second part of PR #578

Signed-off-by: Paulchen-Panther <Paulchen-Panter@protonmail.com>

include/db/MetaTable.h

@@ -0,0 +1,62 @@
+#pragma once
+
+// hyperion
+#include <db/DBManager.h>
+
+// qt
+#include <QDateTime>
+#include <QUuid>
+#include <QNetworkInterface>
+#include <QCryptographicHash>
+
+///
+/// @brief meta table specific database interface
+///
+class MetaTable : public DBManager
+{
+
+public:
+	/// construct wrapper with plugins table and columns
+	MetaTable(QObject* parent = nullptr)
+		: DBManager(parent)
+	{
+		setTable("meta");
+		createTable(QStringList()<<"uuid TEXT"<<"created_at TEXT");
+	};
+	~MetaTable(){};
+
+	///
+	/// @brief Get the uuid, if the uuid is not set it will be created
+	/// @return The uuid
+	///
+	inline const QString getUUID()
+	{
+		QVector<QVariantMap> results;
+		getRecords(results, QStringList() << "uuid");
+
+		for(const auto & entry : 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);
+		VectorPair cond;
+		cond.append(CPair("uuid",newUuid));
+		QVariantMap map;
+		map["created_at"] = QDateTime::currentDateTimeUtc().toString(Qt::ISODate);
+		createRecord(cond, map);
+
+		return newUuid;
+	}
+};