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/*
* Copyright (C) 2003-2014 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.
*/
#ifndef MPD_UPDATE_WALK_HXX
#define MPD_UPDATE_WALK_HXX
#include "check.h"
#include "Editor.hxx"
#include <sys/stat.h>
struct stat;
struct FileInfo;
struct Directory;
struct ArchivePlugin;
class Storage;
class ExcludeList;
class UpdateWalk final {
#ifdef ENABLE_ARCHIVE
friend class UpdateArchiveVisitor;
#endif
#ifndef WIN32
static constexpr bool DEFAULT_FOLLOW_INSIDE_SYMLINKS = true;
static constexpr bool DEFAULT_FOLLOW_OUTSIDE_SYMLINKS = true;
bool follow_inside_symlinks;
bool follow_outside_symlinks;
#endif
bool walk_discard;
bool modified;
/**
* Set to true by the main thread when the update thread shall
* cancel as quickly as possible. Access to this flag is
* unprotected.
*/
volatile bool cancel;
Storage &storage;
DatabaseEditor editor;
public:
UpdateWalk(EventLoop &_loop, DatabaseListener &_listener,
Storage &_storage);
/**
* Cancel the current update and quit the Walk() method as
* soon as possible.
*/
void Cancel() {
cancel = true;
}
/**
* Call from the main thread before starting the update
* thread.
*/
void Prepare() {
cancel = false;
}
/**
* Returns true if the database was modified.
*/
bool Walk(Directory &root, const char *path, bool discard);
private:
gcc_pure
bool SkipSymlink(const Directory *directory,
const char *utf8_name) const;
void RemoveExcludedFromDirectory(Directory &directory,
const ExcludeList &exclude_list);
void PurgeDeletedFromDirectory(Directory &directory);
void UpdateSongFile2(Directory &directory,
const char *name, const char *suffix,
const FileInfo &info);
bool UpdateSongFile(Directory &directory,
const char *name, const char *suffix,
const FileInfo &info);
bool UpdateContainerFile(Directory &directory,
const char *name, const char *suffix,
const FileInfo &info);
#ifdef ENABLE_ARCHIVE
void UpdateArchiveTree(Directory &parent, const char *name);
bool UpdateArchiveFile(Directory &directory,
const char *name, const char *suffix,
const FileInfo &info);
void UpdateArchiveFile(Directory &directory, const char *name,
const FileInfo &info,
const ArchivePlugin &plugin);
#else
bool UpdateArchiveFile(gcc_unused Directory &directory,
gcc_unused const char *name,
gcc_unused const char *suffix,
gcc_unused const FileInfo &info) {
return false;
}
#endif
bool UpdatePlaylistFile(Directory &directory,
const char *name, const char *suffix,
const FileInfo &info);
bool UpdateRegularFile(Directory &directory,
const char *name, const FileInfo &info);
void UpdateDirectoryChild(Directory &directory,
const char *name, const FileInfo &info);
bool UpdateDirectory(Directory &directory, const FileInfo &info);
/**
* Create the specified directory object if it does not exist
* already or if the #stat object indicates that it has been
* modified since the last update. Returns nullptr when it
* exists already and is unmodified.
*
* The caller must lock the database.
*/
Directory *MakeDirectoryIfModified(Directory &parent, const char *name,
const FileInfo &info);
Directory *DirectoryMakeChildChecked(Directory &parent,
const char *uri_utf8,
const char *name_utf8);
Directory *DirectoryMakeUriParentChecked(Directory &root,
const char *uri);
void UpdateUri(Directory &root, const char *uri);
};
#endif
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