merchant

merchant_api_patch-private-templates-TEMPLATE_ID.c (9198B)

---

 /*
   This file is part of TALER
   Copyright (C) 2022-2026 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 src/lib/merchant_api_patch-private-templates-TEMPLATE_ID.c
  * @brief Implementation of the PATCH /private/templates/$TEMPLATE_ID request
  * @author Christian Grothoff
  */
 #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/patch-private-templates-TEMPLATE_ID.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/templates/$TEMPLATE_ID operation.
  */
 struct TALER_MERCHANT_PatchPrivateTemplateHandle
 {
   /**
    * 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_PatchPrivateTemplateCallback cb;
 
   /**
    * Closure for @a cb.
    */
   TALER_MERCHANT_PATCH_PRIVATE_TEMPLATE_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 template to update.
    */
   char *template_id;
 
   /**
    * New human-readable description.
    */
   char *template_description;
 
   /**
    * New OTP device ID, or NULL to remove association.
    */
   char *otp_id;
 
   /**
    * New template contract (JSON).
    */
   json_t *template_contract;
 
   /**
    * Optional editable defaults (JSON object).
    */
   json_t *editable_defaults;
 };
 
 
 /**
  * Function called when we're done processing the
  * HTTP PATCH /private/templates/$TEMPLATE_ID request.
  *
  * @param cls the `struct TALER_MERCHANT_PatchPrivateTemplateHandle`
  * @param response_code HTTP response code, 0 on error
  * @param response response body, NULL if not in JSON
  */
 static void
 handle_patch_template_finished (void *cls,
                                 long response_code,
                                 const void *response)
 {
   struct TALER_MERCHANT_PatchPrivateTemplateHandle *tph = cls;
   const json_t *json = response;
   struct TALER_MERCHANT_PatchPrivateTemplateResponse tpr = {
     .hr.http_status = (unsigned int) response_code,
     .hr.reply = json
   };
 
   tph->job = NULL;
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "PATCH /private/templates/$TEMPLATE_ID completed with response code %u\n",
               (unsigned int) response_code);
   switch (response_code)
   {
   case 0:
     tpr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_NO_CONTENT:
     break;
   case MHD_HTTP_BAD_REQUEST:
     tpr.hr.ec = TALER_JSON_get_error_code (json);
     tpr.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_break_op (0);
     /* This should never happen, either us
      * or the merchant is buggy (or API version conflict);
      * just pass JSON reply to the application */
     break;
   case MHD_HTTP_UNAUTHORIZED:
     tpr.hr.ec = TALER_JSON_get_error_code (json);
     tpr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Nothing really to verify, merchant says we need to authenticate. */
     break;
   case MHD_HTTP_FORBIDDEN:
     tpr.hr.ec = TALER_JSON_get_error_code (json);
     tpr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_NOT_FOUND:
     tpr.hr.ec = TALER_JSON_get_error_code (json);
     tpr.hr.hint = TALER_JSON_get_error_hint (json);
     break;
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
     tpr.hr.ec = TALER_JSON_get_error_code (json);
     tpr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Server had an internal issue; we should retry,
        but this API leaves this to the application */
     break;
   default:
     TALER_MERCHANT_parse_error_details_ (json,
                                          response_code,
                                          &tpr.hr);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
                 (int) tpr.hr.ec);
     GNUNET_break_op (0);
     break;
   }
   tph->cb (tph->cb_cls,
            &tpr);
   TALER_MERCHANT_patch_private_template_cancel (tph);
 }
 
 
 struct TALER_MERCHANT_PatchPrivateTemplateHandle *
 TALER_MERCHANT_patch_private_template_create (
   struct GNUNET_CURL_Context *ctx,
   const char *url,
   const char *template_id,
   const char *template_description,
   const char *otp_id,
   json_t *template_contract)
 {
   struct TALER_MERCHANT_PatchPrivateTemplateHandle *tph;
 
