obackendfactory.h

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/*
                             This file is part of the Opie Project
                             Copyright (C) Stefan Eilers <eilers.stefan@epost.de>
              =.             Copyright (C) The Opie Team <opie-devel@handhelds.org>
            .=l.
           .>+-=
 _;:,     .>    :=|.         This program is free software; you can
.> <`_,   >  .   <=          redistribute it and/or  modify it under
:`=1 )Y*s>-.--   :           the terms of the GNU Library General Public
.="- .-=="i,     .._         License as published by the Free Software
 - .   .-<_>     .<>         Foundation; either version 2 of the License,
     ._= =}       :          or (at your option) any later version.
    .%`+i>       _;_.
    .i_,=:_.      -<s.       This program 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
..}^=.=       =       ;      Library General Public License for more
++=   -.     .`     .:       details.
 :     =  ...= . :.=-
 -.   .:....=;==+<;          You should have received a copy of the GNU
  -_. . .   )=.  =           Library General Public License along with
    --        :-=`           this library; see the file COPYING.LIB.
                             If not, write to the Free Software Foundation,
                             Inc., 59 Temple Place - Suite 330,
                             Boston, MA 02111-1307, USA.
*/
/*
 * =====================================================================
 * ToDo: Use plugins
 * =====================================================================
 */
#ifndef OPIE_BACKENDFACTORY_H_
#define OPIE_BACKENDFACTORY_H_

/* OPIE */
#include <opie2/opimaccessbackend.h>
#include <opie2/opimglobal.h>
#include <opie2/otodoaccessxml.h>
#include <opie2/otodoaccessvcal.h>
#include <opie2/ocontactaccessbackend_xml.h>
#include <opie2/ocontactaccessbackend_vcard.h>
#include <opie2/odatebookaccessbackend_xml.h>
#include <opie2/odebug.h>

#ifdef __USE_SQL
#include <opie2/otodoaccesssql.h>
#include <opie2/ocontactaccessbackend_sql.h>
#include <opie2/odatebookaccessbackend_sql.h>
#endif

#include <qpe/config.h>

/* QT */
#include <qstring.h>
#include <qasciidict.h>



using namespace Opie;
using namespace Opie::Pim;

namespace Opie {

class OBackendPrivate;

 template<class T>
         class OBackendFactory
         {
         public:
             OBackendFactory() {};

                 static T* create( OPimGlobal::PimType type, OPimGlobal::DatabaseStyle database,
                                   const QString& appName, const QString& filename = QString::null ){
                        owarn << "Selected backend for " << type << " is: " <<
database << oendl;

                        // If we should use the dafult database style, we have to request it
                         OPimGlobal::DatabaseStyle use_database = database;
                         if ( use_database == OPimGlobal::DEFAULT ){
                                 use_database = defaultDB( type );
                         }

                         switch ( type ){
                         case OPimGlobal::TODOLIST:

                                 switch ( use_database ){
                                 default: // Use SQL if something weird is given.
                                         // Fall through !!
                                 case OPimGlobal::SQL:
#ifdef __USE_SQL
                                         return (T*) new OPimTodoAccessBackendSQL( filename );
                                         break;
#else
                                         owarn << "OBackendFactory:: sql Backend for TODO not implemented! Using XML instead!" << oendl;
                                         // Fall through !!
#endif
                                 case OPimGlobal::XML:
                                         return (T*) new OPimTodoAccessXML( appName, filename );
                                         break;
                                 case OPimGlobal::VCARD:
                                         return (T*) new OPimTodoAccessVCal( filename );
                                         break;
                                 }
                         case OPimGlobal::CONTACTLIST:
                                 switch ( use_database ){
                                 default: // Use SQL if something weird is given.
                                         // Fall through !!
                                 case OPimGlobal::SQL:
#ifdef __USE_SQL
                                         return (T*) new OPimContactAccessBackend_SQL( appName, filename );
                                         break;
#else
                                         owarn << "OBackendFactory:: sql Backend for CONTACT not implemented! Using XML instead!" << oendl;
                                         // Fall through !!
#endif
                                 case OPimGlobal::XML:
                                         return (T*) new OPimContactAccessBackend_XML( appName, filename );
                                         break;
                                 case OPimGlobal::VCARD:
                                         return (T*) new OPimContactAccessBackend_VCard( appName, filename );
                                         break;
                                 }
                         case OPimGlobal::DATEBOOK:
                                 switch ( use_database ){
                                 default: // Use SQL if something weird is given.
                                         // Fall through !!
                                 case OPimGlobal::SQL:
#ifdef __USE_SQL
                                         return (T*) new ODateBookAccessBackend_SQL( appName, filename );
                                         break;
#else
                                         owarn << "OBackendFactory:: sql Backend for DATEBOOK not implemented! Using XML instead!" << oendl;
                                         // Fall through !!
#endif
                                 case OPimGlobal::XML:
                                         return (T*) new ODateBookAccessBackend_XML( appName, filename );
                                         break;
                                 case OPimGlobal::VCARD:
                                         owarn << "OBackendFactory:: VCal Backend for DATEBOOK not implemented!" << oendl;
                                         return (T*) NULL;
                                         break;
                                 }
                         default:
                                 return (T*) NULL;
                         }

                 }

                 static OPimGlobal::DatabaseStyle defaultDB( OPimGlobal::PimType type ){
                         QString group_name;
                         switch ( type ){
                         case OPimGlobal::TODOLIST:
                                 group_name = "todo";
                                 break;
                         case OPimGlobal::CONTACTLIST:
                                 group_name = "contact";
                                 break;
                         case OPimGlobal::DATEBOOK:
                                 group_name = "datebook";
                                 break;
                         default:
                                 group_name = "unknown";
                         }

                         Config config( "pimaccess" );
                         config.setGroup ( group_name );
                         QString db_String = config.readEntry( "usebackend", "xml" );

                         QAsciiDict<int> dictDbTypes( OPimGlobal::_END_DatabaseStyle );
                         dictDbTypes.setAutoDelete( TRUE );

                         dictDbTypes.insert( "xml", new int (OPimGlobal::XML) );
                         dictDbTypes.insert( "sql", new int (OPimGlobal::SQL) );
                         dictDbTypes.insert( "vcard", new int (OPimGlobal::VCARD) );

                         int* db_find = dictDbTypes[ db_String ];

                         if ( !db_find )
                                 return OPimGlobal::UNKNOWN;

                         return (OPimGlobal::DatabaseStyle) *db_find;
                 }


                 static T* defaultBackend( OPimGlobal::PimType type, const QString& appName ){
                         return create( type, OPimGlobal::DEFAULT, appName );
                 }
         private:
                 OBackendPrivate* d;

         };

}

#endif

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