Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2023 Taler Systems SA
       4              : 
       5              :    TALER is free software; you can redistribute it and/or modify it under the
       6              :    terms of the GNU General Public License as published by the Free Software
       7              :    Foundation; either version 3, or (at your option) any later version.
       8              : 
       9              :    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10              :    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11              :    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
      12              : 
      13              :    You should have received a copy of the GNU General Public License along with
      14              :    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15              :  */
      16              : /**
      17              :  * @file src/backenddb/iterate_webhooks.c
      18              :  * @brief Implementation of the iterate_webhooks function for Postgres
      19              :  * @author Iván Ávalos
      20              :  */
      21              : #include "platform.h"
      22              : #include <taler/taler_pq_lib.h>
      23              : #include "merchant-database/iterate_webhooks.h"
      24              : #include "helper.h"
      25              : 
      26              : /**
      27              :  * Context used for postgres_lookup_webhooks().
      28              :  */
      29              : struct LookupWebhookContext
      30              : {
      31              :   /**
      32              :    * Function to call with the results.
      33              :    */
      34              :   TALER_MERCHANTDB_WebhooksCallback cb;
      35              : 
      36              :   /**
      37              :    * Closure for @a cb.
      38              :    */
      39              :   void *cb_cls;
      40              : 
      41              :   /**
      42              :    * Did database result extraction fail?
      43              :    */
      44              :   bool extract_failed;
      45              : };
      46              : 
      47              : 
      48              : /**
      49              :  * Function to be called with the results of a SELECT statement
      50              :  * that has returned @a num_results results about webhook.
      51              :  *
      52              :  * @param[in,out] cls of type `struct LookupWebhookContext *`
      53              :  * @param result the postgres result
      54              :  * @param num_results the number of results in @a result
      55              :  */
      56              : static void
      57            6 : lookup_webhooks_cb (void *cls,
      58              :                     PGresult *result,
      59              :                     unsigned int num_results)
      60              : {
      61            6 :   struct LookupWebhookContext *wlc = cls;
      62              : 
      63           12 :   for (unsigned int i = 0; i < num_results; i++)
      64              :   {
      65              :     char *webhook_id;
      66              :     char *event_type;
      67            6 :     struct GNUNET_PQ_ResultSpec rs[] = {
      68            6 :       GNUNET_PQ_result_spec_string ("webhook_id",
      69              :                                     &webhook_id),
      70            6 :       GNUNET_PQ_result_spec_string ("event_type",
      71              :                                     &event_type),
      72              :       GNUNET_PQ_result_spec_end
      73              :     };
      74              : 
      75            6 :     if (GNUNET_OK !=
      76            6 :         GNUNET_PQ_extract_result (result,
      77              :                                   rs,
      78              :                                   i))
      79              :     {
      80            0 :       GNUNET_break (0);
      81            0 :       wlc->extract_failed = true;
      82            0 :       return;
      83              :     }
      84            6 :     wlc->cb (wlc->cb_cls,
      85              :              webhook_id,
      86              :              event_type);
      87            6 :     GNUNET_PQ_cleanup_result (rs);
      88              :   }
      89              : }
      90              : 
      91              : 
      92              : enum GNUNET_DB_QueryStatus
      93            6 : TALER_MERCHANTDB_iterate_webhooks (
      94              :   struct TALER_MERCHANTDB_PostgresContext *pg,
      95              :   const char *instance_id,
      96              :   TALER_MERCHANTDB_WebhooksCallback cb,
      97              :   void *cb_cls)
      98              : {
      99            6 :   struct LookupWebhookContext wlc = {
     100              :     .cb = cb,
     101              :     .cb_cls = cb_cls,
     102              :     /* Can be overwritten by the lookup_webhook_cb */
     103              :     .extract_failed = false,
     104              :   };
     105            6 :   struct GNUNET_PQ_QueryParam params[] = {
     106              :     GNUNET_PQ_query_param_end
     107              :   };
     108              :   enum GNUNET_DB_QueryStatus qs;
     109              : 
     110            6 :   GNUNET_assert (NULL != pg->current_merchant_id);
     111            6 :   GNUNET_assert (0 == strcmp (instance_id,
     112              :                               pg->current_merchant_id));
     113            6 :   TMH_PQ_prepare_anon (pg,
     114              :                        "SELECT"
     115              :                        " webhook_id"
     116              :                        ",event_type"
     117              :                        " FROM merchant_webhook");
     118              : 
     119            6 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     120              :                                              "",
     121              :                                              params,
     122              :                                              &lookup_webhooks_cb,
     123              :                                              &wlc);
     124              :   /* If there was an error inside lookup_webhook_cb, return a hard error. */
     125            6 :   if (wlc.extract_failed)
     126            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     127            6 :   return qs;
     128              : }