Files
cantata/models/musiclibraryitemroot.cpp
Craig Drummond b6bd94c236 Update (c) year
2022-01-08 21:24:07 +00:00

777 lines
28 KiB
C++

/*
* Cantata
*
* Copyright (c) 2011-2022 Craig Drummond <craig.p.drummond@gmail.com>
*
*/
/*
* Copyright (c) 2008 Sander Knopper (sander AT knopper DOT tk) and
* Roeland Douma (roeland AT rullzer DOT com)
*
* This file is part of QtMPC.
*
* QtMPC 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.
*
* QtMPC 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 QtMPC. If not, see <http://www.gnu.org/licenses/>.
*/
#include "musiclibraryitemroot.h"
#include "musiclibraryitemartist.h"
#include "musiclibraryitemalbum.h"
#include "musiclibraryitemsong.h"
#include "musiclibrarymodel.h"
#include "mpd-interface/mpdparseutils.h"
#include "mpd-interface/mpdconnection.h"
#include "qtiocompressor/qtiocompressor.h"
#include <QXmlStreamReader>
#include <QXmlStreamWriter>
#include <QFile>
#include <QElapsedTimer>
//#define TIME_XML_FILE_LOADING
#ifdef TIME_XML_FILE_LOADING
#include <QDebug>
#endif
MusicLibraryItemArtist * MusicLibraryItemRoot::artist(const Song &s, bool create)
{
QString aa=songArtist(s);
MusicLibraryItemArtist *artistItem=getArtist(aa);
return artistItem ? artistItem : (create ? createArtist(s) : nullptr);
}
MusicLibraryItemArtist * MusicLibraryItemRoot::createArtist(const Song &s, bool forceComposer)
{
QString aa=songArtist(s, forceComposer);
MusicLibraryItemArtist *item=new MusicLibraryItemArtist(s, this);
m_indexes.insert(aa, m_childItems.count());
m_childItems.append(item);
return item;
}
void MusicLibraryItemRoot::refreshIndexes()
{
if (isFlat) {
return;
}
m_indexes.clear();
int i=0;
for (MusicLibraryItem *item: m_childItems) {
m_indexes.insert(item->data(), i++);
}
}
void MusicLibraryItemRoot::remove(MusicLibraryItemArtist *artist)
{
if (isFlat) {
return;
}
int index=m_childItems.indexOf(artist);
if (index<0 || index>=m_childItems.count()) {
return;
}
QHash<QString, int>::Iterator it=m_indexes.begin();
QHash<QString, int>::Iterator end=m_indexes.end();
for (; it!=end; ++it) {
if ((*it)>index) {
(*it)--;
}
}
m_indexes.remove(artist->data());
delete m_childItems.takeAt(index);
resetRows();
}
QSet<Song> MusicLibraryItemRoot::allSongs(bool revertVa) const
{
QSet<Song> songs;
for (const MusicLibraryItem *child: m_childItems) {
if (MusicLibraryItem::Type_Song==child->itemType()) {
if (revertVa) {
Song s=static_cast<const MusicLibraryItemSong *>(child)->song();
s.revertVariousArtists();
songs.insert(s);
} else {
songs.insert(static_cast<const MusicLibraryItemSong *>(child)->song());
}
} else {
for (const MusicLibraryItem *album: static_cast<const MusicLibraryItemContainer *>(child)->childItems()) {
for (const MusicLibraryItem *song: static_cast<const MusicLibraryItemContainer *>(album)->childItems()) {
if (revertVa) {
Song s=static_cast<const MusicLibraryItemSong *>(song)->song();
s.revertVariousArtists();
songs.insert(s);
} else {
songs.insert(static_cast<const MusicLibraryItemSong *>(song)->song());
}
}
}
}
}
return songs;
}
void MusicLibraryItemRoot::getDetails(QSet<QString> &artists, QSet<QString> &albumArtists, QSet<QString> &composers, QSet<QString> &albums, QSet<QString> &genres)
{
for (const MusicLibraryItem *child: m_childItems) {
if (MusicLibraryItem::Type_Song==child->itemType()) {
const Song &s=static_cast<const MusicLibraryItemSong *>(child)->song();
artists.insert(s.artist);
albumArtists.insert(s.albumArtist());
composers.insert(s.composer());
albums.insert(s.album);
for (int i=0; i<Song::constNumGenres && !s.genres[i].isEmpty(); ++i) {
genres+=s.genres[i];
}
} else if (MusicLibraryItem::Type_Artist==child->itemType()) {
for (const MusicLibraryItem *album: static_cast<const MusicLibraryItemContainer *>(child)->childItems()) {
