@angular/router
Version:
Angular - the routing library
389 lines • 68 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { NgModuleRef } from '@angular/core';
import { EmptyError, from, Observable, of } from 'rxjs';
import { catchError, concatAll, every, first, map, mergeMap, tap } from 'rxjs/operators';
import { LoadedRouterConfig } from './config';
import { defaultUrlMatcher, navigationCancelingError, PRIMARY_OUTLET } from './shared';
import { UrlSegmentGroup, UrlTree } from './url_tree';
import { forEach, waitForMap, wrapIntoObservable } from './utils/collection';
import { isCanLoad, isFunction, isUrlTree } from './utils/type_guards';
class NoMatch {
constructor(segmentGroup) {
this.segmentGroup = segmentGroup || null;
}
}
class AbsoluteRedirect {
constructor(urlTree) {
this.urlTree = urlTree;
}
}
function noMatch(segmentGroup) {
return new Observable((obs) => obs.error(new NoMatch(segmentGroup)));
}
function absoluteRedirect(newTree) {
return new Observable((obs) => obs.error(new AbsoluteRedirect(newTree)));
}
function namedOutletsRedirect(redirectTo) {
return new Observable((obs) => obs.error(new Error(`Only absolute redirects can have named outlets. redirectTo: '${redirectTo}'`)));
}
function canLoadFails(route) {
return new Observable((obs) => obs.error(navigationCancelingError(`Cannot load children because the guard of the route "path: '${route.path}'" returned false`)));
}
/**
* Returns the `UrlTree` with the redirection applied.
*
* Lazy modules are loaded along the way.
*/
export function applyRedirects(moduleInjector, configLoader, urlSerializer, urlTree, config) {
return new ApplyRedirects(moduleInjector, configLoader, urlSerializer, urlTree, config).apply();
}
class ApplyRedirects {
constructor(moduleInjector, configLoader, urlSerializer, urlTree, config) {
this.configLoader = configLoader;
this.urlSerializer = urlSerializer;
this.urlTree = urlTree;
this.config = config;
this.allowRedirects = true;
this.ngModule = moduleInjector.get(NgModuleRef);
}
apply() {
const expanded$ = this.expandSegmentGroup(this.ngModule, this.config, this.urlTree.root, PRIMARY_OUTLET);
const urlTrees$ = expanded$.pipe(map((rootSegmentGroup) => this.createUrlTree(rootSegmentGroup, this.urlTree.queryParams, this.urlTree.fragment)));
return urlTrees$.pipe(catchError((e) => {
if (e instanceof AbsoluteRedirect) {
// after an absolute redirect we do not apply any more redirects!
this.allowRedirects = false;
// we need to run matching, so we can fetch all lazy-loaded modules
return this.match(e.urlTree);
}
if (e instanceof NoMatch) {
throw this.noMatchError(e);
}
throw e;
}));
}
match(tree) {
const expanded$ = this.expandSegmentGroup(this.ngModule, this.config, tree.root, PRIMARY_OUTLET);
const mapped$ = expanded$.pipe(map((rootSegmentGroup) => this.createUrlTree(rootSegmentGroup, tree.queryParams, tree.fragment)));
return mapped$.pipe(catchError((e) => {
if (e instanceof NoMatch) {
throw this.noMatchError(e);
}
throw e;
}));
}
noMatchError(e) {
return new Error(`Cannot match any routes. URL Segment: '${e.segmentGroup}'`);
}
createUrlTree(rootCandidate, queryParams, fragment) {
const root = rootCandidate.segments.length > 0 ?
