kde-playground/kdepim/knode/kscoring.cpp

/*
  kscoring.cpp

  Copyright (c) 2001 Mathias Waack <mathias@atoll-net.de>
  Copyright (C) 2005 by Volker Krause <vkrause@kde.org>

  Author: Mathias Waack <mathias@atoll-net.de>

  This program 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; either version 2 of the License, or
  (at your option) any later version.
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software Foundation,
  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, US
*/
#ifdef KDE_USE_FINAL
#undef QT_NO_ASCII_CAST
#endif

#undef QT_NO_COMPAT

#include "kscoring.h"
#include "kscoringeditor.h"

#include <KDebug>
#include <KLocale>
#include <KInputDialog>
#include <KStandardDirs>
#include <KTextEdit>

#include <QCheckBox>
#include <QDomElement>
#include <QDomDocument>
#include <QDomNode>
#include <QDomNodeList>
#include <QFile>
#include <QLayout>
#include <QLabel>
#include <QTextStream>
#include <QVBoxLayout>
#include <Q3PtrList>

#include <iostream>

using namespace KPIM;

//----------------------------------------------------------------------------
// a small function to encode attribute values, code stolen from QDom
static QString toXml( const QString &str )
{
  QString tmp(str);
  uint len = tmp.length();
  uint i = 0;
  while ( i < len ) {
    if ( tmp[(int)i] == '<' ) {
      tmp.replace( i, 1, "&lt;" );
      len += 3;
      i += 4;
    } else if ( tmp[(int)i] == '"' ) {
      tmp.replace( i, 1, "&quot;" );
      len += 5;
      i += 6;
    } else if ( tmp[(int)i] == '&' ) {
       tmp.replace( i, 1, "&amp;" );
       len += 4;
       i += 5;
    } else if ( tmp[(int)i] == '>' ) {
       tmp.replace( i, 1, "&gt;" );
       len += 3;
       i += 4;
    } else {
       ++i;
    }
  }

  return tmp;
}

// small dialog to display the messages from NotifyAction
NotifyDialog *NotifyDialog::me = 0;
NotifyDialog::NotesMap NotifyDialog::dict;

NotifyDialog::NotifyDialog( QWidget *parent )
  : KDialog( parent )
{
  setCaption( i18n( "Notify Message" ) );
  setButtons( Close );
  setDefaultButton( Close );
  setModal( true );

  QFrame *f = new QFrame( this );
  setMainWidget ( f );
  QVBoxLayout *topL = new QVBoxLayout( f );
  note = new QLabel( f );
  note->setTextFormat( Qt::RichText );
  topL->addWidget( note );
  QCheckBox *check = new QCheckBox( i18n( "Do not show this message again" ), f );
  check->setChecked( true );
  topL->addWidget( check );
  connect( check, SIGNAL(toggled(bool)), SLOT(slotShowAgainToggled(bool)) );
}

void NotifyDialog::slotShowAgainToggled( bool flag )
{
  dict.remove( msg );
  dict.insert( msg, !flag );
  kDebug(5100) <<"note \"" << note <<"\" will popup again:" << flag;
}

void NotifyDialog::display( ScorableArticle &a, const QString &s )
{
  kDebug(5100) <<"displaying message";
  if ( !me ) {
    me = new NotifyDialog();
  }
  me->msg = s;

  NotesMap::Iterator i = dict.find( s );
  if ( i == dict.end() || i.value() ) {
    QString msg =
      i18n( "Article\n<b>%1</b><br /><b>%2</b><br />caused the following note to appear:<br />%3",
           a.from(),
           a.subject(),
           s );
    me->note->setText(msg);
    if ( i == dict.end() ) {
      dict.remove( s );
      i = dict.insert( s, false );
    }
    me->adjustSize();
    me->exec();
  }
}

//----------------------------------------------------------------------------
ScorableArticle::~ScorableArticle()
{
}

void ScorableArticle::displayMessage( const QString &note )
{
  NotifyDialog::display( *this, note );
}

//----------------------------------------------------------------------------
ScorableGroup::~ScorableGroup()
{
}

// the base class for all actions
ActionBase::ActionBase()
{
  kDebug(5100) <<"new Action" << this;
}

ActionBase::~ActionBase()
{
  kDebug(5100) <<"delete Action" << this;
}

QStringList ActionBase::userNames()
{
  QStringList l;
  l << userName( SETSCORE );
  l << userName( NOTIFY );
  l << userName( COLOR );
  l << userName( MARKASREAD );
  return l;
}

