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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.
*/
/*
* Maps directory and song objects to file system paths.
*/
#include "config.h"
#include "Mapper.hxx"
#include "DetachedSong.hxx"
#include "db/Directory.hxx"
#include "db/Song.hxx"
#include "db/LightSong.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/Traits.hxx"
#include "fs/Charset.hxx"
#include "fs/FileSystem.hxx"
#include "fs/DirectoryReader.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
#include <assert.h>
#include <string.h>
#include <sys/stat.h>
#include <errno.h>
static constexpr Domain mapper_domain("mapper");
#ifdef ENABLE_DATABASE
/**
* The absolute path of the music directory encoded in UTF-8.
*/
static std::string music_dir_utf8;
static size_t music_dir_utf8_length;
/**
* The absolute path of the music directory encoded in the filesystem
* character set.
*/
static AllocatedPath music_dir_fs = AllocatedPath::Null();
#endif
/**
* The absolute path of the playlist directory encoded in the
* filesystem character set.
*/
static AllocatedPath playlist_dir_fs = AllocatedPath::Null();
static void
check_directory(const char *path_utf8, const AllocatedPath &path_fs)
{
struct stat st;
if (!StatFile(path_fs, st)) {
FormatErrno(mapper_domain,
"Failed to stat directory \"%s\"",
path_utf8);
return;
}
if (!S_ISDIR(st.st_mode)) {
FormatError(mapper_domain,
"Not a directory: %s", path_utf8);
return;
}
#ifndef WIN32
const auto x = AllocatedPath::Build(path_fs, ".");
if (!StatFile(x, st) && errno == EACCES)
FormatError(mapper_domain,
"No permission to traverse (\"execute\") directory: %s",
path_utf8);
#endif
const DirectoryReader reader(path_fs);
if (reader.HasFailed() && errno == EACCES)
FormatError(mapper_domain,
"No permission to read directory: %s", path_utf8);
}
#ifdef ENABLE_DATABASE
static void
mapper_set_music_dir(AllocatedPath &&path)
{
assert(!path.IsNull());
music_dir_fs = std::move(path);
music_dir_fs.ChopSeparators();
music_dir_utf8 = music_dir_fs.ToUTF8();
music_dir_utf8_length = music_dir_utf8.length();
check_directory(music_dir_utf8.c_str(), music_dir_fs);
}
#endif
static void
mapper_set_playlist_dir(AllocatedPath &&path)
{
assert(!path.IsNull());
playlist_dir_fs = std::move(path);
const auto utf8 = playlist_dir_fs.ToUTF8();
check_directory(utf8.c_str(), playlist_dir_fs);
}
void
mapper_init(AllocatedPath &&_music_dir, AllocatedPath &&_playlist_dir)
{
#ifdef ENABLE_DATABASE
if (!_music_dir.IsNull())
mapper_set_music_dir(std::move(_music_dir));
#else
(void)_music_dir;
#endif
if (!_playlist_dir.IsNull())
mapper_set_playlist_dir(std::move(_playlist_dir));
}
void mapper_finish(void)
{
}
#ifdef ENABLE_DATABASE
const char *
mapper_get_music_directory_utf8(void)
{
return music_dir_utf8.empty()
? nullptr
: music_dir_utf8.c_str();
}
const AllocatedPath &
mapper_get_music_directory_fs(void)
{
return music_dir_fs;
}
#endif
#ifdef ENABLE_DATABASE
AllocatedPath
map_uri_fs(const char *uri)
{
assert(uri != nullptr);
assert(*uri != '/');
if (music_dir_fs.IsNull())
return AllocatedPath::Null();
const auto uri_fs = AllocatedPath::FromUTF8(uri);
if (uri_fs.IsNull())
return AllocatedPath::Null();
return AllocatedPath::Build(music_dir_fs, uri_fs);
}
std::string
map_fs_to_utf8(const char *path_fs)
{
if (PathTraitsFS::IsSeparator(path_fs[0])) {
path_fs = music_dir_fs.RelativeFS(path_fs);
if (path_fs == nullptr || *path_fs == 0)
return std::string();
}
return PathToUTF8(path_fs);
}
#endif
const AllocatedPath &
map_spl_path(void)
{
return playlist_dir_fs;
}
AllocatedPath
map_spl_utf8_to_fs(const char *name)
{
if (playlist_dir_fs.IsNull())
return AllocatedPath::Null();
std::string filename_utf8 = name;
filename_utf8.append(PLAYLIST_FILE_SUFFIX);
const auto filename_fs =
AllocatedPath::FromUTF8(filename_utf8.c_str());
if (filename_fs.IsNull())
return AllocatedPath::Null();
return AllocatedPath::Build(playlist_dir_fs, filename_fs);
}
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