/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-2021 Couchbase, Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

#include "cmd_sasl_list_mechs.hxx"

#include <algorithm>
#include <gsl/assert>

namespace couchbase::core::protocol
{
auto
sasl_list_mechs_response_body::parse(key_value_status_code status,
                                     const header_buffer& header,
                                     std::uint8_t framing_extras_size,
                                     std::uint16_t key_size,
                                     std::uint8_t extras_size,
                                     const std::vector<std::byte>& body,
                                     const cmd_info& /* info */) -> bool
{
  Expects(header[1] == static_cast<std::byte>(opcode));
  if (status == key_value_status_code::success) {
    auto previous = body.begin();
    auto current = std::find(
      body.begin() + framing_extras_size + extras_size + key_size, body.end(), std::byte{ ' ' });
    std::string mech;
    while (current != body.end()) {
      mech.resize(static_cast<std::size_t>(std::distance(previous, current)));
      std::transform(previous, current, mech.begin(), [](auto b) {
        return static_cast<char>(b);
      });
      supported_mechs_.emplace_back(mech);
      previous = current + 1;
      current = std::find(previous, body.end(), std::byte{ ' ' });
    }
    mech.resize(static_cast<std::size_t>(std::distance(previous, current)));
    std::transform(previous, current, mech.begin(), [](auto b) {
      return static_cast<char>(b);
    });
    supported_mechs_.emplace_back(mech);
    return true;
  }
  return false;
}
} // namespace couchbase::core::protocol