blockchain/contrib/epee/include/storages/levin_abstract_invoke2.h

// Copyright (c) 2019, anonimal, <anonimal@zano.org>
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 

#pragma once

#include "portable_storage_template_helper.h"
#include <boost/utility/value_init.hpp>
#include "net/levin_base.h"

namespace epee
{
  namespace net_utils
  {
    template<class t_arg, class t_result, class t_transport>
    bool invoke_remote_command2(int command, const t_arg& out_struct, t_result& result_struct, t_transport& transport)
    {
      if(!transport.is_connected())
        return false;

      serialization::portable_storage stg;
      out_struct.store(stg);
      std::string buff_to_send, buff_to_recv;
      stg.store_to_binary(buff_to_send);
      int res = 0;
      TRY_ENTRY()
      res = transport.invoke(command, buff_to_send, buff_to_recv);
      CATCH_ENTRY2(false)
      if( res <=0 )
      {
        LOG_PRINT_RED("Failed to invoke command " << command << " return code " << res << "(" << epee::levin::get_err_descr(res) << ")", LOG_LEVEL_1);
        return false;
      }
      serialization::portable_storage stg_ret;
      if(!stg_ret.load_from_binary(buff_to_recv))
      {
        LOG_ERROR("Failed to load_from_binary on command " << command);
        return false;
      }
      result_struct.load(stg_ret);
      return true;
    }

    template<class t_arg, class t_transport>
    bool notify_remote_command2(int command, const t_arg& out_struct, t_transport& transport)
    {
      if(!transport.is_connected())
        return false;

      serialization::portable_storage stg;
      out_struct.store(&stg);
      std::string buff_to_send;
      stg.store_to_binary(buff_to_send);
      int res = 0;
      TRY_ENTRY()
      res = transport.notify(command, buff_to_send);
      CATCH_ENTRY2(false)
      if(res <=0 )
      {
        LOG_ERROR("Failed to notify command " << command << " return code " << res << "(" << epee::levin::get_err_descr(res) << ")");
        return false;
      }
      return true;
    }

    template<class t_arg, class t_result, class t_transport>
    bool invoke_remote_command2(boost::uuids::uuid conn_id, int command, const t_arg& out_struct, t_result& result_struct, t_transport& transport)
    {

      typename serialization::portable_storage stg;
      out_struct.store(stg);
      std::string buff_to_send, buff_to_recv;
      stg.store_to_binary(buff_to_send);
      int res = 0;
      TRY_ENTRY()
      res = transport.invoke(command, buff_to_send, buff_to_recv, conn_id);
      CATCH_ENTRY2(false)
      if( res <=0 )
      {
        LOG_PRINT_L1("Failed to invoke command " << command << " return code " << res << "(" << epee::levin::get_err_descr(res) << ")");
        return false;
      }
      typename serialization::portable_storage stg_ret;
      if(!stg_ret.load_from_binary(buff_to_recv))
      {
        LOG_ERROR("Failed to load_from_binary on command " << command);
        return false;
      }
      result_struct.load(stg_ret);

