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Base system with REST service to issue digital coins, run by the payment service provider
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pg_select_all_kyc_attributes.c (5141B)

      1 /*
      2    This file is part of TALER
      3    Copyright (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 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 exchangedb/pg_select_all_kyc_attributes.c
     18  * @brief Implementation of the select_all_kyc_attributes function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/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_all_kyc_attributes.h"
     26 #include "pg_helper.h"
     27 
     28 /**
     29  * Closure for #get_all_attributes_cb().
     30  */
     31 struct GetAttributesContext
     32 {
     33   /**
     34    * Function to call per result.
     35    */
     36   TALER_EXCHANGEDB_AllAttributesCallback cb;
     37 
     38   /**
     39    * Closure for @e cb.
     40    */
     41   void *cb_cls;
     42 
     43   /**
     44    * Plugin context.
     45    */
     46   struct PostgresClosure *pg;
     47 
     48   /**
     49    * Flag set to #GNUNET_OK as long as everything is fine.
     50    */
     51   enum GNUNET_GenericReturnValue status;
     52 
     53 };
     54 
     55 /**
     56  * Invoke the callback for each result.
     57  *
     58  * @param cls a `struct GetAttributesContext *`
     59  * @param result SQL result
     60  * @param num_results number of rows in @a result
     61  */
     62 static void
     63 get_attributes_cb (void *cls,
     64                    PGresult *result,
     65                    unsigned int num_results)
     66 {
     67   struct GetAttributesContext *ctx = cls;
     68 
     69   for (unsigned int i = 0; i < num_results; i++)
     70   {
     71     uint64_t rowid;
     72     struct GNUNET_TIME_Timestamp collection_time;
     73     struct GNUNET_TIME_Timestamp expiration_time;
     74     struct TALER_NormalizedPaytoHashP h_payto;
     75     json_t *properties = NULL;
     76     size_t enc_attributes_size;
     77     void *enc_attributes;
     78     char *provider;
     79     struct GNUNET_PQ_ResultSpec rs[] = {
     80       GNUNET_PQ_result_spec_string ("provider_name",
     81                                     &provider),
     82       GNUNET_PQ_result_spec_uint64 ("kyc_attributes_serial_id",
     83                                     &rowid),
     84       GNUNET_PQ_result_spec_allow_null (
     85         TALER_PQ_result_spec_json ("jproperties",
     86                                    &properties),
     87         NULL),
     88       GNUNET_PQ_result_spec_timestamp ("collection_time",
     89                                        &collection_time),
     90       GNUNET_PQ_result_spec_timestamp ("expiration_time",
     91                                        &expiration_time),
     92       GNUNET_PQ_result_spec_auto_from_type ("h_payto",
     93                                             &h_payto),
     94       GNUNET_PQ_result_spec_variable_size ("encrypted_attributes",
     95                                            &enc_attributes,
     96                                            &enc_attributes_size),
     97       GNUNET_PQ_result_spec_end
     98     };
     99 
    100     if (GNUNET_OK !=
    101         GNUNET_PQ_extract_result (result,
    102                                   rs,
    103                                   i))
    104     {
    105       GNUNET_break (0);
    106       ctx->status = GNUNET_SYSERR;
    107       return;
    108     }
    109     ctx->cb (ctx->cb_cls,
    110              rowid,
    111              &h_payto,
    112              provider,
    113              collection_time,
    114              expiration_time,
    115              properties,
    116              enc_attributes_size,
    117              enc_attributes);
    118     GNUNET_PQ_cleanup_result (rs);
    119   }
    120 }
    121 
    122 
    123 enum GNUNET_DB_QueryStatus
    124 TEH_PG_select_all_kyc_attributes (
    125   void *cls,
    126   uint64_t min_row_id,
    127   TALER_EXCHANGEDB_AllAttributesCallback cb,
    128   void *cb_cls)
    129 {
    130   struct PostgresClosure *pg = cls;
    131   struct GNUNET_PQ_QueryParam params[] = {
    132     GNUNET_PQ_query_param_uint64 (&min_row_id),
    133     GNUNET_PQ_query_param_end
    134   };
    135   struct GetAttributesContext ctx = {
    136     .cb = cb,
    137     .cb_cls = cb_cls,
    138     .pg = pg,
    139     .status = GNUNET_OK
    140   };
    141   enum GNUNET_DB_QueryStatus qs;
    142 
    143   PREPARE (pg,
    144            "select_all_kyc_attributes",
    145            "SELECT "
    146            " lp.provider_name"
    147            ",ka.h_payto"
    148            ",ka.kyc_attributes_serial_id"
    149            ",lo.jproperties::TEXT"
    150            ",ka.collection_time"
    151            ",ka.expiration_time"
    152            ",ka.encrypted_attributes"
    153            " FROM kyc_attributes ka"
    154            " JOIN legitimization_processes lp"
    155            "   ON (ka.legitimization_serial = lp.legitimization_process_serial_id)"
    156            " LEFT JOIN legitimization_outcomes lo"
    157            "   ON (ka.h_payto = lo.h_payto)"
    158            /* **IF** we joined with 'lo', the lo must be active */
    159            " WHERE COALESCE(lo.is_active,TRUE)"
    160            "   AND kyc_attributes_serial_id > $1"
    161            " ORDER BY kyc_attributes_serial_id ASC"
    162            );
    163   qs = GNUNET_PQ_eval_prepared_multi_select (
    164     pg->conn,
    165     "select_all_kyc_attributes",
    166     params,
    167     &get_attributes_cb,
    168     &ctx);
    169   if (GNUNET_OK != ctx.status)
    170     return GNUNET_DB_STATUS_HARD_ERROR;
    171   return qs;
    172 }