merchant

merchant_api_post-private-orders-ORDER_ID-refund.c (7549B)

---

 /*
   This file is part of TALER
   Copyright (C) 2014-2026 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 merchant_api_post-private-orders-ORDER_ID-refund-new.c
  * @brief Implementation of the POST /private/orders/$ORDER_ID/refund request
  * @author Christian Grothoff
  */
 #include "taler/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/taler-merchant/post-private-orders-ORDER_ID-refund.h>
 #include "merchant_api_curl_defaults.h"
 #include "merchant_api_common.h"
 #include <taler/taler_json_lib.h>
 #include <taler/taler_curl_lib.h>
 
 
 /**
  * Handle for a POST /private/orders/$ORDER_ID/refund operation.
  */
 struct TALER_MERCHANT_PostPrivateOrdersRefundHandle
 {
   /**
    * Base URL of the merchant backend.
    */
   char *base_url;
 
   /**
    * The full URL for this request.
    */
   char *url;
 
   /**
    * Handle for the request.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Function to call with the result.
    */
   TALER_MERCHANT_PostPrivateOrdersRefundCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_MERCHANT_POST_PRIVATE_ORDERS_REFUND_RESULT_CLOSURE *cb_cls;
 
   /**
    * Reference to the execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Minor context that holds body and headers.
    */
   struct TALER_CURL_PostContext post_ctx;
 
   /**
    * Identifier of the order to refund.
    */
   char *order_id;
 
   /**
    * Amount to refund.
    */
   struct TALER_Amount refund;
 
   /**
    * Human-readable reason for the refund.
    */
   char *reason;
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP POST /private/orders/$ORDER_ID/refund request.
  *
  * @param cls the `struct TALER_MERCHANT_PostPrivateOrdersRefundHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_refund_finished (void *cls,
                         long response_code,
                         const void *response)
 {
   struct TALER_MERCHANT_PostPrivateOrdersRefundHandle *porh = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_PostPrivateOrdersRefundResponse rr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   porh->job = NULL;
   switch (response_code)
   {
   case 0:
     rr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_OK:
     {
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_string (
           "taler_refund_uri",
           &rr.details.ok.taler_refund_uri),
         GNUNET_JSON_spec_fixed_auto (
           "h_contract",
           &rr.details.ok.h_contract),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
           GNUNET_JSON_parse (json,
                              spec,
                              NULL, NULL))
       {
         GNUNET_break_op (0);
         rr.hr.http_status = 0;
         rr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
         break;
       }
       break;
     }
   case MHD_HTTP_UNAUTHORIZED:
     rr.hr.ec = TALER_JSON_get_error_code (json);
     rr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_FORBIDDEN:
     rr.hr.ec = TALER_JSON_get_error_code (json);
     rr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_NOT_FOUND:
     rr.hr.ec = TALER_JSON_get_error_code (json);
     rr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_CONFLICT:
     rr.hr.ec = TALER_JSON_get_error_code (json);
     rr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_GONE:
     rr.hr.ec = TALER_JSON_get_error_code (json);
     rr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
     rr.hr.ec = TALER_JSON_get_error_code (json);
     rr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   default:
     GNUNET_break_op (0);
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &rr.hr);
     break;
   }
   porh->cb (porh->cb_cls,
             &rr);
   TALER_MERCHANT_post_private_orders_refund_cancel (porh);
 }
 
 
 struct TALER_MERCHANT_PostPrivateOrdersRefundHandle *
 TALER_MERCHANT_post_private_orders_refund_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const char *order_id,
   const struct TALER_Amount *refund,
   const char *reason)
 {
   struct TALER_MERCHANT_PostPrivateOrdersRefundHandle *porh;
 
   porh = GNUNET_new (struct TALER_MERCHANT_PostPrivateOrdersRefundHandle);
   porh->ctx = ctx;
   porh->base_url = GNUNET_strdup (url);
   porh->order_id = GNUNET_strdup (order_id);
   porh->refund = *refund;
   porh->reason = GNUNET_strdup (reason);
   return porh;
 }
 
 
 enum TALER_ErrorCode
 TALER_MERCHANT_post_private_orders_refund_start (
   struct TALER_MERCHANT_PostPrivateOrdersRefundHandle *porh,
   TALER_MERCHANT_PostPrivateOrdersRefundCallback cb,
   TALER_MERCHANT_POST_PRIVATE_ORDERS_REFUND_RESULT_CLOSURE *cb_cls)
 {
   json_t *req_obj;
   CURL *eh;
 
   porh->cb = cb;
   porh->cb_cls = cb_cls;
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "private/orders/%s/refund",
                      porh->order_id);
     porh->url = TALER_url_join (porh->base_url,
                                 path,
                                 NULL);
     GNUNET_free (path);
   }
   if (NULL == porh->url)
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   req_obj = GNUNET_JSON_PACK (
     TALER_JSON_pack_amount ("refund",
                             &porh->refund),
     GNUNET_JSON_pack_string ("reason",
                              porh->reason));
   eh = TALER_MERCHANT_curl_easy_get_ (porh->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&porh->post_ctx,
                               eh,
                               req_obj)) )
   {
     GNUNET_break (0);
     json_decref (req_obj);
     if (NULL != eh)
       curl_easy_cleanup (eh);
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   }
   json_decref (req_obj);
   porh->job = GNUNET_CURL_job_add2 (porh->ctx,
                                     eh,
                                     porh->post_ctx.headers,
                                     &handle_refund_finished,
                                     porh);
   if (NULL == porh->job)
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_MERCHANT_post_private_orders_refund_cancel (
   struct TALER_MERCHANT_PostPrivateOrdersRefundHandle *porh)
 {
   if (NULL != porh->job)
   {
     GNUNET_CURL_job_cancel (porh->job);
     porh->job = NULL;
   }
   TALER_curl_easy_post_finished (&porh->post_ctx);
   GNUNET_free (porh->order_id);
   GNUNET_free (porh->reason);
   GNUNET_free (porh->url);
   GNUNET_free (porh->base_url);
   GNUNET_free (porh);
 }
 
 
 /* end of merchant_api_post-private-orders-ORDER_ID-refund-new.c */