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/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2015 Stephen Kelly <steveire@gmail.com>
  Copyright 2016 Tobias Hunger <tobias.hunger@qt.io>

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/

#pragma once

#include "cmListFileCache.h"
#include "cmState.h"

#if defined(CMAKE_BUILD_WITH_CMAKE)
#include "cm_jsoncpp_value.h"
#include "cm_uv.h"
#endif

#include <string>
#include <vector>

class cmServerConnection;
class cmServerProtocol;
class cmServerRequest;
class cmServerResponse;

class cmServer
{
public:
  class DebugInfo;

  cmServer(cmServerConnection* conn, bool supportExperimental);
  ~cmServer();

  bool Serve(std::string* errorMessage);

private:
  void RegisterProtocol(cmServerProtocol* protocol);

  // Callbacks from cmServerConnection:
  void PopOne();
  void QueueRequest(const std::string& request);

  static void reportProgress(const char* msg, float progress, void* data);
  static void reportMessage(const char* msg, const char* title, bool& cancel,
                            void* data);

  // Handle requests:
  cmServerResponse SetProtocolVersion(const cmServerRequest& request);

  void PrintHello() const;

  // Write responses:
  void WriteProgress(const cmServerRequest& request, int min, int current,
                     int max, const std::string& message) const;
  void WriteMessage(const cmServerRequest& request, const std::string& message,
                    const std::string& title) const;
  void WriteResponse(const cmServerResponse& response,
                     const DebugInfo* debug) const;
  void WriteParseError(const std::string& message) const;
  void WriteSignal(const std::string& name, const Json::Value& obj) const;

  void WriteJsonObject(Json::Value const& jsonValue,
                       const DebugInfo* debug) const;

  static cmServerProtocol* FindMatchingProtocol(
    const std::vector<cmServerProtocol*>& protocols, int major, int minor);

  cmServerConnection* Connection = nullptr;
  const bool SupportExperimental;

  cmServerProtocol* Protocol = nullptr;
  std::vector<cmServerProtocol*> SupportedProtocols;
  std::vector<std::string> Queue;

  std::string DataBuffer;
  std::string JsonData;

  uv_loop_t* Loop = nullptr;

  typedef union
  {
    uv_tty_t tty;
    uv_pipe_t pipe;
  } InOutUnion;

  InOutUnion Input;
  InOutUnion Output;
  uv_stream_t* InputStream = nullptr;
  uv_stream_t* OutputStream = nullptr;

  mutable bool Writing = false;

  friend class cmServerConnection;
  friend class cmServerProtocol;
  friend class cmServerRequest;
};