opt.: more friendly err tip

lib/data/model/app/error.dart

@@ -1,3 +1,5 @@
+import 'package:toolbox/core/extension/context/locale.dart';
+
 enum ErrFrom {
   unknown,
   apt,
@@ -15,18 +17,35 @@ abstract class Err<T> {
   final T type;
   final String? message;
 
+  String? get solution;
+
   Err({required this.from, required this.type, this.message});
 }
 
 enum SSHErrType {
   unknown,
   connect,
-  noPrivateKey;
+  auth,
+  noPrivateKey,
+  chdir,
+  segements,
+  writeScript,
+  getStatus,
+  ;
 }
 
 class SSHErr extends Err<SSHErrType> {
   SSHErr({required super.type, super.message}) : super(from: ErrFrom.ssh);
 
+  @override
+  String? get solution => switch (type) {
+        SSHErrType.chdir => l10n.needHomeDir,
+        SSHErrType.auth => l10n.authFailTip,
+        SSHErrType.writeScript => l10n.writeScriptFailTip,
+        SSHErrType.noPrivateKey => l10n.noPrivateKeyTip,
+        _ => null,
+      };
+
   @override
   String toString() {
     return 'SSHErr<$type>: $message';
@@ -49,6 +68,9 @@ class ContainerErr extends Err<ContainerErrType> {
   ContainerErr({required super.type, super.message})
       : super(from: ErrFrom.docker);
 
+  @override
+  String? get solution => null;
+
   @override
   String toString() {
     return 'ContainerErr<$type>: $message';
@@ -64,6 +86,9 @@ enum ICloudErrType {
 class ICloudErr extends Err<ICloudErrType> {
   ICloudErr({required super.type, super.message}) : super(from: ErrFrom.icloud);
 
+  @override
+  String? get solution => null;
+
   @override
   String toString() {
     return 'ICloudErr<$type>: $message';
@@ -79,6 +104,9 @@ enum WebdavErrType {
 class WebdavErr extends Err<WebdavErrType> {
   WebdavErr({required super.type, super.message}) : super(from: ErrFrom.webdav);
 
+  @override
+  String? get solution => null;
+
   @override
   String toString() {
     return 'WebdavErr<$type>: $message';
@@ -95,6 +123,9 @@ enum PveErrType {
 class PveErr extends Err<PveErrType> {
   PveErr({required super.type, super.message}) : super(from: ErrFrom.status);
 
+  @override
+  String? get solution => null;
+
   @override
   String toString() {
     return 'PveErr<$type>: $message';

lib/data/model/server/server.dart

@@ -1,6 +1,7 @@
 import 'package:dartssh2/dartssh2.dart';
 import 'package:toolbox/core/extension/context/locale.dart';
 import 'package:toolbox/core/extension/listx.dart';
+import 'package:toolbox/data/model/app/error.dart';
 import 'package:toolbox/data/model/app/shell_func.dart';
 import 'package:toolbox/data/model/server/battery.dart';
 import 'package:toolbox/data/model/server/conn.dart';
@@ -55,7 +56,7 @@ class ServerStatus {
   NetSpeed netSpeed;
   Temperatures temps;
   SystemType system;
-  String? err;
+  Err? err;
   DiskIO diskIO;
   List<NvidiaSmiItem>? nvidia;
   final List<Battery> batteries = [];

lib/data/model/server/server.ext.dart

@@ -53,7 +53,7 @@ extension ServerX on Server {
       case ServerConn.connecting:
         return l10n.serverTabConnecting;
       case ServerConn.failed:
-        return status.err ?? l10n.serverTabFailed;
+        return status.err != null ? l10n.viewErr : l10n.serverTabFailed;
     }
   }
 }

lib/data/provider/server.dart

@@ -8,6 +8,7 @@ import 'package:toolbox/core/extension/ssh_client.dart';
 import 'package:toolbox/core/extension/stringx.dart';
 import 'package:toolbox/core/utils/ssh_auth.dart';
 import 'package:toolbox/core/utils/platform/path.dart';
+import 'package:toolbox/data/model/app/error.dart';
 import 'package:toolbox/data/model/app/shell_func.dart';
 import 'package:toolbox/data/model/server/system.dart';
 import 'package:toolbox/data/model/sftp/req.dart';
@@ -290,7 +291,7 @@ class ServerProvider extends ChangeNotifier {
         }
       } catch (e) {
         TryLimiter.inc(sid);
-        s.status.err = e.toString();
+        s.status.err = SSHErr(type: SSHErrType.connect, message: e.toString());
         _setServerState(s, ServerConn.failed);
 
