Refactor config API

libsrc/db/MetaTable.cpp

@@ -0,0 +1,47 @@
+
+#include <db/MetaTable.h>
+
+// qt
+#include <QDateTime>
+#include <QUuid>
+#include <QNetworkInterface>
+#include <QCryptographicHash>
+
+MetaTable::MetaTable(QObject* parent)
+	: DBManager(parent)
+{
+	setTable("meta");
+	createTable(QStringList()<<"uuid TEXT"<<"created_at TEXT");
+};
+
+QString MetaTable::getUUID() const
+{
+	QVector<QVariantMap> results;
+	getRecords(results, QStringList() << "uuid");
+
+	for(const auto & entry : std::as_const(results))
+	{
+		if(!entry["uuid"].toString().isEmpty())
+		{
+			return entry["uuid"].toString();
+		}
+	}
+
+	// create new uuidv5 based on net adapter MAC, save to db and return
+	QString hash;
+	foreach(QNetworkInterface interface, QNetworkInterface::allInterfaces())
+	{
+		if (!(interface.flags() & QNetworkInterface::IsLoopBack))
+		{
+			hash = QCryptographicHash::hash(interface.hardwareAddress().toLocal8Bit(),QCryptographicHash::Sha1).toHex();
+			break;
+		}
+	}
+	const QString newUuid = QUuid::createUuidV5(QUuid(), hash).toString().mid(1, 36);
+	QVariantMap map;
+	map["created_at"] = QDateTime::currentDateTimeUtc().toString(Qt::ISODate);
+
+	createRecord({{"uuid",newUuid}}, map);
+
+	return newUuid;
+}