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/****************************************************************************************
* Copyright (c) 2010 Sergey Ivanov <123kash@gmail.com> *
* *
* 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 "TagsFromFileNameGuesser.h"
#include <QRegularExpression>
#include <QStringList>
const QStringList m_schemes( QStringList()
//01 Artist - Title.ext
<< QStringLiteral("^%track%\\W*-?\\W*%artist%\\W*-\\W*%title%\\.+(?:\\w{2,5})$")
//01 Title.ext
<< QStringLiteral("^%track%\\W*-?\\W*%title%\\.+?:\\w{2,5}$")
//Album - 01 - Artist - Title.ext
<< QStringLiteral("^%album%\\W*-\\W*%track%\\W*-\\W*%artist%\\W*-\\W*%title%\\.+(?:\\w{2,5})$")
//Artist - Album - 01 - Title.ext
<< QStringLiteral("^%artist%\\W*-\\W*%album%\\W*-\\W*%track%\\W*-\\W*%title%\\.+(?:\\w{2,5})$")
// Artist - Album - Title.ext
<< QStringLiteral("^%artist%\\W*-\\W*%album%\\W*-\\W*%title%\\.+(?:\\w{2,5})$")
//Artist - Title.ext
<< QStringLiteral("^%artist%\\W*-\\W*%title%\\.+(?:\\w{2,5})$")
//Title.ext
<< QStringLiteral("^%title%\\.+(?:\\w{2,5})$")
);
const QRegularExpression m_digitalFields( QStringLiteral("(%(?:discnumber|track|year)%)") );
const QRegularExpression m_literalFields( QStringLiteral("(%(?:album|albumartist|artist|comment|composer|genre|title)%)") );
quint64
fieldName( const QString &field )
{
if( field == QLatin1String("album") )
return Meta::valAlbum;
else if( field == QLatin1String("albumartist") )
return Meta::valAlbumArtist;
else if( field == QLatin1String("artist") )
return Meta::valArtist;
else if( field == QLatin1String("comment") )
return Meta::valComment;
else if( field == QLatin1String("composer") )
return Meta::valComposer;
else if( field == QLatin1String("discnumber") )
return Meta::valDiscNr;
else if( field == QLatin1String("genre") )
return Meta::valGenre;
else if( field == QLatin1String("title") )
return Meta::valTitle;
else if( field == QLatin1String("track") )
return Meta::valTrackNr;
else if( field == QLatin1String("year") )
return Meta::valYear;
return 0;
}
QList< qint64 >
parseTokens( const QString &scheme )
{
QRegularExpression rxm( QStringLiteral("%(\\w+)%") );
QList< qint64 > tokens;
int pos = 0;
qint64 field;
while( ( pos = scheme.indexOf( rxm, pos ) ) != -1 )
{
QRegularExpressionMatch rmatch = rxm.match( scheme, pos );
field = fieldName( rmatch.captured( 1 ) );
if( field )
tokens << field;
pos += rmatch.capturedLength();
}
return tokens;
}
Meta::FieldHash
Meta::Tag::TagGuesser::guessTagsByScheme( const QString &fileName, const QString &scheme,
bool cutTrailingSpaces, bool convertUnderscores,
bool isRegExp )
{
Meta::FieldHash metadata;
QRegularExpression rx;
QString m_fileName = fileName;
QString m_scheme = scheme;
QList< qint64 > tokens = parseTokens( m_scheme );
// Screen all special symbols
if( !isRegExp )
m_scheme = m_scheme.replace( QRegularExpression( QStringLiteral("([~!\\^&*()\\-+\\[\\]{}\\\\:\"?\\.])" )), QStringLiteral("\\\\1") );
QRegularExpression spaces( QStringLiteral("(\\s+)") );
rx.setPattern( m_scheme.replace( spaces, QStringLiteral("\\s+") )
.replace( m_digitalFields, QStringLiteral("(\\d+)") )
.replace( m_literalFields, QStringLiteral("(.+)") )
.replace( QLatin1String("%ignore%"), QLatin1String("(?:.+)") ) );
QRegularExpressionMatch rmatch = QRegularExpression(QRegularExpression::anchoredPattern(rx.pattern())).match( m_fileName );
if( !rmatch.hasMatch() )
return metadata;
QString value;
for( int i = 0; i < tokens.count(); i++ )
{
value = rmatch.captured( i + 1 );
if( convertUnderscores )
value.replace( QLatin1Char('_'), QLatin1Char(' ') );
if( cutTrailingSpaces )
value = value.trimmed();
metadata.insert( tokens[i], value );
}
return metadata;
}
Meta::FieldHash
Meta::Tag::TagGuesser::guessTags( const QString &fileName )
{
QString tmpStr = fileName;
int pos = 0;
if( ( pos = fileName.lastIndexOf( QLatin1Char('/') ) ) != -1 )
tmpStr = fileName.mid( pos + 1 );
for( const auto &scheme : m_schemes )
{
Meta::FieldHash metadata = guessTagsByScheme( tmpStr, scheme, true, true, true );
if( !metadata.isEmpty() )
return metadata;
}
return Meta::FieldHash();
}
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