implement GET /products

1 files changed, 96 insertions, 0 deletions

diff --git a/src/backend/taler-merchant-httpd_private-get-products.c b/src/backend/taler-merchant-httpd_private-get-products.c
new file mode 100644
index 00000000..8f70c9fe
--- /dev/null
+++ b/src/backend/taler-merchant-httpd_private-get-products.c
@@ -0,0 +1,96 @@
+/*
+  This file is part of TALER
+  (C) 2019, 2020 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU Affero 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 backend/taler-merchant-httpd_private-get-products.c
+ * @brief implement GET /products
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler-merchant-httpd_private-get-products.h"
+
+
+/**
+ * Add product details to our JSON array.
+ *
+ * @param cls a `json_t *` JSON array to build
+ * @param key unused
+ * @param product_id ID of the product
+ * @param in_stock how many are currently in stock (possibly locked), -1 for infinite
+ * @param unit in which unit is the stock measured in
+ */
+static void
+add_product (void *cls,
+             const struct GNUNET_HashCode *key,
+             const char *product_id,
+             long long in_stock,
+             const char *unit)
+{
+  json_t *pa = cls;
+
+  (void) key;
+  GNUNET_assert (0 ==
+                 json_array_append_new (
+                   pa,
+                   json_pack (
+                     "{s:s, s:I, s:s}",
+                     "product_id",
+                     product_id,
+                     "stock",
+                     (json_int_t) in_stock,
+                     "unit",
+                     unit)));
+}
+
+
+/**
+ * Handle a GET "/products" request.
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] hc context with further information about the request
+ * @return MHD result code
+ */
+MHD_RESULT
+TMH_private_get_products (const struct TMH_RequestHandler *rh,
+                          struct MHD_Connection *connection,
+                          struct TMH_HandlerContext *hc)
+{
+  json_t *pa;
+  enum GNUNET_DB_QueryStatus qs;
+
+  pa = json_array ();
+  GNUNET_assert (NULL != pa);
+  qs = TMH_db->lookup_products (TMH_db->cls,
+                                hc->instance->settings.id,
+                                &add_product,
+                                pa);
+  if (0 > qs)
+  {
+    GNUNET_break (0);
+    json_decref (pa);
+    return TALER_MHD_reply_with_error (connection,
+                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                       TALER_EC_GET_PRODUCTS_DB_LOOKUP_ERROR,
+                                       "failed to lookup products in database");
+  }
+  return TALER_MHD_reply_json_pack (connection,
+                                    MHD_HTTP_OK,
+                                    "{s:o}",
+                                    "products", pa);
+}
+
+
+/* end of taler-merchant-httpd_private-get-products.c */