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/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.
*/
#include "config.h" /* must be first for large file support */
#include "Walk.hxx"
#include "UpdateDomain.hxx"
#include "db/DatabaseLock.hxx"
#include "db/plugins/simple/Directory.hxx"
#include "db/plugins/simple/Song.hxx"
#include "storage/StorageInterface.hxx"
#include "fs/AllocatedPath.hxx"
#include "storage/FileInfo.hxx"
#include "archive/ArchiveList.hxx"
#include "archive/ArchivePlugin.hxx"
#include "archive/ArchiveFile.hxx"
#include "archive/ArchiveVisitor.hxx"
#include "util/Error.hxx"
#include "util/StringCompare.hxx"
#include "Log.hxx"
#include <string>
#include <sys/stat.h>
#include <string.h>
static Directory *
LockFindChild(Directory &directory, const char *name)
{
const ScopeDatabaseLock protect;
return directory.FindChild(name);
}
static Directory *
LockMakeChild(Directory &directory, const char *name)
{
const ScopeDatabaseLock protect;
return directory.MakeChild(name);
}
static Song *
LockFindSong(Directory &directory, const char *name)
{
const ScopeDatabaseLock protect;
return directory.FindSong(name);
}
void
UpdateWalk::UpdateArchiveTree(Directory &directory, const char *name)
{
const char *tmp = strchr(name, '/');
if (tmp) {
const std::string child_name(name, tmp);
//add dir is not there already
Directory *subdir = LockMakeChild(directory,
child_name.c_str());
subdir->device = DEVICE_INARCHIVE;
//create directories first
UpdateArchiveTree(*subdir, tmp + 1);
} else {
if (StringIsEmpty(name)) {
LogWarning(update_domain,
"archive returned directory only");
return;
}
//add file
Song *song = LockFindSong(directory, name);
if (song == nullptr) {
song = Song::LoadFile(storage, name, directory);
if (song != nullptr) {
{
const ScopeDatabaseLock protect;
directory.AddSong(song);
}
modified = true;
FormatDefault(update_domain, "added %s/%s",
directory.GetPath(), name);
}
}
}
}
class UpdateArchiveVisitor final : public ArchiveVisitor {
UpdateWalk &walk;
Directory *directory;
public:
UpdateArchiveVisitor(UpdateWalk &_walk, Directory *_directory)
:walk(_walk), directory(_directory) {}
virtual void VisitArchiveEntry(const char *path_utf8) override {
FormatDebug(update_domain,
"adding archive file: %s", path_utf8);
walk.UpdateArchiveTree(*directory, path_utf8);
}
};
/**
* Updates the file listing from an archive file.
*
* @param parent the parent directory the archive file resides in
* @param name the UTF-8 encoded base name of the archive file
* @param st stat() information on the archive file
* @param plugin the archive plugin which fits this archive type
*/
void
UpdateWalk::UpdateArchiveFile(Directory &parent, const char *name,
const StorageFileInfo &info,
const ArchivePlugin &plugin)
{
Directory *directory = LockFindChild(parent, name);
if (directory != nullptr && directory->mtime == info.mtime &&
!walk_discard)
/* MPD has already scanned the archive, and it hasn't
changed since - don't consider updating it */
return;
const auto path_fs = storage.MapChildFS(parent.GetPath(), name);
if (path_fs.IsNull())
/* not a local file: skip, because the archive API
supports only local files */
return;
/* open archive */
Error error;
ArchiveFile *file = archive_file_open(&plugin, path_fs, error);
if (file == nullptr) {
LogError(error);
if (directory != nullptr)
editor.LockDeleteDirectory(directory);
return;
}
FormatDebug(update_domain, "archive %s opened", path_fs.c_str());
if (directory == nullptr) {
FormatDebug(update_domain,
"creating archive directory: %s", name);
const ScopeDatabaseLock protect;
directory = parent.CreateChild(name);
/* mark this directory as archive (we use device for
this) */
directory->device = DEVICE_INARCHIVE;
}
directory->mtime = info.mtime;
UpdateArchiveVisitor visitor(*this, directory);
file->Visit(visitor);
file->Close();
}
bool
UpdateWalk::UpdateArchiveFile(Directory &directory,
const char *name, const char *suffix,
const StorageFileInfo &info)
{
const ArchivePlugin *plugin = archive_plugin_from_suffix(suffix);
if (plugin == nullptr)
return false;
UpdateArchiveFile(directory, name, info, *plugin);
return true;
}
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