File indexing completed on 2025-01-19 03:55:57

 /* ============================================================
  *
  * This file is a part of digiKam project
  * https://www.digikam.org
  *
  * Date        : 2006-02-23
  * Description : item metadata interface - history helpers.
  *
  * SPDX-FileCopyrightText: 2006-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
  * SPDX-FileCopyrightText: 2006-2013 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
  * SPDX-FileCopyrightText: 2011      by Leif Huhn <leif at dkstat dot com>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  * ============================================================ */
 
 #include "dmetadata.h"
 
 // Local includes
 
 #include "metaenginesettings.h"
 #include "digikam_version.h"
 #include "digikam_globals.h"
 #include "digikam_debug.h"
 
 namespace Digikam
 {
 
 bool DMetadata::setItemHistory(const QString& imageHistoryXml) const
 {
     if (supportXmp())
     {
         if (!setXmpTagString("Xmp.digiKam.ImageHistory", imageHistoryXml))
         {
             return false;
         }
         else
         {
             return true;
         }
     }
 
     return false;
 }
 
 QString DMetadata::getItemHistory() const
 {
     if (hasXmp())
     {
         QString value = getXmpTagString("Xmp.digiKam.ImageHistory", false);
 /*
         qCDebug(DIGIKAM_METAENGINE_LOG) << "Loading image history " << value;
 */
         return value;
     }
 
     return QString();
 }
 
 bool DMetadata::hasItemHistoryTag() const
 {
     if (hasXmp())
     {
         if (QString(getXmpTagString("Xmp.digiKam.ImageHistory", false)).length() > 0)
         {
             return true;
         }
         else
         {
             return false;
         }
     }
 
     return false;
 }
 
 QString DMetadata::getItemUniqueId() const
 {
     QString exifUid;
 
     if (hasXmp())
     {
         QString uuid = getXmpTagString("Xmp.digiKam.ImageUniqueID");
 
         if (!uuid.isEmpty())
         {
             return uuid;
         }
 
         exifUid = getXmpTagString("Xmp.exif.ImageUniqueId");
     }
 
     if (exifUid.isEmpty())
     {
         exifUid = getExifTagString("Exif.Photo.ImageUniqueID");
     }
 
     // same makers may choose to use a "click counter" to generate the id,
     // which is then weak and not a universally unique id
     // The Exif ImageUniqueID is 128bit, or 32 hex digits.
     // If the first 20 are zero, it's probably a counter,
     // the left 12 are sufficient for more then 10^14 clicks.
 
     if (!exifUid.isEmpty()                                         &&
         !exifUid.startsWith(QLatin1String("00000000000000000000")) &&
         !getExifTagString("Exif.Image.Make").contains(QLatin1String("SAMSUNG"), Qt::CaseInsensitive))
     {
         return exifUid;
     }
 
     // Exif.Image.ImageID can also be a pathname, so it's not sufficiently unique
 
     QString dngUid = getExifTagString("Exif.Image.RawDataUniqueID");
 
     if (!dngUid.isEmpty())
     {
         return dngUid;
     }
 
     return QString();
 }
 
 bool DMetadata::setItemUniqueId(const QString& uuid) const
 {
     if (supportXmp())
     {
         return setXmpTagString("Xmp.digiKam.ImageUniqueID", uuid);
     }
 
     return false;
 }
 
 } // namespace Digikam