Implement support for ValueType VALUE_POINT.

Currently, returning a point fails to parse. RedisGraph implements this value type as a 2-element array (see _ResultSet_CompactReplyWithPoint). In this client implementation, I parse that into a 2-element map[string]float64.

Author: mitchsw

client_test.go

@@ -245,6 +245,22 @@ func TestMap(t *testing.T) {
 	assert.Equal(t, mapval, expected, "expecting a map projection")
 }
 
+func TestPoint(t *testing.T) {
+	createGraph()
+
+	q := "RETURN point({latitude: -33.8567844, longitude: 151.213108})"
+	res, err := graph.Query(q)
+	if err != nil {
+		t.Error(err)
+	}
+	res.Next()
+	r := res.Record()
+	pointval := r.GetByIndex(0).(map[string]float64)
+
+	expected := map[string]float64{"latitude": -33.8567844, "longitude": 151.213108}
+	assert.InDeltaMapValues(t, pointval, expected, 0.001, "expecting a point map")
+}
+
 func TestPath(t *testing.T) {
 	createGraph()
 	q := "MATCH p = (:Person)-[:Visited]->(:Country) RETURN p"

query_result.go

@@ -45,6 +45,7 @@ const (
 	VALUE_NODE
 	VALUE_PATH
 	VALUE_MAP
+	VALUE_POINT
 )
 
 type QueryResultHeader struct {
@@ -241,6 +242,16 @@ func (qr *QueryResult) parseMap(cell interface{}) map[string]interface{} {
 	return parsed_map
 }
 
+func (qr *QueryResult) parsePoint(cell interface{}) map[string]float64 {
+	point := make(map[string]float64)
+	var array = cell.([]interface{})
+	if len(array) == 2 {
+		point["latitude"], _ = redis.Float64(array[0], nil)
+		point["longitude"], _ = redis.Float64(array[1], nil)
+	}
+	return point
+}
+
 func (qr *QueryResult) parseScalar(cell []interface{}) interface{} {
 	t, _ := redis.Int(cell[0], nil)
 	v := cell[1]
@@ -276,6 +287,9 @@ func (qr *QueryResult) parseScalar(cell []interface{}) interface{} {
 	case VALUE_MAP:
 		s = qr.parseMap(v)
 
+	case VALUE_POINT:
+		s = qr.parsePoint(v)
+
 	case VALUE_UNKNOWN:
 		panic("Unknown scalar type\n")
 	}