Added some docu to the interface and now using the cache infrastucture by zecke.. :)

4 files changed, 55 insertions, 93 deletions

diff --git a/libopie/pim/ocontactaccess.cpp b/libopie/pim/ocontactaccess.cpp
index e8c0a45..2ca0283 100644
--- a/libopie/pim/ocontactaccess.cpp
+++ b/libopie/pim/ocontactaccess.cpp
@@ -8,32 +8,35 @@
          *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 1.5  2002/10/16 10:52:40  eilers
+ * Added some docu to the interface and now using the cache infrastucture by zecke.. :)
+ *
  * Revision 1.4  2002/10/14 16:21:54  eilers
  * Some minor interface updates
  *
  * 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 !
  *
  *
@@ -49,140 +52,102 @@
 #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 ,
                          OContactAccessBackend* end, bool autosync ):
-        OPimAccessTemplate<OContact>( end ),
-        m_changed ( false )
+        OPimAccessTemplate<OContact>( end )
 {
         /* 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 ) {
                 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();
+        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() )
+        if ( OPimAccessTemplate<OContact>::wasChangedExternally() )
                 reload();
 
-        if ( m_changed ){ 
-                bool status = m_backEnd->save();
-                if ( !status ) return false;
+        bool status = OPimAccessTemplate<OContact>::save();
+        if ( !status ) return false;
 
-                m_changed = false;
-                /* Now tell everyone that new data is available.
-                 */
-                QCopEnvelope e( "QPE/PIM", "addressbookUpdated()" );
-
-        }
+        /* Now tell everyone that new data is available.
+         */
+        QCopEnvelope e( "QPE/PIM", "addressbookUpdated()" );
 
         return true;
 }
 
 const uint OContactAccess::querySettings()
 {
         return ( m_backEnd->querySettings() );
 }
 
 bool OContactAccess::hasQuerySettings ( int querySettings ) const
 {
         return ( m_backEnd->hasQuerySettings ( querySettings ) );
 }
 
-bool OContactAccess::add ( const OContact& newcontact )
-{
-        m_changed = true;
-        return ( m_backEnd->add ( newcontact ) );
-}
-
-bool OContactAccess::replace ( const OContact& contact )
-{
-        m_changed = true;
-        return ( m_backEnd->replace ( contact ) );
-}
-
-bool OContactAccess::remove ( const OContact& t )
-{
-        m_changed = true;
-        return ( m_backEnd->remove ( t.uid() ) );
-}
-
-bool OContactAccess::remove ( int uid )
-{
-        m_changed = true;
-        return ( m_backEnd->remove ( uid ) );
-}
 
 bool OContactAccess::wasChangedExternally()const
 {
         return ( m_backEnd->wasChangedExternally() );
 }
 
 
-bool OContactAccess::reload()
-{
-        return ( m_backEnd->reload() );
-}
-
 void OContactAccess::copMessage( const QCString &msg, const QByteArray & )
 {
         if ( msg == "addressbookUpdated()" ){
                 qWarning ("OContactAccess: Received addressbokUpdated()");
                 emit signalChanged ( this );
         } else if ( msg == "flush()" ) {
                 qWarning ("OContactAccess: Received flush()");
                 save ();
         } else if ( msg == "reload()" ) {
                 qWarning ("OContactAccess: Received reload()");
                 reload ();
                 emit signalChanged ( this );
         }
 }
diff --git a/libopie/pim/ocontactaccess.h b/libopie/pim/ocontactaccess.h
index adc66cf..da9c942 100644
--- a/libopie/pim/ocontactaccess.h
+++ b/libopie/pim/ocontactaccess.h
@@ -4,32 +4,35 @@
  * 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 1.3  2002/10/16 10:52:40  eilers
+ * Added some docu to the interface and now using the cache infrastucture by zecke.. :)
+ *
  * Revision 1.2  2002/10/14 16:21:54  eilers
  * Some minor interface updates
  *
  * 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 _OCONTACTACCESS_H
 #define _OCONTACTACCESS_H
 
