native_filesystem.h

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#pragma once
 
#include <liboscar/platform/resource_directory_entry.h>
#include <liboscar/platform/resource_stream.h>
#include <liboscar/platform/virtual_filesystem.h>
#include <liboscar/shims/cpp23/generator.h>
 
#include <filesystem>
#include <functional>
#include <optional>
 
namespace osc { class ResourcePath; }
 
namespace osc
{
    // A `VirtualFilesystem` that uses the process's native filesystem.
    class NativeFilesystem final : public VirtualFilesystem {
    public:
        explicit NativeFilesystem(const std::filesystem::path& root_directory) :
            root_directory_{root_directory}
        {}
 
        const std::filesystem::path& root_directory() const { return root_directory_; }
 
        std::optional<std::filesystem::path> resource_filepath(const ResourcePath&) const;
    private:
        bool impl_resource_exists(const ResourcePath&) final;
        ResourceStream impl_open(const ResourcePath&) final;
        cpp23::generator<ResourceDirectoryEntry> impl_iterate_directory(ResourcePath) final;
 
        std::filesystem::path root_directory_;
    };
}