refactor(srid): Lift CRS/SRS/SRID code to own file - add test

internal/ogc/features/domain/spatialref_test.go

@@ -0,0 +1,49 @@
+package domain
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetOrDefault(t *testing.T) {
+	tests := []struct {
+		name     string
+		srid     SRID
+		expected int
+	}{
+		{"Positive SRID", SRID(28992), 28992},
+		{"Zero SRID", SRID(0), WGS84SRID},
+		{"Negative SRID", SRID(-1), WGS84SRID},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.expected, tt.srid.GetOrDefault())
+		})
+	}
+}
+
+func TestEpsgToSrid(t *testing.T) {
+	tests := []struct {
+		name        string
+		srs         string
+		expected    SRID
+		expectError bool
+	}{
+		{"Valid EPSG", "EPSG:28992", SRID(28992), false},
+		{"Invalid prefix", "INVALID:28992", SRID(-1), true},
+		{"Non-numeric EPSG code", "EPSG:ABC", SRID(-1), true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result, err := EpsgToSrid(tt.srs)
+			if tt.expectError {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tt.expected, result)
+			}
+		})
+	}
+}

internal/ogc/features/main.go

@@ -177,7 +177,7 @@ func (f *Features) Feature() http.HandlerFunc {
 			handleCollectionNotFound(w, collectionID)
 			return
 		}
-		featureID, err := getFeatureID(r)
+		featureID, err := parseFeatureID(r)
 		if err != nil {
 			engine.RenderProblem(engine.ProblemBadRequest, w, err.Error())
 			return
@@ -217,7 +217,7 @@ func (f *Features) Feature() http.HandlerFunc {
 	}
 }
 
-func getFeatureID(r *http.Request) (any, error) {
+func parseFeatureID(r *http.Request) (any, error) {
 	var featureID any
 	featureID, err := uuid.Parse(chi.URLParam(r, "featureId"))
 	if err != nil {