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 backenddb/pg_lookup_webhooks.c
      18              :  * @brief Implementation of the lookup_webhooks function for Postgres
      19              :  * @author Iván Ávalos
      20              :  */
      21              : #include "platform.h"
      22              : #include <taler/taler_error_codes.h>
      23              : #include <taler/taler_dbevents.h>
      24              : #include <taler/taler_pq_lib.h>
      25              : #include "pg_lookup_webhooks.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : /**
      29              :  * Context used for postgres_lookup_webhooks().
      30              :  */
      31              : struct LookupWebhookContext
      32              : {
      33              :   /**
      34              :    * Function to call with the results.
      35              :    */
      36              :   TALER_MERCHANTDB_WebhooksCallback cb;
      37              : 
      38              :   /**
      39              :    * Closure for @a cb.
      40              :    */
      41              :   void *cb_cls;
      42              : 
      43              :   /**
      44              :    * Did database result extraction fail?
      45              :    */
      46              :   bool extract_failed;
      47              : };
      48              : 
      49              : 
      50              : /**
      51              :  * Function to be called with the results of a SELECT statement
      52              :  * that has returned @a num_results results about webhook.
      53              :  *
      54              :  * @param[in,out] cls of type `struct LookupWebhookContext *`
      55              :  * @param result the postgres result
      56              :  * @param num_results the number of results in @a result
      57              :  */
      58              : static void
      59            4 : lookup_webhooks_cb (void *cls,
      60              :                     PGresult *result,
      61              :                     unsigned int num_results)
      62              : {
      63            4 :   struct LookupWebhookContext *wlc = cls;
      64              : 
      65            6 :   for (unsigned int i = 0; i < num_results; i++)
      66              :   {
      67              :     char *webhook_id;
      68              :     char *event_type;
      69            2 :     struct GNUNET_PQ_ResultSpec rs[] = {
      70            2 :       GNUNET_PQ_result_spec_string ("webhook_id",
      71              :                                     &webhook_id),
      72            2 :       GNUNET_PQ_result_spec_string ("event_type",
      73              :                                     &event_type),
      74              :       GNUNET_PQ_result_spec_end
      75              :     };
      76              : 
      77            2 :     if (GNUNET_OK !=
      78            2 :         GNUNET_PQ_extract_result (result,
      79              :                                   rs,
      80              :                                   i))
      81              :     {
      82            0 :       GNUNET_break (0);
      83            0 :       wlc->extract_failed = true;
      84            0 :       return;
      85              :     }
      86            2 :     wlc->cb (wlc->cb_cls,
      87              :              webhook_id,
      88              :              event_type);
      89            2 :     GNUNET_PQ_cleanup_result (rs);
      90              :   }
      91              : }
      92              : 
      93              : 
      94              : enum GNUNET_DB_QueryStatus
      95            4 : TMH_PG_lookup_webhooks (void *cls,
      96              :                         const char *instance_id,
      97              :                         TALER_MERCHANTDB_WebhooksCallback cb,
      98              :                         void *cb_cls)
      99              : {
     100            4 :   struct PostgresClosure *pg = cls;
     101            4 :   struct LookupWebhookContext wlc = {
     102              :     .cb = cb,
     103              :     .cb_cls = cb_cls,
     104              :     /* Can be overwritten by the lookup_webhook_cb */
     105              :     .extract_failed = false,
     106              :   };
     107            4 :   struct GNUNET_PQ_QueryParam params[] = {
     108            4 :     GNUNET_PQ_query_param_string (instance_id),
     109              :     GNUNET_PQ_query_param_end
     110              :   };
     111              :   enum GNUNET_DB_QueryStatus qs;
     112              : 
     113            4 :   check_connection (pg);
     114            4 :   PREPARE (pg,
     115              :            "lookup_webhooks",
     116              :            "SELECT"
     117              :            " webhook_id"
     118              :            ",event_type"
     119              :            " FROM merchant_webhook"
     120              :            " JOIN merchant_instances"
     121              :            "   USING (merchant_serial)"
     122              :            " WHERE merchant_instances.merchant_id=$1");
     123              : 
     124            4 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     125              :                                              "lookup_webhooks",
     126              :                                              params,
     127              :                                              &lookup_webhooks_cb,
     128              :                                              &wlc);
     129              :   /* If there was an error inside lookup_webhook_cb, return a hard error. */
     130            4 :   if (wlc.extract_failed)
     131            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     132            4 :   return qs;
     133              : }