/*
This file is part of TALER
Copyright (C) 2014, 2015, 2016, 2017, 2019 Taler Systems SA
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
*/
/**
* @file lib/merchant_api_refund.c
* @brief Implementation of the /refund POST and GET
* @author Christian Grothoff
* @author Marcello Stanisci
*/
#include "platform.h"
#include
#include
#include /* just for HTTP status codes */
#include
#include
#include "taler_merchant_service.h"
#include
#include
#include
struct TALER_MERCHANT_RefundIncreaseOperation
{
/**
* Complete URL where the backend offers /refund
*/
char *url;
/**
* Minor context that holds body and headers.
*/
struct TEAH_PostContext post_ctx;
/**
* The CURL context to connect to the backend
*/
struct GNUNET_CURL_Context *ctx;
/**
* The callback to pass the backend response to
*/
TALER_MERCHANT_RefundIncreaseCallback cb;
/**
* Clasure to pass to the callback
*/
void *cb_cls;
/**
* Handle for the request
*/
struct GNUNET_CURL_Job *job;
};
/**
* Callback to process POST /refund response
*
* @param cls the `struct TALER_MERCHANT_RefundIncreaseOperation`
* @param response_code HTTP response code, 0 on error
* @param json response body, NULL if not JSON
*/
static void
handle_refund_increase_finished (void *cls,
long response_code,
const void *response)
{
struct TALER_MERCHANT_RefundIncreaseOperation *rio = cls;
const json_t *json = response;
rio->job = NULL;
switch (response_code)
{
case 0:
rio->cb (rio->cb_cls,
0,
TALER_EC_INVALID_RESPONSE,
NULL);
break;
case MHD_HTTP_OK:
case MHD_HTTP_CONFLICT:
case MHD_HTTP_NOT_FOUND:
rio->cb (rio->cb_cls,
response_code,
TALER_JSON_get_error_code (json),
json);
break;
default:
GNUNET_break_op (0); /* unexpected status code */
rio->cb (rio->cb_cls,
response_code,
TALER_JSON_get_error_code (json),
json);
break;
}
TALER_MERCHANT_refund_increase_cancel (rio);
}
/**
* Cancel a POST /refund request.
*
* @param rio the refund increasing operation to cancel
*/
void
TALER_MERCHANT_refund_increase_cancel (struct
TALER_MERCHANT_RefundIncreaseOperation *
rio)
{
if (NULL != rio->job)
{
GNUNET_CURL_job_cancel (rio->job);
rio->job = NULL;
}
TALER_curl_easy_post_finished (&rio->post_ctx);
GNUNET_free (rio->url);
GNUNET_free (rio);
}
/**
* Increase the refund associated to a order
*
* @param ctx the CURL context used to connect to the backend
* @param backend_url backend's base URL, including final "/"
* @param order_id id of the order whose refund is to be increased
* @param refund amount to which increase the refund
* @param reason human-readable reason justifying the refund
* @param cb callback processing the response from /refund
* @param cb_cls closure for cb
*/
struct TALER_MERCHANT_RefundIncreaseOperation *
TALER_MERCHANT_refund_increase (struct GNUNET_CURL_Context *ctx,
const char *backend_url,
const char *order_id,
const struct TALER_Amount *refund,
const char *reason,
TALER_MERCHANT_RefundIncreaseCallback cb,
void *cb_cls)
{
struct TALER_MERCHANT_RefundIncreaseOperation *rio;
json_t *req;
CURL *eh;
rio = GNUNET_new (struct TALER_MERCHANT_RefundIncreaseOperation);
rio->ctx = ctx;
rio->cb = cb;
rio->cb_cls = cb_cls;
rio->url = TALER_url_join (backend_url,
"refund",
NULL);
if (NULL == rio->url)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Could not construct request URL.\n");
GNUNET_free (rio);
return NULL;
}
req = json_pack ("{s:o, s:s, s:s}",
"refund", TALER_JSON_from_amount (refund),
"order_id", order_id,
"reason", reason);
eh = curl_easy_init ();
if (GNUNET_OK != TALER_curl_easy_post (&rio->post_ctx,
eh,
req))
{
GNUNET_break (0);
json_decref (req);
GNUNET_free (rio->url);
GNUNET_free (rio);
return NULL;
}
json_decref (req);
GNUNET_assert (CURLE_OK == curl_easy_setopt (eh,
CURLOPT_URL,
rio->url));
rio->job = GNUNET_CURL_job_add2
(ctx,
eh,
rio->post_ctx.headers,
&handle_refund_increase_finished,
rio);
if (NULL == rio->job)
{
GNUNET_free (rio->url);
GNUNET_free (rio);
return NULL;
}
return rio;
}