ActionBase *ActionBase::factory( int type, const QString &value )
{
  switch( type ) {
  case SETSCORE:
    return new ActionSetScore( value );
  case NOTIFY:
    return new ActionNotify( value );
  case COLOR:
    return new ActionColor( value );
  case MARKASREAD:
    return new ActionMarkAsRead();
  default:
    kWarning(5100) <<"unknown type" << type <<" in ActionBase::factory()";
    return 0;
  }
}

QString ActionBase::userName( int type )
{
  switch( type ) {
  case SETSCORE:
    return i18n( "Adjust Score" );
  case NOTIFY:
    return i18n( "Display Message" );
  case COLOR:
    return i18n( "Colorize Header" );
  case MARKASREAD:
    return i18n( "Mark as Read" );
  default:
    kWarning(5100) <<"unknown type" << type <<" in ActionBase::userName()";
    return 0;
  }
}

int ActionBase::getTypeForName( const QString &name )
{
  if ( name == "SETSCORE" ) {
    return SETSCORE;
  } else if ( name == "NOTIFY" ) {
    return NOTIFY;
  } else if ( name == "COLOR" ) {
    return COLOR;
  } else if ( name == "MARKASREAD" ) {
    return MARKASREAD;
  } else {
    kWarning(5100) <<"unknown type string" << name
                   << "in ActionBase::getTypeForName()";
    return -1;
  }
}

int ActionBase::getTypeForUserName( const QString &name )
{
  if ( name == userName( SETSCORE ) ) {
    return SETSCORE;
  } else if ( name == userName( NOTIFY ) ) {
    return NOTIFY;
  } else if ( name == userName( COLOR ) ) {
    return COLOR;
  } else if ( name == userName( MARKASREAD ) ) {
    return MARKASREAD;
  } else {
    kWarning(5100) <<"unknown type string" << name
                   << "in ActionBase::getTypeForUserName()";
    return -1;
  }
}

// the set score action
ActionSetScore::ActionSetScore( short v )
  : val( v )
{
}

ActionSetScore::ActionSetScore( const QString &s )
{
  val = s.toShort();
}

ActionSetScore::ActionSetScore( const ActionSetScore &as )
  : ActionBase(),
    val( as.val )
{
}

ActionSetScore::~ActionSetScore()
{
}

QString ActionSetScore::toString() const
{
  QString a;
  a += "<Action type=\"SETSCORE\" value=\"" + QString::number(val) + "\" />";
  return a;
}

void ActionSetScore::apply( ScorableArticle &a ) const
{
  a.addScore( val );
}

ActionSetScore *ActionSetScore::clone() const
{
  return new ActionSetScore( *this );
}

// the color action
ActionColor::ActionColor( const QColor &c )
  : ActionBase(), color( c )
{
}

ActionColor::ActionColor( const QString &s )
  : ActionBase()
{
  setValue(s);
}

ActionColor::ActionColor( const ActionColor &a )
  : ActionBase(), color( a.color )
{
}

ActionColor::~ActionColor()
{}

QString ActionColor::toString() const
{
  QString a;
  a += "<Action type=\"COLOR\" value=\"" + toXml(color.name()) + "\" />";
  return a;
}

void ActionColor::apply( ScorableArticle &a ) const
{
  a.changeColor( color );
}

ActionColor *ActionColor::clone() const
{
  return new ActionColor( *this );
}

// the notify action
ActionNotify::ActionNotify( const QString &s )
{
  note = s;
}

ActionNotify::ActionNotify( const ActionNotify &an )
  : ActionBase()
{
  note = an.note;
}

QString ActionNotify::toString() const
{
  return "<Action type=\"NOTIFY\" value=\"" + toXml(note) + "\" />";
}

void ActionNotify::apply( ScorableArticle &a ) const
{
  a.displayMessage( note );
}

ActionNotify *ActionNotify::clone() const
{
  return new ActionNotify( *this );
}

// mark as read action
ActionMarkAsRead::ActionMarkAsRead() :
  ActionBase()
{
}

ActionMarkAsRead::ActionMarkAsRead( const ActionMarkAsRead &action ) :
  ActionBase()
{
  Q_UNUSED( action );
}

