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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This file copyright 2007 QMUL.
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. See the file
COPYING included with this distribution for more information.
*/
#include "PlaylistFileReader.h"
#include <QFile>
#include <QTextStream>
#include <QStringList>
#include <QFileInfo>
#include <QDir>
#include <iostream>
namespace sv {
PlaylistFileReader::PlaylistFileReader(QString path) :
m_source(path),
m_file(nullptr)
{
if (!m_source.isAvailable()) {
m_error = QFile::tr("File or URL \"%1\" could not be retrieved")
.arg(path);
return;
}
init();
}
PlaylistFileReader::PlaylistFileReader(FileSource source) :
m_source(source),
m_file(nullptr)
{
if (!m_source.isAvailable()) {
m_error = QFile::tr("File or URL \"%1\" could not be retrieved")
.arg(source.getLocation());
return;
}
init();
}
PlaylistFileReader::~PlaylistFileReader()
{
if (m_file) m_file->close();
delete m_file;
}
void
PlaylistFileReader::init()
{
if (!m_source.isAvailable()) return;
m_source.waitForData();
QString filename = m_source.getLocalFilename();
m_file = new QFile(filename);
bool good = false;
if (!m_file->exists()) {
m_error = QFile::tr("File \"%1\" does not exist")
.arg(m_source.getLocation());
} else if (!m_file->open(QIODevice::ReadOnly | QIODevice::Text)) {
m_error = QFile::tr("Failed to open file \"%1\"")
.arg(m_source.getLocation());
} else {
good = true;
}
if (good) {
if (!m_source.isRemote()) {
m_basedir = QFileInfo(filename).dir().canonicalPath();
}
}
if (!good) {
delete m_file;
m_file = nullptr;
}
}
bool
PlaylistFileReader::isOK() const
{
return (m_file != nullptr);
}
QString
PlaylistFileReader::getError() const
{
return m_error;
}
PlaylistFileReader::Playlist
PlaylistFileReader::load() const
{
if (!m_file) return Playlist();
QTextStream in(m_file);
in.seek(0);
Playlist playlist;
while (!in.atEnd()) {
// cope with old-style Mac line endings (c.f. CSVFileReader)
// as well as DOS/Unix style
QString chunk = in.readLine();
QStringList lines = chunk.split('\r', Qt::SkipEmptyParts);
for (int li = 0; li < lines.size(); ++li) {
QString line = lines[li];
if (line.startsWith("#")) continue;
// line is expected to be a URL or a file path. If it
// appears to be a local relative file path, then we
// should check whether it can be resolved relative to the
// location of the playlist file and, if so, do so.
if (!FileSource::isRemote(line)) {
if (QFileInfo(line).isRelative() && m_basedir != "") {
QString testpath = QDir(m_basedir).filePath(line);
if (QFileInfo(testpath).exists() &&
QFileInfo(testpath).isFile()) {
SVCERR << "Path \"" << line
<< "\" is relative, resolving to \""
<< testpath << "\""
<< endl;
line = testpath;
}
}
}
playlist.push_back(line);
}
}
return playlist;
}
void
PlaylistFileReader::getSupportedExtensions(std::set<QString> &extensions)
{
extensions.insert("m3u");
}
bool
PlaylistFileReader::isSupported(FileSource source)
{
std::set<QString> supported;
getSupportedExtensions(supported);
QString ext = source.getExtension();
return (supported.find(ext) != supported.end());
}
} // end namespace sv
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