decrement_options.hxx

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/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-Present 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.
 */
 
#pragma once
 
#include <couchbase/common_durability_options.hxx>
#include <couchbase/counter_result.hxx>
#include <couchbase/expiry.hxx>
 
#include <chrono>
#include <functional>
#include <memory>
#include <optional>
 
namespace couchbase
{
struct decrement_options : public common_durability_options<decrement_options> {
  struct built : public common_durability_options<decrement_options>::built {
    const std::uint32_t expiry;
    const std::uint64_t delta;
    const std::optional<std::uint64_t> initial_value;
  };
 
  [[nodiscard]] auto build() const -> built
  {
    auto base = build_common_durability_options();
    return { base, expiry_, delta_, initial_value_ };
  }
 
  auto expiry(std::chrono::seconds duration) -> decrement_options&
  {
    expiry_ = core::impl::expiry_relative(duration);
    return self();
  }
 
  auto expiry(std::chrono::system_clock::time_point time_point) -> decrement_options&
  {
    expiry_ = core::impl::expiry_absolute(time_point);
    return self();
  }
 
  auto delta(std::uint64_t delta) -> decrement_options&
  {
    delta_ = delta;
    return self();
  }
 
  auto initial(std::uint64_t value) -> decrement_options&
  {
    initial_value_ = value;
    return self();
  }
 
private:
  std::uint32_t expiry_{ 0 };
  std::uint64_t delta_{ 1 };
  std::optional<std::uint64_t> initial_value_{};
};
 
using decrement_handler = std::function<void(error, counter_result)>;
} // namespace couchbase