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/*
Copyright (C) 2006-2010 Tuomas Suutari <thsuut@utu.fi>
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 (see the file COPYING); if not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA.
*/
#include "SQLImageInfoCollection.h"
#include "DB/ImageSearchInfo.h"
#include "SQLImageInfo.h"
#include "QueryErrors.h"
#include <QList>
using namespace SQLDB;
SQLImageInfoCollection::SQLImageInfoCollection(QueryHelper& queryHelper):
_qh(queryHelper),
_lockingScope(0)
{
QList< QPair<DB::RawId, QString> > l = _qh.mediaItemIdFileMap();
for (QList< QPair<DB::RawId, QString> >::const_iterator i = l.constBegin();
i != l.constEnd(); ++i) {
_filenameIdMap.insert((*i).second, (*i).first);
_idFilenameMap.insert((*i).first, (*i).second);
}
}
SQLImageInfoCollection::~SQLImageInfoCollection()
{
unsetLock();
// FIXME: shouldn't be needed?
clearCache();
}
DB::ImageInfoPtr
SQLImageInfoCollection::getImageInfoOf(const QString& relativeFilename) const
{
DB::RawId rawId = _filenameIdMap[relativeFilename];
if (rawId == DB::RawId()) {
try {
rawId = _qh.mediaItemId(relativeFilename);
Q_ASSERT(rawId != DB::RawId());
}
catch (NotFoundError& e) {
return DB::ImageInfoPtr(0);
}
_filenameIdMap.insert(relativeFilename, rawId);
}
// QMutexLocker locker(&_mutex);
DB::ImageInfoPtr p = _infoPointers[rawId];
if (!p) {
// TODO: Use real context for prefetching
// make a dummy prefetch list
QList<DB::RawId> prefetchIdList;
prefetchIdList << rawId;
typedef QMap<DB::RawId, DB::ImageInfoPtr> IdInfoMap;
const IdInfoMap fileInfos = _qh.getInfosOfFiles(prefetchIdList);
p = fileInfos[rawId];
for (IdInfoMap::const_iterator i = fileInfos.begin(); i != fileInfos.end(); ++i) {
_infoPointers.insert(i.key(), i.value());
setLocking(i.value());
}
}
return p;
}
DB::ImageInfoPtr SQLImageInfoCollection::getImageInfoOf(const DB::Id& id) const
{
Q_ASSERT(!id.isNull());
const int prefetchWindowSize = 1000;
// QMutexLocker locker(&_mutex);
DB::ImageInfoPtr p = _infoPointers[id.rawId()];
if (!p) {
QList<DB::RawId> prefetchIdList;
const DB::IdList context = id.context();
if (!context.isEmpty()) {
const int contextSize = context.size();
const int rawIdIndex = context.indexOf(id);
const int firstIndex =
qMax(0, rawIdIndex - prefetchWindowSize / 2);
const int onePastLastIndex =
qMin(contextSize, rawIdIndex + prefetchWindowSize / 2);
Q_ASSERT(firstIndex < onePastLastIndex);
for (int i = firstIndex; i < onePastLastIndex; ++i) {
prefetchIdList.push_back(context.at(i).rawId());
}
}
else {
prefetchIdList.push_back(id.rawId());
}
typedef QMap<DB::RawId, DB::ImageInfoPtr> IdInfoMap;
const IdInfoMap fileInfos = _qh.getInfosOfFiles(prefetchIdList);
p = fileInfos[id.rawId()];
for (IdInfoMap::const_iterator i = fileInfos.begin(); i != fileInfos.end(); ++i) {
_infoPointers.insert(i.key(), i.value());
setLocking(i.value());
}
}
return p;
}
QString SQLImageInfoCollection::filenameForId(DB::RawId id) const
{
QString filename = _idFilenameMap[id];
if (filename.isNull()) {
try {
filename = _qh.mediaItemFilename(id);
}
catch (NotFoundError& e) {
return QString();
}
_idFilenameMap.insert(id, filename);
}
return filename;
}
void SQLImageInfoCollection::setLock(const DB::ImageSearchInfo& scope, bool invert)
{
unsetLock();
_lockingScope = new DB::ImageSearchInfo(scope);
_invertLock = invert;
updateLockingInfo();
// TODO: some other way to prevent locked images to show up in searches
}
void SQLImageInfoCollection::unsetLock()
{
if (_lockingScope) {
delete _lockingScope;
_lockingScope = 0;
updateLockingInfo();
}
}
void SQLImageInfoCollection::clearCache()
{
// QMutexLocker locker(&_mutex);
for (QMap<DB::RawId, DB::ImageInfoPtr>::iterator i = _infoPointers.begin();
i != _infoPointers.end();) {
// Check if only _infoPointers has reference to the pointer.
if ((*i).count() == 1) {
// Then it's not needed anymore, because new one could be
// created easily by loading from the SQL database.
i = _infoPointers.erase(i);
}
else
++i;
}
}
void SQLImageInfoCollection::deleteTag(DB::Category* category,
const QString& item)
{
if (category) {
// QMutexLocker locker(&_mutex);
for (QMap<DB::RawId, DB::ImageInfoPtr>::iterator i = _infoPointers.begin();
i != _infoPointers.end(); ++i)
(*i)->removeCategoryInfo(category->name(), item);
}
}
void SQLImageInfoCollection::renameTag(DB::Category* category,
const QString& oldName,
const QString& newName)
{
if (category) {
// QMutexLocker locker(&_mutex);
for (QMap<DB::RawId, DB::ImageInfoPtr>::iterator i = _infoPointers.begin();
i != _infoPointers.end(); ++i)
(*i)->renameItem(category->name(), oldName, newName);
}
}
void SQLImageInfoCollection::setLocking(DB::ImageInfoPtr p) const
{
if (_lockingScope)
p->setLocked(_lockingScope->match(p) ^ _invertLock);
else
p->setLocked(false);
}
void SQLImageInfoCollection::updateLockingInfo() const
{
for (QMap<DB::RawId, DB::ImageInfoPtr>::iterator i = _infoPointers.begin();
i != _infoPointers.end(); ++i)
setLocking(*i);
}
#include "SQLImageInfoCollection.moc"
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