core: create qPrefFacebook from SettingsObjectWrapper

Update set/get functions to follow common name scheme:
- get function have same name as in struct diveComputer
- set function have set_<name>
- signal function have <name>_changed

one class one .h/.cpp is the C++ idiom. Having load/sync of each
variable in 1 functions (in contrast to the distributed way
SettingsObjectWrapper handles it) secures the same storage name
is used. Having the set/get/load/sync functions grouped together
makes it easier to get an overview.

REMARK: this commit only defines the class, it is not active in production

Signed-off-by: Jan Iversen <jani@apache.org>

core/CMakeLists.txt

@@ -104,6 +104,7 @@ set(SUBSURFACE_CORE_LIB_SRCS
 	settings/qPrefCloudStorage.cpp
 	settings/qPrefDisplay.cpp
 	settings/qPrefDiveComputer.cpp
+	settings/qPrefFacebook.cpp
 	settings/qPrefPrivate.cpp
 
 	#Subsurface Qt have the Subsurface structs QObjectified for easy access via QML.

core/settings/qPref.h

@@ -9,6 +9,7 @@
 #include "qPrefCloudStorage.h"
 #include "qPrefDisplay.h"
 #include "qPrefDiveComputer.h"
+#include "qPrefFacebook.h"
 
 class qPref : public QObject {
 	Q_OBJECT

core/settings/qPrefFacebook.cpp

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "qPref.h"
+#include "qPrefPrivate.h"
+
+static const QString group = QStringLiteral("WebApps/Facebook");
+
+qPrefFacebook::qPrefFacebook(QObject *parent) : QObject(parent)
+{
+}
+qPrefFacebook*qPrefFacebook::instance()
+{
+	static qPrefFacebook *self = new qPrefFacebook;
+	return self;
+}
+
+void qPrefFacebook::loadSync(bool doSync)
+{
+	// Empty, because FB probs are not loaded/synced to disk
+}
+
+void qPrefFacebook::set_access_token(const QString &value)
+{
+	if (value != prefs.facebook.access_token) {
+		qPrefPrivate::instance()->copy_txt(&prefs.facebook.access_token, value);
+		emit access_token_changed(value);
+	}
+}
+
+void qPrefFacebook::set_album_id(const QString &value)
+{
+	if (value != prefs.facebook.album_id) {
+		qPrefPrivate::instance()->copy_txt(&prefs.facebook.album_id, value);
+		emit album_id_changed(value);
+	}
+}
+
+void qPrefFacebook::set_user_id(const QString &value)
+{
+	if (value != prefs.facebook.user_id) {
+		qPrefPrivate::instance()->copy_txt(&prefs.facebook.user_id, value);
+		emit access_token_changed(value);
+	}
+}

core/settings/qPrefFacebook.h

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef QPREFSFACEBOOK_H
+#define QPREFSFACEBOOK_H
+#include "core/pref.h"
+
+#include <QObject>
+
+
+class qPrefFacebook : public QObject {
+	Q_OBJECT
+	Q_PROPERTY(QString access_token READ access_token WRITE set_access_token NOTIFY access_token_changed);
+	Q_PROPERTY(QString album_id READ album_id WRITE set_album_id NOTIFY album_id_changed);
+	Q_PROPERTY(QString user_id READ user_id WRITE set_user_id NOTIFY user_id_changed);
+
+public:
+	qPrefFacebook(QObject *parent = NULL);
+	static qPrefFacebook *instance();
+
+	// Load/Sync local settings (disk) and struct preference
+	void loadSync(bool doSync);
+	void inline load() {loadSync(false); }
+	void inline sync() {loadSync(true); }
+
+public:
+	static inline QString access_token() { return prefs.facebook.access_token; }
+	static inline QString album_id() { return prefs.facebook.album_id; }
+	static inline QString user_id() { return prefs.facebook.user_id; }
+
+public slots:
+	void set_access_token(const QString& value);
+	void set_album_id(const QString& value);
+	void set_user_id(const QString& value);
+
+signals:
+	void access_token_changed(const QString& value);
+	void album_id_changed(const QString& value);
+	void user_id_changed(const QString& value);
+
+private:
+	void disk_access_token(bool doSync);
+	void disk_album_id(bool doSync);
+	void disk_user_id(bool doSync);
+};
+
+#endif

core/settings/qPrefPrivate.h

@@ -18,6 +18,7 @@ public:
 	friend class qPrefCloudStorage;
 	friend class qPrefDisplay;
 	friend class qPrefDiveComputer;
+	friend class qPrefFacebook;
 
 private:
 	static qPrefPrivate *instance();

packaging/ios/Subsurface-mobile.pro

@@ -82,6 +82,7 @@ SOURCES += ../../subsurface-mobile-main.cpp \
 	../../core/settings/qPrefCloudStorage.cpp \
 	../../core/settings/qPrefDisplay.cpp \
 	../../core/settings/qPrefDiveComputer.cpp \
+	../../core/settings/qPrefFacebook.cpp \
 	../../core/settings/qPrefPrivate.cpp \
 	../../core/subsurface-qt/CylinderObjectHelper.cpp \
 	../../core/subsurface-qt/DiveObjectHelper.cpp \
@@ -194,6 +195,7 @@ HEADERS += \
 	../../core/settings/qPrefCloudStorage.h \
 	../../core/settings/qPrefDisplay.h \
 	../../core/settings/qPrefDiveComputer.h \
+	../../core/settings/qPrefFacebook.h \
 	../../core/settings/qPrefPrivate.h \
 	../../core/subsurface-qt/CylinderObjectHelper.h \
 	../../core/subsurface-qt/DiveObjectHelper.h \