First prototype
diff --git a/inc/Gtfs/Trip/Direction.php b/inc/Gtfs/Trip/Direction.php
new file mode 100644
index 0000000..d446b74
--- /dev/null
+++ b/inc/Gtfs/Trip/Direction.php
@@ -0,0 +1,53 @@
+<?php
+# Generated by the protocol buffer compiler. DO NOT EDIT!
+# source: proto/gtfs.proto
+
+namespace Gtfs\Trip;
+
+use UnexpectedValueException;
+
+/**
+ * The direction_id field contains a binary value that indicates the direction of travel for a trip.
+ *
+ * Protobuf type <code>gtfs.Trip.Direction</code>
+ */
+class Direction
+{
+ /**
+ * Generated from protobuf enum <code>OUTBOUND = 0;</code>
+ */
+ const OUTBOUND = 0;
+ /**
+ * Generated from protobuf enum <code>INBOUND = 1;</code>
+ */
+ const INBOUND = 1;
+
+ private static $valueToName = [
+ self::OUTBOUND => 'OUTBOUND',
+ self::INBOUND => 'INBOUND',
+ ];
+
+ public static function name($value)
+ {
+ if (!isset(self::$valueToName[$value])) {
+ throw new UnexpectedValueException(sprintf(
+ 'Enum %s has no name defined for value %s', __CLASS__, $value));
+ }
+ return self::$valueToName[$value];
+ }
+
+
+ public static function value($name)
+ {
+ $const = __CLASS__ . '::' . strtoupper($name);
+ if (!defined($const)) {
+ throw new UnexpectedValueException(sprintf(
+ 'Enum %s has no value defined for name %s', __CLASS__, $name));
+ }
+ return constant($const);
+ }
+}
+
+// Adding a class alias for backwards compatibility with the previous class name.
+class_alias(Direction::class, \Gtfs\Trip_Direction::class);
+