 #include <qobject.h>
 
@@ -78,91 +81,51 @@ class OContactAccess: public QObject, public OPimAccessTemplate<OContact>
                 IgnoreCase = 0x0002,
                 RegExp     = 0x0004,
                 ExactMatch = 0x0008,
         };
 
         /** Return all possible settings.
          *  @return All settings provided by the current backend
          * (i.e.: query_WildCards & query_IgnoreCase)
          */
         const uint querySettings();
 
         /** Check whether settings are correct.
          * @return <i>true</i> if the given settings are correct and possible.
          */
         bool hasQuerySettings ( int querySettings ) const;
 
-        /** Add Contact to database.
-         * @param newcontact The contact to add.
-         * @return <i>true</i> if added successfully.
-         */
-        bool add (const OContact& newcontact);
-
-        /** Replace contact.
-         * Replaces given contact with contact with the user id <i>uid</i>.
-         * @param uid The user ID
-         * @param contact The new contact
-         * @return <i>true</i> if successful.
-         */
-        bool replace ( const OContact& contact );
-
-        /** Remove contact.
-         * Removes contact with the user id <i>uid</i>.
-         * @param The contact to remove
-         * @return <i>true</i> if successful.
-         */
-        bool remove ( const OContact& t );
-
-        /** Remove contact.
-         * Removes contact with the user id <i>uid</i>.
-         * @param The user id of the contact to remove
-         * @return <i>true</i> if successful.
-         */
-        bool remove ( int uid );
-
-        /** Load Database *
-         */
-        bool load();
-        
         /**
          * if the resource was changed externally.
          * You should use the signal instead of polling possible changes !
          */
         bool wasChangedExternally()const;
 
-        /** Reload database.
-         * You should execute this function if the external database
-         * was changed.
-         * This function will load the external database and afterwards
-         * rejoin the local changes. Therefore the local database will be set consistent.
-         */
-        bool reload();
 
         /** Save contacts database.
          * Save is more a "commit". After calling this function, all changes are public available.
          * @return true if successful
          */
         bool save();
 
  signals:
         /* Signal is emitted if the database was changed. Therefore
          * we may need to reload to stay consistent.
          * @param which Pointer to the database who created this event. This pointer
          * is useful if an application has to handle multiple databases at the same time.
          * @see reload()
          */
         void signalChanged ( const OContactAccess *which );
 
 
  private:
         // class OContactAccessPrivate;
         // OContactAccessPrivate* d;
         OContactAccessBackend *m_backEnd;
         bool m_loading:1;
-        bool m_changed;
 
  private slots:
         void copMessage( const QCString &msg, const QByteArray &data );
 
 
 };
 #endif
diff --git a/libopie/pim/ocontactaccessbackend_xml.h b/libopie/pim/ocontactaccessbackend_xml.h
index 50ea329..12a75ba 100644
--- a/libopie/pim/ocontactaccessbackend_xml.h
+++ b/libopie/pim/ocontactaccessbackend_xml.h
@@ -4,32 +4,35 @@
  * 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 1.4  2002/10/16 10:52:40  eilers
+ * Added some docu to the interface and now using the cache infrastucture by zecke.. :)
+ *
  * Revision 1.3  2002/10/14 16:21:54  eilers
  * Some minor interface updates
  *
  * 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_
@@ -43,51 +46,56 @@
 #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 )
+        OContactAccessBackend_XML ( QString appname, QString filename = 0l ):
+                m_changed( false )
                 {
                         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() {
+
+                if ( !m_changed )
+                        return true;
+
                 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 );
@@ -110,54 +118,57 @@ class OContactAccessBackend_XML : public OContactAccessBackend {
                         QFile::remove( strNewFile );
                         return false;
                 }
                 f.close();
                 
                 // move the file over, I'm just going to use the system call
                 // because, I don't feel like using QDir.
                 if ( ::rename( strNewFile.latin1(), m_fileName.latin1() ) < 0 ) {
                         qWarning( "problem renaming file %s to %s, errno: %d",
                                   strNewFile.latin1(), m_journalName.latin1(), errno );
                         // remove the tmp file...
                         QFile::remove( strNewFile );
                 }
                 
