Fiber golang example of showing child routes a la Django Rest Framework (could be improved)

routes.go

package routes

import (
	"sort"
	"strings"

	"github.com/gofiber/fiber/v2"
)

func Register(app *fiber.App) *fiber.App {

	listChildRoutes := func(c *fiber.Ctx) error {
		routeList := getRouteChildren(c.Route().Path, app.Stack())
		return c.JSON(fiber.Map{
			"success":  true,
			"children": routeList,
		})
	}

	app.Get("/", listChildRoutes)

	api := app.Group("/api")
	api.Get("/", listChildRoutes)

	v1 := api.Group("/v1")
	v1.Get("/", listChildRoutes)

	responders := v1.Group("/responders")
	responders.Get("/", listChildRoutes)

	return app
}

func getRouteChildren(currentRoute string, routeStack [][]*fiber.Route) []string {
	currentRoute = normaliseRoute(currentRoute)
	getMethodList := routeStack[0] // First entry contains GET routes, second contains POST etc
	childRoutes := []string{}
	currRouteLen := 0

	if currentRoute != "/" {
		currRouteLen = len(strings.Split(currentRoute, "/")) - 1 // -1 to ignore whitespace from string split
	}

	for _, route := range getMethodList {
		path := normaliseRoute(route.Path)
		if path == currentRoute {
			continue
		}
		routeLength := len(strings.Split(path, "/")) - 1
		if strings.Contains(path, currentRoute) && currRouteLen+1 == routeLength {
			childRoutes = append(childRoutes, path)
		}
	}

	sort.Strings(childRoutes)

	return childRoutes
}

func normaliseRoute(route string) string {
	// Annoyingly, if you register "/api" and "/api/", the trailing slash isn't removed internally
	if route == "/" {
		return route
	}
	lastChar := route[len(route)-1:]
	if lastChar == "/" {
		route = route[0 : len(route)-1]
	}
	return route
}