#112 new: check hash during upgrade

lib/data/model/app/shell_func.dart

@@ -75,12 +75,14 @@ esac''');
   }
 }
 
-abstract class _CmdType {
+extension EnumX on Enum {
   /// Find out the required segment from [segments]
-  String find(List<String> segments);
+  String find(List<String> segments) {
+    return segments[index];
+  }
 }
 
-enum StatusCmdType implements _CmdType {
+enum StatusCmdType {
   net,
   sys,
   cpu,
@@ -92,21 +94,11 @@ enum StatusCmdType implements _CmdType {
   tempVal,
   host,
   sysRhel;
-
-  @override
-  String find(List<String> segments) {
-    return segments[index];
-  }
 }
 
-enum DockerCmdType implements _CmdType {
+enum DockerCmdType {
   version,
   ps,
   stats,
   images;
-
-  @override
-  String find(List<String> segments) {
-    return segments[index];
-  }
 }

lib/data/model/app/update.dart

@@ -34,11 +34,13 @@ class AppUpdate {
     required this.changelog,
     required this.build,
     required this.url,
+    required this.sha256,
   });
 
   final AppUpdatePlatformSpecific<String> changelog;
   final Build build;
   final AppUpdatePlatformSpecific<String> url;
+  final AppUpdatePlatformSpecific<String?> sha256;
 
   factory AppUpdate.fromRawJson(String str) =>
       AppUpdate.fromJson(json.decode(str));
@@ -49,12 +51,14 @@ class AppUpdate {
         changelog: AppUpdatePlatformSpecific.fromJson(json["changelog"]),
         build: Build.fromJson(json["build"]),
         url: AppUpdatePlatformSpecific.fromJson(json["url"]),
+        sha256: AppUpdatePlatformSpecific.fromJson(json["sha256"]),
       );
 
   Map<String, dynamic> toJson() => {
         "changelog": changelog.toJson(),
         "build": build.toJson(),
         "url": url.toJson(),
+        "sha256": sha256.toJson(),
       };
 }