horse: use straight front type in racecourse api

mdb/racecourse.go

@@ -140,8 +140,7 @@ func spansslopes(id horse.RacecourseID, evts []courseEvent, length float32) ([]h
 			// Start of the straight.
 			span = horse.RacecourseSpan{
 				Start:    evt.Distance,
-				Straight:    true,
-				FarStraight: evt.Values[1] == 2,
+				Straight: int8(evt.Values[1]),
 			}
 			// Continue out of the switch.
 		}
@@ -154,7 +153,7 @@ func spansslopes(id horse.RacecourseID, evts []courseEvent, length float32) ([]h
 			// Longchamp 1000 (which doesn't appear to actually be used but w/e)
 			// defines straights by their start positions only, so check for the
 			// previous event being a straight with no end.
-			if prev.Straight && prev.End == 0 {
+			if prev.Straight != 0 && prev.End == 0 {
 				spans[len(spans)-1].End = span.Start
 			} else {
 				// Otherwise, insert a new span which is neither straight nor corner.

mdb/racecourse_test.go

@@ -35,7 +35,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    0,
 					End:      649.9000244140625,
-					Straight: true,
+					Straight: 1,
 				},
 				{
 					Start: 649.9000244140625,
@@ -44,7 +44,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    650,
 					End:      1000,
-					Straight: true,
+					Straight: 1,
 				},
 			},
 			Slopes:        []horse.Slope{},
@@ -66,8 +66,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    0,
 					End:      458,
-					Straight:    true,
-					FarStraight: true,
+					Straight: 2,
 				},
 				{
 					Start:  458,
@@ -82,7 +81,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    958,
 					End:      1450,
-					Straight: true,
+					Straight: 1,
 				},
 				{
 					Start:  1450,
@@ -97,8 +96,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    1850,
 					End:      2300,
-					Straight:    true,
-					FarStraight: true,
+					Straight: 2,
 				},
 				{
 					Start:  2300,
@@ -113,7 +111,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    2797,
 					End:      3200,
-					Straight: true,
+					Straight: 1,
 				},
 			},
 			Slopes: []horse.Slope{
@@ -166,7 +164,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    0,
 					End:      500,
-					Straight: true,
+					Straight: 1,
 				},
 				{
 					Start:  500,
@@ -181,8 +179,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    800,
 					End:      1300,
-					Straight:    true,
-					FarStraight: true,
+					Straight: 2,
 				},
 				{
 					Start:  1300,
@@ -197,7 +194,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    1614,
 					End:      2000,
-					Straight: true,
+					Straight: 1,
 				},
 			},
 			Slopes:        []horse.Slope{},
@@ -219,8 +216,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    0,
 					End:      798,
-					Straight:    true,
-					FarStraight: true,
+					Straight: 2,
 				},
 				{
 					Start: 798,
@@ -239,7 +235,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    1600,
 					End:      2400,
-					Straight: true,
+					Straight: 1,
 				},
 			},
 			Slopes:        []horse.Slope{},
@@ -265,7 +261,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    100,
 					End:      500,
-					Straight: true,
+					Straight: 1,
 				},
 				{
 					Start:  500,
@@ -280,8 +276,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    900,
 					End:      1300,
-					Straight:    true,
-					FarStraight: true,
+					Straight: 2,
 				},
 				{
 					Start:  1300,
@@ -296,7 +291,7 @@ func TestRacecourses(t *testing.T) {
 				{
 					Start:    1700,
 					End:      2000,
-					Straight: true,
+					Straight: 1,
 				},
 			},
 			Slopes: []horse.Slope{

race.go

@@ -46,11 +46,9 @@ type RacecourseSpan struct {
 	Start float32 `json:"start"`
 	// End is the distance in meters along the track at which the span ends.
 	End float32 `json:"end"`
-	// Straight is whether the span is formally a straight.
-	Straight bool `json:"straight,omitzero"`
-	// FarStraight is whether the span is the backstretch.
-	// If true, then Straight is also true.
-	FarStraight bool `json:"far_straight,omitzero"`
+	// Straight is the straight type if the span is formally a straight.
+	// 1 indicates the front stretch and 2 the backstretch.
+	Straight int8 `json:"straight,omitzero"`
 	// Corner is the corner number of the span, or zero if not a corner.
 	Corner int8 `json:"corner,omitzero"`
 }