QString ActionMarkAsRead::toString() const
{
  return "<Action type=\"MARKASREAD\"/>";
}

void ActionMarkAsRead::apply( ScorableArticle &article ) const
{
  article.markAsRead();
}

ActionMarkAsRead *ActionMarkAsRead::clone() const
{
  return new ActionMarkAsRead( *this );
}

//----------------------------------------------------------------------------
NotifyCollection::NotifyCollection()
{
  notifyList.setAutoDelete( true );
}

NotifyCollection::~NotifyCollection()
{
}

void NotifyCollection::addNote( const ScorableArticle &a, const QString &note )
{
  article_list *l = notifyList.find( note );
  if ( !l ) {
    notifyList.insert( note, new article_list );
    l = notifyList.find( note );
  }
  article_info i;
  i.from = a.from();
  i.subject = a.subject();
  l->append(i);
}

QString NotifyCollection::collection() const
{
  QString notifyCollection = i18n( "<h1>List of collected notes</h1>" );
  notifyCollection += "<p><ul>";
  // first look thru the notes and create one string
  Q3DictIterator<article_list> it(notifyList);
  for ( ; it.current(); ++it ) {
    const QString &note = it.currentKey();
    notifyCollection += "<li>" + note + "<ul>";
    article_list *alist = it.current();
    article_list::Iterator ait;
    for ( ait = alist->begin(); ait != alist->end(); ++ait ) {
      notifyCollection += "<li><b>From: </b>" + (*ait).from + "<br>";
      notifyCollection += "<b>Subject: </b>" + (*ait).subject;
    }
    notifyCollection += "</ul>";
  }
  notifyCollection += "</ul>";

  return notifyCollection;
}

void NotifyCollection::displayCollection( QWidget *p ) const
{
  //KMessageBox::information(p,collection(),i18n("Collected Notes"));
  KDialog *dlg = new KDialog( p );
  dlg->setCaption( i18n( "Collected Notes" ) );
  dlg->setButtons( KDialog::Close );
  dlg->setDefaultButton( KDialog::Close );
  dlg->setModal( false );
  KTextEdit *text = new KTextEdit( dlg );
  text->setReadOnly( true );
  text->setText( collection() );
  dlg->setMainWidget( text );
  dlg->setMinimumWidth( 300 );
  dlg->setMinimumHeight( 300 );
  dlg->show();
}

//----------------------------------------------------------------------------
KScoringExpression::KScoringExpression( const QString &h, const QString &t,
                                        const QString &n, const QString &ng )
  : header( h ), expr_str( n )
{
  if ( t == "MATCH" ) {
    cond = MATCH;
    expr.setPattern( expr_str );
    expr.setCaseSensitivity( Qt::CaseInsensitive );
  } else if ( t == "MATCHCS" ) {
    cond = MATCHCS;
    expr.setPattern( expr_str );
    expr.setCaseSensitivity( Qt::CaseSensitive );
  } else if ( t == "CONTAINS" ) {
    cond = CONTAINS;
  } else if ( t == "EQUALS" ) {
    cond = EQUALS;
  } else if ( t == "GREATER" ) {
    cond = GREATER;
    expr_int = expr_str.toInt();
  } else if ( t == "SMALLER" ) {
    cond = SMALLER;
    expr_int = expr_str.toInt();
  } else {
    kDebug(5100) <<"unknown match type in new expression";
  }

  neg = ng.toInt();

  kDebug(5100) <<"new expr:" << header << t
               << expr_str << neg;
}

// static
int KScoringExpression::getConditionForName( const QString &s )
{
  if ( s == getNameForCondition( CONTAINS ) ) {
    return CONTAINS;
  } else if ( s == getNameForCondition( MATCH ) ) {
    return MATCH;
  } else if ( s == getNameForCondition( MATCHCS ) ) {
    return MATCHCS;
  } else if ( s == getNameForCondition( EQUALS ) ) {
    return EQUALS;
  } else if ( s == getNameForCondition( SMALLER ) ) {
    return SMALLER;
  } else if ( s == getNameForCondition( GREATER ) ) {
    return GREATER;
  } else {
    kWarning(5100) <<"unknown condition name" << s
                   << "in KScoringExpression::getConditionForName()";
    return -1;
  }
}

