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::TEXT"
      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              : }