for (const MusicLibraryItem *song: static_cast<const MusicLibraryItemContainer *>(album)->childItems()) {
const Song &s=static_cast<const MusicLibraryItemSong *>(song)->song();
artists.insert(s.artist);
albumArtists.insert(s.albumArtist());
composers.insert(s.composer());
albums.insert(s.album);
for (int i=0; i<Song::constNumGenres && !s.genres[i].isEmpty(); ++i) {
genres+=s.genres[i];
}
}
}
}
}
}
void MusicLibraryItemRoot::updateSongFile(const Song &from, const Song &to)
{
if (isFlat) {
return;
}
MusicLibraryItemArtist *art=artist(from, false);
if (art) {
MusicLibraryItemAlbum *alb=art->album(from, false);
if (alb) {
for (MusicLibraryItem *song: alb->childItems()) {
if (static_cast<MusicLibraryItemSong *>(song)->file()==from.file) {
static_cast<MusicLibraryItemSong *>(song)->setFile(to.file);
return;
}
}
}
}
}
void MusicLibraryItemRoot::toXML(const QString &filename, MusicLibraryProgressMonitor *prog) const
{
if (isFlat) {
return;
}
// If saving device cache, and we have NO items, then remove cache file...
if (0==childCount()) {
if (QFile::exists(filename)) {
QFile::remove(filename);
}
return;
}
QFile file(filename);
QtIOCompressor compressor(&file);
compressor.setStreamFormat(QtIOCompressor::GzipFormat);
if (!compressor.open(QIODevice::WriteOnly)) {
return;
}
QXmlStreamWriter writer(&compressor);
toXML(writer, prog);
compressor.close();
}
static const quint32 constVersion=1;
static const QString constTopTag=QLatin1String("tagcache");
static const QString constTrackElement=QLatin1String("track");
static const QString constTitleAttribute=QLatin1String("title");
static const QString constSortAttribute=QLatin1String("sort");
static const QString constArtistAttribute=QLatin1String("artist");
static const QString constAlbumArtistAttribute=QLatin1String("albumartist");
static const QString constArtistSortAttribute=QLatin1String("artistsort");
static const QString constAlbumArtistSortAttribute=QLatin1String("albumartistsort");
static const QString constComposerAttribute=QLatin1String("composer");
static const QString constAlbumAttribute=QLatin1String("album");
static const QString constAlbumSortAttribute=QLatin1String("albumsort");
static const QString constTrackAttribute=QLatin1String("track");
static const QString constGenreAttribute=QLatin1String("genre");
static const QString constYearAttribute=QLatin1String("year");
static const QString constTimeAttribute=QLatin1String("time");
static const QString constDiscAttribute=QLatin1String("disc");
static const QString constMbAlbumIdAttribute=QLatin1String("mbalbumid");
static const QString constFileAttribute=QLatin1String("file");
static const QString constPlaylistAttribute=QLatin1String("playlist");
static const QString constGuessedAttribute=QLatin1String("guessed");
static const QString constVersionAttribute=QLatin1String("version");
static const QString constnumTracksAttribute=QLatin1String("num");
static const QString constTrueValue=QLatin1String("true");
void MusicLibraryItemRoot::toXML(QXmlStreamWriter &writer, MusicLibraryProgressMonitor *prog) const
{
if (isFlat) {
return;
}
quint64 total=0;
quint64 count=0;
int percent=0;
QElapsedTimer timer;
if (prog) {
prog->writeProgress(0.0);
timer.start();
}
writer.writeStartDocument();
//Start with the document
writer.writeStartElement(constTopTag);
writer.writeAttribute(constVersionAttribute, QString::number(constVersion));
for (const MusicLibraryItem *a: childItems()) {
for (const MusicLibraryItem *al: static_cast<const MusicLibraryItemArtist *>(a)->childItems()) {
total+=al->childCount();
if (prog && prog->wasStopped()) {
return;
}
}
}
writer.writeAttribute(constnumTracksAttribute, QString::number(total));
//Loop over all artist, albums and tracks.
