From 3493795065b8fde49a5a4c06e5302b2afd03685a Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Sat, 2 May 2020 19:25:05 +0200 Subject: implement /refund handling --- src/lib/merchant_api_post_order_refund.c | 226 +++++++++++++++++++++++++++++++ 1 file changed, 226 insertions(+) create mode 100644 src/lib/merchant_api_post_order_refund.c (limited to 'src/lib/merchant_api_post_order_refund.c') diff --git a/src/lib/merchant_api_post_order_refund.c b/src/lib/merchant_api_post_order_refund.c new file mode 100644 index 00000000..7143e5ba --- /dev/null +++ b/src/lib/merchant_api_post_order_refund.c @@ -0,0 +1,226 @@ +/* + This file is part of TALER + Copyright (C) 2014, 2015, 2016, 2017, 2019, 2020 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_post_order_refund.c + * @brief Implementation of the POST /orders/ID/refund request + * @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 + + +/** + * Handle for a POST /orders/ID/refund operation. + */ +struct TALER_MERCHANT_OrderRefundHandle +{ + /** + * Complete URL where the backend offers /refund + */ + char *url; + + /** + * Minor context that holds body and headers. + */ + struct TALER_CURL_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_RefundCallback cb; + + /** + * Clasure to pass to the callback + */ + void *cb_cls; + + /** + * Handle for the request + */ + struct GNUNET_CURL_Job *job; +}; + + +/** + * Callback to process POST /orders/ID/refund response + * + * @param cls the `struct TALER_MERCHANT_OrderRefundHandle` + * @param response_code HTTP response code, 0 on error + * @param json response body, NULL if not JSON + */ +static void +handle_refund_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_MERCHANT_OrderRefundHandle *orh = cls; + const json_t *json = response; + struct TALER_MERCHANT_HttpResponse hr = { + .http_status = (unsigned int) response_code, + .reply = json + }; + + orh->job = NULL; + switch (response_code) + { + case 0: + hr.ec = TALER_EC_INVALID_RESPONSE; + orh->cb (orh->cb_cls, + &hr); + break; + case MHD_HTTP_OK: + orh->cb (orh->cb_cls, + &hr); + break; + case MHD_HTTP_CONFLICT: + case MHD_HTTP_NOT_FOUND: + hr.ec = TALER_JSON_get_error_code (json); + hr.hint = TALER_JSON_get_error_hint (json); + orh->cb (orh->cb_cls, + &hr); + break; + default: + GNUNET_break_op (0); /* unexpected status code */ + TALER_MERCHANT_parse_error_details_ (json, + response_code, + &hr); + orh->cb (orh->cb_cls, + &hr); + break; + } + TALER_MERCHANT_post_order_refund_cancel (orh); +} + + +/** + * Cancel a POST /orders/ID/refund request. + * + * @param orh the refund increasing operation to cancel + */ +void +TALER_MERCHANT_post_order_refund_cancel ( + struct TALER_MERCHANT_OrderRefundHandle *orh) +{ + if (NULL != orh->job) + { + GNUNET_CURL_job_cancel (orh->job); + orh->job = NULL; + } + TALER_curl_easy_post_finished (&orh->post_ctx); + GNUNET_free (orh->url); + GNUNET_free (orh); +} + + +/** + * Increase the refund granted for an 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_OrderRefundHandle * +TALER_MERCHANT_order_refund (struct GNUNET_CURL_Context *ctx, + const char *backend_url, + const char *order_id, + const struct TALER_Amount *refund, + const char *reason, + TALER_MERCHANT_RefundCallback cb, + void *cb_cls) +{ + struct TALER_MERCHANT_OrderRefundHandle *orh; + json_t *req; + CURL *eh; + + orh = GNUNET_new (struct TALER_MERCHANT_OrderRefundHandle); + orh->ctx = ctx; + orh->cb = cb; + orh->cb_cls = cb_cls; + { + char *path; + + GNUNET_asprintf (&path, + "private/orders/%s/refund", + order_id); + orh->url = TALER_url_join (backend_url, + path, + NULL); + GNUNET_free (path); + } + if (NULL == orh->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (orh); + return NULL; + } + req = json_pack ("{s:o, s:s}", + "refund", TALER_JSON_from_amount (refund), + "reason", reason); + GNUNET_assert (NULL != req); + eh = curl_easy_init (); + GNUNET_assert (NULL != eh); + if (GNUNET_OK != + TALER_curl_easy_post (&orh->post_ctx, + eh, + req)) + { + GNUNET_break (0); + json_decref (req); + GNUNET_free (orh->url); + GNUNET_free (orh); + return NULL; + } + json_decref (req); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_URL, + orh->url)); + orh->job = GNUNET_CURL_job_add2 (ctx, + eh, + orh->post_ctx.headers, + &handle_refund_finished, + orh); + if (NULL == orh->job) + { + GNUNET_free (orh->url); + GNUNET_free (orh); + return NULL; + } + return orh; +} + + +/* end of merchant_api_post_order_refund.c */ -- cgit v1.2.3