add local/remote file manager

lib/widgets/dialog.dart

@@ -0,0 +1,77 @@
+import 'package:flutter/material.dart';
+import 'package:tuple/tuple.dart';
+import '../common.dart';
+import '../models/model.dart';
+
+void clientClose() {
+  msgBox('', 'Close', 'Are you sure to close the connection?');
+}
+
+void enterPasswordDialog(String id) {
+  final controller = TextEditingController();
+  var remember = FFI.getByName('remember', id) == 'true';
+  if (globalKey.currentContext == null) return;
+  showAlertDialog((setState) => Tuple3(
+    Text(translate('Password Required')),
+    Column(mainAxisSize: MainAxisSize.min, children: [
+      PasswordWidget(controller: controller),
+      CheckboxListTile(
+        contentPadding: const EdgeInsets.all(0),
+        dense: true,
+        controlAffinity: ListTileControlAffinity.leading,
+        title: Text(
+          translate('Remember password'),
+        ),
+        value: remember,
+        onChanged: (v) {
+          if (v != null) {
+            setState(() => remember = v);
+          }
+        },
+      ),
+    ]),
+    [
+      TextButton(
+        style: flatButtonStyle,
+        onPressed: () {
+          DialogManager.reset();
+          Navigator.pop(globalKey.currentContext!);
+        },
+        child: Text(translate('Cancel')),
+      ),
+      TextButton(
+        style: flatButtonStyle,
+        onPressed: () {
+          var text = controller.text.trim();
+          if (text == '') return;
+          FFI.login(text, remember);
+          DialogManager.reset();
+          showLoading(translate('Logging in...'));
+        },
+        child: Text(translate('OK')),
+      ),
+    ],
+  ));
+}
+
+void wrongPasswordDialog(String id) {
+  if (globalKey.currentContext == null) return;
+  showAlertDialog((_) => Tuple3(Text(translate('Wrong Password')),
+      Text(translate('Do you want to enter again?')), [
+        TextButton(
+          style: flatButtonStyle,
+          onPressed: () {
+            DialogManager.reset();
+            Navigator.pop(globalKey.currentContext!);
+          },
+          child: Text(translate('Cancel')),
+        ),
+        TextButton(
+          style: flatButtonStyle,
+          onPressed: () {
+            enterPasswordDialog(id);
+          },
+          child: Text(translate('Retry')),
+        ),
+      ]));
+}