for (const MusicLibraryItem *a: childItems()) {
const MusicLibraryItemArtist *artist = static_cast<const MusicLibraryItemArtist *>(a);
for (const MusicLibraryItem *al: artist->childItems()) {
if (prog && prog->wasStopped()) {
return;
}
const MusicLibraryItemAlbum *album = static_cast<const MusicLibraryItemAlbum *>(al);
for (const MusicLibraryItem *t: album->childItems()) {
const MusicLibraryItemSong *track = static_cast<const MusicLibraryItemSong *>(t);
const Song &song=track->song();
writer.writeStartElement(constTrackElement);
writer.writeAttribute(constFileAttribute, track->file());
if (!song.title.isEmpty()) {
writer.writeAttribute(constTitleAttribute, song.title);
}
if (0!=track->time()) {
writer.writeAttribute(constTimeAttribute, QString::number(track->time()));
}
if (track->track()) {
writer.writeAttribute(constTrackAttribute, QString::number(track->track()));
}
if (track->disc()) {
writer.writeAttribute(constDiscAttribute, QString::number(track->disc()));
}
if (!song.artist.isEmpty()) {
writer.writeAttribute(constArtistAttribute, song.artist);
}
if (!song.albumartist.isEmpty()) {
writer.writeAttribute(constAlbumArtistAttribute, song.albumartist);
}
if (!song.album.isEmpty()) {
writer.writeAttribute(constAlbumAttribute, song.album);
}
if (song.hasComposer()) {
writer.writeAttribute(constComposerAttribute, song.composer());
}
if (song.hasMbAlbumId()) {
writer.writeAttribute(constMbAlbumIdAttribute, song.mbAlbumId());
}
if (song.hasAlbumSort()) {
writer.writeAttribute(constAlbumSortAttribute, song.albumSort());
}
if (song.hasArtistSort()) {
writer.writeAttribute(constArtistSortAttribute, song.artistSort());
}
if (song.hasAlbumArtistSort()) {
writer.writeAttribute(constAlbumArtistSortAttribute, song.albumArtistSort());
}
QString trackGenre=track->song().genres[0];
for (int i=1; i<Song::constNumGenres && !track->song().genres[i].isEmpty(); ++i) {
trackGenre+=","+track->song().genres[i];
}
if (!trackGenre.isEmpty() && trackGenre!=Song::unknown()) {
writer.writeAttribute(constGenreAttribute, trackGenre);
}
if (Song::Playlist==song.type) {
writer.writeAttribute(constPlaylistAttribute, constTrueValue);
}
if (song.year) {
writer.writeAttribute(constYearAttribute, QString::number(song.year));
}
if (song.guessed) {
writer.writeAttribute(constGuessedAttribute, constTrueValue);
}
if (prog && !prog->wasStopped() && total>0) {
count++;
int pc=((count*100.0)/(total*1.0))+0.5;
if (pc!=percent && timer.elapsed()>=250) {
prog->writeProgress(pc);
timer.restart();
percent=pc;
}
}
writer.writeEndElement();
}
}
}
writer.writeEndElement();
writer.writeEndDocument();
}
bool MusicLibraryItemRoot::fromXML(const QString &filename, const QString &baseFolder, MusicLibraryProgressMonitor *prog, MusicLibraryErrorMonitor *em)
{
if (isFlat) {
return false;
}
#ifdef TIME_XML_FILE_LOADING
QElapsedTimer timer;
timer.start();
#endif
QFile file(filename);
QtIOCompressor compressor(&file);
compressor.setStreamFormat(QtIOCompressor::GzipFormat);
if (!compressor.open(QIODevice::ReadOnly)) {
return false;
}
QXmlStreamReader reader(&compressor);
bool rv=fromXML(reader, baseFolder, prog, em);
compressor.close();
#ifdef TIME_XML_FILE_LOADING
qWarning() << filename << timer.elapsed();
#endif
return rv;
}
bool MusicLibraryItemRoot::fromXML(QXmlStreamReader &reader, const QString &baseFolder, MusicLibraryProgressMonitor *prog, MusicLibraryErrorMonitor *em)
{
if (isFlat) {
return false;
}
quint64 total=0;
quint64 count=0;
int percent=0;
QElapsedTimer timer;
bool valid=false;
if (prog) {
prog->readProgress(0.0);
timer.start();
}
while (!reader.atEnd() && (!prog || !prog->wasStopped())) {
reader.readNext();
if (reader.error()) {
if (em) {
em->loadError(QObject::tr("Parse error loading cache file, please check your songs tags."));
