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/*
This file is part of Anastasis
Copyright (C) 2020, 2021 Anastasis SARL
Anastasis 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.
Anastasis 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
Anastasis; see the file COPYING.GPL. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file include/anastasis_redux.h
* @brief anastasis reducer api
* @author Christian Grothoff
* @author Dominik Meister
* @author Dennis Neufeld
*/
#ifndef ANASTASIS_REDUX_H
#define ANASTASIS_REDUX_H
#include <jansson.h>
#include "anastasis.h"
#include <taler/taler_mhd_lib.h>
#include <regex.h>
/**
* Initialize reducer subsystem.
*
* @param ctx context to use for CURL requests.
*/
void
ANASTASIS_redux_init (struct GNUNET_CURL_Context *ctx);
/**
* Terminate reducer subsystem.
*/
void
ANASTASIS_redux_done (void);
/**
* Returns an initial ANASTASIS backup state.
*
* @return NULL on failure
*/
json_t *
ANASTASIS_backup_start (const struct GNUNET_CONFIGURATION_Handle *cfg);
/**
* Returns an initial ANASTASIS recovery state.
*
* @return NULL on failure
*/
json_t *
ANASTASIS_recovery_start (const struct GNUNET_CONFIGURATION_Handle *cfg);
/**
* Signature of the callback passed to #ANASTASIS_redux_action()
*
* @param cls closure
* @param error error code, #TALER_EC_NONE if @a new_bs is the new successful state
* @param new_state the new state of the operation (client should json_incref() to keep an alias)
*/
typedef void
(*ANASTASIS_ActionCallback)(void *cls,
enum TALER_ErrorCode error,
json_t *new_state);
/**
* Handle to an ongoing action. Only valid until the #ANASTASIS_ActionCallback is invoked.
*/
struct ANASTASIS_ReduxAction;
/**
* Operates on a state. The new state is returned by a callback
* function. This function can do network access to talk to Anastasis
* service providers.
*
* @param state input state
* @param action what action to perform
* @param arguments data for the @a action
* @param cb function to call with the result
* @param cb_cls closure for @a cb
* @return failure state or new state
*/
struct ANASTASIS_ReduxAction *
ANASTASIS_redux_action (const json_t *state,
const char *action,
const json_t *arguments,
ANASTASIS_ActionCallback cb,
void *cb_cls);
/**
* Cancel ongoing redux action.
*
* @param ra action to cancel
*/
void
ANASTASIS_redux_action_cancel (struct ANASTASIS_ReduxAction *ra);
#endif /* _ANASTASIS_REDUX_H */
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