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-rw-r--r--src/util/yna.c66
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diff --git a/src/util/yna.c b/src/util/yna.c
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+/*
+ 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;
+}