opt: common ctr

opt: state

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

lib/pages/common/common_list_controller.dart

@@ -1,9 +1,73 @@
 import 'package:PiliPlus/http/loading_state.dart';
 import 'package:PiliPlus/pages/common/common_controller.dart';
+import 'package:PiliPlus/utils/extension.dart';
 import 'package:get/get.dart';
 
 abstract class CommonListController<R, T> extends CommonController<R, T> {
+  int page = 1;
+  bool isEnd = false;
+  bool? hasFooter;
+
   @override
   Rx<LoadingState<List<T>?>> loadingState =
       LoadingState<List<T>?>.loading().obs;
+
+  void handleListResponse(List<T> dataList) {}
+
+  List<T>? getDataList(R response) {
+    return response as List<T>?;
+  }
+
+  void checkIsEnd(int length) {}
+
+  @override
+  Future<void> queryData([bool isRefresh = true]) async {
+    if (isLoading || (!isRefresh && isEnd)) return;
+    isLoading = true;
+    LoadingState<R> response = await customGetData();
+    if (response is Success<R>) {
+      if (!customHandleResponse(isRefresh, response)) {
+        List<T>? dataList = getDataList(response.response);
+        if (dataList.isNullOrEmpty) {
+          isEnd = true;
+          if (isRefresh) {
+            loadingState.value = Success(dataList);
+          } else if (hasFooter == true) {
+            loadingState.refresh();
+          }
+          isLoading = false;
+          return;
+        }
+        handleListResponse(dataList!);
+        if (isRefresh) {
+          checkIsEnd(dataList.length);
+          loadingState.value = Success(dataList);
+        } else if (loadingState.value is Success) {
+          final list = loadingState.value.data!..addAll(dataList);
+          checkIsEnd(list.length);
+          loadingState.refresh();
+        }
+      }
+      page++;
+    } else {
+      if (isRefresh &&
+          !handleError(response is Error ? response.errMsg : null)) {
+        loadingState.value = response as LoadingState<List<T>?>;
+      }
+    }
+    isLoading = false;
+  }
+
+  @override
+  Future<void> onRefresh() {
+    page = 1;
+    isEnd = false;
+    return super.onRefresh();
+  }
+
+  @override
+  Future<void> onReload() {
+    loadingState.value = LoadingState<List<T>?>.loading();
+    return super.onReload();
+  }
 }