Init snippet page and store

lib/data/model/server/private_key_info.dart

@@ -35,7 +35,7 @@ class PrivateKeyInfo {
   }
 }
 
-List<PrivateKeyInfo>? getPrivateKeyInfoList(dynamic data) {
+List<PrivateKeyInfo> getPrivateKeyInfoList(dynamic data) {
   List<PrivateKeyInfo> ss = [];
   if (data is String) {
     data = json.decode(data);

lib/data/model/server/snippet.dart

@@ -0,0 +1,30 @@
+import 'dart:convert';
+
+class Snippet {
+  late String name;
+  late String script;
+  Snippet(this.name, this.script);
+
+  Snippet.fromJson(Map<String, dynamic> json) {
+    name = json['name'].toString();
+    script = json['script'].toString();
+  }
+  Map<String, dynamic> toJson() {
+    final data = <String, dynamic>{};
+    data['name'] = name;
+    data['script'] = script;
+    return data;
+  }
+}
+
+List<Snippet> getSnippetList(dynamic data) {
+  List<Snippet> ss = [];
+  if (data is String) {
+    data = json.decode(data);
+  }
+  for (var t in data) {
+    ss.add(Snippet.fromJson(t));
+  }
+
+  return ss;
+}

lib/data/store/private_key.dart

@@ -12,7 +12,7 @@ class PrivateKeyStore extends PersistentStore {
 
   List<PrivateKeyInfo> fetch() {
     return getPrivateKeyInfoList(
-        json.decode(box.get('key', defaultValue: '[]')!))!;
+        json.decode(box.get('key', defaultValue: '[]')!));
   }
 
   void delete(PrivateKeyInfo s) {

lib/data/store/snippet.dart

@@ -0,0 +1,33 @@
+import 'dart:convert';
+
+import 'package:toolbox/core/persistant_store.dart';
+import 'package:toolbox/data/model/server/snippet.dart';
+
+class SnippetStore extends PersistentStore {
+  void put(Snippet snippet) {
+    final ss = fetch();
+    if (!have(snippet)) ss.add(snippet);
+    box.put('snippet', json.encode(ss));
+  }
+
+  List<Snippet> fetch() {
+    return getSnippetList(
+        json.decode(box.get('snippet', defaultValue: '[]')!));
+  }
+
+  void delete(Snippet s) {
+    final ss = fetch();
+    ss.removeAt(index(s));
+    box.put('snippet', json.encode(ss));
+  }
+
+  void update(Snippet old, Snippet newInfo) {
+    final ss = fetch();
+    ss[index(old)] = newInfo;
+    box.put('snippet', json.encode(ss));
+  }
+
+  int index(Snippet s) => fetch().indexWhere((e) => e.name == s.name);
+
+  bool have(Snippet s) => index(s) != -1;
+}