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storage.cpp
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storage.cpp
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#include "storage.h"
#include <QSettings>
#include <QFileInfo>
#include <QTextStream>
#include <QDirIterator>
static const QString TAB_FILE("tabs.txt");
storage::storage(QObject *parent) :
QObject(parent)
{
fetchConfigPath();
}
storage::storeReturns storage::addPlaylist(const QString &title, const QStringList &entries)
{
if (playlistAlreadyExists(title))
return srAlreadyExists;
return writeEntriesToFile(playlistToPath(title), entries);
}
storage::storeReturns storage::renamePlaylist(const QString &oldTitle, const QString &newTitle)
{
QFile file(playlistToPath(oldTitle));
if (!file.exists())
return srNoLongerExists; // sneakily removed by the user. bad user!
if (!file.rename(playlistToPath(newTitle)))
return srRenameFailed; // this is probably a filesystem/permission error
return srSuccess;
}
storage::storeReturns storage::removePlaylist(const QString &title)
{
QFile file(playlistToPath(title));
if (!file.exists())
return srNoLongerExists;
if (!file.remove())
return srRemoveFailed;
return srSuccess;
}
storage::storeReturns storage::importPlaylist(const QString &filePath, const QString &title, QStringList &entries)
{
if (!entriesFromPlaylist(filePath, entries))
return srReadFailed;
return addPlaylist(title, entries);
}
storage::storeReturns storage::exportPlaylist(const QString &filePath, const QStringList &entries)
{
return writeEntriesToFile(filePath, entries);
}
storage::storeReturns storage::updatePlaylist(const QString &title, const QStringList &entries)
{
return writeEntriesToFile(playlistToPath(title), entries);
}
void storage::enumPlaylists()
{
// We start with two lists: whats on the disk and the tab order from last
// time. So we merge the two, and load whatever playlists we can find.
QStringList allLists;
QStringList savedLists = readTabs();
foreach (const QString &s, savedLists) {
allLists.append(s + ".m3u");
}
QStringList storedLists = QDir(configPath).entryList(QStringList() << "*.m3u");
allLists.append(storedLists);
allLists.removeDuplicates();
QDir configDir(configPath);
QFileInfo info;
QStringList entries;
foreach (const QString &s, allLists) {
info.setFile(configDir.filePath(s));
if (entriesFromPlaylist(info.absoluteFilePath(), entries))
emit playlistFound(info.completeBaseName(), entries);
}
emit finishedEnumerating();
}
void storage::saveTabs(const QStringList &tabs)
{
writeTabs(tabs);
}
void storage::fetchConfigPath()
{
QSettings::setDefaultFormat(QSettings::IniFormat);
configPath = QFileInfo(QSettings().fileName()).absolutePath() + "/";
QDir().mkpath(configPath);
}
bool storage::entriesFromPlaylist(const QString &filePath, QStringList &entries)
{
QFile file(filePath);
if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
return false;
QTextStream qts(&file);
entries = entriesFromM3U(qts.readAll().split('\n'));
return true;
}
storage::storeReturns storage::writeEntriesToFile(const QString &filePath, const QStringList &entries)
{
QFile file(filePath);
if (!file.open(QIODevice::ReadWrite | QIODevice::Text))
return srWriteFailed;
file.resize(0);
QTextStream qts(&file);
qts << entriesToM3U(entries).join('\n');
return srSuccess;
}
bool storage::playlistAlreadyExists(const QString &title)
{
QFileInfo info(playlistToPath(title));
return info.exists();
}
QStringList storage::readTabs()
{
QFile file(QDir(configPath).absoluteFilePath(TAB_FILE));
if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
return QStringList();
return QTextStream(&file).readAll().split('\n');
}
void storage::writeTabs(const QStringList &tabs)
{
QFile file(QDir(configPath).absoluteFilePath(TAB_FILE));
if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
return;
QTextStream(&file) << tabs.join('\n');
}
QStringList storage::entriesToM3U(const QStringList &entries)
{
return QStringList() << "#EXTM3U" << entries;
}
QStringList storage::entriesFromM3U(QStringList M3U)
{
QStringList items;
items.clear();
foreach(QString s, M3U) {
s = s.trimmed();
if (s.isEmpty() || s[0] == '#')
continue;
if (QFileInfo(s).exists())
items.append(s);
}
return items;
}
QString storage::playlistToPath(const QString &title)
{
return QString("%1%2.m3u").arg(configPath,title);
}