settingsHandler: write default setting for missing keys

LenaPi/controllers/SettingsHandler.cpp

@@ -0,0 +1,70 @@
+#include "SettingsHandler.h"
+
+constexpr const char* const rootPath = "rootPath";
+constexpr const char* const profile = "profile";
+constexpr const char* const enableEnergySaver = "enableEnergySaver";
+constexpr const char* const timeout = "timeout";
+constexpr const char* const shutdownScript = "shutdownScript";
+
+SettingsHandler::SettingsHandler(QObject *parent) : QObject(parent)
+{
+    initDefaults();
+}
+
+SettingsHandler::SettingsHandler(QSettings *settings, QObject *parent) : SettingsHandler(parent)
+{
+    setSettings(settings);
+}
+
+SettingsHandler* SettingsHandler::createSettingsHandlerAndFillWithDefaultsIfMissing(QSettings *settings)
+{
+    const auto handler = new SettingsHandler(settings);
+    handler->fillWithDefaultIfMissing();
+    return handler;
+}
+
+void SettingsHandler::fillWithDefaultIfMissing()
+{
+    for(const auto& key : mDefaults.keys()){
+        if(!mSettings->contains(key)){
+            mSettings->setValue(key,mDefaults.value(key));
+        }
+    }
+}
+
+QString SettingsHandler::getRootPath() const
+{
+    return mSettings->value(rootPath).toString();
+}
+
+QString SettingsHandler::getProfile() const
+{
+    return mSettings->value(profile).toString();
+}
+
+bool SettingsHandler::isEnergySaverEnabled() const
+{
+    return mSettings->value(enableEnergySaver).toBool();
+}
+
+int SettingsHandler::getEnergySaverTimeout() const
+{
+    return mSettings->value(timeout).toInt();
+}
+
+QString SettingsHandler::getShutdownScript() const
+{
+    return mSettings->value(shutdownScript).toString();
+}
+
+void SettingsHandler::initDefaults()
+{
+    mDefaults.insert(rootPath, "/home/ar/source/lenaMusic/");
+    mDefaults.insert(profile, "RasPiTouch");
+    mDefaults.insert(enableEnergySaver, true);
+    mDefaults.insert(timeout, 60);
+    mDefaults.insert(shutdownScript, "/usr/local/sbin/do_shutdown.sh");
+}
+
+
+

LenaPi/controllers/SettingsHandler.h

@@ -0,0 +1,37 @@
+#ifndef SETTINGSHANDLER_H
+#define SETTINGSHANDLER_H
+
+#include <QObject>
+#include <qsettings.h>
+
+/**
+ * @brief Handles app settings
+ */
+class SettingsHandler : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit SettingsHandler(QObject *parent = nullptr);
+    SettingsHandler(QSettings* settings, QObject *parent = nullptr);
+
+    static SettingsHandler* createSettingsHandlerAndFillWithDefaultsIfMissing(QSettings* settings);
+
+    inline void setSettings(QSettings* settings) { mSettings = settings;}
+    inline QSettings* getSettings() const { return mSettings; }
+    void fillWithDefaultIfMissing();
+
+    QString getRootPath() const;
+    QString getProfile() const;
+    bool isEnergySaverEnabled() const;
+    int getEnergySaverTimeout() const;
+    QString getShutdownScript() const;
+
+
+private:
+    void initDefaults();
+    QSettings* mSettings;
+    QHash<QString,QVariant> mDefaults;
+};
+
+#endif // SETTINGSHANDLER_H