/***************************************************************************
 *   KSystemLog, a system log viewer tool                                  *
 *   Copyright (C) 2007 by Nicolas Ternisien                               *
 *   nicolas.ternisien@gmail.com                                           *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   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 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.          *
 ***************************************************************************/

#ifndef _CUPS_ACCESS_ANALYZER_H_
#define _CUPS_ACCESS_ANALYZER_H_


#include <klocale.h>

#include "analyzer.h"

#include "localLogFileReader.h"
#include "logging.h"
#include "parsingHelper.h"

#include "cupsAccessLogMode.h"

class CupsAccessAnalyzer : public Analyzer {
	
	Q_OBJECT
	
	public:
		explicit CupsAccessAnalyzer(LogMode* logMode) :
			Analyzer(logMode),
			cupsAccessRegex("(\\S*) (\\S*) (\\S*) \\[(.*)\\] \"(.*)\" (\\S*) (\\S*) (\\S*) (\\S*)") {
		}
		
		virtual ~CupsAccessAnalyzer() {
			
		}

		LogViewColumns initColumns() {
			LogViewColumns columns;
	
			columns.addColumn(LogViewColumn(i18n("Date"), true, false));
			columns.addColumn(LogViewColumn(i18n("Host"), true, true));
			columns.addColumn(LogViewColumn(i18n("Group"), true, true));
			columns.addColumn(LogViewColumn(i18n("User"), true, true));
			columns.addColumn(LogViewColumn(i18n("HTTP Request"), true, false));
			columns.addColumn(LogViewColumn(i18n("Status"), true, true));
			columns.addColumn(LogViewColumn(i18n("Bytes"), true, false));
			columns.addColumn(LogViewColumn(i18n("IPP Operation"), true, false));
			columns.addColumn(LogViewColumn(i18n("IPP Status"), true, false));

			return columns;
		}

		
	protected:
		
		QRegExp cupsAccessRegex;
		
		LogFileReader* createLogFileReader(const LogFile& logFile) {
			return new LocalLogFileReader(logFile);
		}

		Analyzer::LogFileSortMode logFileSortMode() {
			return Analyzer::AscendingSortedLogFile;
		}

		/*
		 * http://www.cups.org/documentation.php/ref-access_log.html
		 * 
		 * host group user date-time \"method resource version\" status bytes ipp-operation ipp-status
		 * 10.0.1.2 - - [01/Dec/2005:21:50:28 +0000] "POST / HTTP/1.1" 200 317 CUPS-Get-Printers successful-ok-ignored-or-substituted-attributes
		 * localhost - - [01/Dec/2005:21:50:32 +0000] "GET /admin HTTP/1.1" 200 0 - -
		 * localhost - - [01/Dec/2005:21:50:32 +0000] "POST / HTTP/1.1" 200 157 CUPS-Get-Printers successful-ok-ignored-or-substituted-attributes
		 * localhost - - [01/Dec/2005:21:50:32 +0000] "POST / HTTP/1.1" 200 1411 CUPS-Get-Devices -
		 * localhost - - [01/Dec/2005:21:50:32 +0000] "GET /admin HTTP/1.1" 200 6667 - -
		 * 
		 */
		LogLine* parseMessage(const QString& logLine, const LogFile& originalLogFile) {
			
			QString line(logLine);

			int firstPosition = cupsAccessRegex.indexIn(logLine);
			if (firstPosition == -1) {
				logDebug() << "Unable to parse line " << logLine << endl;
				return NULL;
			}
						
			QStringList capturedTexts = cupsAccessRegex.capturedTexts();

			//Remove full line
			capturedTexts.removeAt(0);
			
			capturedTexts.replace(5, ParsingHelper::instance()->parseHttpResponse(capturedTexts.at(5)));
			capturedTexts.replace(6, ParsingHelper::instance()->parseSize(capturedTexts.at(6)));

			QDateTime dateTime=ParsingHelper::instance()->parseHttpDateTime(capturedTexts.takeAt(3));
			
			LogLevel* logLevel = findLevel(capturedTexts.at(capturedTexts.count()-1));

			return new LogLine(
					logLineInternalIdGenerator++,
					dateTime, 
					capturedTexts, 
					originalLogFile.url().path(), 
					logLevel, 
					logMode
			);
		}
		
		inline LogLevel* findLevel(const QString& status) const {
			if (status == "successful-ok")
				return Globals::instance()->informationLogLevel();
			else if (status == "ignored")
				return Globals::instance()->warningLogLevel(); 

			return Globals::instance()->noticeLogLevel(); 
		}
};

#endif // _CUPS_ACCESS_ANALYZER_H_
