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/**
* Copyright (C) 2004 Michael Pyne <mpyne@kde.org>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "tagtransactionmanager.h"
#include <KMessageBox>
#include <KLocalizedString>
#include <QAction>
#include <QApplication>
#include <QDir>
#include <QFileInfo>
#include "playlistitem.h"
#include "collectionlist.h"
#include "juktag.h"
#include "actioncollection.h"
#include "juk_debug.h"
using ActionCollection::action;
Q_GLOBAL_STATIC(TagTransactionManager, g_tagManager)
TagTransactionManager *TagTransactionManager::instance()
{
return g_tagManager;
}
TagTransactionAtom::TagTransactionAtom(PlaylistItem *item, Tag *tag)
: m_item(item)
, m_tag(tag)
{
}
void TagTransactionManager::changeTagOnItem(PlaylistItem *item, Tag *newTag)
{
if(!item) {
qCWarning(JUK_LOG) << "Trying to change tag on null PlaylistItem.\n";
return;
}
// Save the CollectionListItem, as it is the most likely to survive long
// enough for the commit(). I should probably intercept the item deleted
// signals from CollectionList to ensure that the commit list and the
// playlists stay in sync.
m_list.emplace_back(item->collectionItem(), newTag);
}
Tag *TagTransactionManager::duplicateTag(const Tag *tag, const QString &fileName)
{
Q_ASSERT(tag);
QString name = fileName.isEmpty() ? tag->fileName() : fileName;
Tag *newTag = new Tag(*tag);
newTag->setFileName(name);
return newTag;
}
bool TagTransactionManager::commit()
{
m_undoList.clear();
bool result = processChangeList();
m_list.clear();
return result;
}
void TagTransactionManager::forget()
{
m_list.clear();
}
bool TagTransactionManager::undo()
{
qCDebug(JUK_LOG) << "Undoing " << m_undoList.size() << " changes.\n";
forget(); // Scrap our old changes (although the list should be empty anyway).
bool result = processChangeList(true);
m_undoList.clear();
action("edit_undo")->setEnabled(false);
return result;
}
bool TagTransactionManager::renameFile(const QFileInfo &from, const QFileInfo &to) const
{
if(!QFileInfo(to.path()).isWritable() || !from.exists())
return false;
if(!to.exists() ||
KMessageBox::warningContinueCancel(
static_cast<QWidget *>(parent()),
i18n("This file already exists.\nDo you want to replace it?"),
i18nc("@title:window", "File Exists"), KGuiItem(i18nc("@action:button", "Replace"))) == KMessageBox::Continue)
{
qCDebug(JUK_LOG) << "Renaming " << from.absoluteFilePath() << " to " << to.absoluteFilePath();
QDir currentDir;
return currentDir.rename(from.absoluteFilePath(), to.absoluteFilePath());
}
return false;
}
bool TagTransactionManager::processChangeList(bool undo)
{
TagAlterationList::const_iterator it, end;
QStringList errorItems;
it = undo ? m_undoList.cbegin() : m_list.cbegin();
end = undo ? m_undoList.cend() : m_list.cend();
emit signalAboutToModifyTags();
for(; it != end; ++it) {
PlaylistItem *item = (*it).item();
const Tag *tag = (*it).tag();
QFileInfo newFile(tag->fileName());
if(item->file().fileInfo().fileName() != newFile.fileName()) {
if(!renameFile(item->file().fileInfo(), newFile)) {
errorItems.append(item->text(1) + QString(" - ") + item->text(0));
continue;
}
}
if(tag->save()) {
if(!undo)
m_undoList.emplace_back(item, duplicateTag(item->file().tag()));
item->setFile(tag->fileName());
item->refreshFromDisk();
//FIXME repaint
//item->repaint();
item->playlist()->playlistItemsChanged();
item->playlist()->update();
}
else {
Tag *errorTag = item->file().tag();
QString str = errorTag->artist() + " - " + errorTag->title();
if(errorTag->artist().isEmpty())
str = errorTag->title();
errorItems.append(str);
}
qApp->processEvents();
}
undo ? m_undoList.clear() : m_list.clear();
if(!undo && !m_undoList.empty())
action("edit_undo")->setEnabled(true);
else
action("edit_undo")->setEnabled(false);
if(!errorItems.isEmpty())
KMessageBox::errorList(static_cast<QWidget *>(parent()),
i18n("The following files were unable to be changed."),
errorItems,
i18nc("@title:window", "Error"));
emit signalDoneModifyingTags();
return errorItems.isEmpty();
}
// vim: set et sw=4 tw=0 sta:
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