72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#ifndef MPD_STORAGE_INTERFACE_HXX
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#define MPD_STORAGE_INTERFACE_HXX
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#include <memory>
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#include <string>
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#include <string_view>
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struct StorageFileInfo;
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class AllocatedPath;
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class StorageDirectoryReader {
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public:
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StorageDirectoryReader() = default;
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StorageDirectoryReader(const StorageDirectoryReader &) = delete;
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virtual ~StorageDirectoryReader() noexcept = default;
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virtual const char *Read() noexcept = 0;
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/**
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* Throws #std::runtime_error on error.
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*/
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virtual StorageFileInfo GetInfo(bool follow) = 0;
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};
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class Storage {
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public:
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Storage() = default;
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Storage(const Storage &) = delete;
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virtual ~Storage() noexcept = default;
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/**
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* Throws #std::runtime_error on error.
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*/
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virtual StorageFileInfo GetInfo(std::string_view uri_utf8, bool follow) = 0;
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/**
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* Throws #std::runtime_error on error.
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*/
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virtual std::unique_ptr<StorageDirectoryReader> OpenDirectory(std::string_view uri_utf8) = 0;
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/**
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* Map the given relative URI to an absolute URI.
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*/
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[[gnu::pure]]
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virtual std::string MapUTF8(std::string_view uri_utf8) const noexcept = 0;
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/**
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* Map the given relative URI to a local file path. Returns
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* nullptr on error or if this storage does not
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* support local files.
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*/
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[[gnu::pure]]
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virtual AllocatedPath MapFS(std::string_view uri_utf8) const noexcept;
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[[gnu::pure]]
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AllocatedPath MapChildFS(std::string_view uri_utf8,
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std::string_view child_utf8) const noexcept;
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/**
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* Check if the given URI points inside this storage. If yes,
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* then it returns a relative URI (pointing inside the given
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* string); if not, returns nullptr.
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*/
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[[gnu::pure]]
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virtual std::string_view MapToRelativeUTF8(std::string_view uri_utf8) const noexcept = 0;
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};
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#endif
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