client: Add 'Yes', 'No' property type support

This property type will be used for the argument completion among
the properties that require Yes or No value.

client/properties.c

@@ -29,6 +29,7 @@
 #include "properties.h"
 
 const char *properties_on_off_opts[3] = { "on", "off", NULL };
+const char *properties_yes_no_opts[3] = { "yes", "no", NULL };
 
 bool properties_builder_append_on_off_variant(
 					struct l_dbus_message_builder *builder,
@@ -48,3 +49,22 @@ bool properties_builder_append_on_off_variant(
 
 	return l_dbus_message_builder_append_basic(builder, 'b', &value);
 }
+
+bool properties_builder_append_yes_no_variant(
+					struct l_dbus_message_builder *builder,
+					const char *value_str)
+{
+	bool value;
+
+	if (!builder || !value_str)
+		return false;
+
+	if (!strcmp(value_str, "yes"))
+		value = true;
+	else if (!strcmp(value_str, "no"))
+		value = false;
+	else
+		return false;
+
+	return l_dbus_message_builder_append_basic(builder, 'b', &value);
+}

client/properties.h

@@ -21,7 +21,12 @@
  */
 
 const char *properties_on_off_opts[3];
+const char *properties_yes_no_opts[3];
 
 bool properties_builder_append_on_off_variant(
 					struct l_dbus_message_builder *builder,
 					const char *value_str);
+
+bool properties_builder_append_yes_no_variant(
+					struct l_dbus_message_builder *builder,
+					const char *value_str);