PiliPlus/lib/pages/live_area_detail/child/view.dart

import 'package:PiliPlus/common/constants.dart';
import 'package:PiliPlus/common/skeleton/video_card_v.dart';
import 'package:PiliPlus/common/widgets/loading_widget/http_error.dart';
import 'package:PiliPlus/common/widgets/refresh_indicator.dart';
import 'package:PiliPlus/http/loading_state.dart';
import 'package:PiliPlus/models/live/live_feed_index/card_data_list_item.dart';
import 'package:PiliPlus/pages/live/widgets/live_item_app.dart';
import 'package:PiliPlus/pages/live_area_detail/child/controller.dart';
import 'package:PiliPlus/utils/grid.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';

class LiveAreaChildPage extends StatefulWidget {
  const LiveAreaChildPage({
    super.key,
    required this.areaId,
    required this.parentAreaId,
  });

  final dynamic areaId;
  final dynamic parentAreaId;

  @override
  State<LiveAreaChildPage> createState() => _LiveAreaChildPageState();
}

class _LiveAreaChildPageState extends State<LiveAreaChildPage>
    with AutomaticKeepAliveClientMixin {
  late final _controller = Get.put(
    LiveAreaChildController(widget.areaId, widget.parentAreaId),
    tag: '${widget.areaId}${widget.parentAreaId}',
  );

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return refreshIndicator(
      onRefresh: _controller.onRefresh,
      child: CustomScrollView(
        slivers: [
          SliverPadding(
            padding: EdgeInsets.only(
              left: StyleString.safeSpace,
              right: StyleString.safeSpace,
              top: StyleString.safeSpace,
              bottom: MediaQuery.paddingOf(context).bottom + 80,
            ),
            sliver: Obx(() => _buildBody(_controller.loadingState.value)),
          ),
        ],
      ),
    );
  }

  Widget _buildBody(LoadingState<List<CardLiveItem>?> loadingState) {
    return switch (loadingState) {
      Loading() => SliverGrid(
          gridDelegate: SliverGridDelegateWithExtentAndRatio(
            mainAxisSpacing: StyleString.cardSpace,
            crossAxisSpacing: StyleString.cardSpace,
            maxCrossAxisExtent: Grid.smallCardWidth,
            childAspectRatio: StyleString.aspectRatio,
            mainAxisExtent: MediaQuery.textScalerOf(context).scale(90),
          ),
          delegate: SliverChildBuilderDelegate(
            (context, index) {
              return const VideoCardVSkeleton();
            },
            childCount: 10,
          ),
        ),
      Success() => loadingState.response?.isNotEmpty == true
          ? SliverGrid(
              gridDelegate: SliverGridDelegateWithExtentAndRatio(
                mainAxisSpacing: StyleString.cardSpace,
                crossAxisSpacing: StyleString.cardSpace,
                maxCrossAxisExtent: Grid.smallCardWidth,
                childAspectRatio: StyleString.aspectRatio,
                mainAxisExtent: MediaQuery.textScalerOf(context).scale(90),
              ),
              delegate: SliverChildBuilderDelegate(
                (context, index) {
                  if (index == loadingState.response!.length - 1) {
                    _controller.onLoadMore();
                  }
                  return LiveCardVApp(item: loadingState.response![index]);
                },
                childCount: loadingState.response!.length,
              ),
            )
          : HttpError(
              onReload: _controller.onReload,
            ),
      Error() => HttpError(
          errMsg: loadingState.errMsg,
          onReload: _controller.onReload,
        ),
    };
  }

  @override
  bool get wantKeepAlive => true;
}