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// Copyright 2025 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// 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.
/**
* @file InputFeedProcessor.hpp
*
*/
#ifndef FASTDDS_EXAMPLES_CPP_RPC__INPUT_FEED_PROCESSOR_HPP
#define FASTDDS_EXAMPLES_CPP_RPC__INPUT_FEED_PROCESSOR_HPP
#include <iostream>
#include <memory>
#include <sstream>
#include <string>
#include <limits>
namespace eprosima {
namespace fastdds {
namespace examples {
namespace rpc {
class InputFeedProcessor
{
public:
enum class Status
{
VALID_INPUT,
INVALID_INPUT,
FEED_CLOSED
};
static std::pair<Status, int32_t> get_input()
{
long long value = 0;
if (!provided_input_feed)
{
std::string line;
if (!std::getline(std::cin, line))
{
EPROSIMA_LOG_ERROR(InputFeedProcessor, "An error occurred while reading the input.");
return std::make_pair(Status::INVALID_INPUT, 0);
}
if (line.empty())
{
EPROSIMA_LOG_INFO(InputFeedProcessor, "Empty input received. Closing feed.");
return std::make_pair(Status::FEED_CLOSED, 0);
}
try
{
value = std::stoll(line);
}
catch (const std::invalid_argument&)
{
EPROSIMA_LOG_ERROR(InputFeedProcessor, "Invalid input: " << line);
return std::make_pair(Status::INVALID_INPUT, 0);
}
catch (const std::out_of_range&)
{
EPROSIMA_LOG_ERROR(InputFeedProcessor, "Input out of range: " << line);
return std::make_pair(Status::INVALID_INPUT, 0);
}
if (value < std::numeric_limits<int32_t>::min() || value > std::numeric_limits<int32_t>::max())
{
return std::make_pair(Status::INVALID_INPUT, 0);
}
}
else
{
try
{
if (provided_input_feed->good() && provided_input_feed->rdbuf()->in_avail())
{
std::string substr;
getline(*provided_input_feed, substr, ',');
try
{
value = std::stoi(substr);
if (value < std::numeric_limits<int32_t>::min() ||
value > std::numeric_limits<int32_t>::max())
{
return std::make_pair(Status::INVALID_INPUT, 0);
}
}
catch (...)
{
return std::make_pair(Status::INVALID_INPUT, 0);
}
}
else
{
return std::make_pair(Status::FEED_CLOSED, 0);
}
}
catch (const std::invalid_argument&)
{
return std::make_pair(Status::INVALID_INPUT, 0);
}
}
return std::make_pair(Status::VALID_INPUT, static_cast<int32_t>(value));
}
static void print_help()
{
std::cout << "Input feed help:" << std::endl;
std::cout << " - Enter a number to process it." << std::endl;
std::cout << " - Press Enter without typing anything to close the input feed." << std::endl;
}
static std::unique_ptr<std::stringstream> provided_input_feed;
};
} // namespace rpc
} // namespace examples
} // namespace fastdds
} // namespace eprosima
#endif // FASTDDS_EXAMPLES_CPP_RPC__INPUT_FEED_PROCESSOR_HPP
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