project_directory.hpp

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#pragma once

 
#include <filesystem>
#include <optional>
#include <shared_mutex>
#include <span>
#include <string>
#include <string_view>
#include <unordered_map>
 
#include <wowlib/core/buffer.hpp>
#include <wowlib/core/error.hpp>
#include <wowlib/core/shared_mutex.hpp>
 
namespace wowlib::fs {
  class ProjectDirectory {
  public:
    ProjectDirectory() = default;

    static Result<ProjectDirectory> open(std::filesystem::path root);

    std::optional<std::filesystem::path> resolve(std::string_view path) const;

    bool exists(std::string_view path) const;

    Result<FileBuffer> read(std::string_view path) const;

    Result<void> write(std::string_view path, std::span<const std::byte> content);

    void rescan();

    const std::filesystem::path& root() const { return _root; }

    std::size_t size() const;
 
    ProjectDirectory(const ProjectDirectory&) = delete;
    ProjectDirectory& operator=(const ProjectDirectory&) = delete;
    ProjectDirectory(ProjectDirectory&& other) noexcept;
    ProjectDirectory& operator=(ProjectDirectory&& other) noexcept;
 
  private:
    void _indexTreeLocked();
 
    std::filesystem::path _root;
    mutable SharedMutex _mtx;
    std::unordered_map<std::string, std::filesystem::path> _index;
    // canonical -> on-disk
  };
}