http/verb.hpp

#pragma once

#include <cstddef>
#include <cstdint>
#include <iostream>  // NOLINT
#include <optional>
#include <string_view>

#include "boost/beast/http/verb.hpp"  //NOLINT

enum class HttpVerb : std::uint8_t {
  Delete = 0,
  Get,
  Head,
  Options,
  Patch,
  Post,
  Put,
  Max,
};

static constexpr size_t maxVerbIndex = static_cast<size_t>(HttpVerb::Max) - 1U;

// MaxVerb + 1 is designated as the "not found" verb.  It is done this way
// to keep the BaseRule as a single bitfield (thus keeping the struct small)
// while still having a way to declare a route a "not found" route.
static constexpr const size_t notFoundIndex = maxVerbIndex + 1;
static constexpr const size_t methodNotAllowedIndex = notFoundIndex + 1;

inline std::optional<HttpVerb> httpVerbFromBoost(boost::beast::http::verb bv) {
  switch (bv) {
    case boost::beast::http::verb::delete_:
      return HttpVerb::Delete;
    case boost::beast::http::verb::get:
      return HttpVerb::Get;
    case boost::beast::http::verb::head:
      return HttpVerb::Head;
    case boost::beast::http::verb::options:
      return HttpVerb::Options;
    case boost::beast::http::verb::patch:
      return HttpVerb::Patch;
    case boost::beast::http::verb::post:
      return HttpVerb::Post;
    case boost::beast::http::verb::put:
      return HttpVerb::Put;
    default:
      return std::nullopt;
  }

  return std::nullopt;
}

inline std::string_view httpVerbToString(HttpVerb verb) {
  switch (verb) {
    case HttpVerb::Delete:
      return "DELETE";
    case HttpVerb::Get:
      return "GET";
    case HttpVerb::Head:
      return "HEAD";
    case HttpVerb::Patch:
      return "PATCH";
    case HttpVerb::Post:
      return "POST";
    case HttpVerb::Put:
      return "PUT";
    case HttpVerb::Options:
      return "OPTIONS";
    case HttpVerb::Max:
      return "";
  }

  // Should never reach here
  return "";
}

inline std::string_view boostVerbToString(boost::beast::http::verb bv) {
  std::optional<HttpVerb> verb = httpVerbFromBoost(bv);
  if (!verb) {
    return "";
  }
  return httpVerbToString(*verb);
}