refactor(handler): extract path matcher for reuse

pkg/handler/handler.go

@@ -126,12 +126,7 @@ func (s *Standalone) GetIngresses() *ingress.Ingresses {
 }
 
 func (s *Standalone) GetPath(r *http.Request) string {
-	path, ok := mw.PathFrom(r.Context())
-	if !ok {
-		path = s.Ingresses.MatchingPath(r)
-	}
-
-	return path
+	return GetPath(r, s)
 }
 
 func (s *Standalone) GetRedirect() url.Redirect {

pkg/handler/path.go

@@ -0,0 +1,23 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/nais/wonderwall/pkg/ingress"
+	mw "github.com/nais/wonderwall/pkg/middleware"
+)
+
+type PathSource interface {
+	GetIngresses() *ingress.Ingresses
+}
+
+// GetPath returns the matching context path from the list of registered ingresses.
+// If none match, an empty string is returned.
+func GetPath(r *http.Request, src PathSource) string {
+	path, ok := mw.PathFrom(r.Context())
+	if !ok {
+		path = src.GetIngresses().MatchingPath(r)
+	}
+
+	return path
+}