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diff --git a/src/knemod/interfacestatistics.h b/src/knemod/interfacestatistics.h
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+++ b/src/knemod/interfacestatistics.h
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+/* This file is part of KNemo
+   Copyright (C) 2005, 2006 Percy Leonhardt <percy@eris23.de>
+
+   KNemo 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.
+
+   KNemo 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 Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#ifndef INTERFACESTATISTICS_H
+#define INTERFACESTATISTICS_H
+
+#include <qobject.h>
+#include <qptrlist.h>
+
+#include "global.h"
+
+class QTimer;
+class Interface;
+
+template<class type>
+class StatisticsPtrList : public QPtrList<type>
+{
+protected:
+    virtual int compareItems ( QPtrCollection::Item item1, QPtrCollection::Item item2 )
+    {
+        StatisticEntry* entry1 = static_cast<StatisticEntry*>( item1 );
+        StatisticEntry* entry2 = static_cast<StatisticEntry*>( item2 );
+
+        if ( entry1->year > entry2->year )
+        {
+            return 1;
+        }
+        else if ( entry2->year > entry1->year )
+        {
+            return -1;
+        } // ...here we know that years are the same...
+        else if ( entry1->month > entry2->month )
+        {
+            return 1;
+        }
+        else if ( entry2->month > entry1->month )
+        {
+            return -1;
+        } // ...here we know that months are the same...
+        else if ( entry1->day > entry2->day )
+        {
+            return 1;
+        }
+        else if ( entry2->day > entry1->day )
+        {
+            return -1;
+        } // ...here we know that dates are equal.
+
+        return 0;
+    };
+};
+
+/**
+ * This class is able to collect transfered data for an interface,
+ * store it in a file and deliver it on request.
+ *
+ * @short Statistics of transfered data for an interface
+ * @author Percy Leonhardt <percy@eris23.de>
+ */
+
+class InterfaceStatistics : public QObject
+{
+    Q_OBJECT
+public:
+    /**
+     * Default Constructor
+     */
+    InterfaceStatistics( Interface* interface );
+
+    /**
+     * Default Destructor
+     */
+    virtual ~InterfaceStatistics();
+
+    /**
+     * Load the statistics from a xml file
+     */
+    void loadStatistics();
+
+    /**
+     * Called from Interface::configChanged() when the user
+     * changed the settings.
+     */
+    void configChanged();
+
+    const StatisticEntry* getCurrentDay() const;
+    const StatisticEntry* getCurrentMonth() const;
+    const StatisticEntry* getCurrentYear() const;
+    const StatisticsPtrList<StatisticEntry>& getDayStatistics() const;
+    const StatisticsPtrList<StatisticEntry>& getMonthStatistics() const;
+    const StatisticsPtrList<StatisticEntry>& getYearStatistics() const;
+
+signals:
+    /**
+     * The current entry has changed. There is only one signal
+     * for day, month and year because if the day changes,
+     * month and year also change.
+     */
+    void currentEntryChanged();
+    /**
+     * The list has changed i.e. there is a new day entry or the list was cleared
+     */
+    void dayStatisticsChanged();
+    /**
+     * The list has changed i.e. there is a new month entry or the list was cleared
+     */
+    void monthStatisticsChanged();
+    /**
+     * The list has changed i.e. there is a new year entry or the list was cleared
+     */
+    void yearStatisticsChanged();
+
+public slots:
+    /**
+     * Save the statistics to a xml file
+     * (slot so it can be triggered by a timer signal)
+     */
+    void saveStatistics();
+    /**
+     * Add incoming data to the current day, month and year
+     */
+    void addIncomingData( unsigned long data );
+    /**
+     * Add outgoing data to the current day, month and year
+     */
+    void addOutgoingData( unsigned long data );
+    /**
+     * Clear all entries of the day statistics
+     */
+    void clearDayStatistics();
+    /**
+     * Clear all entries of the month statistics
+     */
+    void clearMonthStatistics();
+    /**
+     * Clear all entries of the year statistics
+     */
+    void clearYearStatistics();
+
+private:
+    /**
+     * Make sure the current entry corresponds with the current date
+     */
+    void checkCurrentEntry();
+    /**
+     * Fill the statistics with a current entry
+     */
+    void initStatistics();
+    /**
+     * Check if the current day is in the day statistics. If found set
+     * mCurrentDay to the found entry else create a new one.
+     */
+    void updateCurrentDay();
+    /**
+     * Check if the current month is in the month statistics. If found set
+     * mCurrentMonth to the found entry else create a new one.
+     */
+    void updateCurrentMonth();
+    /**
+     * Check if the current year is in the year statistics. If found set
+     * mCurrentYear to the found entry else create a new one.
+     */
+    void updateCurrentYear();
+
+    QTimer* mSaveTimer;
+    Interface* mInterface;
+    StatisticEntry* mCurrentDay;
+    StatisticEntry* mCurrentMonth;
+    StatisticEntry* mCurrentYear;
+    StatisticsPtrList<StatisticEntry> mDayStatistics;
+    StatisticsPtrList<StatisticEntry> mMonthStatistics;
+    StatisticsPtrList<StatisticEntry> mYearStatistics;
+};
+
+#endif // INTERFACESTATISTICS_H