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/*
This file is part of TALER
Copyright (C) 2014, 2015, 2016 GNUnet e.V. and INRIA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2.1, 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with
TALER; see the file COPYING.LGPL. If not, see
<http://www.gnu.org/licenses/>
*/
/**
* @file lib/merchant_api_contract.c
* @brief Implementation of the /contract request of the merchant's HTTP API
* @author Christian Grothoff
*/
#include "platform.h"
#include <curl/curl.h>
#include <jansson.h>
#include <microhttpd.h> /* just for HTTP status codes */
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_curl_lib.h>
#include "taler_merchant_service.h"
#include <taler/taler_json_lib.h>
/**
* @brief A Contract Operation Handle
*/
struct TALER_MERCHANT_HistoryOperation
{
/**
* The url for this request, including parameters.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Function to call with the result.
*/
TALER_MERCHANT_HistoryOperationCallback cb;
/**
* Closure for @a cb.
*/
void *cb_cls;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
};
/**
* Function called when we're done processing the
* HTTP /track/transaction request.
*
* @param cls the `struct TALER_MERCHANT_TrackTransactionHandle`
* @param response_code HTTP response code, 0 on error
* @param json response body, NULL if not in JSON
*/
static void
history_raw_cb (void *cls,
long response_code,
const json_t *json)
{
}
/**
* Issue a /history request to the backend.
*
* @param ctx execution context
* @param backend_uri base URL of the merchant backend
* @param date only transactions younger than/equals to date will be returned
* @param history_cb callback which will work the response gotten from the backend
* @param history_cb_cls closure to pass to history_cb
* @return handle for this operation, NULL upon errors
*/
struct TALER_MERCHANT_HistoryOperation *
TALER_MERCHANT_history (struct GNUNET_CURL_Context *ctx,
const char *backend_uri,
struct GNUNET_TIME_Absolute date,
TALER_MERCHANT_HistoryOperationCallback history_cb,
void *history_cb_cls)
{
struct TALER_MERCHANT_HistoryOperation *ho;
uint64_t seconds;
CURL *eh;
ho = GNUNET_new (struct TALER_MERCHANT_HistoryOperation);
ho->ctx = ctx;
ho->cb = history_cb;
ho->cb_cls = history_cb_cls;
seconds = date.abs_value_us / 1000LL / 1000LL;
GNUNET_asprintf (&ho->url,
"%s?date=%llu",
backend_uri,
seconds);
eh = curl_easy_init ();
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_URL,
ho->url));
ho->job = GNUNET_CURL_job_add (ctx,
eh,
GNUNET_YES,
&history_raw_cb,
ho);
return ho;
}
/* end of merchant_api_contract.c */
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