
              ),
            ),
          Divider(
            height: 1,
            color: Theme.of(context).dividerColor.withOpacity(0.1),
          ),
          Expanded(
            child: RefreshIndicator(
              onRefresh: () async {
                await _videoReplyReplyController.onRefresh();
              },
              child: CustomScrollView(
                controller: _videoReplyReplyController.scrollController,
                physics: const AlwaysScrollableScrollPhysics(),
                slivers: <Widget>[
                  if (widget.firstFloor != null) ...[
                    // const SliverToBoxAdapter(child: SizedBox(height: 10)),
                    SliverToBoxAdapter(
                      child: ReplyItem(
                        replyItem: widget.firstFloor,
                        replyLevel: '2',
                        showReplyRow: false,
                        replyType: widget.replyType,
                        needDivider: false,
                        onReply: () {
                          _onReply(widget.firstFloor);
                        },
                      ),
                    ),
                    SliverToBoxAdapter(
                      child: Divider(
                        height: 20,
                        color: Theme.of(context).dividerColor.withOpacity(0.1),
                        thickness: 6,
                      ),
                    ),
                  ],
                  Obx(() => _buildBody(
                      _videoReplyReplyController.loadingState.value)),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  void _onReply(ReplyItemModel? item) {
    dynamic oid = item?.oid;
    dynamic root = item?.rpid;
    dynamic parent = item?.rpid;
    dynamic key = oid + root + parent;
    Navigator.of(context)
        .push(
      GetDialogRoute(
        pageBuilder: (buildContext, animation, secondaryAnimation) {
          return ReplyPage(
            oid: oid,
            root: root,
            parent: parent,
            replyType: ReplyType.video,
            replyItem: item,
            savedReply: _savedReplies[key],
            onSaveReply: (reply) {
              _savedReplies[key] = reply;
            },
          );
        },
        transitionDuration: const Duration(milliseconds: 500),
        transitionBuilder: (context, animation, secondaryAnimation, child) {
          const begin = Offset(0.0, 1.0);
          const end = Offset.zero;
          const curve = Curves.linear;

          var tween =
              Tween(begin: begin, end: end).chain(CurveTween(curve: curve));

          return SlideTransition(
            position: animation.drive(tween),
            child: child,
          );
        },
      ),
    )
        .then((value) {
      // 完成评论，数据添加
      if (value != null && value['data'] != null) {
        _savedReplies[key] = null;
        List list = _videoReplyReplyController.loadingState.value is Success
            ? (_videoReplyReplyController.loadingState.value as Success)
                .response
            : [];
        list.add(value['data']);
        _videoReplyReplyController.loadingState.value =
            LoadingState.success(list);
      }
    });
  }

  Widget _buildBody(LoadingState loadingState) {
    return loadingState is Success
        ? SliverMainAxisGroup(
            slivers: <Widget>[
              if (widget.firstFloor == null &&
                  _videoReplyReplyController.root != null) ...[
                SliverToBoxAdapter(
                  child: ReplyItem(
                    replyItem: _videoReplyReplyController.root,
                    replyLevel: '2',
                    showReplyRow: false,
                    replyType: widget.replyType,
                    needDivider: false,
                    onReply: () {
                      _onReply(_videoReplyReplyController.root);
                    },
                  ),
                ),
                SliverToBoxAdapter(
                  child: Divider(
                    height: 20,
                    color: Theme.of(context).dividerColor.withOpacity(0.1),
                    thickness: 6,
                  ),
                ),
              ],
              SliverList(
                delegate: SliverChildBuilderDelegate(
                  (BuildContext context, int index) {
                    if (index == loadingState.response.length) {
                      return Container(
                        padding: EdgeInsets.only(
                            bottom: MediaQuery.of(context).padding.bottom),
                        height: MediaQuery.of(context).padding.bottom + 100,
                        child: Center(
                          child: Obx(
                            () => Text(
                              _videoReplyReplyController.noMore.value,
                              style: TextStyle(
                                fontSize: 12,
                                color: Theme.of(context).colorScheme.outline,
                              ),
                            ),
                          ),
                        ),
                      );
                    } else {
                      return ReplyItem(
                        replyItem: loadingState.response[index],
                        replyLevel: '2',
                        showReplyRow: false,
                        replyType: widget.replyType,
                        onReply: () {
                          _onReply(loadingState.response[index]);
                        },
                        onDelete: (rpid, frpid) {
                          List list = (_videoReplyReplyController
                                  .loadingState.value as Success)
                              .response;
                          list =
                              list.where((item) => item.rpid != rpid).toList();
                          _videoReplyReplyController.loadingState.value =
                              LoadingState.success(list);
                        },
                      );
                    }
                  },
                  childCount: loadingState.response.length + 1,
                ),
              ),
            ],
          )
        : loadingState is Error
            ? HttpError(
                errMsg: loadingState.errMsg,
                fn: _videoReplyReplyController.onReload,
              )
            : SliverList(
                delegate: SliverChildBuilderDelegate(
                  (BuildContext context, int index) {
                    return const VideoReplySkeleton();
                  },
                  childCount: 8,
                ),
              );
  }
}