graycoreio/daffodil

import {
  Inject,
  Injectable,
} from '@angular/core';
import {
  Router,
  Route,
} from '@angular/router';


import { daffInsertRouteBeforeWildCardStrategy } from './strategies/insert-route-before-wildcard';
import { DaffExternalRouterNoWildcardError } from '../errors/no-wildcard';
import { DaffExternallyResolvableUrl } from '../model/resolvable-route';
import { DaffTypeRoutePair } from '../model/type-route-pair';
import { DAFF_EXTERNAL_ROUTER_ROUTES_RESOLVABLE_BY_TYPE } from '../token/type-resolvable-routes.token';
import { daffTransformResolvedRouteToRoute } from '../transform/resolved-route-to-route';

@Injectable({
  providedIn: 'root',
})
export class DaffExternalRouter {
  constructor(
    private router: Router,
    @Inject(DAFF_EXTERNAL_ROUTER_ROUTES_RESOLVABLE_BY_TYPE)
    private runtimeRoutes: DaffTypeRoutePair[],
  ) { }

  /**
   * Adds a route to the existing router configuration.
   */
  add(resolvedRoute: DaffExternallyResolvableUrl) {
    //Get the route.
    const {
      route,
      insertionStrategy,
    } = daffTransformResolvedRouteToRoute(
      resolvedRoute,
      this.runtimeRoutes,
    );

    try {
      //Add it to configuration.
      this.router.config = (insertionStrategy || daffInsertRouteBeforeWildCardStrategy)(route, this.router.config);
    } catch (e) {
      if (e instanceof DaffExternalRouterNoWildcardError) {
        throw new DaffExternalRouterNoWildcardError(
          `${e.message} This usually means you have misconfigured your routes.`,
        );
      }

      throw e;
    }
  }
}