feat(Cmake/Database): separate database lib from common (#5334)

* feat(Core/Database): separate databse lib from common

* 1

src/server/database/Database/Transaction.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>
+ * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ */
+
+#ifndef _TRANSACTION_H
+#define _TRANSACTION_H
+
+#include <utility>
+
+#include "SQLOperation.h"
+
+//- Forward declare (don't include header to prevent circular includes)
+class PreparedStatement;
+
+/*! Transactions, high level class. */
+class Transaction
+{
+    friend class TransactionTask;
+    friend class MySQLConnection;
+
+    template <typename T>
+    friend class DatabaseWorkerPool;
+
+public:
+    Transaction()  { }
+    ~Transaction() { Cleanup(); }
+
+    void Append(PreparedStatement* statement);
+    void Append(const char* sql);
+    void PAppend(const char* sql, ...);
+
+    [[nodiscard]] size_t GetSize() const { return m_queries.size(); }
+
+protected:
+    void Cleanup();
+    std::list<SQLElementData> m_queries;
+
+private:
+    bool _cleanedUp{false};
+};
+
+typedef std::shared_ptr<Transaction> SQLTransaction;
+
+/*! Low level class*/
+class TransactionTask : public SQLOperation
+{
+    template <class T> friend class DatabaseWorkerPool;
+    friend class DatabaseWorker;
+
+public:
+    TransactionTask(SQLTransaction trans) : m_trans(std::move(trans)) { } ;
+    ~TransactionTask() override = default;
+
+protected:
+    bool Execute() override;
+
+    SQLTransaction m_trans;
+};
+
+#endif