/*  -*- c++ -*-
 *    imagecollector.cpp
 *
 *    This file is part of KMail, the KDE mail client.
 *    Copyright (c) 2004 Marc Mutz <mutz@kde.org>
 *    Copyright (c) 2011 Torgny Nyblom <nyblom@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 "imagecollector.h"

#include "MessageCore/NodeHelper"

#include "messagecore_debug.h"
#include <kmime/kmime_content.h>

static bool isInExclusionList(KMime::Content *node)
{
    if (!node) {
        return true;
    }

    if (node->contentType()->mediaType() != "image") {
        return true;
    }

    if (node->contentType()->isMultipart()) {
        return true;
    }

    return false;
}

class Q_DECL_HIDDEN MessageCore::ImageCollector::Private
{
public:
    std::vector<KMime::Content *> mImages;
};

MessageCore::ImageCollector::ImageCollector()
    : d(new Private)
{
}

MessageCore::ImageCollector::~ImageCollector()
{
    delete d;
}

void MessageCore::ImageCollector::collectImagesFrom(KMime::Content *node)
{
    KMime::Content *parent = nullptr;

    while (node) {
        parent = node->parent();

        if (node->topLevel()->textContent() == node) {
            node = MessageCore::NodeHelper::next(node);
            continue;
        }

        if (isInExclusionList(node)) {
            node = MessageCore::NodeHelper::next(node);
            continue;
        }

        if (parent && parent->contentType()->isMultipart()
            && parent->contentType()->subType() == "related") {
            qCWarning(MESSAGECORE_LOG) << "Adding image" << node->contentID();
            d->mImages.push_back(node);
            node = MessageCore::NodeHelper::next(node);    // skip embedded images
            continue;
        }

        node = MessageCore::NodeHelper::next(node);
    }
}

const std::vector<KMime::Content *> &MessageCore::ImageCollector::images() const
{
    return d->mImages;
}