      return true;
    }

    template<class t_result, class t_arg, class callback_t, class t_transport>
    bool async_invoke_remote_command2(boost::uuids::uuid conn_id, int command, const t_arg& out_struct, t_transport& transport, const callback_t& cb, size_t inv_timeout = LEVIN_DEFAULT_TIMEOUT_PRECONFIGURED)
    {
      typename serialization::portable_storage stg;
      const_cast<t_arg&>(out_struct).store(stg);//TODO: add true const support to searilzation
      std::string buff_to_send, buff_to_recv;
      stg.store_to_binary(buff_to_send);
      int res = transport.invoke_async(command, buff_to_send, conn_id, [cb, command](int code, const std::string& buff, typename t_transport::connection_context& context)->bool 
      {
        t_result result_struct = AUTO_VAL_INIT(result_struct);
        if( code <=0 )
        {
          LOG_PRINT_L2("BACKTRACE: " << ENDL << epee::misc_utils::get_callstack());
          LOG_PRINT_L1("Failed to invoke command " << command << " return code " << code << "(" << epee::levin::get_err_descr(code) << ")context:" << print_connection_context(context));
          TRY_ENTRY()
          cb(code, result_struct, context);
          CATCH_ENTRY2(true)
          return false;
        }
        serialization::portable_storage stg_ret;
        if(!stg_ret.load_from_binary(buff))
        {
          LOG_ERROR("Failed to load_from_binary on command " << command);
          TRY_ENTRY();
          cb(LEVIN_ERROR_FORMAT, result_struct, context);
          CATCH_ENTRY2(true);
          return false;
        }
        result_struct.load(stg_ret);
        TRY_ENTRY()
        cb(code, result_struct, context);
        CATCH_ENTRY2(true)
        return true;
      }, inv_timeout);
      if( res <=0 )
      {
        LOG_PRINT_L2("BACKTRACE: " << ENDL << epee::misc_utils::get_callstack());
        LOG_PRINT_L1("Failed to invoke command " << command << " return code " << res << "(" << epee::levin::get_err_descr(res) << ") conn_id=" << conn_id);
        return false;
      }
      return true;
    }

    template<class t_arg, class t_transport>
    bool notify_remote_command2(boost::uuids::uuid conn_id, int command, const t_arg& out_struct, t_transport& transport)
    {

      serialization::portable_storage stg;
      out_struct.store(stg);
      std::string buff_to_send, buff_to_recv;
      stg.store_to_binary(buff_to_send);
      int res = LEVIN_ERROR_UNKNOWN_ERROR;
      TRY_ENTRY()
      res = transport.notify(command, buff_to_send, conn_id);
      CATCH_ENTRY2(false)
      if(res <=0 )
      {
        LOG_PRINT_RED_L0("Failed to notify command " << command << " return code " << res << "(" << epee::levin::get_err_descr(res) << ")");
        return false;
      }
      return true;
    }
    //----------------------------------------------------------------------------------------------------
    //----------------------------------------------------------------------------------------------------
    template<class t_owner, class t_in_type, class t_out_type, class t_context, class callback_t>
    int buff_to_t_adapter(int command, const std::string& in_buff, std::string& buff_out, callback_t cb, t_context& context )
    {
      serialization::portable_storage strg;
      if(!strg.load_from_binary(in_buff))
      {
        LOG_ERROR("Failed to load_from_binary in command " << command);
        return LEVIN_ERROR_FORMAT;
      }
      boost::value_initialized<t_in_type> in_struct;
      boost::value_initialized<t_out_type> out_struct;

      static_cast<t_in_type&>(in_struct).load(strg);
      int res = LEVIN_ERROR_UNKNOWN_ERROR;
      TRY_ENTRY()
      res = cb(command, static_cast<t_in_type&>(in_struct), static_cast<t_out_type&>(out_struct), context);
      CATCH_ENTRY2(LEVIN_ERROR_EXCEPTION)
      serialization::portable_storage strg_out;
      static_cast<t_out_type&>(out_struct).store(strg_out);

      if(!strg_out.store_to_binary(buff_out))
      {
        LOG_ERROR("Failed to store_to_binary in command" << command);
        return LEVIN_ERROR_INTERNAL;
      }

      return res;
    };

    template<class t_owner, class t_in_type, class t_context, class callback_t>
    int buff_to_t_adapter(t_owner* powner, int command, const std::string& in_buff, callback_t cb, t_context& context)
    {
      serialization::portable_storage strg;
      if(!strg.load_from_binary(in_buff))
      {
        LOG_ERROR("Failed to load_from_binary in notify " << command);
        return LEVIN_ERROR_FORMAT;
      }
      boost::value_initialized<t_in_type> in_struct;
      static_cast<t_in_type&>(in_struct).load(strg);
      int res = LEVIN_ERROR_UNKNOWN_ERROR;
      TRY_ENTRY()
      res = cb(command, in_struct, context);
      CATCH_ENTRY2(LEVIN_ERROR_EXCEPTION)
      return res;
    }; 

