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/* -*- mode: C++; c-file-style: "gnu" -*-
spamheaderanalyzer.cpp
This file is part of KMail, the KDE mail client.
Copyright (c) 2004 Patrick Audley <paudley@blackcat.ca>
Copyright (c) 2004 Ingo Kloecker <kloecker@kde.org>
KMail 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.
KMail 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
In addition, as a special exception, the copyright holders give
permission to link the code of this program with any edition of
the Qt library by Trolltech AS, Norway (or with modified versions
of Qt that use the same license as Qt), and distribute linked
combinations including the two. You must obey the GNU General
Public License in all respects for all of the code used other than
Qt. If you modify this file, you may extend this exception to
your version of the file, but you are not obligated to do so. If
you do not wish to do so, delete this exception statement from
your version.
*/
#include "spamheaderanalyzer.h"
#include "antispamconfig.h"
#include "kmmessage.h"
#include <kdebug.h>
using namespace KMail;
// static
SpamScores SpamHeaderAnalyzer::getSpamScores( const KMMessage* message ) {
kdDebug(5006) << k_funcinfo << endl;
SpamScores scores;
SpamAgents agents = AntiSpamConfig::instance()->uniqueAgents();
for ( SpamAgentsIterator it = agents.begin(); it != agents.end(); ++it ) {
float score = -2.0;
// Skip bogus agents
if ( (*it).scoreType() == SpamAgentNone )
continue;
// Do we have the needed field for this agent?
QString mField = message->headerField( (*it).header() );
if ( mField.isEmpty() )
continue;
QString scoreString;
bool scoreValid = false;
if ( (*it).scoreType() != SpamAgentBool ) {
// Can we extract the score?
QRegExp scorePattern = (*it).scorePattern();
if ( scorePattern.search( mField ) != -1 ) {
scoreString = scorePattern.cap( 1 );
scoreValid = true;
}
} else
scoreValid = true;
if ( !scoreValid ) {
score = -5.0;
kdDebug(5006) << "Score could not be extracted from header '"
<< mField << "'" << endl;
} else {
bool floatValid = false;
switch ( (*it).scoreType() ) {
case SpamAgentNone:
score = -2.0;
break;
case SpamAgentBool:
if( (*it).scorePattern().search( mField ) == -1 )
score = 0.0;
else
score = 100.0;
break;
case SpamAgentFloat:
score = scoreString.toFloat( &floatValid );
if ( !floatValid ) {
score = -3.0;
kdDebug(5006) << "Score (" << scoreString << ") is no number"
<< endl;
}
else
score *= 100.0;
break;
case SpamAgentFloatLarge:
score = scoreString.toFloat( &floatValid );
if ( !floatValid ) {
score = -3.0;
kdDebug(5006) << "Score (" << scoreString << ") is no number"
<< endl;
}
break;
case SpamAgentAdjustedFloat:
score = scoreString.toFloat( &floatValid );
if ( !floatValid ) {
score = -3.0;
kdDebug(5006) << "Score (" << scoreString << ") is no number"
<< endl;
break;
}
// Find the threshold value.
QString thresholdString;
QRegExp thresholdPattern = (*it).thresholdPattern();
if ( thresholdPattern.search( mField ) != -1 ) {
thresholdString = thresholdPattern.cap( 1 );
}
else {
score = -6.0;
kdDebug(5006) << "Threshold could not be extracted from header '"
<< mField << "'" << endl;
break;
}
float threshold = thresholdString.toFloat( &floatValid );
if ( !floatValid || ( threshold <= 0.0 ) ) {
score = -4.0;
kdDebug(5006) << "Threshold (" << thresholdString << ") is no "
<< "number or is negative" << endl;
break;
}
// Normalize the score. Anything below 0 means 0%, anything above
// threshold mean 100%. Values between 0 and threshold are mapped
// linearily to 0% - 100%.
if ( score < 0.0 )
score = 0.0;
else if ( score > threshold )
score = 100.0;
else
score = score / threshold * 100.0;
break;
}
}
scores.append( SpamScore( (*it).name(), score, mField ) );
}
return scores;
}
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