1 files changed, 129 insertions, 0 deletions
diff --git a/src/exchangedb/pg_iterate_kyc_reference.c b/src/exchangedb/pg_iterate_kyc_reference.c
new file mode 100644
index 000000000..772c51e2c
--- /dev/null
+++ b/src/exchangedb/pg_iterate_kyc_reference.c
@@ -0,0 +1,129 @@
+/*
+   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 pg_iterate_kyc_reference.c
+ * @brief Low-level (statement-level) Postgres database access for the exchange
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_error_codes.h"
+#include "taler_dbevents.h"
+#include "taler_pq_lib.h"
+#include "pg_iterate_kyc_reference.h"
+#include "pg_helper.h"
+
+
+/**
+ * Closure for #iterate_kyc_reference_cb()
+ */
+struct IteratorContext
+{
+  /**
+   * Function to call with the results.
+   */
+  TALER_EXCHANGEDB_LegitimizationProcessCallback cb;
+
+  /**
+   * Closure to pass to @e cb
+   */
+  void *cb_cls;
+
+  /**
+   * Plugin context.
+   */
+  struct PostgresClosure *pg;
+};
+
+
+/**
+ * Helper function for #TEH_PG_iterate_kyc_reference().
+ * Calls the callback with each denomination key.
+ *
+ * @param cls a `struct IteratorContext`
+ * @param result db results
+ * @param num_results number of results in @a result
+ */
+static void
+iterate_kyc_reference_cb (void *cls,
+                          PGresult *result,
+                          unsigned int num_results)
+{
+  struct IteratorContext *ic = cls;
+
+  for (unsigned int i = 0; i<num_results; i++)
+  {
+    char *kyc_provider_section_name;
+    char *provider_user_id;
+    char *legitimization_id;
+    struct GNUNET_PQ_ResultSpec rs[] = {
+      GNUNET_PQ_result_spec_string ("provider_section",
+                                    &kyc_provider_section_name),
+      GNUNET_PQ_result_spec_string ("provider_user_id",
+                                    &provider_user_id),
+      GNUNET_PQ_result_spec_string ("provider_legitimization_id",
+                                    &legitimization_id),
+      GNUNET_PQ_result_spec_end
+    };
+
+    if (GNUNET_OK !=
+        GNUNET_PQ_extract_result (result,
+                                  rs,
+                                  i))
+    {
+      GNUNET_break (0);
+      return;
+    }
+    ic->cb (ic->cb_cls,
+            kyc_provider_section_name,
+            provider_user_id,
+            legitimization_id);
+    GNUNET_PQ_cleanup_result (rs);
+  }
+}
+
+
+enum GNUNET_DB_QueryStatus
+TEH_PG_iterate_kyc_reference (
+  void *cls,
+  const struct TALER_PaytoHashP *h_payto,
+  TALER_EXCHANGEDB_LegitimizationProcessCallback lpc,
+  void *lpc_cls)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_auto_from_type (h_payto),
+    GNUNET_PQ_query_param_end
+  };
+  struct IteratorContext ic = {
+    .cb = lpc,
+    .cb_cls = lpc_cls,
+    .pg = pg
+  };
+
+  PREPARE (pg,
+           "iterate_kyc_reference",
+           "SELECT "
+           " provider_section"
+           ",provider_user_id"
+           ",provider_legitimization_id"
+           " FROM legitimization_processes"
+           " WHERE h_payto=$1;");
+  return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+                                               "iterate_kyc_reference",
+                                               params,
+                                               &iterate_kyc_reference_cb,
+                                               &ic);
+}