add homepage

lib/base/base_state_widget.dart

@@ -0,0 +1,84 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'base_viewmodel.dart';
+
+class BaseStateWidget<T extends BaseViewModel> extends ConsumerStatefulWidget {
+  final Widget Function(BuildContext context, T value, Widget? child) builder;
+  final ProviderBase<T> model;
+  final Widget? child;
+  final Function(T)? onReady;
+
+  const BaseStateWidget({
+    Key? key,
+    required this.builder,
+    required this.model,
+    this.child,
+    this.onReady,
+  }) : super(key: key);
+
+  @override
+  _BaseStateWidgetState<T> createState() => _BaseStateWidgetState<T>();
+}
+
+class _BaseStateWidgetState<T extends BaseViewModel> extends ConsumerState<BaseStateWidget<T>> {
+  @override
+  void initState() {
+    super.initState();
+    if (widget.onReady != null) {
+      widget.onReady!(ref.read<T>(widget.model));
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    var viewModel = ref.watch<T>(widget.model);
+    if (viewModel.currentState == PageState.CONTENT) {
+      return widget.builder(context, viewModel, widget.child);
+    }
+
+    if (viewModel.currentState == PageState.LOADING) {
+      return Container(
+        alignment: Alignment.center,
+        child: const CupertinoActivityIndicator(),
+      );
+    }
+
+    if (viewModel.currentState == PageState.FAILED) {
+      return Container(
+        alignment: Alignment.center,
+        child: Text("请求失败"),
+      );
+    }
+
+    if (viewModel.currentState == PageState.EMPTY) {
+      return Container(
+        alignment: Alignment.center,
+        child: Text("暂无数据"),
+      );
+    }
+
+    return Container();
+  }
+}
+
+abstract class BaseState<T extends StatefulWidget> extends State {
+  late T parent;
+
+  @override
+  void initState() {
+    parent = widget as T;
+    super.initState();
+    WidgetsBinding.instance?.endOfFrame.then((_) {
+      firstFrameCalled();
+    });
+  }
+
+  void firstFrameCalled() {}
+
+  @override
+  Widget build(BuildContext context) {
+    return buildWidgets(context);
+  }
+
+  Widget buildWidgets(BuildContext context);
+}