kgreeter: implement settings save

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>

kgreeter/kcm/CMakeLists.txt

@@ -22,3 +22,15 @@ install(
     FILES kcm_kgreeterconfig.desktop
     DESTINATION ${KDE4_SERVICES_INSTALL_DIR}
 )
+
+########### next target ###############
+
+add_executable(kcmkgreeterhelper kgreeterhelper.cpp)
+target_link_libraries(kcmkgreeterhelper ${KDE4_KDECORE_LIBS})
+
+install(
+    TARGETS kcmkgreeterhelper
+    DESTINATION ${KDE4_LIBEXEC_INSTALL_DIR}
+)
+
+kde4_install_auth_helper_files(kcmkgreeterhelper org.kde.kcontrol.kcmkgreeter root)

kgreeter/kcm/kgreeterconfig.cpp

@@ -23,6 +23,7 @@
 #include <QProcess>
 #include <kdebug.h>
 #include <klocale.h>
+#include <kauthaction.h>
 #include <kimageio.h>
 #include <kstandarddirs.h>
 #include <kmessagebox.h>
@@ -119,6 +120,19 @@ void KCMGreeter::load()
 
 void KCMGreeter::save()
 {
+    KAuth::Action kgreeteraction("org.kde.kcontrol.kcmkgreeter.save");
+    kgreeteraction.setHelperID("org.kde.kcontrol.kcmkgreeter");
+    kgreeteraction.addArgument("style", stylesbox->currentText());
+    kgreeteraction.addArgument("colorscheme", colorsbox->currentText());
+    kgreeteraction.addArgument("background", backgroundrequester->url().path());
+    kgreeteraction.addArgument("rectangle", rectanglerequester->url().path());
+    KAuth::ActionReply kgreeterreply = kgreeteraction.execute();
+
+    // qDebug() << kgreeter.errorCode() << kgreeter.errorDescription();
+
+    if (kgreeterreply != KAuth::ActionReply::SuccessReply) {
+        KMessageBox::error(this, kgreeterreply.errorDescription());
+    }
     emit changed(false);
 }
 

kgreeter/kcm/kgreeterhelper.cpp

@@ -0,0 +1,48 @@
+/*  This file is part of the KDE project
+    Copyright (C) 2022 Ivailo Monev <xakepa10@gmail.com>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License version 2, as published by the Free Software Foundation.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "kgreeterhelper.h"
+
+#include <QSettings>
+#include <kauthhelpersupport.h>
+
+#include "config-kgreeter.h"
+
+ActionReply KGreeterHelper::save(const QVariantMap &parameters)
+{
+    if (!parameters.contains("style") || !parameters.contains("colorscheme")
+        || !parameters.contains("background") || !parameters.contains("rectangle")) {
+        return KAuth::ActionReply::HelperErrorReply;
+    }
+
+    QSettings kgreetersettings(SYSCONF_INSTALL_DIR "/lightdm/lightdm-kgreeter-greeter.conf", QSettings::IniFormat);
+    kgreetersettings.setValue("greeter/style", parameters.value("style"));
+    kgreetersettings.setValue("greeter/colorscheme", parameters.value("colorscheme"));
+    kgreetersettings.setValue("greeter/background", parameters.value("background"));
+    kgreetersettings.setValue("greeter/rectangle", parameters.value("rectangle"));
+    if (kgreetersettings.status() != QSettings::NoError) {
+        KAuth::ActionReply errorreply(KAuth::ActionReply::HelperError);
+        errorreply.setErrorDescription("Could not save settings");
+        errorreply.setErrorCode(1);
+        return errorreply;
+    }
+
+    return KAuth::ActionReply::SuccessReply;
+}
+
+KDE4_AUTH_HELPER_MAIN("org.kde.kcontrol.kcmkgreeter", KGreeterHelper)

kgreeter/kcm/kgreeterhelper.h

@@ -0,0 +1,34 @@
+/*  This file is part of the KDE project
+    Copyright (C) 2022 Ivailo Monev <xakepa10@gmail.com>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License version 2, as published by the Free Software Foundation.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KGREETERHELPER_H
+#define KGREETERHELPER_H
+
+#include <kauthactionreply.h>
+
+// methods return type must be ActionReply otherwise QMetaObject::invokeMethod() fails
+using namespace KAuth;
+
+class KGreeterHelper : public QObject
+{
+    Q_OBJECT
+public slots:
+    ActionReply save(const QVariantMap &parameters);
+};
+
+#endif // KGREETERHELPER_H