added OBackendFactory for advanced backend access

4 files changed, 110 insertions, 2 deletions

diff --git a/libopie/pim/obackendfactory.h b/libopie/pim/obackendfactory.h
new file mode 100644
index 0000000..599fbf2
--- a/dev/null
+++ b/libopie/pim/obackendfactory.h
@@ -0,0 +1,88 @@
+/*
+ * Class to manage Backends.
+ *
+ * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
+ *
+ * =====================================================================
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Library General Public
+ *      License as published by the Free Software Foundation;
+ *      either version 2 of the License, or (at your option) any later
+ *      version.
+ * =====================================================================
+ * ToDo: Use plugins 
+ * =====================================================================
+ * Version: $Id$
+ * =====================================================================
+ * History:
+ * $Log$
+ * Revision 1.1  2002/10/07 17:35:01  eilers
+ * added OBackendFactory for advanced backend access
+ *
+ *
+ * =====================================================================
+ */
+#ifndef __OPIE_BACKENDFACTORY_H_
+#define __OPIE_BACKENDFACTORY_H_
+
+#include <qstring.h>
+#include <qasciidict.h>
+#include <qpe/config.h>
+
+#include "otodoaccessxml.h"
+#include "ocontactaccessbackend_xml.h"
+#include "otodoaccesssql.h"
+
+
+template<class T>
+class OBackendFactory
+{
+ public:
+	OBackendFactory() {};
+
+	enum BACKENDS {
+		TODO,
+		CONTACT,
+		DATE
+	};
+	
+	static T* Default( const QString backendName, const QString& appName ){
+	
+
+		Config config( "pimaccess" );
+		config.setGroup ( backendName );
+		QString backend = config.readEntry( "usebackend" );
+
+		QAsciiDict<int> dict ( 3 );
+		dict.setAutoDelete ( TRUE );
+
+		dict.insert( "todo", new int (TODO) );
+		dict.insert( "contact", new int (CONTACT) );
+
+		qWarning ("TODO is: %d", TODO);
+		qWarning ("CONTACT is: %d", CONTACT);
+	
+		switch ( *dict.take( backendName ) ){
+		case TODO:
+			if ( backend == "sql" ) 
+				return (T*) new OTodoAccessBackendSQL("");
+			
+			return (T*) new OTodoAccessXML( appName );
+		case CONTACT:
+			if ( backend == "sql" ) 
+				qWarning ("OBackendFactory:: sql Backend not implemented! Using XML instead!");
+
+			return (T*) new OContactAccessBackend_XML( appName );
+		case DATE:
+			qWarning ("OBackendFactory:: DATE-Backend not implemented!");
+			return NULL;
+		default:
+			return NULL;
+		}
+	
+	
+	}
+};
+
+
+#endif
diff --git a/libopie/pim/ocontactaccess.cpp b/libopie/pim/ocontactaccess.cpp
index 8a8ff08..b5f358b 100644
--- a/libopie/pim/ocontactaccess.cpp
+++ b/libopie/pim/ocontactaccess.cpp
@@ -1,113 +1,119 @@
 /*
  * Class to manage the Contacts.
  *
  * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
  *
  * =====================================================================
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU Library General Public
  *      License as published by the Free Software Foundation; either
  *      version 2 of the License, or (at your option) any later version.
  * =====================================================================
  * Info: This class could just work with a change in the header-file
  *       of the Contact class ! Therefore our libopie only compiles
  *       with our version of libqpe
  * =====================================================================
  * ToDo: XML-Backend: Automatic reload if something was changed...
  *
  *
  * =====================================================================
  * Version: $Id$
  * =====================================================================
  * History:
  * $Log$
+ * Revision 1.3  2002/10/07 17:34:24  eilers
+ * added OBackendFactory for advanced backend access
+ *
  * Revision 1.2  2002/10/02 16:18:11  eilers
  * debugged and seems to work almost perfectly ..
  *
  * Revision 1.1  2002/09/27 17:11:44  eilers
  * Added API for accessing the Contact-Database ! It is compiling, but
  * please do not expect that anything is working !
  * I will debug that stuff in the next time ..
  * Please read README_COMPILE for compiling !
  *
  *
  */
 
 #include "ocontactaccess.h"
+#include "obackendfactory.h"
 
 #include <qasciidict.h>
 #include <qdatetime.h>
 #include <qfile.h>
 #include <qregexp.h>
 #include <qlist.h>
 #include <qcopchannel_qws.h>
 
