merchant

Merchant backend to process payments, run by merchants
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taler-merchant-httpd_get-units.c (4231B)

      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 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/backend/taler-merchant-httpd_get-units.c
     18  * @brief implement GET /units and shared unit list response
     19  * @author Bohdan Potuzhnyi
     20  */
     21 #include "platform.h"
     22 #include "taler-merchant-httpd_get-units.h"
     23 #include "merchant-database/iterate_units.h"
     24 
     25 
     26 /**
     27  * Context for building a unit list response.
     28  */
     29 struct UnitListContext
     30 {
     31   /**
     32    * Unit definitions to return.
     33    */
     34   json_t *units;
     35 
     36   /**
     37    * Omit inactive units from the public catalogue.
     38    */
     39   bool active_only;
     40 };
     41 
     42 
     43 /**
     44  * Add unit details to the response array.
     45  *
     46  * @param cls a `struct UnitListContext *`
     47  * @param unit_serial serial number of the unit
     48  * @param ud unit details
     49  */
     50 static void
     51 add_unit (void *cls,
     52           uint64_t unit_serial,
     53           const struct TALER_MERCHANTDB_UnitDetails *ud)
     54 {
     55   const struct UnitListContext *ulc = cls;
     56   json_t *ua = ulc->units;
     57 
     58   if (ulc->active_only &&
     59       (! ud->unit_active))
     60     return;
     61 
     62   GNUNET_assert (
     63     0 ==
     64     json_array_append_new (
     65       ua,
     66       GNUNET_JSON_PACK (
     67         GNUNET_JSON_pack_uint64 ("unit_serial",
     68                                  unit_serial),
     69         GNUNET_JSON_pack_string ("unit",
     70                                  ud->unit),
     71         GNUNET_JSON_pack_string ("unit_name_long",
     72                                  ud->unit_name_long),
     73         GNUNET_JSON_pack_object_incref ("unit_name_long_i18n",
     74                                         (json_t *) ud->unit_name_long_i18n),
     75         GNUNET_JSON_pack_string ("unit_name_short",
     76                                  ud->unit_name_short),
     77         GNUNET_JSON_pack_object_incref ("unit_name_short_i18n",
     78                                         (json_t *) ud->unit_name_short_i18n),
     79         GNUNET_JSON_pack_bool ("unit_allow_fraction",
     80                                ud->unit_allow_fraction),
     81         GNUNET_JSON_pack_uint64 ("unit_precision_level",
     82                                  ud->unit_precision_level),
     83         GNUNET_JSON_pack_bool ("unit_active",
     84                                ud->unit_active),
     85         GNUNET_JSON_pack_bool ("unit_builtin",
     86                                ud->unit_builtin))));
     87 }
     88 
     89 
     90 enum MHD_Result
     91 TMH_reply_units (struct MHD_Connection *connection,
     92                  struct TMH_HandlerContext *hc,
     93                  bool active_only)
     94 {
     95   struct UnitListContext ulc = {
     96     .units = json_array (),
     97     .active_only = active_only
     98   };
     99   enum GNUNET_DB_QueryStatus qs;
    100 
    101   GNUNET_assert (NULL != ulc.units);
    102   qs = TALER_MERCHANTDB_iterate_units (TMH_db,
    103                                        hc->instance->settings.id,
    104                                        &add_unit,
    105                                        &ulc);
    106   if (0 > qs)
    107   {
    108     GNUNET_break (0);
    109     json_decref (ulc.units);
    110     return TALER_MHD_reply_with_error (connection,
    111                                        MHD_HTTP_INTERNAL_SERVER_ERROR,
    112                                        TALER_EC_GENERIC_DB_FETCH_FAILED,
    113                                        NULL);
    114   }
    115   return TALER_MHD_REPLY_JSON_PACK (connection,
    116                                     MHD_HTTP_OK,
    117                                     GNUNET_JSON_pack_array_steal ("units",
    118                                                                   ulc.units));
    119 }
    120 
    121 
    122 enum MHD_Result
    123 TMH_get_units (const struct TMH_RequestHandler *rh,
    124                struct MHD_Connection *connection,
    125                struct TMH_HandlerContext *hc)
    126 {
    127   (void) rh;
    128   return TMH_reply_units (connection,
    129                           hc,
    130                           true);
    131 }
    132 
    133 
    134 /* end of taler-merchant-httpd_get-units.c */