#!/usr/bin/env python

"""
$Id$

This file is part of the sqlmap project, http://sqlmap.sourceforge.net.

Copyright (c) 2006-2008 Bernardo Damele A. G. <bernardo.damele@gmail.com>
                        and Daniele Bellucci <daniele.bellucci@gmail.com>

sqlmap is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation version 2 of the License.

sqlmap is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
details.

You should have received a copy of the GNU General Public License along
with sqlmap; if not, write to the Free Software Foundation, Inc., 51
Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""



from lib.core.data import conf
from lib.core.data import kb
from lib.core.data import logger
from lib.core.settings import MSSQL_ALIASES
from lib.core.settings import MYSQL_ALIASES
from lib.core.settings import ORACLE_ALIASES
from lib.core.settings import PGSQL_ALIASES

from plugins.dbms.mssqlserver import MSSQLServerMap
from plugins.dbms.mysql import MySQLMap
from plugins.dbms.oracle import OracleMap
from plugins.dbms.postgresql import PostgreSQLMap


def setHandler():
    """
    Detect which is the target web application back-end database
    management system.
    """

    count     = 0
    dbmsNames = ( "MySQL", "Oracle", "PostgreSQL", "Microsoft SQL Server" )
    dbmsMap   = (
                  ( MYSQL_ALIASES, MySQLMap ),
                  ( ORACLE_ALIASES, OracleMap ),
                  ( PGSQL_ALIASES, PostgreSQLMap ),
                  ( MSSQL_ALIASES, MSSQLServerMap ),
                )

    for dbmsAliases, dbmsEntry in dbmsMap:
        if conf.dbms and conf.dbms not in dbmsAliases:
            debugMsg  = "skipping to test for %s" % dbmsNames[count]
            logger.debug(debugMsg)
            count += 1
            continue

        dbmsHandler = dbmsEntry()

        if dbmsHandler.checkDbms():
            if not conf.dbms or conf.dbms in dbmsAliases:
                kb.dbmsDetected = True

                return dbmsHandler

    return None