49 lines
1.7 KiB
TypeScript
49 lines
1.7 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 'rxjs/add/operator/map';
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import 'rxjs/add/operator/toPromise';
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import {ComponentResolver} from '@angular/core';
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import {Observable} from 'rxjs/Observable';
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import {forkJoin} from 'rxjs/observable/forkJoin';
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import {fromPromise} from 'rxjs/observable/fromPromise';
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import {ActivatedRouteSnapshot, RouterStateSnapshot} from './router_state';
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import {TreeNode} from './utils/tree';
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export function resolve(
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resolver: ComponentResolver, state: RouterStateSnapshot): Observable<RouterStateSnapshot> {
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return resolveNode(resolver, state._root).map(_ => state);
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}
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function resolveNode(
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resolver: ComponentResolver, node: TreeNode<ActivatedRouteSnapshot>): Observable<any> {
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if (node.children.length === 0) {
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return fromPromise(resolveComponent(resolver, <any>node.value).then(factory => {
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node.value._resolvedComponentFactory = factory;
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return node.value;
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}));
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} else {
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const c = node.children.map(c => resolveNode(resolver, c).toPromise());
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return forkJoin(c).map(_ => resolveComponent(resolver, <any>node.value).then(factory => {
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node.value._resolvedComponentFactory = factory;
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return node.value;
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}));
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}
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}
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function resolveComponent(
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resolver: ComponentResolver, snapshot: ActivatedRouteSnapshot): Promise<any> {
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if (snapshot.component && snapshot._routeConfig && typeof snapshot.component === 'string') {
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return resolver.resolveComponent(<any>snapshot.component);
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} else {
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return Promise.resolve(null);
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}
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} |