Can change security settings

lib/ui/routes/account_settings/account_security_settings.dart

@@ -1,6 +1,8 @@
 import 'package:comunic/helpers/settings_helper.dart';
+import 'package:comunic/models/security_settings.dart';
 import 'package:comunic/ui/dialogs/input_new_password_dialog.dart';
 import 'package:comunic/ui/dialogs/input_user_password_dialog.dart';
+import 'package:comunic/ui/widgets/auto_sized_dialog_content_widget.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
@@ -41,6 +43,12 @@ class __AccountSecuritySettingsScreenBodyState
               title: tr("Change password"),
               onTap: _changePassword,
             ),
+            SettingsTile(
+              title: tr("Change your security questions"),
+              subtitle: tr(
+                  "Your security questions can be used to recover an access to your account when you loose your password..."),
+              onTap: _changeSecurityQuestions,
+            ),
           ],
         )
       ],
@@ -67,4 +75,118 @@ class __AccountSecuritySettingsScreenBodyState
       showSimpleSnack(context, tr("Could not update password!"));
     }
   }
+
+  /// Change security questions
+  void _changeSecurityQuestions() async {
+    try {
+      final password = await showUserPasswordDialog(context);
+
+      if (password == null) return;
+
+      final settings = await SettingsHelper.getSecuritySettings(password);
+
+      final newSettings = await showDialog<SecuritySettings>(
+          context: context,
+          builder: (c) => _SecurityQuestionsDialog(settings: settings));
+
+      if (newSettings == null) return;
+
+      await SettingsHelper.setSecuritySettings(password, newSettings);
+
+      showSimpleSnack(context,
+          tr("You security questions have been successfully updated!"));
+    } catch (e, stack) {
+      print("Could not update security questions!$e\n$stack");
+      showSimpleSnack(context, tr("Could not update security questions!"));
+    }
+  }
+}
+
+class _SecurityQuestionsDialog extends StatefulWidget {
+  final SecuritySettings settings;
+
+  const _SecurityQuestionsDialog({Key key, @required this.settings})
+      : assert(settings != null),
+        super(key: key);
+
+  @override
+  __SecurityQuestionsDialogState createState() =>
+      __SecurityQuestionsDialogState();
+}
+
+class __SecurityQuestionsDialogState extends State<_SecurityQuestionsDialog> {
+  TextEditingController _controllerQuestion1;
+  TextEditingController _controllerAnswer1;
+  TextEditingController _controllerQuestion2;
+  TextEditingController _controllerAnswer2;
+
+  SecuritySettings get _newSettings => SecuritySettings(
+        securityQuestion1: _controllerQuestion1.text,
+        securityAnswer1: _controllerAnswer1.text,
+        securityQuestion2: _controllerQuestion2.text,
+        securityAnswer2: _controllerAnswer2.text,
+      );
+
+  @override
+  void initState() {
+    _controllerQuestion1 =
+        TextEditingController(text: widget.settings.securityQuestion1);
+    _controllerAnswer1 =
+        TextEditingController(text: widget.settings.securityAnswer1);
+    _controllerQuestion2 =
+        TextEditingController(text: widget.settings.securityQuestion2);
+    _controllerAnswer2 =
+        TextEditingController(text: widget.settings.securityAnswer2);
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: Text(tr("Update security questions")),
+      content: AutoSizeDialogContentWidget(child: _buildContent()),
+      actions: <Widget>[
+        MaterialButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: Text(tr("Cancel").toUpperCase()),
+        ),
+        MaterialButton(
+          onPressed: () => Navigator.of(context).pop(_newSettings),
+          child: Text(tr("Update").toUpperCase()),
+        )
+      ],
+    );
+  }
+
+  Widget _buildContent() {
+    return Column(
+      children: <Widget>[
+        Text(tr(
+            "Note: Your two questions and answers MUST be completed in order to be able to recover your account using your security questions!")),
+        _buildTextField(
+            controller: _controllerQuestion1, label: tr("Question 1")),
+        _buildTextField(controller: _controllerAnswer1, label: tr("Answer 1")),
+        _buildTextField(
+            controller: _controllerQuestion2, label: tr("Question 2")),
+        _buildTextField(controller: _controllerAnswer2, label: tr("Answer 2")),
+      ],
+    );
+  }
+
+  Widget _buildTextField({
+    @required TextEditingController controller,
+    @required String label,
+  }) {
+    return TextField(
+      controller: controller,
+      onChanged: (s) => setState(() {}),
+      decoration: InputDecoration(
+        alignLabelWithHint: true,
+        labelText: label,
+        errorText: controller.text.isNotEmpty && controller.text.length < 5
+            ? tr("Unsafe value!")
+            : null,
+      ),
+    );
+  }
 }