// UnixIpcBridge.cxx
// SPDX-License-Identifier: GPL-3.0-only
// Author: Unai Blazquez <unaibg2000@gmail.com>
#include "UnixIpcBridge.hpp"

#include <cstring>
#include <stdexcept>

UnixIpcBridge::UnixIpcBridge(const std::string& socket_path)
    : m_socket_path(socket_path)
{
}

void UnixIpcBridge::send(int value)
{
  connect_to_consumer();

  ssize_t n = ::send(m_socket_fd, &value, sizeof(value), 0);
  if (n != sizeof(value))
  {
    close(m_socket_fd);
    m_socket_fd = -1;
    throw std::runtime_error("UnixIpcBridge::send: failed to write value");
  }

  close(m_socket_fd);
  m_socket_fd = -1;
}

void UnixIpcBridge::connect_to_consumer()
{
  m_socket_fd = socket(AF_UNIX, SOCK_STREAM, 0);
  if (m_socket_fd < 0)
  {
    throw std::runtime_error("UnixIpcBridge: socket() failed");
  }

  struct sockaddr_un addr = {};
  addr.sun_family = AF_UNIX;
  std::strncpy(addr.sun_path, m_socket_path.c_str(), sizeof(addr.sun_path) - 1);

  if (connect(m_socket_fd, reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) <
      0)
  {
    close(m_socket_fd);
    m_socket_fd = -1;
    throw std::runtime_error("UnixIpcBridge: connect() failed");
  }
}