// static
QString KScoringExpression::getNameForCondition( int cond )
{
  switch ( cond ) {
  case CONTAINS:
    return i18n( "Contains Substring" );
  case MATCH:
    return i18n( "Matches Regular Expression" );
  case MATCHCS:
    return i18n( "Matches Regular Expression (Case Sensitive)" );
  case EQUALS:
    return i18n( "Is Exactly the Same As" );
  case SMALLER:
    return i18n( "Less Than" );
  case GREATER:
    return i18n( "Greater Than" );
  default:
    kWarning(5100) <<"unknown condition" << cond
                   << "in KScoringExpression::getNameForCondition()";
    return "";
  }
}

// static
QStringList KScoringExpression::conditionNames()
{
  QStringList l;
  l << getNameForCondition( CONTAINS );
  l << getNameForCondition( MATCH );
  l << getNameForCondition( MATCHCS );
  l << getNameForCondition( EQUALS );
  l << getNameForCondition( SMALLER );
  l << getNameForCondition( GREATER );
  return l;
}

// static
QStringList KScoringExpression::headerNames()
{
  QStringList l;
  l.append( "From" );
  l.append( "Message-ID" );
  l.append( "Subject" );
  l.append( "Date" );
  l.append( "References" );
  l.append( "NNTP-Posting-Host" );
  l.append( "Bytes" );
  l.append( "Lines" );
  l.append( "Xref" );
  return l;
}

KScoringExpression::~KScoringExpression()
{
}

bool KScoringExpression::match( ScorableArticle &a ) const
{
  bool res = true;
  QString head;

  if ( header == "From" ) {
    head = a.from();
  } else if ( header == "Subject" ) {
    head = a.subject();
  } else {
    head = a.getHeaderByType( header );
  }

  if ( !head.isEmpty() ) {
    switch( cond ) {
    case EQUALS:
      res = ( head.toLower() == expr_str.toLower() );
      break;
    case CONTAINS:
      res = ( head.toLower().indexOf( expr_str.toLower() ) >= 0 );
      break;
    case MATCH:
    case MATCHCS:
      res = ( expr.indexIn( head ) != -1 );
      break;
    case GREATER:
      res = ( head.toInt() > expr_int );
      break;
    case SMALLER:
      res = ( head.toInt() < expr_int );
      break;
    default:
      kDebug(5100) <<"unknown match";
      res = false;
    }
  } else {
    res = false;
  }

  return neg ? !res : res;
}

void KScoringExpression::write( QTextStream &st ) const
{
  st << toString();
}

QString KScoringExpression::toString() const
{
  QString e;
  e += "<Expression neg=\"" + QString::number( neg ? 1 : 0 ) +
       "\" header=\"" + header +
       "\" type=\"" + getTypeString() +
       "\" expr=\"" + toXml(expr_str) +
       "\" />";

  return e;
}

QString KScoringExpression::getTypeString() const
{
  return KScoringExpression::getTypeString(cond);
}

QString KScoringExpression::getTypeString( int cond )
{
  switch( cond ) {
  case CONTAINS:
    return "CONTAINS";
  case MATCH:
    return "MATCH";
  case MATCHCS:
    return "MATCHCS";
  case EQUALS:
    return "EQUALS";
  case SMALLER:
    return "SMALLER";
  case GREATER:
    return "GREATER";
  default:
    kWarning(5100) <<"unknown cond" << cond
                   <<" in KScoringExpression::getTypeString()";
    return "";
  }
}

int  KScoringExpression::getType() const
{
  return cond;
}

//----------------------------------------------------------------------------
KScoringRule::KScoringRule( const QString &n )
  : name( n ), link( AND )
{
  expressions.setAutoDelete( true );
  actions.setAutoDelete( true );
}

KScoringRule::KScoringRule( const KScoringRule &r )
{
  kDebug(5100) <<"copying rule" << r.getName();
  name = r.getName();
  expressions.setAutoDelete( true );
  actions.setAutoDelete( true );
  // copy expressions
  expressions.clear();
  const ScoreExprList &rexpr = r.expressions;
  Q3PtrListIterator<KScoringExpression> it( rexpr );
  for ( ; it.current(); ++it ) {
    KScoringExpression *t = new KScoringExpression( **it );
    expressions.append( t );
  }
  // copy actions
  actions.clear();
  const ActionList &ract = r.actions;
  Q3PtrListIterator<ActionBase> ait( ract );
  for ( ; ait.current(); ++ait ) {
    ActionBase *t = *ait;
    actions.append( t->clone() );
  }
  // copy groups, servers, linkmode and expires
  groups = r.groups;
  expires = r.expires;
  link = r.link;
}

