1 files changed, 53 insertions, 0 deletions
diff --git a/src/backenddb/pg_update_product.h b/src/backenddb/pg_update_product.h
new file mode 100644
index 00000000..3ad280ef
--- /dev/null
+++ b/src/backenddb/pg_update_product.h
@@ -0,0 +1,53 @@
+/*
+   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_update_product.h
+ * @brief implementation of the update_product function for Postgres
+ * @author Christian Grothoff
+ */
+#ifndef PG_UPDATE_PRODUCT_H
+#define PG_UPDATE_PRODUCT_H
+
+#include <taler/taler_util.h>
+#include <taler/taler_json_lib.h>
+#include "taler_merchantdb_plugin.h"
+
+/**
+ * Update details about a particular product. Note that the
+ * transaction must enforce that the sold/stocked/lost counters
+ * are not reduced (i.e. by expanding the WHERE clause on the existing
+ * values).
+ *
+ * @param cls closure
+ * @param instance_id instance to lookup products for
+ * @param product_id product to lookup
+ * @param[out] pd set to the product details on success, can be NULL
+ *             (in that case we only want to check if the product exists)
+ *             total_sold in @a pd is ignored, total_lost must not
+ *             exceed total_stock minus the existing total_sold;
+ *             total_sold and total_stock must be larger or equal to
+ *             the existing value;
+ * @return database result code, #GNUNET_DB_STATUS_SUCCESS_NO_RESULTS if the
+ *         non-decreasing constraints are not met *or* if the product
+ *         does not yet exist.
+ */
+enum GNUNET_DB_QueryStatus
+TMH_PG_update_product (void *cls,
+                       const char *instance_id,
+                       const char *product_id,
+                       const struct TALER_MERCHANTDB_ProductDetails *pd);
+
+#endif