refa: query data (#659)

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/live/controller.dart

@@ -1,12 +1,14 @@
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:PiliPlus/http/live.dart';
 import 'package:PiliPlus/models/live/follow.dart';
-import 'package:PiliPlus/pages/common/common_controller.dart';
+import 'package:PiliPlus/models/live/item.dart';
+import 'package:PiliPlus/pages/common/common_list_controller.dart';
 import 'package:PiliPlus/utils/extension.dart';
 import 'package:PiliPlus/utils/storage.dart';
 import 'package:get/get_rx/src/rx_types/rx_types.dart';
 
-class LiveController extends CommonController {
+class LiveController
+    extends CommonListController<List<LiveItemModel>?, LiveItemModel> {
   @override
   void onInit() {
     super.onInit();
@@ -17,7 +19,8 @@ class LiveController extends CommonController {
   }
 
   @override
-  Future<LoadingState> customGetData() => LiveHttp.liveList(pn: currentPage);
+  Future<LoadingState<List<LiveItemModel>?>> customGetData() =>
+      LiveHttp.liveList(pn: currentPage);
 
   @override
   Future onRefresh() {
@@ -41,20 +44,34 @@ class LiveController extends CommonController {
     }
     dynamic res = await LiveHttp.liveFollowing(pn: followPage, ps: 20);
     if (res['status']) {
-      followPage++;
-      liveCount.value = res['data'].liveCount;
-      List list = res['data']
-          .list
-          .where((LiveFollowingItemModel item) =>
+      LiveFollowingModel data = res['data'];
+      liveCount.value = data.liveCount ?? 0;
+      List<LiveFollowingItemModel>? dataList = data.list
+          ?.where((LiveFollowingItemModel item) =>
               item.liveStatus == 1 && item.recordLiveTime == 0)
           .toList();
-      if (isRefresh.not && followListState.value is Success) {
-        list.insertAll(0, (followListState.value as Success).response);
+      if (dataList.isNullOrEmpty) {
+        followEnd = true;
+        if (isRefresh) {
+          followListState.value = LoadingState.success(dataList);
+        }
+        return;
       }
-      followEnd = list.length >= liveCount.value ||
-          list.isEmpty ||
-          (res['data'].list as List?).isNullOrEmpty;
-      followListState.value = LoadingState.success(list);
+      if (isRefresh) {
+        if (dataList!.length >= liveCount.value) {
+          followEnd = true;
+        }
+        followListState.value = LoadingState.success(dataList);
+      } else if (loadingState.value is Success) {
+        List<LiveFollowingItemModel> list =
+            (loadingState.value as Success).response;
+        list.addAll(dataList!);
+        if (list.length >= liveCount.value) {
+          followEnd = true;
+        }
+        loadingState.refresh();
+      }
+      followPage++;
     } else {
       followListState.value = LoadingState.error(res['msg']);
     }

lib/pages/live/view.dart

@@ -3,6 +3,7 @@ import 'package:PiliPlus/common/widgets/network_img_layer.dart';
 import 'package:PiliPlus/common/widgets/refresh_indicator.dart';
 import 'package:PiliPlus/common/widgets/self_sized_horizontal_list.dart';
 import 'package:PiliPlus/http/loading_state.dart';
+import 'package:PiliPlus/models/live/item.dart';
 import 'package:PiliPlus/pages/common/common_page.dart';
 import 'package:PiliPlus/pages/live/controller.dart';
 import 'package:PiliPlus/pages/live/widgets/live_item.dart';
@@ -66,17 +67,7 @@ class _LivePageState extends CommonPageState<LivePage, LiveController>
                 top: StyleString.cardSpace,
                 bottom: MediaQuery.paddingOf(context).bottom + 80,
               ),
-              sliver: Obx(
-                () => controller.loadingState.value is Loading ||
-                        controller.loadingState.value is Success
-                    ? contentGrid(controller.loadingState.value)
-                    : HttpError(
-                        errMsg: controller.loadingState.value is Error
-                            ? (controller.loadingState.value as Error).errMsg
-                            : '没有相关数据',
-                        callback: controller.onReload,
-                      ),
-              ),
+              sliver: Obx(() => _buildBody(controller.loadingState.value)),
             ),
           ],
         ),
@@ -84,33 +75,49 @@ class _LivePageState extends CommonPageState<LivePage, LiveController>
     );
   }
 
-  Widget contentGrid(LoadingState loadingState) {
-    return SliverGrid(
-      gridDelegate: SliverGridDelegateWithExtentAndRatio(
-        // 行间距
-        mainAxisSpacing: StyleString.cardSpace,
-        // 列间距
-        crossAxisSpacing: StyleString.cardSpace,
-        // 最大宽度
-        maxCrossAxisExtent: Grid.smallCardWidth,
-        childAspectRatio: StyleString.aspectRatio,
-        mainAxisExtent: MediaQuery.textScalerOf(context).scale(90),
-      ),
-      delegate: SliverChildBuilderDelegate(
-        (BuildContext context, int index) {
-          if (loadingState is Success &&
-              index == loadingState.response.length - 1) {
-            controller.onLoadMore();
-          }
-          return loadingState is Success
-              ? LiveCardV(
-                  liveItem: loadingState.response[index],
-                )
-              : const VideoCardVSkeleton();
-        },
-        childCount: loadingState is Success ? loadingState.response.length : 10,
-      ),
-    );
+  Widget _buildBody(LoadingState<List<LiveItemModel>?> 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 LiveCardV(liveItem: loadingState.response![index]);
+                },
+                childCount: loadingState.response!.length,
+              ),
+            )
+          : scrollErrorWidget(callback: controller.onReload),
+      Error() => HttpError(
+          errMsg: loadingState.errMsg,
+          callback: controller.onReload,
+        ),
+      _ => throw UnimplementedError(),
+    };
   }
 
   Widget _buildFollowList() {