Luna/libluna/include/luna/PathParser.h

#pragma once
#include <luna/CString.h>
#include <luna/Heap.h>
#include <luna/String.h>

static inline bool is_not_delim(char c)
{
    return c && c != '/';
}

class PathParser
{
  public:
    static Result<PathParser> create(const char* path);

    PathParser(PathParser&& other);
    PathParser(const PathParser&) = delete;

    static Result<String> join(StringView path1, StringView path2);
    static Result<String> join_paths(StringView path1, StringView path2);

    static Result<String> realpath(StringView path);

    static bool is_absolute(StringView path)
    {
        return *path.chars() == '/';
    }

    ~PathParser();

    bool is_absolute() const
    {
        return is_absolute(StringView { m_original });
    }

    bool has_next() const
    {
        return m_already_called_next ? (bool)m_strtok_saved_state : is_not_delim(*m_copy);
    }

    static Result<String> basename(StringView path);
    static Result<String> dirname(StringView path);

    Option<const char*> next();

  private:
    PathParser(const char* original, char* copy);

    const char* m_original { nullptr };
    char* m_copy { nullptr };
    bool m_already_called_next { false };
    char* m_strtok_saved_state { nullptr };
};