opt.: icloud sync (#187)

lib/data/model/app/backup.dart

@@ -20,6 +20,7 @@ class Backup {
   final List<PrivateKeyInfo> keys;
   final Map<String, dynamic> dockerHosts;
   final Map<String, dynamic> settings;
+  final int? lastModTime;
 
   const Backup({
     required this.version,
@@ -29,6 +30,7 @@ class Backup {
     required this.keys,
     required this.dockerHosts,
     required this.settings,
+    this.lastModTime,
   });
 
   Backup.fromJson(Map<String, dynamic> json)
@@ -43,7 +45,8 @@ class Backup {
             .map((e) => PrivateKeyInfo.fromJson(e))
             .toList(),
         dockerHosts = json['dockerHosts'] ?? {},
-        settings = json['settings'] ?? {};
+        settings = json['settings'] ?? {},
+        lastModTime = json['lastModTime'];
 
   Map<String, dynamic> toJson() => {
         'version': version,
@@ -53,6 +56,7 @@ class Backup {
         'keys': keys,
         'dockerHosts': dockerHosts,
         'settings': settings,
+        'lastModTime': lastModTime,
       };
 
   Backup.loadFromStore()
@@ -62,7 +66,8 @@ class Backup {
         snippets = Stores.snippet.fetch(),
         keys = Stores.key.fetch(),
         dockerHosts = Stores.docker.box.toJson(),
-        settings = Stores.setting.box.toJson();
+        settings = Stores.setting.box.toJson(),
+        lastModTime = Stores.lastModTime;
 
   static Future<String> backup() async {
     final result = _diyEncrypt(json.encode(Backup.loadFromStore()));
@@ -71,7 +76,15 @@ class Backup {
     return path;
   }
 
-  Future<void> restore() async {
+  Future<bool?> restore({bool force = false}) async {
+    final curTime = Stores.lastModTime ?? 0;
+    final thisTime = lastModTime ?? 0;
+    if (curTime == thisTime) {
+      return null;
+    }
+    if (curTime > thisTime && !force) {
+      return false;
+    }
     for (final s in settings.keys) {
       Stores.setting.box.put(s, settings[s]);
     }
@@ -90,6 +103,7 @@ class Backup {
         Stores.docker.put(k, val);
       }
     }
+    return true;
   }
 
   Backup.fromJsonString(String raw)

lib/data/res/path.dart

@@ -46,7 +46,9 @@ abstract final class Paths {
     return _fontDir!;
   }
 
-  static Future<String> get bak async => '${await doc}/srvbox_bak.json';
+  static const String bakName = 'srvbox_bak.json';
+
+  static Future<String> get bak async => '${await doc}/$bakName';
 
   static Future<String> get dl async => joinPath(await doc, 'dl');
 }

lib/data/res/store.dart

@@ -23,4 +23,15 @@ abstract final class Stores {
     key,
     snippet,
   ];
+
+  static int? get lastModTime {
+    int? lastModTime = 0;
+    for (final store in all) {
+      final last = store.box.lastModified ?? 0;
+      if (last > (lastModTime ?? 0)) {
+        lastModTime = last;
+      }
+    }
+    return lastModTime;
+  }
 }

lib/data/store/private_key.dart

@@ -13,7 +13,7 @@ class PrivateKeyStore extends PersistentStore {
     final ps = <PrivateKeyInfo>[];
     for (final key in keys) {
       final s = box.get(key);
-      if (s != null) {
+      if (s != null && s is PrivateKeyInfo) {
         ps.add(s);
       }
     }

lib/data/store/server.dart

@@ -13,7 +13,7 @@ class ServerStore extends PersistentStore {
     final List<ServerPrivateInfo> ss = [];
     for (final id in ids) {
       final s = box.get(id);
-      if (s != null) {
+      if (s != null && s is ServerPrivateInfo) {
         ss.add(s);
       }
     }

lib/data/store/snippet.dart

@@ -13,7 +13,7 @@ class SnippetStore extends PersistentStore {
     final ss = <Snippet>[];
     for (final key in keys) {
       final s = box.get(key);
-      if (s != null) {
+      if (s != null && s is Snippet) {
         ss.add(s);
       }
     }