/*
  eXosip - This is the eXtended osip library.
  Copyright (C) 2001-2020 Aymeric MOIZARD amoizard@antisip.com

  eXosip 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 2 of the License, or
  (at your option) any later version.

  eXosip 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 this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  In addition, as a special exception, the copyright holders give
  permission to link the code of portions of this program with the
  OpenSSL library under certain conditions as described in each
  individual source file, and distribute linked combinations
  including the two.
  You must obey the GNU General Public License in all respects
  for all of the code used other than OpenSSL.  If you modify
  file(s) with this exception, you may extend this exception to your
  version of the file(s), but you are not obligated to do so.  If you
  do not wish to do so, delete this exception statement from your
  version.  If you delete this exception statement from all source
  files in the program, then also delete it here.
*/

#ifdef ENABLE_MPATROL
#include <mpatrol.h>
#endif

#ifndef __EX_SUBSCRIBE_H__
#define __EX_SUBSCRIBE_H__

#include <osipparser2/osip_parser.h>
#include <time.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @file eX_subscribe.h
 * @brief eXosip subscribe request API
 *
 * This file provide the API needed to control SUBSCRIBE requests. You can use it to:
 *
 * <ul>
 * <li>build SUBSCRIBE requests.</li>
 * <li>send SUBSCRIBE requests.</li>
 * <li>build SUBSCRIBE answers.</li>
 * <li>send SUBSCRIBE answers.</li>
 * </ul>
 */

/**
 * @defgroup eXosip2_subscribe eXosip2 SUBSCRIBE and outgoing subscriptions
 * @ingroup eXosip2_msg
 * @{
 */

/**
 * Structure for subscription status
 * @enum eXosip_ss
 */
enum eXosip_ss {
  EXOSIP_SUBCRSTATE_UNKNOWN,   /**< unknown subscription-state */
  EXOSIP_SUBCRSTATE_PENDING,   /**< pending subscription-state */
  EXOSIP_SUBCRSTATE_ACTIVE,    /**< active subscription-state */
  EXOSIP_SUBCRSTATE_TERMINATED /**< terminated subscription-state */
};

/**
 * Structure for subscription reason
 * @enum eXosip_ss_reason
 */
enum eXosip_ss_reason {
  DEACTIVATED, /**< deactivated for subscription-state */
  PROBATION,   /**< probation for subscription-state */
  REJECTED,    /**< rejected for subscription-state */
  TIMEOUT,     /**< timeout for subscription-state */
  GIVEUP,      /**< giveup for subscription-state */
  NORESOURCE   /**< noresource for subscription-state */
};

/**
 * Structure for notification status
 * @enum eXosip_ss_status
 */
enum eXosip_ss_status {
  EXOSIP_NOTIFY_UNKNOWN, /**< unknown state for subscription */
  EXOSIP_NOTIFY_PENDING, /**< subscription not yet accepted */
  EXOSIP_NOTIFY_ONLINE,  /**< online status */
  EXOSIP_NOTIFY_BUSY,    /**< busy status */
  EXOSIP_NOTIFY_BERIGHTBACK,
  /**< be right back status */
  EXOSIP_NOTIFY_AWAY,       /**< away status */
  EXOSIP_NOTIFY_ONTHEPHONE, /**< on the phone status */
  EXOSIP_NOTIFY_OUTTOLUNCH, /**< out to lunch status */
  EXOSIP_NOTIFY_CLOSED      /**< closed status */
};

#ifndef MINISIZE

/**
 * Build a default initial SUBSCRIBE request.
 *
 * @param excontext eXosip_t instance.
 * @param subscribe Pointer for the SIP request to build.
 * @param to        SIP url for callee.
 * @param from      SIP url for caller.
 * @param route     Route header for SUBSCRIBE. (optional)
 * @param event     Event header for SUBSCRIBE.
 * @param expires   Expires header for SUBSCRIBE.
 */
int eXosip_subscription_build_initial_subscribe(struct eXosip_t *excontext, osip_message_t **subscribe, const char *to, const char *from, const char *route, const char *event, int expires);