   tph = GNUNET_new (struct TALER_MERCHANT_PatchPrivateTemplateHandle);
   tph->ctx = ctx;
   tph->base_url = GNUNET_strdup (url);
   tph->template_id = GNUNET_strdup (template_id);
   tph->template_description = GNUNET_strdup (template_description);
   if (NULL != otp_id)
     tph->otp_id = GNUNET_strdup (otp_id);
   tph->template_contract = json_incref (template_contract);
   return tph;
 }
 
 
 enum GNUNET_GenericReturnValue
 TALER_MERCHANT_patch_private_template_set_options_ (
   struct TALER_MERCHANT_PatchPrivateTemplateHandle *tph,
   unsigned int num_options,
   const struct TALER_MERCHANT_PatchPrivateTemplateOptionValue *options)
 {
   for (unsigned int i = 0; i < num_options; i++)
   {
     switch (options[i].option)
     {
     case TALER_MERCHANT_PATCH_PRIVATE_TEMPLATE_OPTION_END:
       return GNUNET_OK;
     case TALER_MERCHANT_PATCH_PRIVATE_TEMPLATE_OPTION_EDITABLE_DEFAULTS:
       tph->editable_defaults
         = json_incref ((json_t *) options[i].details.editable_defaults);
       break;
     default:
       GNUNET_break (0);
       return GNUNET_SYSERR;
     }
   }
   return GNUNET_OK;
 }
 
 
 enum TALER_ErrorCode
 TALER_MERCHANT_patch_private_template_start (
   struct TALER_MERCHANT_PatchPrivateTemplateHandle *tph,
   TALER_MERCHANT_PatchPrivateTemplateCallback cb,
   TALER_MERCHANT_PATCH_PRIVATE_TEMPLATE_RESULT_CLOSURE *cb_cls)
 {
   json_t *req_obj;
   CURL *eh;
 
   tph->cb = cb;
   tph->cb_cls = cb_cls;
   {
     char *path;
 
     GNUNET_asprintf (&path,
                      "private/templates/%s",
                      tph->template_id);
     tph->url = TALER_url_join (tph->base_url,
                                path,
                                NULL);
     GNUNET_free (path);
   }
   if (NULL == tph->url)
     return TALER_EC_GENERIC_CONFIGURATION_INVALID;
   req_obj = GNUNET_JSON_PACK (
     GNUNET_JSON_pack_string ("template_description",
                              tph->template_description),
     GNUNET_JSON_pack_allow_null (
       GNUNET_JSON_pack_string ("otp_id",
                                tph->otp_id)),
     GNUNET_JSON_pack_object_incref ("template_contract",
                                     (json_t *) tph->template_contract),
     GNUNET_JSON_pack_allow_null (
       GNUNET_JSON_pack_object_incref ("editable_defaults",
                                       tph->editable_defaults)));
   eh = TALER_MERCHANT_curl_easy_get_ (tph->url);
   if ( (NULL == eh) ||
        (GNUNET_OK !=
         TALER_curl_easy_post (&tph->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);
   GNUNET_assert (CURLE_OK ==
                  curl_easy_setopt (eh,
                                    CURLOPT_CUSTOMREQUEST,
                                    MHD_HTTP_METHOD_PATCH));
   tph->job = GNUNET_CURL_job_add2 (tph->ctx,
                                    eh,
                                    tph->post_ctx.headers,
                                    &handle_patch_template_finished,
                                    tph);
   if (NULL == tph->job)
     return TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE;
   return TALER_EC_NONE;
 }
 
 
 void
 TALER_MERCHANT_patch_private_template_cancel (
   struct TALER_MERCHANT_PatchPrivateTemplateHandle *tph)
 {
   if (NULL != tph->job)
   {
     GNUNET_CURL_job_cancel (tph->job);
     tph->job = NULL;
   }
   TALER_curl_easy_post_finished (&tph->post_ctx);
   json_decref (tph->template_contract);
   GNUNET_free (tph->url);
   GNUNET_free (tph->base_url);
   GNUNET_free (tph->template_id);
   GNUNET_free (tph->template_description);
   GNUNET_free (tph->otp_id);
   json_decref (tph->editable_defaults);
   GNUNET_free (tph);
 }
 
 
 /* end of merchant_api_patch-private-templates-TEMPLATE_ID-new.c */