 //#include <qpe/qcopenvelope_qws.h>
 #include <qpe/global.h>
 
 #include <errno.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
 
 #include "ocontactaccessbackend_xml.h"
 
 
-OContactAccess::OContactAccess ( const QString appname, const QString filename,
+OContactAccess::OContactAccess ( const QString appname, const QString ,
 			 OContactAccessBackend* end, bool autosync ):
 	OPimAccessTemplate<OContact>( end ),
 	m_changed ( false )
 {
         /* take care of the backend. If there is no one defined, we 
 	 * will use the XML-Backend as default (until we have a cute SQL-Backend..).
 	 */
         if( end == 0 ) {
-		end = new OContactAccessBackend_XML( appname, filename );
+		// __asm__("int3");
+		qWarning ("Using BackendFactory !");
+		end = OBackendFactory<OContactAccessBackend>::Default( "contact", appname );
         }
 	// Set backend locally and in template
         m_backEnd = end;
 	OPimAccessTemplate<OContact>::setBackEnd (end);
 	
 
 	/* Connect signal of external db change to function */
 	QCopChannel *dbchannel = new QCopChannel( "QPE/PIM", this );
 	connect( dbchannel, SIGNAL(received(const QCString &, const QByteArray &)),
                this, SLOT(copMessage( const QCString &, const QByteArray &)) );
 	if ( autosync ){
 		QCopChannel *syncchannel = new QCopChannel( "QPE/Sync", this );
 		connect( syncchannel, SIGNAL(received(const QCString &, const QByteArray &)),
 			 this, SLOT(copMessage( const QCString &, const QByteArray &)) );
 	}
 
 
 }
 OContactAccess::~OContactAccess ()
 {
 	/* The user may forget to save the changed database, therefore try to
 	 * do it for him..
 	 */
 	if ( m_changed ) 
 		save();
 	// delete m_backEnd; is done by template..
 }
 
 bool OContactAccess::load()
 {
 	return ( m_backEnd->load() );
 }
 
 bool OContactAccess::save ()
 {
 	/* If the database was changed externally, we could not save the
 	 * Data. This will remove added items which is unacceptable !
 	 * Therefore: Reload database and merge the data...
 	 */
 	if ( m_backEnd->wasChangedExternally() )
 		reload();
 
 	if ( m_changed ){ 
 		bool status = m_backEnd->save();
 		if ( !status ) return false;
 
 		m_changed = false;
 		/* Now tell everyone that new data is available.
diff --git a/libopie/pim/ocontactaccessbackend.h b/libopie/pim/ocontactaccessbackend.h
index 9469bbc..a651477 100644
--- a/libopie/pim/ocontactaccessbackend.h
+++ b/libopie/pim/ocontactaccessbackend.h
@@ -1,70 +1,74 @@
 /**
  * The class responsible for managing a backend.
  * The implementation of this abstract class contains
  * the complete database handling.
  *
  * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
  * Copyright (c) 2002 by Holger Freyther (zecke@handhelds.org)
  *
  * =====================================================================
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU Library General Public
  *      License as published by the Free Software Foundation;
  *      either version 2 of the License, or (at your option) any later
  *      version.
  * =====================================================================
  * ToDo: Define enum for query settings
  * =====================================================================
  * Version: $Id$
  * =====================================================================
  * History:
  * $Log$
+ * Revision 1.2  2002/10/07 17:34:24  eilers
+ * added OBackendFactory for advanced backend access
+ *
  * Revision 1.1  2002/09/27 17:11:44  eilers
  * Added API for accessing the Contact-Database ! It is compiling, but
  * please do not expect that anything is working !
  * I will debug that stuff in the next time ..
  * Please read README_COMPILE for compiling !
  *
  * =====================================================================
  *
  */
 
 #ifndef _OCONTACTACCESSBACKEND_H_
 #define _OCONTACTACCESSBACKEND_H_
 
+#include "ocontact.h"
 #include "opimaccessbackend.h"
 
 class OContactAccessBackend: public OPimAccessBackend<OContact> {
  public:
 	OContactAccessBackend() {}
 	virtual ~OContactAccessBackend() {}
 