KScoringRule::~KScoringRule()
{
  cleanExpressions();
  cleanActions();
}

void KScoringRule::cleanExpressions()
{
  // the expressions is setAutoDelete(true)
  expressions.clear();
}

void KScoringRule::cleanActions()
{
  // the actions is setAutoDelete(true)
  actions.clear();
}

void KScoringRule::addExpression( KScoringExpression *expr )
{
  kDebug(5100) <<"KScoringRule::addExpression";
  expressions.append(expr);
}

void KScoringRule::addAction( int type, const QString &val )
{
  ActionBase *action = ActionBase::factory( type, val );
  addAction( action );
}

void KScoringRule::addAction( ActionBase *a )
{
  kDebug(5100) <<"KScoringRule::addAction()" << a->toString();
  actions.append(a);
}

void KScoringRule::setLinkMode( const QString &l )
{
  if ( l == "OR" ) {
    link = OR;
  } else {
    link = AND;
  }
}

void KScoringRule::setExpire( const QString &e )
{
  if ( e != "never" ) {
    QStringList l = e.split( '-', QString::SkipEmptyParts );
    Q_ASSERT( l.count() == 3 );
    expires.setYMD( l.at(0).toInt(), l.at(1).toInt(), l.at(2).toInt() );
  }
  kDebug(5100) <<"Rule" << getName() <<" expires at" << getExpireDateString();
}

bool KScoringRule::matchGroup( const QString &group ) const
{
  for ( GroupList::ConstIterator i = groups.begin(); i != groups.end(); ++i ) {
    QRegExp e( *i );
    if ( e.indexIn( group, 0 ) != -1 && e.matchedLength() == group.length() ) {
      return true;
    }
  }
  return false;
}

void KScoringRule::applyAction( ScorableArticle &a ) const
{
  Q3PtrListIterator<ActionBase> it( actions );
  for ( ; it.current(); ++it ) {
    it.current()->apply( a );
  }
}

void KScoringRule::applyRule( ScorableArticle &a ) const
{
  bool oper_and = ( link == AND );
  bool res = true;
  Q3PtrListIterator<KScoringExpression> it( expressions );

  for ( ; it.current(); ++it ) {
    Q_ASSERT( it.current() );
    res = it.current()->match( a );
    if ( !res && oper_and ) {
      return;
    } else if ( res && !oper_and ) {
      break;
    }
  }
  if ( res ) {
    applyAction( a );
  }
}

void KScoringRule::applyRule( ScorableArticle &a, const QString &g ) const
{
  // check if one of the groups match
  for ( QStringList::ConstIterator i = groups.begin(); i != groups.end(); ++i ) {
    if ( QRegExp( *i ).indexIn( g ) != -1 ) {
      applyRule( a );
      return;
    }
  }
}

void KScoringRule::write( QTextStream &s ) const
{
  s << toString();
}

QString KScoringRule::toString() const
{
  QString r;
  r += "<Rule name=\"" + toXml(name) + "\" linkmode=\"" + getLinkModeName();
  r += "\" expires=\"" + getExpireDateString() + "\">";

  for ( GroupList::ConstIterator i = groups.begin(); i != groups.end(); ++i ) {
    r += "<Group name=\"" + toXml(*i) + "\" />";
  }

  Q3PtrListIterator<KScoringExpression> eit(expressions);
  for ( ; eit.current(); ++eit ) {
    r += eit.current()->toString();
  }

  Q3PtrListIterator<ActionBase> ait(actions);
  for ( ; ait.current(); ++ait ) {
    r += ait.current()->toString();
  }
  r += "</Rule>";
  return r;
}

QString KScoringRule::getLinkModeName() const
{
  switch( link ) {
  case AND:
    return "AND";
  case OR:
    return "OR";
  default:
    return "AND";
  }
}

QString KScoringRule::getExpireDateString() const
{
  if ( expires.isNull() ) {
    return "never";
  } else {
    return
      QString::number( expires.year() ) + QString( '-' ) +
      QString::number( expires.month() ) + QString( '-' ) +
      QString::number( expires.day() );
  }
}

bool KScoringRule::isExpired() const
{
  return
    expires.isValid() &&
    ( expires < QDate::currentDate() );
}

