stream.h

// Copyright 2025 Google LLC
//
// 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.
 
#ifndef ACTIONENGINE_NET_STREAM_H_
#define ACTIONENGINE_NET_STREAM_H_
 
#include <functional>
#include <optional>
#include <string>
 
#include "actionengine/concurrency/concurrency.h"
#include "actionengine/data/serialization.h"
#include "actionengine/data/types.h"
 
namespace act {
 
using SendBytesT = std::function<absl::Status(Bytes bytes)>;
using ReceiveBytesT = std::function<std::optional<Bytes>()>;
 
}  // namespace act
 
namespace act {

class WireStream {
 public:
  virtual ~WireStream() = default;

  virtual auto Send(WireMessage message) -> absl::Status = 0;
  virtual auto Receive(absl::Duration timeout)
      -> absl::StatusOr<std::optional<WireMessage>> = 0;

  virtual auto Accept() -> absl::Status = 0;
  virtual auto Start() -> absl::Status = 0;
  virtual void HalfClose() = 0;

  virtual void Abort() = 0;

  virtual auto GetStatus() const -> absl::Status = 0;

  [[nodiscard]] virtual auto GetId() const -> std::string = 0;

  [[nodiscard]] virtual auto GetImpl() const -> const void* { return nullptr; }

  template <typename T>
  [[nodiscard]] auto GetImpl() const -> T* {
    return static_cast<T*>(GetImpl());
  }
};
 
}  // namespace act
 
#endif  // ACTIONENGINE_NET_STREAM_H_