 
 	/** Return if database was changed externally.
 	 * This may just make sense on file based databases like a XML-File.
 	 * It is used to prevent to overwrite the current database content
 	 * if the file was already changed by something else !
 	 * If this happens, we have to reload before save our data.
 	 * If we use real databases, this should be handled by the database
 	 * management system themselve, therefore this function should always return false in
 	 * this case. It is not our problem to handle this conflict ...
 	 * @return <i>true</i> if the database was changed and if save without reload will
 	 * be dangerous. <i>false</i> if the database was not changed or it is save to write
 	 * in this situation.
 	 */
 	virtual bool wasChangedExternally() = 0;
 
 	/** Return all possible settings.
 	 *  @return All settings provided by the current backend
 	 * (i.e.: query_WildCards & query_IgnoreCase)
 	 */
 	virtual const uint querySettings() = 0;
 
 	/** Check whether settings are correct.
 	 * @return <i>true</i> if the given settings are correct and possible.
 	 */
 	virtual bool hasQuerySettings (uint querySettings) const = 0;
 
 
 };
 #endif
diff --git a/libopie/pim/ocontactaccessbackend_xml.h b/libopie/pim/ocontactaccessbackend_xml.h
index 2cdb45b..97ef40f 100644
--- a/libopie/pim/ocontactaccessbackend_xml.h
+++ b/libopie/pim/ocontactaccessbackend_xml.h
@@ -1,87 +1,97 @@
 /*
  * XML Backend for the OPIE-Contact Database.
  *
  * Copyright (c) 2002 by Stefan Eilers (Eilers.Stefan@epost.de)
  *
  * =====================================================================
  *	This program is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU Library General Public
  *      License as published by the Free Software Foundation; either
  *      version 2 of the License, or (at your option) any later version.
  * =====================================================================
  * ToDo: XML-Backend: Automatic reload if something was changed...
  *
  *
  * =====================================================================
  * Version: $Id$
  * =====================================================================
  * History:
  * $Log$
+ * Revision 1.2  2002/10/07 17:34:24  eilers
+ * added OBackendFactory for advanced backend access
+ *
  * Revision 1.1  2002/09/27 17:11:44  eilers
  * Added API for accessing the Contact-Database ! It is compiling, but
  * please do not expect that anything is working !
  * I will debug that stuff in the next time ..
  * Please read README_COMPILE for compiling !
  *
  *
  */
 
 #ifndef _OContactAccessBackend_XML_
 #define _OContactAccessBackend_XML_
 
 #include <qasciidict.h>
 #include <qdatetime.h>
 #include <qfile.h>
+#include <qfileinfo.h>
 #include <qregexp.h>
 #include <qarray.h>
 
+#include <qpe/global.h>
+
 #include <opie/xmltree.h>
 #include "ocontactaccessbackend.h"
+#include "ocontactaccess.h"
+
+#include <stdlib.h>
+#include <errno.h>
 
 using namespace Opie;
 
 /* the default xml implementation */
 class OContactAccessBackend_XML : public OContactAccessBackend {
  public:
 	OContactAccessBackend_XML ( QString appname, QString filename = 0l )
 		{
 			m_appName = appname;
 			
 			/* Set journalfile name ... */
 			m_journalName = getenv("HOME");
 			m_journalName +="/.abjournal" + appname;
 			
 			/* Expecting to access the default filename if nothing else is set */
 			if ( filename.isEmpty() ){
 				m_fileName = Global::applicationFileName( "addressbook","addressbook.xml" );
 			} else
 				m_fileName = filename;
 			
 			/* Load Database now */
 			load ();
 		}
 	
 	bool save() {
 		QString strNewFile = m_fileName + ".new";
 		QFile f( strNewFile );
 		if ( !f.open( IO_WriteOnly|IO_Raw ) )
 			return false;
 		
 		int total_written;
 		QString out;
 		out = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE Addressbook ><AddressBook>\n"
 			" <Groups>\n"
 			" </Groups>\n"
 			" <Contacts>\n";
 		//QValueList<Contact>::iterator it;
 		QValueListConstIterator<OContact> it;
 		for ( it = m_contactList.begin(); it != m_contactList.end(); ++it ) {
 			out += "<Contact ";
 			(*it).save( out );
 			out += "/>\n";
 			QCString cstr = out.utf8();
 			total_written = f.writeBlock( cstr.data(), cstr.length() );
 			if ( total_written != int(cstr.length()) ) {
 				f.close();
 				QFile::remove( strNewFile );
 				return false;