//----------------------------------------------------------------------------
KScoringManager::KScoringManager( const QString &appName )
  :  cacheValid( false )
{
  allRules.setAutoDelete( true );
  // determine filename of the scorefile
  if ( appName.isEmpty() ) {
    mFilename = KGlobal::dirs()->saveLocation( "appdata" ) + "/scorefile";
  } else {
    mFilename = KGlobal::dirs()->saveLocation( "data" ) + '/' + appName + "/scorefile";
  }
  // open the score file
  load();
}

KScoringManager::~KScoringManager()
{
}

void KScoringManager::load()
{
  QDomDocument sdoc( "Scorefile" );
  QFile f( mFilename );
  if ( !f.open( QIODevice::ReadOnly ) ) {
    return;
  }
  if ( !sdoc.setContent( &f ) ) {
    f.close();
    kDebug(5100) <<"loading the scorefile failed";
    return;
  }
  f.close();
  kDebug(5100) <<"loaded the scorefile, creating internal representation";
  allRules.clear();
  createInternalFromXML( sdoc );
  expireRules();
  kDebug(5100) <<"ready, got" << allRules.count() <<" rules";
}

void KScoringManager::save()
{
  kDebug(5100) <<"KScoringManager::save() starts";
  QFile f( mFilename );
  if ( !f.open( QIODevice::WriteOnly ) ) {
    return;
  }
  QTextStream stream( &f );
  stream.setCodec( "UTF-8" );
  kDebug(5100) <<"KScoringManager::save() creating xml";
  createXMLfromInternal().save( stream, 2 );
  kDebug(5100) <<"KScoringManager::save() finished";
}

QDomDocument KScoringManager::createXMLfromInternal()
{
  // I was'nt able to create a QDomDocument in memory:(
  // so I write the content into a string, which is really stupid
  QDomDocument sdoc( "Scorefile" );
  QString ss; // scorestring
  ss += "<?xml version = '1.0'?><!DOCTYPE Scorefile >";
  ss += toString();
  ss += "</Scorefile>\n";
  kDebug(5100) <<"KScoringManager::createXMLfromInternal():" << endl << ss;
  sdoc.setContent(ss);
  return sdoc;
}

QString KScoringManager::toString() const
{
  QString s;
  s += "<Scorefile>\n";
  Q3PtrListIterator<KScoringRule> it( allRules );
  for ( ; it.current(); ++it ) {
    s += it.current()->toString();
  }
  return s;
}

void KScoringManager::expireRules()
{
  for ( KScoringRule *cR = allRules.first(); cR; cR=allRules.next() ) {
    if ( cR->isExpired() ) {
      kDebug(5100) <<"Rule" << cR->getName() <<" is expired, deleting it";
      allRules.remove();
    }
  }
}

void KScoringManager::createInternalFromXML( QDomNode n )
{
  static KScoringRule *cR = 0; // the currentRule
  // the XML file was parsed and now we simply traverse the resulting tree
  if ( !n.isNull() ) {
    kDebug(5100) <<"inspecting node of type" << n.nodeType()
                  << "named" << n.toElement().tagName();

    switch ( n.nodeType() ) {
    case QDomNode::DocumentNode:
    {
      // the document itself
      break;
    }
    case QDomNode::ElementNode:
    {
      // Server, Newsgroup, Rule, Expression, Action
      QDomElement e = n.toElement();
      QString s = e.tagName();
      if ( s == "Rule" ) {
        cR = new KScoringRule( e.attribute( "name" ) );
        cR->setLinkMode( e.attribute( "linkmode" ) );
        cR->setExpire( e.attribute( "expires" ) );
        addRuleInternal( cR );
      } else if ( s == "Group" ) {
        Q_CHECK_PTR( cR );
        cR->addGroup( e.attribute( "name" ) );
      } else if ( s == "Expression" ) {
        cR->addExpression( new KScoringExpression( e.attribute( "header" ),
                                                   e.attribute( "type" ),
                                                   e.attribute( "expr" ),
                                                   e.attribute( "neg" ) ) );
      } else if ( s == "Action" ) {
        Q_CHECK_PTR( cR );
        cR->addAction( ActionBase::getTypeForName( e.attribute( "type" ) ),
                       e.attribute( "value" ) );
      }
      break;
    }
    default:
      ;
    }
    QDomNodeList nodelist = n.childNodes();
    int cnt = nodelist.count();
    for ( int i=0; i<cnt; ++i ) {
      createInternalFromXML( nodelist.item( i ) );
    }
  }
}

