feat: save scheme name logic.

app/lib/models/local_schemes.dart

@@ -2,7 +2,7 @@ import 'package:dde_gesture_manager/models/scheme.dart';
 
 export 'local_schemes_web.dart' if (dart.library.io) 'local_schemes_linux.dart';
 
-abstract class LocalSchemeEntry {
+abstract class LocalSchemeEntry implements Comparable {
   Scheme scheme;
   DateTime lastModifyTime;
   String path;
@@ -25,4 +25,4 @@ abstract class LocalSchemeEntry {
 
 abstract class LocalSchemesInterface<T extends LocalSchemeEntry> {
   Future<List<T>> get schemeEntries;
-}
+}

app/lib/models/local_schemes_linux.dart

@@ -1,3 +1,4 @@
+import 'dart:convert';
 import 'dart:io';
 
 import 'package:dde_gesture_manager/builder/provider_annotation.dart';
@@ -13,7 +14,7 @@ export 'local_schemes.dart';
 @ProviderModel()
 class LocalSchemes implements LocalSchemesInterface<LocalSchemeEntryLinux> {
   LocalSchemes() {
-    schemeEntries.then((value) => schemes = [LocalSchemeEntryLinux.systemDefault(), ...value]);
+    schemeEntries.then((value) => schemes = [LocalSchemeEntryLinux.systemDefault(), ...value..sort()]);
   }
 
   @override
@@ -68,7 +69,13 @@ class LocalSchemeEntryLinux implements LocalSchemeEntry {
 
   @override
   save() {
-    // TODO: implement save
-    throw UnimplementedError();
+    var file = File(path);
+    file.writeAsStringSync(json.encode(scheme));
+  }
+
+  @override
+  int compareTo(other) {
+    assert(other is LocalSchemeEntry);
+    return lastModifyTime.isAfter(other.lastModifyTime) ? -1 : 1;
   }
 }

app/lib/models/local_schemes_web.dart

@@ -12,7 +12,7 @@ export 'local_schemes.dart';
 @ProviderModel()
 class LocalSchemes implements LocalSchemesInterface<LocalSchemeEntryWeb> {
   LocalSchemes() {
-    schemeEntries.then((value) => schemes = [LocalSchemeEntryWeb.systemDefault(), ...value]);
+    schemeEntries.then((value) => schemes = [LocalSchemeEntryWeb.systemDefault(), ...value..sort()]);
   }
 
   @override
@@ -72,4 +72,10 @@ class LocalSchemeEntryWeb implements LocalSchemeEntry {
     // TODO: implement save
     throw UnimplementedError();
   }
+
+  @override
+  int compareTo(other) {
+    assert(other is LocalSchemeEntry);
+    return lastModifyTime.isAfter(other.lastModifyTime) ? -1 : 1;
+  }
 }

app/lib/models/scheme.dart

@@ -128,7 +128,7 @@ class Scheme {
   Scheme.parse(scheme) {
     if (scheme is String) scheme = json.decode(scheme);
     assert(scheme is Map);
-    id = scheme['id'];
+    id = scheme['id'] ?? Uuid().v1();
     name = scheme['name'];
     description = scheme['desc'];
     gestures = (scheme['gestures'] as List? ?? []).map<GestureProp>((ele) => GestureProp.parse(ele)).toList()..sort();
@@ -154,6 +154,13 @@ class Scheme {
     });
     return schemeTree;
   }
+
+  Map toJson() => {
+        'id': id,
+        'name': name,
+        'desc': description,
+        'gestures': gestures,
+      };
 }
 
 enum Gesture {
@@ -221,6 +228,16 @@ class GestureProp implements Comparable {
     return 'GestureProp{gesture: $gesture, direction: $direction, fingers: $fingers, type: $type, command: $command, remark: $remark}';
   }
 
+  Map toJson() => {
+        'id': id,
+        'gesture': H.getGestureName(gesture),
+        'direction': H.getGestureDirectionName(direction),
+        'fingers': fingers,
+        'type': H.getGestureTypeName(type),
+        'command': command,
+        'remark': remark,
+      };
+
   GestureProp.empty() : this.id = Uuid.NAMESPACE_NIL;
 
   GestureProp.parse(props) {