1 files changed, 66 insertions, 0 deletions
diff --git a/src/util/yna.c b/src/util/yna.c
new file mode 100644
index 000000000..6907df675
--- /dev/null
+++ b/src/util/yna.c
@@ -0,0 +1,66 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2020 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 yna.c
+ * @brief Utility functions for yes/no/all filters
+ * @author Jonathan Buchanan
+ */
+#include "platform.h"
+#include "taler_util.h"
+
+
+/**
+ * Convert query argument to @a yna value.
+ *
+ * @param connection connection to take query argument from
+ * @param arg argument to try for
+ * @param default_val value to assign if the argument is not present
+ * @param[out] value to set
+ * @return true on success, false if the parameter was malformed
+ */
+bool
+TALER_arg_to_yna (struct MHD_Connection *connection,
+                  const char *arg,
+                  enum TALER_EXCHANGE_YesNoAll default_val,
+                  enum TALER_EXCHANGE_YesNoAll *yna)
+{
+  const char *str;
+
+  str = MHD_lookup_connection_value (connection,
+                                     MHD_GET_ARGUMENT_KIND,
+                                     arg);
+  if (NULL == str)
+  {
+    *yna = default_val;
+    return true;
+  }
+  if (0 == strcasecmp (str, "yes"))
+  {
+    *yna = TALER_EXCHANGE_YNA_YES;
+    return true;
+  }
+  if (0 == strcasecmp (str, "no"))
+  {
+    *yna = TALER_EXCHANGE_YNA_NO;
+    return true;
+  }
+  if (0 == strcasecmp (str, "all"))
+  {
+    *yna = TALER_EXCHANGE_YNA_ALL;
+    return true;
+  }
+  return false;
+}