package routepath

import "strings"

// Normalize removes only a complete configured router prefix. Paths
// such as /administrator must not be shortened when the prefix is /admin.
func Normalize(path, routerPrefix string) string {
	prefix := strings.Trim(strings.TrimSpace(routerPrefix), "/")
	if prefix == "" {
		return path
	}
	// Gin also accepts a relative group name such as "api". Normalize it
	// the same way before comparing a request path with Casbin policies.
	prefix = "/" + prefix
	if path == prefix {
		return "/"
	}
	if strings.HasPrefix(path, prefix+"/") {
		return strings.TrimPrefix(path, prefix)
	}
	return path
}