diff options
Diffstat (limited to 'src/exchangedb/pg_select_similar_kyc_attributes.c')
-rw-r--r-- | src/exchangedb/pg_select_similar_kyc_attributes.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/exchangedb/pg_select_similar_kyc_attributes.c b/src/exchangedb/pg_select_similar_kyc_attributes.c new file mode 100644 index 000000000..342f9ef33 --- /dev/null +++ b/src/exchangedb/pg_select_similar_kyc_attributes.c @@ -0,0 +1,154 @@ +/* + This file is part of TALER + Copyright (C) 2022 Taler Systems SA + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + TALER is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ +/** + * @file exchangedb/pg_select_similar_kyc_attributes.c + * @brief Implementation of the select_similar_kyc_attributes function for Postgres + * @author Christian Grothoff + */ +#include "platform.h" +#include "taler_error_codes.h" +#include "taler_dbevents.h" +#include "taler_pq_lib.h" +#include "pg_select_similar_kyc_attributes.h" +#include "pg_helper.h" + + +/** + * Closure for #get_similar_attributes_cb(). + */ +struct GetAttributesContext +{ + /** + * Function to call per result. + */ + TALER_EXCHANGEDB_AttributeCallback cb; + + /** + * Closure for @e cb. + */ + void *cb_cls; + + /** + * Plugin context. + */ + struct PostgresClosure *pg; + + /** + * Flag set to #GNUNET_OK as long as everything is fine. + */ + enum GNUNET_GenericReturnValue status; + +}; + + +/** + * Invoke the callback for each result. + * + * @param cls a `struct GetAttributesContext *` + * @param result SQL result + * @param num_results number of rows in @a result + */ +static void +get_attributes_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct GetAttributesContext *ctx = cls; + + for (unsigned int i = 0; i < num_results; i++) + { + struct TALER_PaytoHashP h_payto; + struct GNUNET_TIME_Timestamp collection_time; + struct GNUNET_TIME_Timestamp expiration_time; + size_t enc_attributes_size; + void *enc_attributes; + char *provider; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_auto_from_type ("h_payto", + &h_payto), + GNUNET_PQ_result_spec_string ("provider", + &provider), + GNUNET_PQ_result_spec_timestamp ("collection_time", + &collection_time), + GNUNET_PQ_result_spec_timestamp ("expiration_time", + &expiration_time), + GNUNET_PQ_result_spec_variable_size ("encrypted_attributes", + &enc_attributes, + &enc_attributes_size), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + ctx->status = GNUNET_SYSERR; + return; + } + ctx->cb (ctx->cb_cls, + &h_payto, + provider, + collection_time, + expiration_time, + enc_attributes_size, + enc_attributes); + GNUNET_PQ_cleanup_result (rs); + } +} + + +enum GNUNET_DB_QueryStatus +TEH_PG_select_similar_kyc_attributes ( + void *cls, + const struct GNUNET_ShortHashCode *kyc_prox, + TALER_EXCHANGEDB_AttributeCallback cb, + void *cb_cls) +{ + struct PostgresClosure *pg = cls; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_auto_from_type (kyc_prox), + GNUNET_PQ_query_param_end + }; + struct GetAttributesContext ctx = { + .cb = cb, + .cb_cls = cb_cls, + .pg = pg, + .status = GNUNET_OK + }; + enum GNUNET_DB_QueryStatus qs; + + PREPARE (pg, + "select_similar_kyc_attributes", + "SELECT " + " h_payto" + ",provider" + ",collection_time" + ",expiration_time" + ",encrypted_attributes" + " FROM kyc_attributes" + " WHERE kyc_prox=$1"); + qs = GNUNET_PQ_eval_prepared_multi_select ( + pg->conn, + "select_similar_kyc_attributes", + params, + &get_attributes_cb, + &ctx); + if (GNUNET_OK != ctx.status) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} |