merchant

Merchant backend to process payments, run by merchants
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taler-merchant-httpd_get-private-groups.c (3791B)

      1 /*
      2   This file is part of TALER
      3   (C) 2025 Taler Systems SA
      4 
      5   TALER is free software; you can redistribute it and/or modify it under the
      6   terms of the GNU Affero 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 Affero General Public License for more
     12   details.
     13 
     14   You should have received a copy of the GNU Affero General Public License
     15   along with TALER; see the file COPYING.  If not, see
     16   <http://www.gnu.org/licenses/>
     17 */
     18 /**
     19  * @file taler-merchant-httpd_get-private-groups.c
     20  * @brief implementation of GET /private/groups
     21  * @author Christian Grothoff
     22  */
     23 #include "taler/platform.h"
     24 #include "taler-merchant-httpd_get-private-groups.h"
     25 #include <taler/taler_json_lib.h>
     26 
     27 /**
     28  * Sensible bound on the number of results to return
     29  */
     30 #define MAX_DELTA 1024
     31 
     32 
     33 /**
     34  * Callback for listing product groups.
     35  *
     36  * @param cls closure with a `json_t *`
     37  * @param product_group_id unique identifier of the group
     38  * @param group_name name of the group
     39  * @param group_description human-readable description
     40  */
     41 static void
     42 add_group (void *cls,
     43            uint64_t product_group_id,
     44            const char *group_name,
     45            const char *group_description)
     46 {
     47   json_t *groups = cls;
     48   json_t *entry;
     49 
     50   entry = GNUNET_JSON_PACK (
     51     GNUNET_JSON_pack_uint64 ("group_serial",
     52                              product_group_id),
     53     GNUNET_JSON_pack_string ("group_name",
     54                              group_name),
     55     GNUNET_JSON_pack_string ("description",
     56                              group_description));
     57   GNUNET_assert (NULL != entry);
     58   GNUNET_assert (0 ==
     59                  json_array_append_new (groups,
     60                                         entry));
     61 }
     62 
     63 
     64 MHD_RESULT
     65 TMH_private_get_groups (const struct TMH_RequestHandler *rh,
     66                         struct MHD_Connection *connection,
     67                         struct TMH_HandlerContext *hc)
     68 {
     69   int64_t limit = -20;
     70   uint64_t offset;
     71   json_t *groups;
     72 
     73   (void) rh;
     74   TALER_MHD_parse_request_snumber (connection,
     75                                    "limit",
     76                                    &limit);
     77   if ( (-MAX_DELTA > limit) ||
     78        (limit > MAX_DELTA) )
     79   {
     80     GNUNET_break_op (0);
     81     return TALER_MHD_reply_with_error (connection,
     82                                        MHD_HTTP_BAD_REQUEST,
     83                                        TALER_EC_GENERIC_PARAMETER_MALFORMED,
     84                                        "limit");
     85   }
     86   if (limit > 0)
     87     offset = 0;
     88   else
     89     offset = INT64_MAX;
     90   TALER_MHD_parse_request_number (connection,
     91                                   "offset",
     92                                   &offset);
     93 
     94   groups = json_array ();
     95   GNUNET_assert (NULL != groups);
     96 
     97   {
     98     enum GNUNET_DB_QueryStatus qs;
     99 
    100     qs = TMH_db->select_product_groups (TMH_db->cls,
    101                                         hc->instance->settings.id,
    102                                         limit,
    103                                         offset,
    104                                         &add_group,
    105                                         groups);
    106     if (qs < 0)
    107     {
    108       GNUNET_break (0);
    109       json_decref (groups);
    110       return TALER_MHD_reply_with_error (connection,
    111                                          MHD_HTTP_INTERNAL_SERVER_ERROR,
    112                                          TALER_EC_GENERIC_DB_FETCH_FAILED,
    113                                          "select_product_groups");
    114     }
    115   }
    116 
    117   return TALER_MHD_REPLY_JSON_PACK (
    118     connection,
    119     MHD_HTTP_OK,
    120     GNUNET_JSON_pack_array_steal ("groups",
    121                                   groups));
    122 }