diff options
Diffstat (limited to 'src/lib/merchant_api_refund_increase.c')
| -rw-r--r-- | src/lib/merchant_api_refund_increase.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/lib/merchant_api_refund_increase.c b/src/lib/merchant_api_refund_increase.c new file mode 100644 index 00000000..9cf5124c --- /dev/null +++ b/src/lib/merchant_api_refund_increase.c @@ -0,0 +1,206 @@ +/* + 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 + <http://www.gnu.org/licenses/> +*/ +/** + * @file lib/merchant_api_refund.c + * @brief Implementation of the /refund POST and GET + * @author Christian Grothoff + * @author Marcello Stanisci + */ +#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> +#include <taler/taler_signatures.h> +#include <taler/taler_curl_lib.h> + + +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_BAD_REQUEST: + 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; +} |