/*
  gpgsetexpirytimeeditinteractor.cpp - Edit Interactor to change the expiry time of an OpenPGP key
  Copyright (C) 2007 Klarälvdalens Datakonsult AB
  2016 Bundesamt für Sicherheit in der Informationstechnik
  Software engineering by Intevation GmbH

  This file is part of GPGME++.

  GPGME++ is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.

  GPGME++ 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 Library General Public License for more details.

  You should have received a copy of the GNU Library General Public License
  along with GPGME++; see the file COPYING.LIB.  If not, write to the
  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.
*/

#ifdef HAVE_CONFIG_H
 #include "config.h"
#endif

#include "gpgsetexpirytimeeditinteractor.h"
#include "error.h"

#include <gpgme.h>

#include <cstring>

using std::strcmp;

// avoid conflict (msvc)
#ifdef ERROR
# undef ERROR
#endif

using namespace GpgME;

GpgSetExpiryTimeEditInteractor::GpgSetExpiryTimeEditInteractor(const std::string &t)
    : EditInteractor(),
      m_strtime(t)
{

}

GpgSetExpiryTimeEditInteractor::~GpgSetExpiryTimeEditInteractor() {}

// work around --enable-final
namespace GpgSetExpiryTimeEditInteractor_Private
{
enum {
    START = EditInteractor::StartState,
    COMMAND,
    DATE,
    QUIT,
    SAVE,

    ERROR = EditInteractor::ErrorState
};
}

const char *GpgSetExpiryTimeEditInteractor::action(Error &err) const
{

    using namespace GpgSetExpiryTimeEditInteractor_Private;

    switch (state()) {
    case COMMAND:
        return "expire";
    case DATE:
        return m_strtime.c_str();
    case QUIT:
        return "quit";
    case SAVE:
        return "Y";
    case START:
    case ERROR:
        return nullptr;
    default:
        err = Error::fromCode(GPG_ERR_GENERAL);
        return nullptr;
    }
}

unsigned int GpgSetExpiryTimeEditInteractor::nextState(unsigned int status, const char *args, Error &err) const
{

    static const Error GENERAL_ERROR  = Error::fromCode(GPG_ERR_GENERAL);
    static const Error INV_TIME_ERROR = Error::fromCode(GPG_ERR_INV_TIME);

    if (needsNoResponse(status)) {
        return state();
    }

    using namespace GpgSetExpiryTimeEditInteractor_Private;

    switch (state()) {
    case START:
        if (status == GPGME_STATUS_GET_LINE &&
                strcmp(args, "keyedit.prompt") == 0) {
            return COMMAND;
        }
        err = GENERAL_ERROR;
        return ERROR;
    case COMMAND:
        if (status == GPGME_STATUS_GET_LINE &&
                strcmp(args, "keygen.valid") == 0) {
            return DATE;
        }
        err = GENERAL_ERROR;
        return ERROR;
    case DATE:
        if (status == GPGME_STATUS_GET_LINE &&
                strcmp(args, "keyedit.prompt") == 0) {
            return QUIT;
        } else if (status == GPGME_STATUS_GET_LINE &&
                   strcmp(args, "keygen.valid")) {
            err = INV_TIME_ERROR;
            return ERROR;
        }
        err = GENERAL_ERROR;
        return ERROR;
    case QUIT:
        if (status == GPGME_STATUS_GET_BOOL &&
                strcmp(args, "keyedit.save.okay") == 0) {
            return SAVE;
        }
        err = GENERAL_ERROR;
        return ERROR;
    case ERROR:
        if (status == GPGME_STATUS_GET_LINE &&
                strcmp(args, "keyedit.prompt") == 0) {
            return QUIT;
        }
        err = lastError();
        return ERROR;
    default:
        err = GENERAL_ERROR;
        return ERROR;
    }
}