/**
 * @file    CSQLiteTransaction.cpp
 * @ingroup SQLiteCpp
 * @brief   A CSQLiteTransaction is way to group multiple SQL statements into an atomic secured operation.
 *
 * Copyright (c) 2012-2013 Sebastien Rombauts (sebastien.rombauts@gmail.com)
 *
 * Distributed under the MIT License (MIT) (See accompanying file LICENSE.txt
 * or copy at http://opensource.org/licenses/MIT)
 */
#include "pch.h"
#include "CSQLite/CSQLiteTransaction.h"

#include "CSQLite/CSQLiteDB.h"

// Begins the SQLite CSQLiteTransaction
CSQLiteTransaction::CSQLiteTransaction(CSQLiteDB & aDatabase, bool startnow) :
    mDatabase(aDatabase),
    mbCommited(false)
{
	if(startnow)
	{
        mDatabase.exec("BEGIN");
        mbCommited = false;
	}else{
        mbCommited = true;
	}
}

// Safely rollback the CSQLiteTransaction if it has not been committed.
CSQLiteTransaction::~CSQLiteTransaction()
{
    if (false == mbCommited)
    {
        try
        {
            mDatabase.exec("ROLLBACK");
        }
        catch (CSQLiteException&)
        {
            // Never throw an exception in a destructor: error if already rollbacked, but no harm is caused by this.
        }
    }
}

// Commit the CSQLiteTransaction.
void CSQLiteTransaction::commit()
{
    if (false == mbCommited)
    {
        mDatabase.exec("COMMIT");
        mbCommited = true;
    }
    else
    {
        throw CSQLiteException("CSQLiteTransaction already commited.");
    }
}