}
} else if (reader.isStartElement()) {
QString element = reader.name().toString();
QXmlStreamAttributes attributes=reader.attributes();
if (constTopTag == element) {
quint32 version = attributes.value(constVersionAttribute).toString().toUInt();
if (version < constVersion) {
return false;
}
if (prog) {
total=attributes.value(constnumTracksAttribute).toString().toUInt();
}
valid = true;
} else if (valid && constTrackElement == element) {
Song song;
song.file=attributes.value(constFileAttribute).toString();
if (!baseFolder.isEmpty() && song.file.startsWith(baseFolder)) {
song.file=song.file.mid(baseFolder.length());
}
if (attributes.hasAttribute(constTitleAttribute)) {
song.title=attributes.value(constTitleAttribute).toString();
}
if (attributes.hasAttribute(constTimeAttribute)) {
song.time=attributes.value(constTimeAttribute).toString().toUInt();
}
if (attributes.hasAttribute(constTrackAttribute)) {
song.track=attributes.value(constTrackAttribute).toString().toUInt();
}
if (attributes.hasAttribute(constDiscAttribute)) {
song.disc=attributes.value(constDiscAttribute).toString().toUInt();
}
if (attributes.hasAttribute(constArtistAttribute)) {
song.artist=attributes.value(constArtistAttribute).toString();
}
if (attributes.hasAttribute(constAlbumArtistAttribute)) {
song.albumartist=attributes.value(constAlbumArtistAttribute).toString();
}
if (attributes.hasAttribute(constAlbumAttribute)) {
song.album=attributes.value(constAlbumAttribute).toString();
}
if (attributes.hasAttribute(constComposerAttribute)) {
song.setComposer(attributes.value(constComposerAttribute).toString());
}
if (attributes.hasAttribute(constMbAlbumIdAttribute)) {
song.setMbAlbumId(attributes.value(constMbAlbumIdAttribute).toString());
}
if (attributes.hasAttribute(constAlbumSortAttribute)) {
song.setAlbumSort(attributes.value(constAlbumSortAttribute).toString());
}
if (attributes.hasAttribute(constArtistSortAttribute)) {
song.setArtistSort(attributes.value(constArtistSortAttribute).toString());
}
if (attributes.hasAttribute(constAlbumArtistSortAttribute)) {
song.setAlbumArtistSort(attributes.value(constAlbumArtistSortAttribute).toString());
}
if (attributes.hasAttribute(constGenreAttribute)) {
QStringList genres=attributes.value(constGenreAttribute).toString().split(",", CANTATA_SKIP_EMPTY);
for (int i=0; i<Song::constNumGenres && i<genres.count(); ++i) {
song.addGenre(genres[i]);
}
}
if (attributes.hasAttribute(constPlaylistAttribute) && constTrueValue==attributes.value(constPlaylistAttribute).toString()) {
song.type=Song::Playlist;
}
if (attributes.hasAttribute(constYearAttribute)) {
song.disc=attributes.value(constYearAttribute).toString().toUInt();
}
if (attributes.hasAttribute(constGuessedAttribute) && constTrueValue==attributes.value(constGuessedAttribute).toString()) {
song.guessed=true;
}
song.populateSorts();
MusicLibraryItemAlbum *albumItem=artist(song)->album(song);
albumItem->append(new MusicLibraryItemSong(song, albumItem));
if (prog && !prog->wasStopped() && total>0) {
count++;
int pc=((count*100.0)/(total*1.0))+0.5;
if (pc!=percent && timer.elapsed()>=250) {
prog->readProgress(pc);
timer.restart();
percent=pc;
}
}
}
}
}
return valid;
}
void MusicLibraryItemRoot::add(const QSet<Song> &songs)
{
if (isFlat) {
return;
}
MusicLibraryItemArtist *artistItem = nullptr;
MusicLibraryItemAlbum *albumItem = nullptr;
for (const Song &s: songs) {
if (s.isEmpty()) {
continue;
}
if (!artistItem || (supportsAlbumArtist ? s.albumArtist()!=artistItem->data() : s.album!=artistItem->data())) {
artistItem = artist(s);
}
if (!albumItem || albumItem->parentItem()!=artistItem || s.album!=albumItem->data()) {
albumItem = artistItem->album(s);
}
