Label roots in route types with parent = -1 (#348)

Avoids parent=0 default zero value

tl/tt/routetypes.go

@@ -2,27 +2,27 @@ package tt
 
 // RouteType contains details on each possible route_type
 type RouteType struct {
- Code int
- Name string
- Category string
- Parent int
+ Code int `json:"code"`
+ Name string `json:"name"`
+ Category string `json:"category"`
+ Parent int `json:"parent"`
 }
 
 // routeTypes is the list of all known extended route_types.
 // See https://developers.google.com/transit/gtfs/reference/extended-route-types
 // All types are mapped back to a basic GTFS primitive.
 // Those that don't fit well are mapped to bus for compatibility.
 var routeTypes = []RouteType{
- {Code: 0, Name: "Tram"},
- {Code: 1, Name: "Metro"},
- {Code: 2, Name: "Rail"},
- {Code: 3, Name: "Bus"},
- {Code: 4, Name: "Ferry"},
- {Code: 5, Name: "Cablecar"},
- {Code: 6, Name: "Gondola"},
- {Code: 7, Name: "Funicular"},
- {Code: 11, Name: "Trolleybus"},
- {Code: 12, Name: "Monorail"},
+ {Code: 0, Name: "Tram", Parent: -1},
+ {Code: 1, Name: "Metro", Parent: -1},
+ {Code: 2, Name: "Rail", Parent: -1},
+ {Code: 3, Name: "Bus", Parent: -1},
+ {Code: 4, Name: "Ferry", Parent: -1},
+ {Code: 5, Name: "Cablecar", Parent: -1},
+ {Code: 6, Name: "Gondola", Parent: -1},
+ {Code: 7, Name: "Funicular", Parent: -1},
+ {Code: 11, Name: "Trolleybus", Parent: -1},
+ {Code: 12, Name: "Monorail", Parent: -1},
 
  {Code: 100, Name: "Railway Service", Parent: 2},
  {Code: 101, Name: "High Speed Rail Service", Parent: 2},

tl/tt/routetypes_test.go

@@ -1,6 +1,7 @@
 package tt
 
 import (
+ "encoding/json"
  "sort"
  "testing"
 )
@@ -46,6 +47,16 @@ func TestGetBasicRouteType(t *testing.T) {
  }
 }
 
+func Test_RouteTypeJson(t *testing.T) {
+ // This test exists only to dump the route type list to json
+ // for use in other applications.
+ jj, err := json.Marshal(routeTypes)
+ if err != nil {
+ t.Fatal(err)
+ }
+ t.Log(string(jj))
+}
+
 func TestGetRouteType(t *testing.T) {
  tests := []struct {
  code int