         /// In order to keep privacy, print [spi.name] instead of [spi.id]
@@ -313,12 +314,12 @@ class ServerProvider extends ChangeNotifier {
         );
       } on SSHAuthAbortError catch (e) {
         TryLimiter.inc(sid);
-        s.status.err = e.toString();
+        s.status.err = SSHErr(type: SSHErrType.auth, message: e.toString());
         _setServerState(s, ServerConn.failed);
         return;
       } on SSHAuthFailError catch (e) {
         TryLimiter.inc(sid);
-        s.status.err = e.toString();
+        s.status.err = SSHErr(type: SSHErrType.auth, message: e.toString());
         _setServerState(s, ServerConn.failed);
         return;
       } catch (e) {
@@ -344,11 +345,14 @@ class ServerProvider extends ChangeNotifier {
           if (err != null) {
             throw err;
           }
-        } catch (e) {
+        } catch (ee) {
           TryLimiter.inc(sid);
-          s.status.err = e.toString();
+          s.status.err = SSHErr(
+            type: SSHErrType.writeScript,
+            message: '$e\n\n$ee',
+          );
           _setServerState(s, ServerConn.failed);
-          Loggers.app.warning('Write script to ${spi.name} by sftp', e);
+          Loggers.app.warning('Write script to ${spi.name} by sftp', ee);
           return;
         } finally {
           if (await file.exists()) await file.delete();
@@ -379,13 +383,16 @@ class ServerProvider extends ChangeNotifier {
           }
         }
         TryLimiter.inc(sid);
-        s.status.err = 'Seperate segments failed, raw:\n$raw';
+        s.status.err = SSHErr(
+          type: SSHErrType.segements,
+          message: 'Seperate segments failed, raw:\n$raw',
+        );
         _setServerState(s, ServerConn.failed);
         return;
       }
     } catch (e) {
       TryLimiter.inc(sid);
-      s.status.err = e.toString();
+      s.status.err = SSHErr(type: SSHErrType.getStatus, message: e.toString());
       _setServerState(s, ServerConn.failed);
       Loggers.app.warning('Get status from ${spi.name} failed', e);
       return;
@@ -395,10 +402,17 @@ class ServerProvider extends ChangeNotifier {
     final customCmdLen = spi.custom?.cmds?.length ?? 0;
     if (!systemType.isSegmentsLenMatch(segments.length - customCmdLen)) {
       TryLimiter.inc(sid);
+      if (raw.contains('Could not chdir to home directory /var/services/')) {
+        s.status.err = SSHErr(type: SSHErrType.chdir, message: raw);
+        _setServerState(s, ServerConn.failed);
+        return;
+      }
       final expected = systemType.segmentsLen;
       final actual = segments.length;
-      final err = 'Segments: expect $expected, got $actual, raw:\n\n$raw';
-      s.status.err = err;
+      s.status.err = SSHErr(
+        type: SSHErrType.segements,
+        message: 'Segments: expect $expected, got $actual, raw:\n\n$raw',
+      );
       _setServerState(s, ServerConn.failed);
       return;
     }
@@ -418,7 +432,10 @@ class ServerProvider extends ChangeNotifier {
       );
     } catch (e, trace) {
       TryLimiter.inc(sid);
-      s.status.err = 'Parse failed: $e\n\n$raw';
+      s.status.err = SSHErr(
+        type: SSHErrType.getStatus,
+        message: 'Parse failed: $e\n\n$raw',
+      );
       _setServerState(s, ServerConn.failed);
       Loggers.parse.warning('Server status', e, trace);
       return;