                 /* The journalfile should be removed now... */
                 removeJournal();
+
+                m_changed = false;
                 return true;
         }
         
         bool load () {
                 m_contactList.clear();
                 
                 /* Load XML-File and journal if it exists */
                 if ( !load ( m_fileName, false ) )
                         return false;
                 /* The returncode of the journalfile is ignored due to the
                  * fact that it does not exist when this class is instantiated !
                  * But there may such a file exist, if the application crashed.
                  * Therefore we try to load it to get the changes before the #
                  * crash happened...
                  */
                 load (m_journalName, true);
                 
                 return true;
         }
 
         void clear () {
                 m_contactList.clear();
+                m_changed = false;
 
         }
         
         bool wasChangedExternally()
                 {
                         QFileInfo fi( m_fileName );
                         
                         QDateTime lastmod = fi.lastModified ();
                         
                         return (lastmod != m_readtime);
                 }
         
         QArray<int> allRecords() const {
                 QArray<int> uid_list( m_contactList.count() );
                 
                 uint counter = 0; 
@@ -262,57 +273,64 @@ class OContactAccessBackend_XML : public OContactAccessBackend {
                         case OContactAccess::RegExp:
                                 return ( true );
                         case OContactAccess::WildCards:
                                 return ( true );
                         case OContactAccess::ExactMatch:
                                 return ( true );
                         default:
                                 return ( false );
                         }
                 }
         
         bool add ( const OContact &newcontact )
                 {
                         //qWarning("odefaultbackend: ACTION::ADD");
                         updateJournal (newcontact, OContact::ACTION_ADD);
                         addContact_p( newcontact );
+                        
+                        m_changed = true;
+
                         return true;
                 }
         
         bool replace ( const OContact &contact )
                 {
+                        m_changed = true;
+
                         bool found = false;
                         
                         QValueListIterator<OContact> it;
                         for( it = m_contactList.begin(); it != m_contactList.end(); ++it ){
                                 if ( (*it).uid() == contact.uid() ){
                                         found = true;
                                         break;
                                 }
                         }
                         if (found) {
                                 updateJournal (contact, OContact::ACTION_REPLACE);
                                 m_contactList.remove (it);
                                 m_contactList.append (contact);
                                 return true;
                         } else
                                 return false;
                 }
         
         bool remove ( int uid )
                 {
+                        m_changed = true;
+
                         bool found = false;
                         QValueListIterator<OContact> it;
                         for( it = m_contactList.begin(); it != m_contactList.end(); ++it ){
                                 if ((*it).uid() == uid){
                                         found = true;
                                         break;
                                 }
                         }
                         if (found) {
                                 updateJournal ( *it, OContact::ACTION_REMOVE);
                                 m_contactList.remove (it);
                                 return true;
                         } else
                                 return false;
                 }
         
@@ -540,24 +558,25 @@ class OContactAccessBackend_XML : public OContactAccessBackend {
                 buf = "<Contact ";
                 cnt.save( buf );
                 buf += " action=\"" + QString::number( (int)action ) + "\" ";
                 buf += "/>\n";
                 QCString cstr = buf.utf8();
                 f.writeBlock( cstr.data(), cstr.length() );
         }
         
         void removeJournal()
                 {
                         QFile f ( m_journalName );
                         if ( f.exists() )
                                 f.remove();
                 }
         
  protected:
+        bool m_changed;
         QString m_journalName;
         QString m_fileName;
         QString m_appName;
         QValueList<OContact> m_contactList;
         QDateTime m_readtime;
 };
 
 #endif
diff --git a/libopie/pim/opimaccesstemplate.h b/libopie/pim/opimaccesstemplate.h
index 3e1f393..50cb1e4 100644
--- a/libopie/pim/opimaccesstemplate.h
+++ b/libopie/pim/opimaccesstemplate.h
@@ -24,94 +24,108 @@ class OPimAccessTemplate : public OTemplateBase<T> {
 public:
     typedef ORecordList<T> List;
     typedef OPimAccessBackend<T> BackEnd;
     typedef OPimCache<T> Cache;
 
