Line data    Source code

       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2024 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_select_category.c
      18             :  * @brief Implementation of the select_category function for Postgres
      19             :  * @author Christian Grothoff
      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_select_category.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : enum GNUNET_DB_QueryStatus
      30           0 : TMH_PG_select_category (
      31             :   void *cls,
      32             :   const char *instance_id,
      33             :   uint64_t category_id,
      34             :   struct TALER_MERCHANTDB_CategoryDetails *cd,
      35             :   size_t *num_products,
      36             :   char **products)
      37             : {
      38           0 :   struct PostgresClosure *pg = cls;
      39           0 :   struct GNUNET_PQ_QueryParam params[] = {
      40           0 :     GNUNET_PQ_query_param_string (instance_id),
      41           0 :     GNUNET_PQ_query_param_uint64 (&category_id),
      42             :     GNUNET_PQ_query_param_end
      43             :   };
      44             : 
      45           0 :   if (NULL == cd)
      46             :   {
      47           0 :     struct GNUNET_PQ_ResultSpec rs_null[] = {
      48             :       GNUNET_PQ_result_spec_end
      49             :     };
      50             : 
      51           0 :     check_connection (pg);
      52           0 :     return GNUNET_PQ_eval_prepared_singleton_select (
      53             :       pg->conn,
      54             :       "select_category",
      55             :       params,
      56             :       rs_null);
      57             :   }
      58             :   else
      59             :   {
      60           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      61           0 :       GNUNET_PQ_result_spec_string ("category_name",
      62             :                                     &cd->category_name),
      63           0 :       TALER_PQ_result_spec_json ("category_name_i18n",
      64             :                                  &cd->category_name_i18n),
      65           0 :       GNUNET_PQ_result_spec_array_string (pg->conn,
      66             :                                           "products",
      67             :                                           num_products,
      68             :                                           products),
      69             :       GNUNET_PQ_result_spec_end
      70             :     };
      71             : 
      72           0 :     PREPARE (pg,
      73             :              "select_category",
      74             :              "SELECT"
      75             :              " category_name"
      76             :              ",category_name_i18n"
      77             :              ",t.product_array AS products"
      78             :              " FROM merchant_categories mc"
      79             :              " JOIN merchant_instances inst"
      80             :              "   USING (merchant_serial)"
      81             :              ",LATERAL ("
      82             :              "   SELECT ARRAY ("
      83             :              "     SELECT "
      84             :              "         mi.product_id AS product_id"
      85             :              "       FROM merchant_product_categories mpc"
      86             :              "       JOIN merchant_inventory mi"
      87             :              "          USING (product_serial)"
      88             :              "      WHERE mpc.category_serial = mc.category_serial"
      89             :              "   ) AS product_array"
      90             :              " ) t"
      91             :              " WHERE inst.merchant_id=$1"
      92             :              "   AND mc.category_serial=$2");
      93           0 :     check_connection (pg);
      94           0 :     return GNUNET_PQ_eval_prepared_singleton_select (
      95             :       pg->conn,
      96             :       "select_category",
      97             :       params,
      98             :       rs);
      99             :   }
     100             : }