KScoringRule *KScoringManager::addRule( const ScorableArticle &a,
                                        const QString &group, short score )
{
  KScoringRule *rule = new KScoringRule( findUniqueName() );
  rule->addGroup( group );
  rule->addExpression( new KScoringExpression( "From","CONTAINS", a.from(), "0" ) );
  if ( score ) {
    rule->addAction( new ActionSetScore( score ) );
  }
  rule->setExpireDate( QDate::currentDate().addDays( 30 ) );
  KScoringEditor *edit = KScoringEditor::createEditor( this );
  // Note: the call to createEditor() call this->pushRuleList(). So addRule(KScoringRule)
  // must be place after it, otherwise the cancel button of the editor is not effective (bug #101092).
  addRule( rule );
  edit->setRule( rule );
  edit->show();
  setCacheValid( false );
  return rule;
}

KScoringRule *KScoringManager::addRule( KScoringRule *expr )
{
  int i = allRules.findRef( expr );
  if ( i == -1 ) {
    // only add a rule we don't know
    addRuleInternal( expr );
  } else {
    emit changedRules();
  }
  return expr;
}

KScoringRule *KScoringManager::addRule()
{
  KScoringRule *rule = new KScoringRule( findUniqueName() );
  addRule( rule );
  return rule;
}

void KScoringManager::addRuleInternal( KScoringRule *e )
{
  allRules.append( e ) ;
  setCacheValid( false );
  emit changedRules();
  kDebug(5100) <<"KScoringManager::addRuleInternal" << e->getName();
}

void KScoringManager::cancelNewRule( KScoringRule *r )
{
  // if e was'nt previously added to the list of rules, we delete it
  int i = allRules.findRef( r );
  if ( i == -1 ) {
    kDebug(5100) <<"deleting rule" << r->getName();
    deleteRule( r );
  } else {
    kDebug(5100) <<"rule" << r->getName() <<" not deleted";
  }
}

void KScoringManager::setRuleName( KScoringRule *r, const QString &s )
{
  bool cont = true;
  QString text = s;
  QString oldName = r->getName();
  while ( cont ) {
    cont = false;
    Q3PtrListIterator<KScoringRule> it( allRules );
    for ( ; it.current(); ++it ) {
      if ( it.current() != r && it.current()->getName() == text ) {
        kDebug(5100) <<"rule name" << text <<" is not unique";
        text = KInputDialog::getText(
          i18n( "Choose Another Rule Name" ),
          i18n( "The rule name is already assigned, please choose another name:" ),
          text );
        cont = true;
        break;
      }
    }
  }
  if ( text != oldName ) {
    r->setName( text );
    emit changedRuleName( oldName, text );
  }
}

void KScoringManager::deleteRule( KScoringRule *r )
{
  int i = allRules.findRef( r );
  if ( i != -1 ) {
    allRules.remove();
    emit changedRules();
  }
}

void KScoringManager::editRule( KScoringRule *e, QWidget *w )
{
  KScoringEditor *edit = KScoringEditor::createEditor( this, w );
  edit->setRule( e );
  edit->show();
  delete edit;
}

void KScoringManager::moveRuleAbove( KScoringRule *above, KScoringRule *below )
{
  int aindex = allRules.findRef( above );
  int bindex = allRules.findRef( below );
  if ( aindex <= 0 || bindex < 0 ) {
    return;
  }
  if ( aindex < bindex ) {
    --bindex;
  }
  allRules.take( aindex );
  allRules.insert( bindex, above );
}

void KScoringManager::moveRuleBelow( KScoringRule *below, KScoringRule *above )
{
  int bindex = allRules.findRef( below );
  int aindex = allRules.findRef( above );
  if ( bindex < 0 || bindex >= (int)allRules.count() - 1 || aindex < 0 ) {
    return;
  }
  if ( bindex < aindex ) {
    --aindex;
  }
  allRules.take( bindex );
  allRules.insert( aindex + 1, below );
}

void KScoringManager::editorReady()
{
  kDebug(5100) <<"emitting signal finishedEditing";
  save();
  emit finishedEditing();
}

