/*
  This file is part of TALER
  (C) 2018 Taler Systems SA

  TALER is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 3, or
  (at your option) any later version.

  TALER is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public
  License along with TALER; see the file COPYING.  If not, see
  <http://www.gnu.org/licenses/>
*/

/**
 * @file exchange-lib/testing_api_cmd_signal.c
 * @brief command(s) to send signals to processes.
 * @author Marcello Stanisci
 */

#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "exchange_api_handle.h"
#include "taler_testing_lib.h"

struct SignalState
{
  /**
   * The process to send the signal to.
   */
  struct GNUNET_OS_Process *process;

  /**
   * The signal to send to the process.
   */
  int signal;

};

/**
 * Run the command.
 *
 * @param cls closure, typically a #struct SignalState.
 * @param cmd the command to execute, a /wire one.
 * @param is the interpreter state.
 */
void
signal_run (void *cls,
            const struct TALER_TESTING_Command *cmd,
            struct TALER_TESTING_Interpreter *is)
{
  struct SignalState *ss = cls;

  GNUNET_break (0 == GNUNET_OS_process_kill
    (ss->process, ss->signal));
  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Signaling '%d'..\n",
              ss->signal);
  sleep (6);
  TALER_TESTING_interpreter_next (is);
}


/**
 * Cleanup the state.
 *
 * @param cls closure, typically a #struct SignalState.
 * @param cmd the command which is being cleaned up.
 */
void
signal_cleanup (void *cls,
                const struct TALER_TESTING_Command *cmd)
{
  struct SignalState *ss = cls;

  GNUNET_free (ss);
}

/**
 * Send a signal to a process.
 *
 * @param process handle to the process
 * @param signal signal to send
 *
 * @return the command.
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_signal (const char *label,
                          struct GNUNET_OS_Process *process,
                          int signal)
{
  struct SignalState *ss;
  struct TALER_TESTING_Command cmd;

  ss = GNUNET_new (struct SignalState);

  ss->process = process;
  ss->signal = signal;

  cmd.cls = ss;
  cmd.label = label;
  cmd.run = &signal_run;
  cmd.cleanup = &signal_cleanup;

  return cmd;
}