first commit.

client/lib/state.dart

@@ -0,0 +1,23 @@
+import 'package:cloud_archiver/config.dart';
+import 'package:collection/collection.dart';
+import 'package:flutter/foundation.dart';
+import 'package:webdav_client/webdav_client.dart' as dav;
+
+enum DavStatus {
+  notConnected,
+  connected,
+  loading,
+}
+
+extension CloudArchivesSortExt on List<dav.File> {
+  List<dav.File> get sorted => sortedByCompare(
+    (file) => file.name ?? '',
+    (a, b) => b.split('-').last.compareTo(a.split('-').last),
+  );
+}
+
+final ValueNotifier<DavStatus> davStatus = ValueNotifier(DavStatus.notConnected);
+
+final ValueNotifier<Map<String, List<dav.File>>> cloudArchives = ValueNotifier({});
+
+final ValueNotifier<Map<SyncItemConfig, DateTime?>> localSyncItems = ValueNotifier({});