merchant

merchant_api_patch_unit.c (8013B)

---

 /*
   This file is part of TALER
   Copyright (C) 2025 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_patch_unit.c
  * @brief Implementation of PATCH /private/units/$ID
  * @author Bohdan Potuzhnyi
  */
 #include "platform.h"
 #include <curl/curl.h>
 #include <jansson.h>
 #include <microhttpd.h>
 #include <gnunet/gnunet_util_lib.h>
 #include "taler_merchant_service.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 PATCH /private/units/$ID operation.
  */
 struct TALER_MERCHANT_UnitPatchHandle
 {
   /**
    * Fully qualified request URL.
    */
   char *url;
 
   /**
    * In-flight CURL job.
    */
   struct GNUNET_CURL_Job *job;
 
   /**
    * Completion callback.
    */
   TALER_MERCHANT_UnitPatchCallback cb;
 
   /**
    * Closure for @a cb.
    */
   void *cb_cls;
 
   /**
    * Execution context.
    */
   struct GNUNET_CURL_Context *ctx;
 
   /**
    * Keeps POST body and headers alive.
    */
   struct TALER_CURL_PostContext post_ctx;
 };
 
 
 /**
  * Called when the HTTP transfer finishes.
  *
  * @param cls operation handle
  * @param response_code HTTP status (0 on failure)
  * @param response parsed JSON reply (NULL if unavailable)
  */
 static void
 handle_patch_unit_finished (void *cls,
                             long response_code,
                             const void *response)
 {
   struct TALER_MERCHANT_UnitPatchHandle *uph = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_HttpResponse hr = {
     .http_status = (unsigned int) response_code,
     .reply = json
   };
 
   uph->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "PATCH /private/units completed with status %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_BAD_REQUEST:
   case MHD_HTTP_UNAUTHORIZED:
   case MHD_HTTP_FORBIDDEN:
   case MHD_HTTP_NOT_FOUND:
   case MHD_HTTP_CONFLICT:
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
     hr.ec = TALER_JSON_get_error_code (json);
     hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case 0:
     hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     break;
   default:
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &hr);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response %u/%d for PATCH /private/units\n",
                 (unsigned int) response_code,
                 (int) hr.ec);
     GNUNET_break_op (0);
     break;
   }
   uph->cb (uph->cb_cls,
            &hr);
   TALER_MERCHANT_unit_patch_cancel (uph);
 }
 
 
 struct TALER_MERCHANT_UnitPatchHandle *
 TALER_MERCHANT_unit_patch (struct GNUNET_CURL_Context *ctx,
                            const char *backend_url,
                            const char *unit_id,
                            const char *unit_name_long,
                            const char *unit_name_short,
                            const json_t *unit_name_long_i18n,
                            const json_t *unit_name_short_i18n,
                            const bool *unit_allow_fraction,
                            const uint32_t *unit_precision_level,
                            const bool *unit_active,
                            TALER_MERCHANT_UnitPatchCallback cb,
                            void *cb_cls)
 {
   struct TALER_MERCHANT_UnitPatchHandle *uph;
   json_t *req_obj;
   char *path;
 
   req_obj = json_object ();
   if (NULL == req_obj)
     return NULL;
   if (NULL != unit_name_long)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_name_long",
                                   json_string (unit_name_long)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (NULL != unit_name_short)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_name_short",
                                   json_string (unit_name_short)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (NULL != unit_name_long_i18n)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_name_long_i18n",
                                   json_incref ((json_t *) unit_name_long_i18n)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (NULL != unit_name_short_i18n)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_name_short_i18n",
                                   json_incref (
                                     (json_t *) unit_name_short_i18n)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (NULL != unit_allow_fraction)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_allow_fraction",
                                   json_boolean (*unit_allow_fraction)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (NULL != unit_precision_level)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_precision_level",
                                   json_integer (
                                     (json_int_t) *unit_precision_level)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (NULL != unit_active)
   {
     if (0 != json_object_set_new (req_obj,
                                   "unit_active",
                                   json_boolean (*unit_active)))
     {
       json_decref (req_obj);
       return NULL;
     }
   }
   if (0 == json_object_size (req_obj))
   {
     json_decref (req_obj);
     GNUNET_break (0);
     return NULL;
   }
 
   GNUNET_asprintf (&path,
                    "private/units/%s",
                    unit_id);
   uph = GNUNET_new (struct TALER_MERCHANT_UnitPatchHandle);
   uph->ctx = ctx;
   uph->cb = cb;
   uph->cb_cls = cb_cls;
   uph->url = TALER_url_join (backend_url,
                              path,
                              NULL);
   GNUNET_free (path);
   if (NULL == uph->url)
   {
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Failed to build /private/units/%s URL\n",
                 unit_id);
     json_decref (req_obj);
     GNUNET_free (uph);
     return NULL;
   }
   {
     CURL *eh;
 
     eh = TALER_MERCHANT_curl_easy_get_ (uph->url);
     if (GNUNET_OK !=
         TALER_curl_easy_post (&uph->post_ctx,
                               eh,
                               req_obj))
     {
       GNUNET_break (0);
       curl_easy_cleanup (eh);
       json_decref (req_obj);
       GNUNET_free (uph->url);
       GNUNET_free (uph);
       return NULL;
     }
     json_decref (req_obj);
     GNUNET_assert (CURLE_OK ==
                    curl_easy_setopt (eh,
                                      CURLOPT_CUSTOMREQUEST,
                                      MHD_HTTP_METHOD_PATCH));
     uph->job = GNUNET_CURL_job_add2 (ctx,
                                      eh,
                                      uph->post_ctx.headers,
                                      &handle_patch_unit_finished,
                                      uph);
   }
   return uph;
 }
 
 
 void
 TALER_MERCHANT_unit_patch_cancel (struct TALER_MERCHANT_UnitPatchHandle *uph)
 {
   if (NULL != uph->job)
   {
     GNUNET_CURL_job_cancel (uph->job);
     uph->job = NULL;
   }
   TALER_curl_easy_post_finished (&uph->post_ctx);
   GNUNET_free (uph->url);
   GNUNET_free (uph);
 }
 
 
 /* end of merchant_api_patch_unit.c */