android server update password

lib/models/server_model.dart

@@ -142,8 +142,30 @@ class ServerModel with ChangeNotifier {
     await FFI.invokeMethod("init_input");
   }
 
-  getIDPasswd() async {
-    if (_serverId.text != _emptyIdShow && _serverPasswd.text != "") {
+  Future<bool> updatePassword(String pw) async {
+    final oldPasswd = _serverPasswd.text;
+    FFI.setByName("update_password",pw);
+    await Future.delayed(Duration(milliseconds: 500));
+    await getIDPasswd(force: true);
+
+    // check result
+    if(pw == ""){
+      if(_serverPasswd.text.isNotEmpty && _serverPasswd.text!= oldPasswd){
+        return true;
+      }else{
+        return false;
+      }
+    }else{
+      if(_serverPasswd.text == pw){
+        return true;
+      }else{
+        return false;
+      }
+    }
+  }
+
+  getIDPasswd({bool force = false}) async {
+    if (!force && _serverId.text != _emptyIdShow && _serverPasswd.text != "") {
       return;
     }
     var count = 0;

lib/pages/server_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_hbb/models/model.dart';
+import 'package:flutter_hbb/widgets/dialog.dart';
 import 'package:provider/provider.dart';
 
 import '../common.dart';
@@ -16,22 +17,41 @@ class ServerPage extends StatelessWidget implements PageShape {
 
   @override
   final appBarActions = [
-    PopupMenuButton<String>(
-        itemBuilder: (context) {
-          return [
-            PopupMenuItem(
-              child: Text(translate("Change ID")),
-              value: "changeID",
-              enabled: false,
-            ),
-            PopupMenuItem(
-              child: Text(translate("Set your own password")),
-              value: "changePW",
-              enabled: false,
-            )
-          ];
-        },
-        onSelected: (value) => debugPrint("PopupMenuItem onSelected:$value"))
+    PopupMenuButton<String>(itemBuilder: (context) {
+      return [
+        PopupMenuItem(
+          child: Text(translate("Change ID")),
+          value: "changeID",
+          enabled: false,
+        ),
+        PopupMenuItem(
+          child: Text(translate("Set your own password")),
+          value: "changePW",
+          enabled: FFI.serverModel.isStart,
+        ),
+        PopupMenuItem(
+          child: Text(translate("Refresh random password")),
+          value: "refreshPW",
+          enabled: FFI.serverModel.isStart,
+        )
+      ];
+    }, onSelected: (value) {
+      if (value == "changeID") {
+        // TODO
+      } else if (value == "changePW") {
+        updatePasswordDialog();
+      } else if (value == "refreshPW") {
+        () async {
+          showLoading(translate("Waiting"));
+          if(await FFI.serverModel.updatePassword("")){
+            showSuccess();
+          }else{
+            showError();
+          }
+          debugPrint("end updatePassword");
+        }();
+      }
+    })
   ];
 
   @override

lib/widgets/dialog.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_easyloading/flutter_easyloading.dart';
 import '../common.dart';
 import '../models/model.dart';
 
@@ -6,6 +7,103 @@ void clientClose() {
   msgBox('', 'Close', 'Are you sure to close the connection?');
 }
 
+const SEC1 = Duration(seconds: 1);
+void showSuccess({Duration duration = SEC1}){
+  EasyLoading.dismiss();
+  EasyLoading.showSuccess(translate("Successful"),
+      duration: duration,
+      dismissOnTap: true,
+      maskType: EasyLoadingMaskType.black);
+}
+
+void showError({Duration duration = SEC1}){
+  EasyLoading.dismiss();
+  EasyLoading.showError(translate("Error"),
+      duration: duration,
+      dismissOnTap: true,
+      maskType: EasyLoadingMaskType.black);
+}
+
+void updatePasswordDialog(){
+  final p0 = TextEditingController();
+  final p1 = TextEditingController();
+  var validateLength = false;
+  var validateSame = false;
+  DialogManager.show((setState, close) {
+    return CustomAlertDialog(
+      title: Text(translate('Set your own password')),
+      content: Form(
+          autovalidateMode: AutovalidateMode.onUserInteraction,
+          child: Column(mainAxisSize: MainAxisSize.min, children: [
+            TextFormField(
+              autofocus: true,
+              obscureText: true,
+              keyboardType: TextInputType.visiblePassword,
+              decoration: InputDecoration(
+                labelText: translate('Password'),
+              ),
+              controller: p0,
+              validator: (v) {
+                if (v == null) return null;
+                final val = v.trim().length > 5;
+                if (validateLength != val) {
+                  // use delay to make setState success
+                  Future.delayed(Duration(microseconds: 1),
+                          () => setState(() => validateLength = val));
+                }
+                return val
+                    ? null
+                    : translate('Too short, at least 6 characters.');
+              },
+            ),
+            TextFormField(
+              obscureText: true,
+              keyboardType: TextInputType.visiblePassword,
+              decoration: InputDecoration(
+                labelText: translate('Confirmation'),
+              ),
+              controller: p1,
+              validator: (v) {
+                if (v == null) return null;
+                final val = p0.text == v;
+                if (validateSame != val) {
+                  Future.delayed(Duration(microseconds: 1),
+                          () => setState(() => validateSame = val));
+                }
+                return val
+                    ? null
+                    : translate('The confirmation is not identical.');
+              },
+            ),
+          ])),
+      actions: [
+        TextButton(
+          style: flatButtonStyle,
+          onPressed: () {
+            close();
+          },
+          child: Text(translate('Cancel')),
+        ),
+        TextButton(
+          style: flatButtonStyle,
+          onPressed: (validateLength && validateSame)
+              ? () async {
+            close();
+            showLoading(translate("Waiting"));
+            if(await FFI.serverModel.updatePassword(p0.text)){
+              showSuccess();
+            }else{
+              showError();
+            }
+          }
+              : null,
+          child: Text(translate('OK')),
+        ),
+      ],
+    );
+  });
+}
+
 void enterPasswordDialog(String id) {
   final controller = TextEditingController();
   var remember = FFI.getByName('remember', id) == 'true';