结构初始化

lib/core/update.dart

@@ -0,0 +1,42 @@
+import 'dart:io';
+
+import 'package:dio/dio.dart';
+import 'package:flutter/material.dart';
+import 'package:toolbox/core/utils.dart';
+import 'package:toolbox/data/provider/app.dart';
+import 'package:toolbox/data/res/build_data.dart';
+import 'package:toolbox/data/service/app.dart';
+import 'package:toolbox/locator.dart';
+
+Future<bool> isFileAvailable(String url) async {
+  try {
+    final resp = await Dio().head(url);
+    return resp.statusCode == 200;
+  } catch (e) {
+    print('update file not available: $e');
+    return false;
+  }
+}
+
+Future<void> doUpdate(BuildContext context, {bool force = false}) async {
+  final update = await locator<AppService>().getUpdate();
+
+  locator<AppProvider>().setNewestBuild(update.newest);
+
+  if (!force && update.newest <= BuildData.build) {
+    print('Update ignored due to current: ${BuildData.build}, '
+        'update: ${update.newest}');
+    return;
+  }
+  print('Update available: ${update.newest}');
+
+  if (Platform.isAndroid && !await isFileAvailable(update.android)) {
+    return;
+  }
+
+  showSnackBarWithAction(
+      context,
+      '${BuildData.name}有更新啦，Ver：${update.newest}\n${update.changelog}',
+      '更新',
+      () => openUrl(Platform.isAndroid ? update.android : update.ios));
+}