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/***************************************************************************
* Copyright (C) 2015 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef METADATAFORMATTER_H
#define METADATAFORMATTER_H
#include <QString>
#include <QMap>
#include <QList>
#include <qmmpui/playlisttrack.h>
#include <qmmp/qmmp.h>
/*! @brief The MetaDataFormatter formats metadata using templates.
* @author Ilya Kotov <forkotov02@hotmail.ru>
*/
class MetaDataFormatter
{
public:
/*!
* Constructor.
* @param pattern Metadata template.
* Syntax:
* %p - artist,
* %a - album,
* %aa - album artist,
* %t - title,
* %n - track number,
* %NN - 2-digit track number,
* %g - genre,
* %c - comment,
* %C - composer,
* %D - disc number,
* %f - file name,
* %F - full path,
* %y - year,
* %l - duration,
* %if(A,B,C) or %if(A&B&C,D,E) - condition.
*/
MetaDataFormatter(const QString &pattern = QString());
void setPattern(const QString &pattern);
const QString pattern() const;
/*!
* Converts metadata of item \b item to one string using template.
*/
QString format(const PlayListTrack *item) const;
/*!
* Converts metadata to one string using template.
* @param metaData Metadata array.
* @param length Length in seconds.
*/
QString format(const QMap<Qmmp::MetaData, QString> &metaData, qint64 length = 0) const;
/*!
* Returns formatted length (example: 05:02:03).
* \param length Length in seconds.
*/
QString formatLength(qint64 length) const;
private:
struct Node;
struct Param;
struct Node
{
enum {
PRINT_TEXT = 0,
IF_KEYWORD,
OR_OPERATOR,
AND_OPERATOR
} command;
QList<Param> params;
};
struct Param
{
enum {
FIELD = 0,
TEXT,
NODES
} type;
//extra fields
enum
{
TWO_DIGIT_TRACK = Qmmp::URL + 1,
DURATION,
FILE_NAME
};
int field;
QString text;
QList<Node> children;
};
bool parseField(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
bool parseIf(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
void parseText(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
void parseEscape(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
QString evalute(const QList<Node> *nodes, const QMap<Qmmp::MetaData, QString> *metaData, qint64 length) const;
QString printParam(Param *p, const QMap<Qmmp::MetaData, QString> *metaData, qint64 length) const;
QString printField(int field, const QMap<Qmmp::MetaData, QString> *metaData, qint64 length) const;
QString dumpNode(Node node) const;
QList<MetaDataFormatter::Node> compile(const QString &expr);
QString m_pattern;
QList<MetaDataFormatter::Node> m_nodes;
QMap<QString, int> m_fieldNames;
};
#endif // METADATAFORMATTER2_H
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