albumItem->append(new MusicLibraryItemSong(s, albumItem));
}
}
void MusicLibraryItemRoot::clearItems()
{
qDeleteAll(m_childItems);
m_childItems.clear();
m_indexes.clear();
}
bool MusicLibraryItemRoot::update(const QSet<Song> &songs)
{
QSet<Song> currentSongs=allSongs();
QSet<Song> updateSongs=songs;
QSet<Song> removed=currentSongs-updateSongs;
QSet<Song> added=updateSongs-currentSongs;
bool updatedSongs=added.count()||removed.count();
for (const Song &s: removed) {
removeSongFromList(s);
}
for (const Song &s: added) {
addSongToList(s);
}
return updatedSongs;
}
const MusicLibraryItem * MusicLibraryItemRoot::findSong(const Song &s) const
{
if (isFlat) {
for (const MusicLibraryItem *songItem: childItems()) {
if (songItem->data()==s.displayTitle()) {
return songItem;
}
}
} else {
MusicLibraryItemArtist *artistItem = const_cast<MusicLibraryItemRoot *>(this)->artist(s, false);
if (artistItem) {
MusicLibraryItemAlbum *albumItem = artistItem->album(s, false);
if (albumItem) {
for (const MusicLibraryItem *songItem: albumItem->childItems()) {
if (songItem->data()==s.displayTitle() && static_cast<const MusicLibraryItemSong *>(songItem)->song().track==s.track &&
static_cast<const MusicLibraryItemSong *>(songItem)->song().disc==s.disc) {
return songItem;
}
}
}
}
}
return nullptr;
}
bool MusicLibraryItemRoot::songExists(const Song &s) const
{
const MusicLibraryItem *song=findSong(s);
if (song) {
return true;
}
if (!s.isVariousArtists()) {
Song mod(s);
mod.albumartist=Song::variousArtists();
}
return false;
}
bool MusicLibraryItemRoot::updateSong(const Song &orig, const Song &edit)
{
if (!m_model) {
return false;
}
if (isFlat) {
int songRow=0;
for (MusicLibraryItem *song: childItems()) {
if (static_cast<MusicLibraryItemSong *>(song)->song().file==orig.file) {
static_cast<MusicLibraryItemSong *>(song)->setSong(edit);
QModelIndex idx=m_model->createIndex(songRow, 0, song);
emit m_model->dataChanged(idx, idx);
return true;
}
songRow++;
}
} else if ((supportsAlbumArtist ? orig.albumArtist()==edit.albumArtist() : orig.artist==edit.artist) && orig.album==edit.album) {
MusicLibraryItemArtist *artistItem = artist(orig, false);
if (!artistItem) {
return false;
}
MusicLibraryItemAlbum *albumItem = artistItem->album(orig, false);
if (!albumItem) {
return false;
}
int songRow=0;
for (MusicLibraryItem *song: albumItem->childItems()) {
if (static_cast<MusicLibraryItemSong *>(song)->song().file==orig.file) {
static_cast<MusicLibraryItemSong *>(song)->setSong(edit);
bool yearUpdated=orig.year!=edit.year && albumItem->updateYear();
QModelIndex idx=m_model->createIndex(songRow, 0, song);
emit m_model->dataChanged(idx, idx);
if (yearUpdated) {
idx=m_model->createIndex(albumItem->row(), 0, albumItem);
emit m_model->dataChanged(idx, idx);
}
return true;
}
songRow++;
}
}
return false;
}
void MusicLibraryItemRoot::addSongToList(const Song &s)
{
if (!m_model || isFlat) {
return;
}
MusicLibraryItemArtist *artistItem = artist(s, false);
if (!artistItem) {
m_model->beginInsertRows(index(), childCount(), childCount());
artistItem = createArtist(s);
artistItem->setIsNew(true);
m_model->endInsertRows();
}
MusicLibraryItemAlbum *albumItem = artistItem->album(s, false);
if (!albumItem) {
m_model->beginInsertRows(m_model->createIndex(artistItem->row(), 0, artistItem), artistItem->childCount(), artistItem->childCount());
albumItem = artistItem->createAlbum(s);
albumItem->setIsNew(true);
m_model->endInsertRows();
if (!artistItem->isNew()) {
artistItem->setIsNew(true);
QModelIndex idx=m_model->createIndex(artistItem->row(), 0, artistItem);
emit m_model->dataChanged(idx, idx);
}
}
quint32 year=albumItem->year();
for (const MusicLibraryItem *songItem: albumItem->childItems()) {
