Improve editing of connection password

Previously only a new password was saved if the save password checkbox was checked, Which always
started in the unchecked state. Now when editing existing connection the save password checkbox now
reflects if a password has been saved. Only when the password field is edited the program will update
the saved password. If the save password checkbox is unchecked then clear the save password.

pglab/ConnectionConfigurationWidget.cpp

@@ -102,6 +102,7 @@ ConnectionConfigurationWidget::ConnectionConfigurationWidget(
     edtPassword = new QLineEdit;
     SET_OBJECT_NAME(edtPassword);
     edtPassword->setEchoMode(QLineEdit::PasswordEchoOnEdit);
+    connect(edtPassword, &QLineEdit::textEdited, this, &ConnectionConfigurationWidget::passwordEdited);
 
     cbSavePassword = new QCheckBox;
     SET_OBJECT_NAME(cbSavePassword);
@@ -212,6 +213,13 @@ void ConnectionConfigurationWidget::setData(const ConnectionConfig &cfg)
 	edtCrl->setText(cfg.sslCrl());
 
     encodedPassword = cfg.encodedPassword();
+    cbSavePassword->setCheckState(
+        encodedPassword.isEmpty()
+                ? Qt::CheckState::Unchecked
+                : Qt::CheckState::Checked
+    );
+
+    passwordChanged = false;
 }
 
 ConnectionConfig ConnectionConfigurationWidget::data() const
@@ -240,7 +248,12 @@ QString ConnectionConfigurationWidget::group() const
 
 bool ConnectionConfigurationWidget::savePassword() const
 {
-    return cbSavePassword->isChecked() && !edtPassword->text().isEmpty();
+    return cbSavePassword->isChecked() && !edtPassword->text().isEmpty() && passwordChanged;
+}
+
+bool ConnectionConfigurationWidget::clearPassword() const
+{
+    return !cbSavePassword->isChecked();
 }
 
 void ConnectionConfigurationWidget::testConnection()
@@ -278,3 +291,8 @@ void ConnectionConfigurationWidget::handleTestResult(TestConnectionResult result
     cmbDbname->setCurrentText(current);
 }
 
+void ConnectionConfigurationWidget::passwordEdited(const QString &)
+{
+    passwordChanged = true;
+}
+

pglab/ConnectionConfigurationWidget.h

@@ -34,7 +34,9 @@ public:
 	void setData(const ConnectionConfig &cfg);
     ConnectionConfig data() const;
     QString group() const;
+
     bool savePassword() const;
+    bool clearPassword() const;
 
 public slots:
     void testConnection();
@@ -45,6 +47,7 @@ private:
 
 	QUuid m_uuid;
     QByteArray encodedPassword;
+    bool passwordChanged;
 
 	QLabel *lblGroup;
 	QComboBox *cmbbxGroup;
@@ -77,6 +80,7 @@ private:
     QFormLayout *formLayout;
 
     void handleTestResult(TestConnectionResult result);
+    void passwordEdited(const QString &);
 };
 
 #endif // CONNECTIONCONFIGURATIONWIDGET_H

pglab/ConnectionController.cpp

@@ -117,9 +117,10 @@ void ConnectionController::saveConnection(ConnectionConfigurationWidget &w)
 {
     auto cc = w.data();
     auto grp = w.group();
-    if (w.savePassword()) {
+    if (w.savePassword())
         encryptPassword(cc);
-    }
+    if (w.clearPassword())
+        cc.setEncodedPassword({});
     m_connectionTreeModel->save(grp, cc);
 }
 

pglab/ConnectionListModel.cpp

@@ -82,7 +82,11 @@ R"__(INSERT OR REPLACE INTO connection
 		q.bindValue(":sslkey", cc.sslKey());
 		q.bindValue(":sslrootcert", cc.sslRootCert());
 		q.bindValue(":sslcrl", cc.sslCrl());
-		q.bindValue(":password", cc.encodedPassword());
+        auto& encodedPassword = cc.encodedPassword();
+        if (encodedPassword.isEmpty())
+            q.bindValue(":password", QVariant());
+        else
+            q.bindValue(":password", encodedPassword);
 
 		if (!q.exec()) {
 			auto sql_error = q.lastError();