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

import 'package:PiliPlus/http/loading_state.dart';
import 'package:PiliPlus/models/model_hot_video_item.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:PiliPlus/common/skeleton/video_card_h.dart';
import 'package:PiliPlus/common/widgets/http_error.dart';
import 'package:PiliPlus/common/widgets/video_card_h.dart';
import '../../../../common/constants.dart';
import '../../../../utils/grid.dart';
import './controller.dart';

class RelatedVideoPanel extends StatefulWidget {
  const RelatedVideoPanel({super.key, required this.heroTag});
  final String heroTag;
  @override
  State<RelatedVideoPanel> createState() => _RelatedVideoPanelState();
}

class _RelatedVideoPanelState extends State<RelatedVideoPanel>
    with AutomaticKeepAliveClientMixin {
  late final RelatedController _relatedController =
      Get.put(RelatedController(), tag: widget.heroTag);

  @override
  bool get wantKeepAlive => true;

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return SliverPadding(
      padding: const EdgeInsets.only(top: StyleString.safeSpace - 5),
      sliver: Obx(() => _buildBody(_relatedController.loadingState.value)),
    );
  }

  Widget _buildBody(LoadingState<List<HotVideoItemModel>?> loadingState) {
    return switch (loadingState) {
      Loading() => SliverGrid(
          gridDelegate: Grid.videoCardHDelegate(context),
          delegate: SliverChildBuilderDelegate(
            (context, index) {
              return const VideoCardHSkeleton();
            },
            childCount: 5,
          ),
        ),
      Success() => loadingState.response?.isNotEmpty == true
          ? SliverPadding(
              padding: EdgeInsets.only(
                bottom: MediaQuery.of(context).padding.bottom,
              ),
              sliver: SliverGrid(
                gridDelegate: Grid.videoCardHDelegate(context),
                delegate: SliverChildBuilderDelegate((context, index) {
                  return VideoCardH(
                    videoItem: loadingState.response![index],
                    showPubdate: true,
                  );
                }, childCount: loadingState.response!.length),
              ),
            )
          : const SliverToBoxAdapter(),
      Error() => HttpError(
          errMsg: loadingState.errMsg,
          callback: _relatedController.onReload,
        ),
      LoadingState() => throw UnimplementedError(),
    };
  }
}