if (static_cast<const MusicLibraryItemSong *>(songItem)->song().file==s.file) {
return;
}
}
m_model->beginInsertRows(m_model->createIndex(albumItem->row(), 0, albumItem), albumItem->childCount(), albumItem->childCount());
MusicLibraryItemSong *songItem = new MusicLibraryItemSong(s, albumItem);
albumItem->append(songItem);
m_model->endInsertRows();
if (!artistItem->isNew()) {
artistItem->setIsNew(true);
QModelIndex idx=m_model->createIndex(artistItem->row(), 0, artistItem);
emit m_model->dataChanged(idx, idx);
}
if (!albumItem->isNew()) {
albumItem->setIsNew(true);
QModelIndex idx=m_model->createIndex(albumItem->row(), 0, albumItem);
emit m_model->dataChanged(idx, idx);
} else if (year!=albumItem->year()) {
QModelIndex idx=m_model->createIndex(albumItem->row(), 0, albumItem);
emit m_model->dataChanged(idx, idx);
}
}
void MusicLibraryItemRoot::removeSongFromList(const Song &s)
{
if (!m_model || isFlat) {
return;
}
MusicLibraryItemArtist *artistItem = artist(s, false);
if (!artistItem) {
return;
}
MusicLibraryItemAlbum *albumItem = artistItem->album(s, false);
if (!albumItem) {
return;
}
MusicLibraryItem *songItem=nullptr;
int songRow=0;
for (MusicLibraryItem *song: albumItem->childItems()) {
if (static_cast<MusicLibraryItemSong *>(song)->song().file==s.file) {
songItem=song;
break;
}
songRow++;
}
if (!songItem) {
return;
}
if (1==artistItem->childCount() && 1==albumItem->childCount()) {
// 1 album with 1 song - so remove whole artist
int row=artistItem->row();
m_model->beginRemoveRows(index(), row, row);
remove(artistItem);
m_model->endRemoveRows();
return;
}
if (1==albumItem->childCount()) {
// multiple albums, but this album only has 1 song - remove album
int row=albumItem->row();
m_model->beginRemoveRows(m_model->createIndex(artistItem->row(), 0, artistItem), row, row);
artistItem->remove(albumItem);
m_model->endRemoveRows();
return;
}
// Just remove particular song
m_model->beginRemoveRows(m_model->createIndex(albumItem->row(), 0, albumItem), songRow, songRow);
quint32 year=albumItem->year();
albumItem->remove(songRow);
m_model->endRemoveRows();
if (year!=albumItem->year()) {
QModelIndex idx=m_model->createIndex(albumItem->row(), 0, albumItem);
emit m_model->dataChanged(idx, idx);
}
}
QString MusicLibraryItemRoot::artistName(const Song &s, bool forceComposer)
{
if (Song::Standard==s.type || Song::Cdda==s.type || Song::OnlineSvrTrack==s.type || (Song::Playlist==s.type && !s.albumArtist().isEmpty())) {
return forceComposer && s.hasComposer() ? s.composer() : s.albumArtistOrComposer();
}
return Song::variousArtists();
}
QString MusicLibraryItemRoot::songArtist(const Song &s, bool forceComposer) const
{
if (isFlat || !supportsAlbumArtist) {
return s.artist;
}
return artistName(s, forceComposer);
}
MusicLibraryItemArtist * MusicLibraryItemRoot::getArtist(const QString &key) const
{
if (m_indexes.count()==m_childItems.count()) {
if (m_childItems.isEmpty()) {
return nullptr;
}
QHash<QString, int>::ConstIterator idx=m_indexes.find(key);
if (m_indexes.end()==idx) {
return nullptr;
}
// Check index value is within range
if (*idx>=0 && *idx<m_childItems.count()) {
MusicLibraryItemArtist *a=static_cast<MusicLibraryItemArtist *>(m_childItems.at(*idx));
// Check id actually matches!
if (a->data()==key) {
return a;
}
}
}
// Something wrong with m_indexes??? So, refresh them...
MusicLibraryItemArtist *ar=nullptr;
m_indexes.clear();
QList<MusicLibraryItem *>::ConstIterator it=m_childItems.constBegin();
QList<MusicLibraryItem *>::ConstIterator end=m_childItems.constEnd();
for (int i=0; it!=end; ++it, ++i) {
MusicLibraryItemArtist *currenArtist=static_cast<MusicLibraryItemArtist *>(*it);
if (!ar && currenArtist->data()==key) {
ar=currenArtist;
}
m_indexes.insert(currenArtist->data(), i);
}
return ar;
}