138 lines
3.5 KiB
C++
138 lines
3.5 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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fs::path root_;
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public:
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template<typename... TArgs>
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explicit RelativeFileSystemAdapter(fs::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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fs::path getHomeFolder() override;
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std::vector<FileInfo> listFiles(const fs::path& folder) override;
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FileInfo getFileInfo(const fs::path& file) override;
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Optional<fs::path> getNativePath(const fs::path& file) override;
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StreamError open(const fs::path& path, FileOpenMode mode, std::unique_ptr<Stream>& outStream) override;
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private:
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fs::path appendPath(const fs::path& 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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fs::path RelativeFileSystemAdapter<TWrapped>::getHomeFolder()
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{
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return root_;
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}
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template<typename TWrapped>
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std::vector<FileInfo> RelativeFileSystemAdapter<TWrapped>::listFiles(const fs::path& folder)
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{
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std::vector<FileInfo> result;
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result = wrapped_.listFiles(appendPath(folder));
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for (FileInfo& fileInfo : result) {
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fileInfo.path = "/" / fileInfo.path.lexically_relative(root_);
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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(const fs::path& 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<fs::path> RelativeFileSystemAdapter<TWrapped>::getNativePath(const fs::path& 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(const fs::path& 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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fs::path RelativeFileSystemAdapter<TWrapped>::appendPath(const fs::path& other) const MIJIN_NOEXCEPT
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{
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fs::path combinedPath = root_;
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if (other.is_absolute()) {
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combinedPath += other;
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}
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else {
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combinedPath /= other;
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}
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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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fs::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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fs::path root;
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};
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[[nodiscard]]
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inline RelativeOptions relative_to(fs::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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