1 files changed, 159 insertions, 0 deletions
diff --git a/src/backenddb/pg_select_accounts.c b/src/backenddb/pg_select_accounts.c
new file mode 100644
index 00000000..ffb6c4c9
--- /dev/null
+++ b/src/backenddb/pg_select_accounts.c
@@ -0,0 +1,159 @@
+/*
+   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 backenddb/pg_select_accounts.c
+ * @brief Implementation of the select_accounts function for Postgres
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <taler/taler_error_codes.h>
+#include <taler/taler_dbevents.h>
+#include <taler/taler_pq_lib.h>
+#include "pg_select_accounts.h"
+#include "pg_helper.h"
+
+
+/**
+ * Context for select_accounts().
+ */
+struct SelectAccountsContext
+{
+  /**
+   * Function to call with the results.
+   */
+  TALER_MERCHANTDB_AccountCallback cb;
+
+  /**
+   * Closure for @e cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Database context.
+   */
+  struct PostgresClosure *pg;
+
+  /**
+   * Set to the return value on errors.
+   */
+  enum GNUNET_DB_QueryStatus qs;
+
+};
+
+
+/**
+ * Function to be called with the results of a SELECT statement
+ * that has returned @a num_results results about accounts.
+ *
+ * @param cls of type `struct SelectAccountsContext *`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+select_account_cb (void *cls,
+                   PGresult *result,
+                   unsigned int num_results)
+{
+  struct SelectAccountsContext *lic = cls;
+
+  for (unsigned int i = 0; i < num_results; i++)
+  {
+    char *payto;
+    char *facade_url = NULL;
+    json_t *credential = NULL;
+    struct TALER_MERCHANTDB_AccountDetails acc;
+    struct GNUNET_PQ_ResultSpec rs[] = {
+      GNUNET_PQ_result_spec_auto_from_type ("h_wire",
+                                            &acc.h_wire),
+      GNUNET_PQ_result_spec_auto_from_type ("salt",
+                                            &acc.salt),
+      GNUNET_PQ_result_spec_string ("payto_uri",
+                                    &payto),
+      GNUNET_PQ_result_spec_allow_null (
+        GNUNET_PQ_result_spec_string ("credit_facade_url",
+                                      &facade_url),
+        NULL),
+      GNUNET_PQ_result_spec_allow_null (
+        TALER_PQ_result_spec_json ("credit_facade_credentials",
+                                   &credential),
+        NULL),
+      GNUNET_PQ_result_spec_bool ("active",
+                                  &acc.active),
+      GNUNET_PQ_result_spec_end
+    };
+
+    if (GNUNET_OK !=
+        GNUNET_PQ_extract_result (result,
+                                  rs,
+                                  i))
+    {
+      GNUNET_break (0);
+      lic->qs = GNUNET_DB_STATUS_HARD_ERROR;
+      return;
+    }
+    acc.payto_uri = payto;
+    acc.credit_facade_url = facade_url;
+    acc.credit_facade_credentials = credential;
+    lic->cb (lic->cb_cls,
+             &acc);
+    GNUNET_PQ_cleanup_result (rs);
+  }
+}
+
+
+enum GNUNET_DB_QueryStatus
+TMH_PG_select_accounts (void *cls,
+                        const char *id,
+                        TALER_MERCHANTDB_AccountCallback cb,
+                        void *cb_cls)
+{
+  struct PostgresClosure *pg = cls;
+  struct SelectAccountsContext lic = {
+    .cb = cb,
+    .cb_cls = cb_cls,
+    .pg = pg
+  };
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_string (id),
+    GNUNET_PQ_query_param_end
+  };
+  enum GNUNET_DB_QueryStatus qs;
+
+  check_connection (pg);
+  PREPARE (pg,
+           "select_accounts",
+           "SELECT"
+           " h_wire"
+           ",salt"
+           ",payto_uri"
+           ",credit_facade_url"
+           ",credit_facade_credentials"
+           ",active"
+           " FROM merchant_accounts"
+           " WHERE active"
+           "   AND merchant_serial="
+           "     (SELECT merchant_serial "
+           "       FROM merchant_instances"
+           "        WHERE merchant_id=$1);");
+  qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+                                             "select_accounts",
+                                             params,
+                                             &select_account_cb,
+                                             &lic);
+  if (0 > lic.qs)
+    return lic.qs;
+  return qs;
+}