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/*
* Copyright 2003-2018 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 "LocalStorage.hxx"
#include "storage/StoragePlugin.hxx"
#include "storage/StorageInterface.hxx"
#include "storage/FileInfo.hxx"
#include "fs/FileInfo.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/DirectoryReader.hxx"
#include "util/StringCompare.hxx"
#include <string>
class LocalDirectoryReader final : public StorageDirectoryReader {
AllocatedPath base_fs;
DirectoryReader reader;
std::string name_utf8;
public:
LocalDirectoryReader(AllocatedPath &&_base_fs)
:base_fs(std::move(_base_fs)), reader(base_fs) {}
/* virtual methods from class StorageDirectoryReader */
const char *Read() noexcept override;
StorageFileInfo GetInfo(bool follow) override;
};
class LocalStorage final : public Storage {
const AllocatedPath base_fs;
const std::string base_utf8;
public:
explicit LocalStorage(Path _base_fs)
:base_fs(_base_fs), base_utf8(base_fs.ToUTF8Throw()) {
assert(!base_fs.IsNull());
assert(!base_utf8.empty());
}
/* virtual methods from class Storage */
StorageFileInfo GetInfo(const char *uri_utf8, bool follow) override;
std::unique_ptr<StorageDirectoryReader> OpenDirectory(const char *uri_utf8) override;
std::string MapUTF8(const char *uri_utf8) const noexcept override;
AllocatedPath MapFS(const char *uri_utf8) const noexcept override;
const char *MapToRelativeUTF8(const char *uri_utf8) const noexcept override;
private:
AllocatedPath MapFSOrThrow(const char *uri_utf8) const;
};
static StorageFileInfo
Stat(Path path, bool follow)
{
const FileInfo src(path, follow);
StorageFileInfo info;
if (src.IsRegular())
info.type = StorageFileInfo::Type::REGULAR;
else if (src.IsDirectory())
info.type = StorageFileInfo::Type::DIRECTORY;
else
info.type = StorageFileInfo::Type::OTHER;
info.size = src.GetSize();
info.mtime = src.GetModificationTime();
#ifdef _WIN32
info.device = info.inode = 0;
#else
info.device = src.GetDevice();
info.inode = src.GetInode();
#endif
return info;
}
std::string
LocalStorage::MapUTF8(const char *uri_utf8) const noexcept
{
assert(uri_utf8 != nullptr);
if (StringIsEmpty(uri_utf8))
return base_utf8;
return PathTraitsUTF8::Build(base_utf8.c_str(), uri_utf8);
}
AllocatedPath
LocalStorage::MapFSOrThrow(const char *uri_utf8) const
{
assert(uri_utf8 != nullptr);
if (StringIsEmpty(uri_utf8))
return base_fs;
return base_fs / AllocatedPath::FromUTF8Throw(uri_utf8);
}
AllocatedPath
LocalStorage::MapFS(const char *uri_utf8) const noexcept
{
try {
return MapFSOrThrow(uri_utf8);
} catch (...) {
return nullptr;
}
}
const char *
LocalStorage::MapToRelativeUTF8(const char *uri_utf8) const noexcept
{
return PathTraitsUTF8::Relative(base_utf8.c_str(), uri_utf8);
}
StorageFileInfo
LocalStorage::GetInfo(const char *uri_utf8, bool follow)
{
return Stat(MapFSOrThrow(uri_utf8), follow);
}
std::unique_ptr<StorageDirectoryReader>
LocalStorage::OpenDirectory(const char *uri_utf8)
{
return std::make_unique<LocalDirectoryReader>(MapFSOrThrow(uri_utf8));
}
const char *
LocalDirectoryReader::Read() noexcept
{
while (reader.ReadEntry()) {
const Path name_fs = reader.GetEntry();
if (PathTraitsFS::IsSpecialFilename(name_fs.c_str()))
continue;
try {
name_utf8 = name_fs.ToUTF8Throw();
return name_utf8.c_str();
} catch (...) {
}
}
return nullptr;
}
StorageFileInfo
LocalDirectoryReader::GetInfo(bool follow)
{
return Stat(base_fs / reader.GetEntry(), follow);
}
std::unique_ptr<Storage>
CreateLocalStorage(Path base_fs)
{
return std::make_unique<LocalStorage>(base_fs);
}
const StoragePlugin local_storage_plugin = {
"local",
nullptr,
};