KScoringRule *KScoringManager::copyRule( KScoringRule *r )
{
  KScoringRule *rule = new KScoringRule( *r );
  rule->setName( findUniqueName() );
  addRuleInternal( rule );
  return rule;
}

void KScoringManager::applyRules( ScorableGroup * )
{
  kWarning(5100) <<"KScoringManager::applyRules(ScorableGroup* ) isn't implemented";
}

void KScoringManager::applyRules( ScorableArticle &article, const QString &group )
{
  setGroup( group );
  applyRules( article );
}

void KScoringManager::applyRules( ScorableArticle &a )
{
  Q3PtrListIterator<KScoringRule> it( isCacheValid() ? ruleList : allRules );
  for ( ; it.current(); ++it ) {
    it.current()->applyRule( a );
  }
}

void KScoringManager::initCache( const QString &g )
{
  group = g;
  ruleList.clear();
  Q3PtrListIterator<KScoringRule> it(allRules);
  for ( ; it.current(); ++it ) {
    if ( it.current()->matchGroup( group ) ) {
      ruleList.append( it.current() );
    }
  }
  kDebug(5100) <<"created cache for group" << group
               << "with" << ruleList.count() << "rules";
  setCacheValid( true );
}

void KScoringManager::setGroup( const QString &g )
{
  if ( group != g ) {
    initCache( g );
  }
}

bool KScoringManager::hasRulesForCurrentGroup()
{
  return ruleList.count() != 0;
}

QStringList KScoringManager::getRuleNames()
{
  QStringList l;
  Q3PtrListIterator<KScoringRule> it( allRules );
  for ( ; it.current(); ++it ) {
    l << it.current()->getName();
  }
  return l;
}

KScoringRule *KScoringManager::findRule( const QString &ruleName )
{
  Q3PtrListIterator<KScoringRule> it( allRules );
  for ( ; it.current(); ++it ) {
    if ( it.current()->getName() == ruleName ) {
      return it;
    }
  }
  return 0;
}

bool KScoringManager::setCacheValid( bool v )
{
  bool res = cacheValid;
  cacheValid = v;
  return res;
}

QString KScoringManager::findUniqueName() const
{
  int nr = 0;
  QString ret;
  bool duplicated = false;

  while ( nr < 99999999 ) {
    nr++;
    ret = i18n( "rule %1", nr );

    duplicated = false;
    Q3PtrListIterator<KScoringRule> it( allRules );
    for ( ; it.current(); ++it ) {
      if ( it.current()->getName() == ret ) {
        duplicated = true;
        break;
      }
    }

    if ( !duplicated ) {
      return ret;
    }
  }

  return ret;
}

bool KScoringManager::hasFeature( int p )
{
  switch ( p ) {
  case ActionBase::SETSCORE:
    return canScores();
  case ActionBase::NOTIFY:
    return canNotes();
  case ActionBase::COLOR:
    return canColors();
  case ActionBase::MARKASREAD:
    return canMarkAsRead();
  default:
    return false;
  }
}

QStringList KScoringManager::getDefaultHeaders() const
{
  QStringList l;
  l.append( "Subject" );
  l.append( "From" );
  l.append( "Date" );
  l.append( "Message-ID" );
  return l;
}

void KScoringManager::pushRuleList()
{
  stack.push( allRules );
}

void KScoringManager::popRuleList()
{
  stack.pop( allRules );
}

void KScoringManager::removeTOS()
{
  stack.drop();
}

RuleStack::RuleStack()
{
}

RuleStack::~RuleStack()
{}

void RuleStack::push( Q3PtrList<KScoringRule> &l )
{
  kDebug(5100) <<"RuleStack::push pushing list with" << l.count() <<" rules";
  KScoringManager::ScoringRuleList *l1 = new KScoringManager::ScoringRuleList;
  for ( KScoringRule *r=l.first(); r != 0; r=l.next() ) {
    l1->append( new KScoringRule( *r ) );
  }
  stack.push( l1 );
  kDebug(5100) <<"now there are" << stack.count() <<" lists on the stack";
}

void RuleStack::pop( Q3PtrList<KScoringRule> &l )
{
  top( l );
  drop();
  kDebug(5100) <<"RuleStack::pop pops list with" << l.count() <<" rules";
  kDebug(5100) <<"now there are" << stack.count() <<" lists on the stack";
}

void RuleStack::top( Q3PtrList<KScoringRule> &l )
{
  l.clear();
  KScoringManager::ScoringRuleList *l1 = stack.top();
  l = *l1;
}

void RuleStack::drop()
{
  kDebug(5100) <<"drop: now there are" << stack.count() <<" lists on the stack";
  stack.remove();
}