1 files changed, 93 insertions, 0 deletions
diff --git a/src/backenddb/pg_delete_order.c b/src/backenddb/pg_delete_order.c
new file mode 100644
index 00000000..778f4ddd
--- /dev/null
+++ b/src/backenddb/pg_delete_order.c
@@ -0,0 +1,93 @@
+/*
+   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_delete_order.c
+ * @brief Implementation of the delete_order function for Postgres
+ * @author Iván Ávalos
+ */
+#include "platform.h"
+#include <taler/taler_error_codes.h>
+#include <taler/taler_dbevents.h>
+#include <taler/taler_pq_lib.h>
+#include "pg_delete_order.h"
+#include "pg_helper.h"
+
+enum GNUNET_DB_QueryStatus
+TMH_PG_delete_order (void *cls,
+                     const char *instance_id,
+                     const char *order_id,
+                     bool force)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_string (instance_id),
+    GNUNET_PQ_query_param_string (order_id),
+    GNUNET_PQ_query_param_absolute_time (&now),
+    GNUNET_PQ_query_param_bool (force),
+    GNUNET_PQ_query_param_end
+  };
+  struct GNUNET_PQ_QueryParam params2[] = {
+    GNUNET_PQ_query_param_string (instance_id),
+    GNUNET_PQ_query_param_string (order_id),
+    GNUNET_PQ_query_param_end
+  };
+  enum GNUNET_DB_QueryStatus qs;
+  enum GNUNET_DB_QueryStatus qs2;
+
+  check_connection (pg);
+  PREPARE (pg,
+           "delete_order",
+           "WITH ms AS"
+           "(SELECT merchant_serial "
+           "   FROM merchant_instances"
+           "  WHERE merchant_id=$1)"
+           ", mc AS"
+           "(SELECT paid"
+           "   FROM merchant_contract_terms"
+           "   JOIN ms USING (merchant_serial)"
+           "  WHERE order_id=$2) "
+           "DELETE"
+           " FROM merchant_orders mo"
+           " WHERE order_id=$2"
+           "   AND merchant_serial=(SELECT merchant_serial FROM ms)"
+           "   AND (  (pay_deadline < $3)"
+           "       OR (NOT EXISTS (SELECT paid FROM mc))"
+           "       OR ($4 AND (FALSE=(SELECT paid FROM mc))) );");
+  qs = GNUNET_PQ_eval_prepared_non_select (pg->conn,
+                                           "delete_order",
+                                           params);
+  if ( (qs < 0) || (! force) )
+    return qs;
+  PREPARE (pg,
+           "delete_contract",
+           "DELETE"
+           " FROM merchant_contract_terms"
+           " WHERE order_id=$2 AND"
+           "   merchant_serial="
+           "     (SELECT merchant_serial "
+           "        FROM merchant_instances"
+           "        WHERE merchant_id=$1)"
+           "   AND NOT paid;");
+  qs2 = GNUNET_PQ_eval_prepared_non_select (pg->conn,
+                                            "delete_contract",
+                                            params2);
+  if (qs2 < 0)
+    return qs2;
+  if (qs2 > 0)
+    return qs2;
+  return qs;
+}