Build routes tree from fragments

build-route-tree-from-fragments.js

buildRoutesTreeFromFragments(urlFragments, routes) {
    if (!routes.filter) {
        throw new Error('Routes should be an array');
    }
    const candidates = routes.filter(route => this.isRouteSuitable(route, urlFragments));
    if (candidates.length === 0) {
        return null;
    } else if (candidates.length === 1) {
        return this.buildRouteObject(candidates[0], urlFragments);
    } else {
        throw new Error(`More than one route corresponds to ${urlFragments.join('/')}`);
    }
}