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/***************************************************************************
* Copyright (C) 2015-2021 by Ilya Kotov *
* forkotov02@ya.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 <QHash>
#include <QList>
#include <qmmpui/playlisttrack.h>
#include <qmmp/qmmp.h>
#include "qmmpui_export.h"
/*! @brief The MetaDataFormatter formats metadata using templates.
* @author Ilya Kotov <forkotov02@ya.ru>
*/
class QMMPUI_EXPORT 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,
* %I - track index,
* %{bitrate} - bitrate,
* %{samplerate} - sample rate,
* %{channels} - number of channels,
* %{samplesize} - bits per sample,
* %{format} - format name,
* %{decoder} - decoder name,
* %{filesize} - file size,
* %if(A,B,C) or %if(A&B&C,D,E) - condition,
* %dir(n) - Name of the directory located on \b n levels above.
*/
MetaDataFormatter(const QString &pattern = QString());
/*!
* Setups metadata template.
* @param pattern Metadata template string.
*/
void setPattern(const QString &pattern);
/*!
* Returns metadata template.
*/
const QString pattern() const;
/*!
* Converts metadata of item \b item to one string using template.
*/
QString format(const PlayListTrack *item) const;
/*!
* Converts metadata of \b TrackInfo reference \b info to one string using template.
* \param info pointer to \b TrackInfo object.
* \param trackIndex Index of track.
*/
QString format(const TrackInfo &info, int trackIndex = 0) const;
/*!
* Converts metadata of \b TrackInfo pointer \b info to one string using template.
* \param info pointer to \b TrackInfo object.
* \param trackIndex Index of track.
*/
QString format(const TrackInfo *info, int trackIndex = 0) const;
/*!
* Returns formatted duration (example: 05:02:03).
* \param duration Duration in milliseconds.
* \param hideZero Setting for zero values output.
* If \b hideZero is \b true, then the function outputs empty string for zero length,
* otherwise outputs "0:00".
* \param showMs Adds milliseconds to the end of output (example: 05:02:03.324).
*/
static QString formatDuration(qint64 duration, bool hideZero = true, bool showMs = false);
private:
struct Node;
struct Param;
struct Node
{
enum {
PRINT_TEXT = 0,
IF_KEYWORD,
OR_OPERATOR,
AND_OPERATOR,
DIR_FUNCTION
} command;
QList<Param> params;
};
struct Param
{
enum {
FIELD = 0,
PROPERTY,
TEXT,
NUMERIC,
NODES
} type;
//extra fields
enum
{
PATH = Qmmp::DISCNUMBER + 1,
TWO_DIGIT_TRACK,
DURATION,
FILE_NAME,
TRACK_INDEX
};
int field;
QString text;
int number;
QList<Node> children;
};
bool parseField(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
bool parseProperty(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
bool parseIf(QList<Node> *nodes, QString::const_iterator *i, QString::const_iterator end);
bool parseDir(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 TrackInfo *info, int trackIndex) const;
QString printParam(Param *p, const TrackInfo *info, int trackIndex) const;
QString printField(int field, const TrackInfo *info, int trackIndex) const;
QString printProperty(int field, const TrackInfo *info) const;
QString dumpNode(Node node) const;
QList<MetaDataFormatter::Node> compile(const QString &expr);
QString m_pattern;
QList<MetaDataFormatter::Node> m_nodes;
QHash<QString, int> m_fieldNames;
QHash<QString, int> m_propertyNames;
};
#endif // METADATAFORMATTER2_H
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