130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
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#pragma once
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#if !defined(MIJIN_VIRTUAL_FILESYSTEM_RELATIVE_HPP_INCLUDED)
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#define MIJIN_VIRTUAL_FILESYSTEM_RELATIVE_HPP_INCLUDED 1
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#include "./filesystem.hpp"
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#include "../internal/common.hpp"
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namespace mijin
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{
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//
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// public defines
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//
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//
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// public constants
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//
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//
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// public types
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//
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template<typename TWrapped>
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class RelativeFileSystemAdapter : public FileSystemAdapter
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{
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private:
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TWrapped wrapped_;
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Path root_;
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public:
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template<typename... TArgs>
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explicit RelativeFileSystemAdapter(Path root, TArgs&&... args)
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: wrapped_(std::forward<TArgs>(args)...), root_(std::move(root)) {}
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RelativeFileSystemAdapter(const RelativeFileSystemAdapter&) = default;
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RelativeFileSystemAdapter(RelativeFileSystemAdapter&&) MIJIN_NOEXCEPT = default;
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RelativeFileSystemAdapter& operator=(const RelativeFileSystemAdapter&) = default;
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RelativeFileSystemAdapter& operator=(RelativeFileSystemAdapter&&) MIJIN_NOEXCEPT = default;
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std::vector<FolderEntry> listFiles(PathView folder) override;
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FileInfo getFileInfo(PathView file) override;
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Optional<NativePath> getNativePath(PathView file) override;
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StreamError open(PathView path, FileOpenMode mode, std::unique_ptr<Stream>& outStream) override;
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private:
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Path appendPath(PathView other) const MIJIN_NOEXCEPT;
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};
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//
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// public functions
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//
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template<typename TWrapped>
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std::vector<FolderEntry> RelativeFileSystemAdapter<TWrapped>::listFiles(PathView folder)
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{
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std::vector<FolderEntry> result;
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result = wrapped_.listFiles(appendPath(folder));
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for (FolderEntry& fileInfo : result) {
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fileInfo.path = Path("/") / fileInfo.path.stringView().substr(root_.size());
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}
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return result;
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}
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template<typename TWrapped>
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FileInfo RelativeFileSystemAdapter<TWrapped>::getFileInfo(PathView file)
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{
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return wrapped_.getFileInfo(appendPath(file));
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}
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template<typename TWrapped>
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Optional<NativePath> RelativeFileSystemAdapter<TWrapped>::getNativePath(PathView file)
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{
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return wrapped_.getNativePath(appendPath(file));
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}
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template<typename TWrapped>
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StreamError RelativeFileSystemAdapter<TWrapped>::open(PathView path, FileOpenMode mode, std::unique_ptr<Stream>& outStream)
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{
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return wrapped_.open(appendPath(path), mode, outStream);
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}
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template<typename TWrapped>
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Path RelativeFileSystemAdapter<TWrapped>::appendPath(PathView other) const MIJIN_NOEXCEPT
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{
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Path combinedPath = root_;
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std::string_view otherSv(other.stringView());
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if (!otherSv.empty() && otherSv[0] == Path::SEPARATOR) {
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otherSv = otherSv.substr(1);
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}
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combinedPath /= otherSv;
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return combinedPath;
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}
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namespace vfs_pipe
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{
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template<typename TBase>
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struct RelativeBuilder : Builder<RelativeBuilder<TBase>, RelativeFileSystemAdapter<typename TBase::adapter_t>>
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{
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Path root;
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TBase base;
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std::unique_ptr<RelativeFileSystemAdapter<typename TBase::adapter_t>> build()
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{
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return std::make_unique<RelativeFileSystemAdapter<typename TBase::adapter_t>>(root, std::move(*base.build()));
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}
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};
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struct RelativeOptions
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{
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Path root;
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};
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[[nodiscard]]
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inline RelativeOptions relative_to(Path root) noexcept
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{
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return {.root = std::move(root) };
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}
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template<typename TBase>
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[[nodiscard]]
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RelativeBuilder<TBase> operator|(TBase other, RelativeOptions options) noexcept
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{
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return {.root = std::move(options.root), .base = std::move(other) };
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}
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}
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} // namespace mijin
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#endif // !defined(MIJIN_VIRTUAL_FILESYSTEM_RELATIVE_HPP_INCLUDED)
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