#157 new: icloud sync

lib/core/utils/backup.dart

@@ -0,0 +1,78 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+
+import '../../data/model/app/backup.dart';
+import '../../data/res/path.dart';
+import '../../data/store/docker.dart';
+import '../../data/store/private_key.dart';
+import '../../data/store/server.dart';
+import '../../data/store/setting.dart';
+import '../../data/store/snippet.dart';
+import '../../locator.dart';
+
+final _server = locator<ServerStore>();
+final _snippet = locator<SnippetStore>();
+final _privateKey = locator<PrivateKeyStore>();
+final _dockerHosts = locator<DockerStore>();
+final _setting = locator<SettingStore>();
+
+Future<String> get backupPath async => '${await docDir}/srvbox_bak.json';
+
+const backupFormatVersion = 1;
+
+Future<void> backup() async {
+  final result = _diyEncrtpt(
+    json.encode(
+      Backup(
+        version: backupFormatVersion,
+        date: DateTime.now().toString().split('.').first,
+        spis: _server.fetch(),
+        snippets: _snippet.fetch(),
+        keys: _privateKey.fetch(),
+        dockerHosts: _dockerHosts.fetchAll(),
+        settings: _setting.toJson(),
+      ),
+    ),
+  );
+  await File(await backupPath).writeAsString(result);
+}
+
+void restore(Backup backup) {
+  for (final s in backup.snippets) {
+    _snippet.put(s);
+  }
+  for (final s in backup.spis) {
+    _server.put(s);
+  }
+  for (final s in backup.keys) {
+    _privateKey.put(s);
+  }
+  for (final k in backup.dockerHosts.keys) {
+    final val = backup.dockerHosts[k];
+    if (val != null && val is String && val.isNotEmpty) {
+      _dockerHosts.put(k, val);
+    }
+  }
+}
+
+Future<Backup> decodeBackup(String raw) async {
+  return await compute(_decode, raw);
+}
+
+Backup _decode(String raw) {
+  final decrypted = _diyDecrypt(raw);
+  return Backup.fromJson(json.decode(decrypted));
+}
+
+String _diyEncrtpt(String raw) =>
+    json.encode(raw.codeUnits.map((e) => e * 2 + 1).toList(growable: false));
+String _diyDecrypt(String raw) {
+  final list = json.decode(raw);
+  final sb = StringBuffer();
+  for (final e in list) {
+    sb.writeCharCode((e - 1) ~/ 2);
+  }
+  return sb.toString();
+}