Merge pull request #101 from spatial-go/fix-100-geojson-decode

fix: FeatureCollection parsing bug

geoencoding/geojson/feature_collection_test.go

@@ -10,6 +10,16 @@ import (
 	"github.com/spatial-go/geoos/space"
 )
 
+func TestFeaturecollectionDecode(t *testing.T) {
+	fc := `{"type":"FeatureCollection","features":[{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[122.993197,41.117725],[122.999399,41.115696],[122.99573,41.109516],[122.987146,41.106994],[122.984775,41.107699],[122.990687,41.117878],[122.993197,41.117725]]]},"properties":{}}]}`
+	encoder := Encoder{}
+	geom, err := encoder.Decode([]byte(fc))
+	if err != nil {
+		t.Fatalf("should unmarshal feature collection without issue, err %v", err)
+	}
+	println(geom)
+}
+
 func TestNewFeatureCollection(t *testing.T) {
 	fc := NewFeatureCollection()
 

geoencoding/geojson/geojson_encoder.go

@@ -22,7 +22,7 @@ func (e *Encoder) Encode(g space.Geometry) []byte {
 
 // Decode Returns geometry of that decode string by codeType.
 func (e *Encoder) Decode(s []byte) (space.Geometry, error) {
-	if strings.Contains(string(s[9:20]), "FeatureCollection") {
+	if strings.Contains(string(s), "\"type\":\"FeatureCollection\"") {
 		colls, err := UnmarshalFeatureCollection(s)
 		if err != nil {
 			log.Println(err)
@@ -33,7 +33,7 @@ func (e *Encoder) Decode(s []byte) (space.Geometry, error) {
 			geom = append(geom, v.Geometry.Geometry())
 		}
 		return geom, nil
-	} else if strings.Contains(string(s[9:20]), "Feature") {
+		} else if strings.Contains(string(s), "\"type\":\"Feature\"") {
 		feat, err := UnmarshalFeature(s)
 		if err != nil {
 			log.Println(err)