merchant

Merchant backend to process payments, run by merchants
Log | Files | Refs | Submodules | README | LICENSE

lookup_webhooks.c (3722B)

      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/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_pq_lib.h>
     23 #include "merchant-database/lookup_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 lookup_webhooks_cb (void *cls,
     58                     PGresult *result,
     59                     unsigned int num_results)
     60 {
     61   struct LookupWebhookContext *wlc = cls;
     62 
     63   for (unsigned int i = 0; i < num_results; i++)
     64   {
     65     char *webhook_id;
     66     char *event_type;
     67     struct GNUNET_PQ_ResultSpec rs[] = {
     68       GNUNET_PQ_result_spec_string ("webhook_id",
     69                                     &webhook_id),
     70       GNUNET_PQ_result_spec_string ("event_type",
     71                                     &event_type),
     72       GNUNET_PQ_result_spec_end
     73     };
     74 
     75     if (GNUNET_OK !=
     76         GNUNET_PQ_extract_result (result,
     77                                   rs,
     78                                   i))
     79     {
     80       GNUNET_break (0);
     81       wlc->extract_failed = true;
     82       return;
     83     }
     84     wlc->cb (wlc->cb_cls,
     85              webhook_id,
     86              event_type);
     87     GNUNET_PQ_cleanup_result (rs);
     88   }
     89 }
     90 
     91 
     92 enum GNUNET_DB_QueryStatus
     93 TALER_MERCHANTDB_lookup_webhooks (
     94   struct TALER_MERCHANTDB_PostgresContext *pg,
     95   const char *instance_id,
     96   TALER_MERCHANTDB_WebhooksCallback cb,
     97   void *cb_cls)
     98 {
     99   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   struct GNUNET_PQ_QueryParam params[] = {
    106     GNUNET_PQ_query_param_end
    107   };
    108   enum GNUNET_DB_QueryStatus qs;
    109 
    110   GNUNET_assert (NULL != pg->current_merchant_id);
    111   GNUNET_assert (0 == strcmp (instance_id,
    112                               pg->current_merchant_id));
    113   check_connection (pg);
    114   TMH_PQ_prepare_anon (pg,
    115                        "SELECT"
    116                        " webhook_id"
    117                        ",event_type"
    118                        " FROM merchant_webhook");
    119 
    120   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
    121                                              "",
    122                                              params,
    123                                              &lookup_webhooks_cb,
    124                                              &wlc);
    125   /* If there was an error inside lookup_webhook_cb, return a hard error. */
    126   if (wlc.extract_failed)
    127     return GNUNET_DB_STATUS_HARD_ERROR;
    128   return qs;
    129 }