     /**
      * c'tor BackEnd
      */
     OPimAccessTemplate( BackEnd* end);
     virtual ~OPimAccessTemplate();
 
     /**
      * load from the backend
      */
     virtual bool load();
 
-    /**
-     * reload from the backend
+    /** Reload database.
+     * You should execute this function if the external database
+     * was changed.
+     * This function will load the external database and afterwards
+     * rejoin the local changes. Therefore the local database will be set consistent.
      */
     virtual bool reload();
 
-    /**
-     * save to the backend
+    /** Save contacts database.
+     * Save is more a "commit". After calling this function, all changes are public available.
+     * @return true if successful
      */
     virtual bool save();
 
     /**
      * if the resource was changed externally
+     * You should use the signal handling instead of polling possible changes !
+     * zecke: Do you implement a signal for otodoaccess ?
      */
     bool wasChangedExternally()const;
 
     /**
      * return a List of records
      * you can iterate over them
      */
     virtual List allRecords()const;
 
     /**
-     * queryByExample)
+     * queryByExample. 
      * @see otodoaccess, ocontactaccess
      */
     virtual List queryByExample( const T& t, int querySettings );
 
     /**
      * find the OPimRecord uid
      */
     virtual T find( int uid )const;
 
     /**
      * read ahead cache find method ;)
      */
     virtual T find( int uid, const QArray<int>&,
                     uint current, CacheDirection dir = Forward )const;
 
     /* invalidate cache here */
     /**
      * clears the backend and invalidates the backend
      */
     virtual void clear() ;
 
     /**
      * add T to the backend
+     * @param t The item to add.
+     * @return <i>true</i> if added successfully.
      */
     virtual bool add( const T& t ) ;
 
     /* only the uid matters */
     /**
      * remove T from the backend
+     * @param t The item to remove
+     * @return <i>true</i> if successful.
      */
     virtual bool remove( const T& t );
 
     /**
      * remove the OPimRecord with uid
+     * @param uid The ID of the item to remove
+     * @return <i>true</i> if successful.
      */
     virtual bool remove( int uid );
 
     /**
      * replace T from backend
+     * @param t The item to replace
+     * @return <i>true</i> if successful.
      */
     virtual bool replace( const T& t) ;
 
     /**
      * @internal
      */
     void cache( const T& )const;
     void setSaneCacheSize( int );
 protected:
     /**
      * invalidate the cache
      */
     void invalidateCache();
 
     void setBackEnd( BackEnd* end );
     /**
@@ -129,33 +143,34 @@ OPimAccessTemplate<T>::OPimAccessTemplate( BackEnd* end )
 {
     if (end )
         end->setFrontend( this );
 }
 template <class T>
 OPimAccessTemplate<T>::~OPimAccessTemplate() {
     qWarning("~OPimAccessTemplate<T>");
     delete m_backEnd;
 }
 template <class T>
 bool OPimAccessTemplate<T>::load() {
     invalidateCache();
     return m_backEnd->load();
 }
 template <class T>
 bool OPimAccessTemplate<T>::reload() {
-    return m_backEnd->reload();
+        invalidateCache();  // zecke: I think this should be added (se)
+        return m_backEnd->reload();
 }
 template <class T>
 bool OPimAccessTemplate<T>::save() {
     return m_backEnd->save();
 }
 template <class T>
 OPimAccessTemplate<T>::List OPimAccessTemplate<T>::allRecords()const {
     QArray<int> ints = m_backEnd->allRecords();
     List lis(ints, this );
     return lis;
 }
 template <class T>
 OPimAccessTemplate<T>::List
 OPimAccessTemplate<T>::queryByExample( const T& t, int sortOrder ) {
     QArray<int> ints = m_backEnd->queryByExample( t, sortOrder );