/**
 * Build a default initial REFER request.
 *
 * @param excontext eXosip_t instance.
 * @param refer     Pointer for the SIP request to build.
 * @param to        SIP url for callee.
 * @param from      SIP url for caller.
 * @param route     Route header for REFER. (optional)
 * @param refer_to  SIP url for transfer.
 */
int eXosip_subscription_build_initial_refer(struct eXosip_t *excontext, osip_message_t **refer, const char *to, const char *from, const char *route, const char *refer_to);

/**
 * Send an initial SUBSCRIBE/REFER request.
 *
 * @param excontext    eXosip_t instance.
 * @param subscribe    SIP SUBSCRIBE message to send.
 */
int eXosip_subscription_send_initial_request(struct eXosip_t *excontext, osip_message_t *subscribe);

/**
 * Build a default new SUBSCRIBE/REFER refresh message.
 *
 * @param excontext    eXosip_t instance.
 * @param did          identifier of the subscription.
 * @param sub          Pointer for the SIP request to build.
 */
int eXosip_subscription_build_refresh_request(struct eXosip_t *excontext, int did, osip_message_t **sub);

/**
 * Send a new SUBSCRIBE/REFER refresh request.
 *
 * @param excontext    eXosip_t instance.
 * @param did          identifier of the subscription.
 * @param sub          SIP SUBSCRIBE message to send.
 */
int eXosip_subscription_send_refresh_request(struct eXosip_t *excontext, int did, osip_message_t *sub);

/**
 * Remove outgoing subscription context.
 *
 * @param excontext    eXosip_t instance.
 * @param did          identifier of the subscription.
 */
int eXosip_subscription_remove(struct eXosip_t *excontext, int did);

/** @} */

/**
 * @defgroup eXosip2_notify eXosip2 SUBSCRIBE and incoming subscriptions
 * @ingroup eXosip2_msg
 * @{
 */

/**
 * Build answer for an SUBSCRIBE request.
 *
 * @param excontext    eXosip_t instance.
 * @param tid          id of SUBSCRIBE transaction.
 * @param status       status for SIP answer to build.
 * @param answer       The SIP answer to build.
 */
int eXosip_insubscription_build_answer(struct eXosip_t *excontext, int tid, int status, osip_message_t **answer);

/**
 * Send answer for an SUBSCRIBE request.
 *
 * @param excontext    eXosip_t instance.
 * @param tid          id of SUBSCRIBE transaction.
 * @param status       status for SIP answer to send.
 * @param answer       The SIP answer to send. (default will be sent if NULL)
 */
int eXosip_insubscription_send_answer(struct eXosip_t *excontext, int tid, int status, osip_message_t *answer);

/**
 * Build a request within subscription.
 *
 * @param excontext    eXosip_t instance.
 * @param did          id of incoming subscription.
 * @param method       request method to build.
 * @param request      The SIP request to build.
 */
int eXosip_insubscription_build_request(struct eXosip_t *excontext, int did, const char *method, osip_message_t **request);

/**
 * Build a NOTIFY request within subscription.
 *
 * @param excontext            eXosip_t instance.
 * @param did                  id of incoming subscription.
 * @param subscription_status  subscription status (pending, active, terminated)
 * @param subscription_reason  subscription reason
 * @param request              The SIP request to build.
 */
int eXosip_insubscription_build_notify(struct eXosip_t *excontext, int did, int subscription_status, int subscription_reason, osip_message_t **request);

/**
 * Send a request within subscription.
 *
 * @param excontext    eXosip_t instance.
 * @param did          id of incoming subscription.
 * @param request      The SIP request to send.
 */
int eXosip_insubscription_send_request(struct eXosip_t *excontext, int did, osip_message_t *request);

/**
 * Remove incoming subscription context.
 *
 * @param excontext    eXosip_t instance.
 * @param did          identifier of the subscription.
 */
int eXosip_insubscription_remove(struct eXosip_t *excontext, int did);

#endif

/** @} */

#ifdef __cplusplus
}
#endif
#endif