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_token_families.c
      18             :  * @brief Implementation of the lookup_token_families function for Postgres
      19             :  * @author Christian Blättler
      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_token_families.h"
      26             : #include "pg_helper.h"
      27             : #include "taler_merchantdb_plugin.h"
      28             : 
      29             : 
      30             : /**
      31             :  * Context used for TMH_PG_lookup_token_families().
      32             :  */
      33             : struct LookupTokenFamiliesContext
      34             : {
      35             :   /**
      36             :    * Function to call with the results.
      37             :    */
      38             :   TALER_MERCHANTDB_TokenFamiliesCallback cb;
      39             : 
      40             :   /**
      41             :    * Closure for @a cb.
      42             :    */
      43             :   void *cb_cls;
      44             : 
      45             :   /**
      46             :    * Did database result extraction fail?
      47             :    */
      48             :   bool extract_failed;
      49             : };
      50             : 
      51             : 
      52             : /**
      53             :  * Function to be called with the results of a SELECT statement
      54             :  * that has returned @a num_results results about token families.
      55             :  *
      56             :  * @param[in,out] cls of type `struct LookupTokenFamiliesContext *`
      57             :  * @param result the postgres result
      58             :  * @param num_results the number of results in @a result
      59             :  */
      60             : static void
      61           0 : lookup_token_families_cb (void *cls,
      62             :                           PGresult *result,
      63             :                           unsigned int num_results)
      64             : {
      65           0 :   struct LookupTokenFamiliesContext *tflc = cls;
      66             : 
      67           0 :   for (unsigned int i = 0; i < num_results; i++)
      68             :   {
      69             :     char *slug;
      70             :     char *name;
      71             :     char *kind;
      72             :     struct GNUNET_TIME_Timestamp valid_after;
      73             :     struct GNUNET_TIME_Timestamp valid_before;
      74           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      75           0 :       GNUNET_PQ_result_spec_string ("slug",
      76             :                                     &slug),
      77           0 :       GNUNET_PQ_result_spec_string ("name",
      78             :                                     &name),
      79           0 :       GNUNET_PQ_result_spec_timestamp ("valid_after",
      80             :                                        &valid_after),
      81           0 :       GNUNET_PQ_result_spec_timestamp ("valid_before",
      82             :                                        &valid_before),
      83           0 :       GNUNET_PQ_result_spec_string ("kind",
      84             :                                        &kind),
      85             :       GNUNET_PQ_result_spec_end
      86             :     };
      87             : 
      88           0 :     if (GNUNET_OK !=
      89           0 :         GNUNET_PQ_extract_result (result,
      90             :                                   rs,
      91             :                                   i))
      92             :     {
      93           0 :       GNUNET_break (0);
      94           0 :       tflc->extract_failed = true;
      95           0 :       return;
      96             :     }
      97             : 
      98           0 :     tflc->cb (tflc->cb_cls,
      99             :               slug,
     100             :               name,
     101             :               valid_after,
     102             :               valid_before,
     103             :               kind);
     104           0 :     GNUNET_PQ_cleanup_result (rs);
     105             :   }
     106             : }
     107             : 
     108             : 
     109             : enum GNUNET_DB_QueryStatus
     110           0 : TMH_PG_lookup_token_families (void *cls,
     111             :                               const char *instance_id,
     112             :                               TALER_MERCHANTDB_TokenFamiliesCallback cb,
     113             :                               void *cb_cls)
     114             : {
     115           0 :   struct PostgresClosure *pg = cls;
     116           0 :   struct LookupTokenFamiliesContext context = {
     117             :     .cb = cb,
     118             :     .cb_cls = cb_cls,
     119             :     /* Can be overwritten by the lookup_token_families_cb */
     120             :     .extract_failed = false,
     121             :   };
     122           0 :   struct GNUNET_PQ_QueryParam params[] = {
     123           0 :     GNUNET_PQ_query_param_string (instance_id),
     124             :     GNUNET_PQ_query_param_end
     125             :   };
     126             :   enum GNUNET_DB_QueryStatus qs;
     127             : 
     128           0 :   check_connection (pg);
     129           0 :   PREPARE (pg,
     130             :            "lookup_token_families",
     131             :            "SELECT"
     132             :            " slug"
     133             :            ",name"
     134             :            ",valid_after"
     135             :            ",valid_before"
     136             :            ",kind"
     137             :            " FROM merchant_token_families"
     138             :            " JOIN merchant_instances"
     139             :            "   USING (merchant_serial)"
     140             :            " WHERE merchant_instances.merchant_id=$1");
     141           0 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     142             :                                              "lookup_token_families",
     143             :                                              params,
     144             :                                              &lookup_token_families_cb,
     145             :                                              &context);
     146             :   /* If there was an error inside lookup_token_families_cb, return a hard error. */
     147           0 :   if (context.extract_failed)
     148           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     149           0 :   return qs;
     150             : }