add path param lure customization

Signed-off-by: RonniSkansing <rskansing@gmail.com>

backend/data/lureURL.go

@@ -0,0 +1,21 @@
+package data
+
+const (
+	// LureURLModeQuery carries the recipient identifier as a query parameter,
+	// for example https://example.com/login?id=<uuid>.
+	LureURLModeQuery = "query"
+	// LureURLModePath carries the recipient identifier as the last path
+	// segment, for example https://example.com/login/4H7K9QM2XR3T. This form
+	// survives being read aloud or sent over SMS, where a query string with a
+	// UUID does not.
+	LureURLModePath = "path"
+)
+
+// IsValidLureURLMode reports whether mode is a known lure URL mode.
+func IsValidLureURLMode(mode string) bool {
+	switch mode {
+	case LureURLModeQuery, LureURLModePath:
+		return true
+	}
+	return false
+}