61 lines
1.9 KiB
TypeScript
61 lines
1.9 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Compiler, InjectionToken, Injector, NgModuleFactory, NgModuleFactoryLoader} from '@angular/core';
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import {Observable, from, of } from 'rxjs';
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import {map, mergeMap} from 'rxjs/operators';
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import {LoadChildren, LoadedRouterConfig, Route, standardizeConfig} from './config';
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import {flatten, wrapIntoObservable} from './utils/collection';
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/**
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* The [DI token](guide/glossary/#di-token) for a router configuration.
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* @see `ROUTES`
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* @publicApi
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*/
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export const ROUTES = new InjectionToken<Route[][]>('ROUTES');
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export class RouterConfigLoader {
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constructor(
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private loader: NgModuleFactoryLoader, private compiler: Compiler,
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private onLoadStartListener?: (r: Route) => void,
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private onLoadEndListener?: (r: Route) => void) {}
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load(parentInjector: Injector, route: Route): Observable<LoadedRouterConfig> {
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if (this.onLoadStartListener) {
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this.onLoadStartListener(route);
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}
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const moduleFactory$ = this.loadModuleFactory(route.loadChildren !);
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return moduleFactory$.pipe(map((factory: NgModuleFactory<any>) => {
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if (this.onLoadEndListener) {
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this.onLoadEndListener(route);
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}
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const module = factory.create(parentInjector);
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return new LoadedRouterConfig(
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flatten(module.injector.get(ROUTES)).map(standardizeConfig), module);
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}));
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}
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private loadModuleFactory(loadChildren: LoadChildren): Observable<NgModuleFactory<any>> {
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if (typeof loadChildren === 'string') {
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return from(this.loader.load(loadChildren));
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} else {
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return wrapIntoObservable(loadChildren()).pipe(mergeMap((t: any) => {
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if (t instanceof NgModuleFactory) {
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return of (t);
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} else {
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return from(this.compiler.compileModuleAsync(t));
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}
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}));
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}
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}
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}
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