#define CHAIN_LEVIN_INVOKE_MAP2(context_type) \
  int invoke(int command, const std::string& in_buff, std::string& buff_out, context_type& context) \
  { \
  bool handled = false; \
  return handle_invoke_map(false, command, in_buff, buff_out, context, handled); \
  } 

#define CHAIN_LEVIN_NOTIFY_MAP2(context_type) \
  int notify(int command, const std::string& in_buff, context_type& context) \
  { \
  bool handled = false; std::string fake_str;\
  return handle_invoke_map(true, command, in_buff, fake_str, context, handled); \
  } 


#define CHAIN_LEVIN_INVOKE_MAP() \
  int invoke(int command, const std::string& in_buff, std::string& buff_out, epee::net_utils::connection_context_base& context) \
  { \
  bool handled = false; \
  return handle_invoke_map(false, command, in_buff, buff_out, context, handled); \
  } 

#define CHAIN_LEVIN_NOTIFY_MAP() \
  int notify(int command, const std::string& in_buff, epee::net_utils::connection_context_base& context) \
  { \
  bool handled = false; std::string fake_str;\
  return handle_invoke_map(true, command, in_buff, fake_str, context, handled); \
  } 

#define CHAIN_LEVIN_NOTIFY_STUB() \
  int notify(int command, const std::string& in_buff, epee::net_utils::connection_context_base& context) \
  { \
  return -1; \
  } 

#define BEGIN_INVOKE_MAP2(owner_type) \
  template <class t_context> int handle_invoke_map(bool is_notify, int command, const std::string& in_buff, std::string& buff_out, t_context& context, bool& handled) \
  { \
  typedef owner_type internal_owner_type_name;

#define HANDLE_INVOKE2(command_id, func, type_name_in, typename_out) \
  if(!is_notify && command_id == command) \
  {handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, type_name_in, typename_out>(this, command, in_buff, buff_out, boost::bind(func, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3, boost::placeholders::_4), context);}

#define HANDLE_INVOKE_T2(COMMAND, func) \
  if(!is_notify && COMMAND::ID == command) \
  {handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, typename COMMAND::request, typename COMMAND::response>(command, in_buff, buff_out, boost::bind(func, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3, boost::placeholders::_4), context);}


#define HANDLE_NOTIFY2(command_id, func, type_name_in) \
  if(is_notify && command_id == command) \
  {handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, type_name_in>(this, command, in_buff, boost::bind(func, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3), context);}

#define HANDLE_NOTIFY_T2(NOTIFY, func) \
  if(is_notify && NOTIFY::ID == command) \
  {handled=true;return epee::net_utils::buff_to_t_adapter<internal_owner_type_name, typename NOTIFY::request>(this, command, in_buff, boost::bind(func, this, boost::placeholders::_1, boost::placeholders::_2, boost::placeholders::_3), context);}


#define CHAIN_INVOKE_MAP2(func) \
  { \
  int res = func(is_notify, command, in_buff, buff_out, context, handled); \
  if(handled) \
  return res; \
  }

#define CHAIN_INVOKE_MAP_TO_OBJ2(obj) \
  { \
  int res = obj.handle_invoke_map(is_notify, command, in_buff, buff_out, context, handled); \
  if(handled) \
  return res; \
  }

#define CHAIN_INVOKE_MAP_TO_OBJ_FORCE_CONTEXT(obj, context_type) \
  { \
  int res = obj.handle_invoke_map(is_notify, command, in_buff, buff_out, static_cast<context_type>(context), handled); \
  if(handled) return res; \
  }


#define END_INVOKE_MAP2() \
  LOG_ERROR("Unkonown command:" << command); \
  return LEVIN_ERROR_CONNECTION_HANDLER_NOT_DEFINED; \
  }
  }
}