Reorganized and cleaned up the solution.

Include/Database/Transaction.hpp

@@ -0,0 +1,68 @@
+#pragma once
+
+#include <sqlite3.h>
+#include <stdexcept>
+
+class SQLiteTransaction {
+	sqlite3 *m_db = nullptr;
+	bool m_committed = false;
+
+public:
+	explicit SQLiteTransaction( sqlite3 *db )
+		: m_db( db )
+	{
+		if( !m_db )
+			throw std::invalid_argument( "Null SQLite database pointer" );
+
+		if( sqlite3_exec( m_db, "BEGIN TRANSACTION;", nullptr, nullptr, nullptr ) != SQLITE_OK )
+			throw std::runtime_error( "Failed to begin transaction: " + std::string( sqlite3_errmsg( m_db ) ) );
+	}
+
+	~SQLiteTransaction()
+	{
+		if( m_committed || !m_db )
+			return;
+
+		sqlite3_exec( m_db, "ROLLBACK;", nullptr, nullptr, nullptr );
+	}
+
+	SQLiteTransaction( const SQLiteTransaction & ) = delete;
+	SQLiteTransaction &operator=( const SQLiteTransaction & ) = delete;
+
+	SQLiteTransaction( SQLiteTransaction &&other ) noexcept
+		: m_db( other.m_db ), m_committed( other.m_committed )
+	{
+		other.m_db = nullptr;
+	}
+
+	SQLiteTransaction &operator=( SQLiteTransaction &&other ) noexcept
+	{
+		if( this != &other )
+		{
+			rollbackOnError();
+			m_db = other.m_db;
+			m_committed = other.m_committed;
+			other.m_db = nullptr;
+		}
+		return *this;
+	}
+
+	void commit()
+	{
+		if( m_committed || !m_db )
+			return;
+
+		if( sqlite3_exec( m_db, "COMMIT;", nullptr, nullptr, nullptr ) != SQLITE_OK )
+			throw std::runtime_error( "Failed to commit transaction: " + std::string( sqlite3_errmsg( m_db ) ) );
+		m_committed = true;
+	}
+
+private:
+	void rollbackOnError()
+	{
+		if( m_committed || !m_db )
+			return;
+
+		sqlite3_exec( m_db, "ROLLBACK;", nullptr, nullptr, nullptr );
+	}
+};