new UrlSegmentGroup([], { [PRIMARY_OUTLET]: rootCandidate }) :
rootCandidate;
return new UrlTree(root, queryParams, fragment);
}
expandSegmentGroup(ngModule, routes, segmentGroup, outlet) {
if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {
return this.expandChildren(ngModule, routes, segmentGroup)
.pipe(map((children) => new UrlSegmentGroup([], children)));
}
return this.expandSegment(ngModule, segmentGroup, routes, segmentGroup.segments, outlet, true);
}
// Recursively expand segment groups for all the child outlets
expandChildren(ngModule, routes, segmentGroup) {
return waitForMap(segmentGroup.children, (childOutlet, child) => this.expandSegmentGroup(ngModule, routes, child, childOutlet));
}
expandSegment(ngModule, segmentGroup, routes, segments, outlet, allowRedirects) {
return of(...routes).pipe(map((r) => {
const expanded$ = this.expandSegmentAgainstRoute(ngModule, segmentGroup, routes, r, segments, outlet, allowRedirects);
return expanded$.pipe(catchError((e) => {
if (e instanceof NoMatch) {
// TODO(i): this return type doesn't match the declared Observable<UrlSegmentGroup> -
// talk to Jason
return of(null);
}
throw e;
}));
}), concatAll(), first((s) => !!s), catchError((e, _) => {
if (e instanceof EmptyError || e.name === 'EmptyError') {
if (this.noLeftoversInUrl(segmentGroup, segments, outlet)) {
return of(new UrlSegmentGroup([], {}));
}
throw new NoMatch(segmentGroup);
}
throw e;
}));
}
noLeftoversInUrl(segmentGroup, segments, outlet) {
return segments.length === 0 && !segmentGroup.children[outlet];
}
expandSegmentAgainstRoute(ngModule, segmentGroup, routes, route, paths, outlet, allowRedirects) {
if (getOutlet(route) !== outlet) {
return noMatch(segmentGroup);
}
if (route.redirectTo === undefined) {
return this.matchSegmentAgainstRoute(ngModule, segmentGroup, route, paths);
}
if (allowRedirects && this.allowRedirects) {
return this.expandSegmentAgainstRouteUsingRedirect(ngModule, segmentGroup, routes, route, paths, outlet);
}
return noMatch(segmentGroup);
}
expandSegmentAgainstRouteUsingRedirect(ngModule, segmentGroup, routes, route, segments, outlet) {
if (route.path === '**') {
return this.expandWildCardWithParamsAgainstRouteUsingRedirect(ngModule, routes, route, outlet);
}
return this.expandRegularSegmentAgainstRouteUsingRedirect(ngModule, segmentGroup, routes, route, segments, outlet);
}
expandWildCardWithParamsAgainstRouteUsingRedirect(ngModule, routes, route, outlet) {
const newTree = this.applyRedirectCommands([], route.redirectTo, {});
if (route.redirectTo.startsWith('/')) {
return absoluteRedirect(newTree);
}
return this.lineralizeSegments(route, newTree).pipe(mergeMap((newSegments) => {
const group = new UrlSegmentGroup(newSegments, {});
return this.expandSegment(ngModule, group, routes, newSegments, outlet, false);
}));
}
expandRegularSegmentAgainstRouteUsingRedirect(ngModule, segmentGroup, routes, route, segments, outlet) {
const { matched, consumedSegments, lastChild, positionalParamSegments } = match(segmentGroup, route, segments);
if (!matched)
return noMatch(segmentGroup);
const newTree = this.applyRedirectCommands(consumedSegments, route.redirectTo, positionalParamSegments);
if (route.redirectTo.startsWith('/')) {
return absoluteRedirect(newTree);
}
return this.lineralizeSegments(route, newTree).pipe(mergeMap((newSegments) => {
return this.expandSegment(ngModule, segmentGroup, routes, newSegments.concat(segments.slice(lastChild)), outlet, false);
}));
}
matchSegmentAgainstRoute(ngModule, rawSegmentGroup, route, segments) {
if (route.path === '**') {
if (route.loadChildren) {
return this.configLoader.load(ngModule.injector, route)
.pipe(map((cfg) => {
route._loadedConfig = cfg;
return new UrlSegmentGroup(segments, {});
}));
}
return of(new UrlSegmentGroup(segments, {}));
}
const { matched, consumedSegments, lastChild } = match(rawSegmentGroup, route, segments);
if (!matched)
return noMatch(rawSegmentGroup);
const rawSlicedSegments = segments.slice(lastChild);
const childConfig$ = this.getChildConfig(ngModule, route, segments);
return childConfig$.pipe(mergeMap((routerConfig) => {
const childModule = routerConfig.module;
const childConfig = routerConfig.routes;
const { segmentGroup, slicedSegments } = split(rawSegmentGroup, consumedSegments, rawSlicedSegments, childConfig);
if (slicedSegments.length === 0 && segmentGroup.hasChildren()) {
const expanded$ = this.expandChildren(childModule, childConfig, segmentGroup);
return expanded$.pipe(map((children) => new UrlSegmentGroup(consumedSegments, children)));
}
if (childConfig.length === 0 && slicedSegments.length === 0) {
return of(new UrlSegmentGroup(consumedSegments, {}));
}
const expanded$ = this.expandSegment(childModule, segmentGroup, childConfig, slicedSegments, PRIMARY_OUTLET, true);
return expanded$.pipe(map((cs) => new UrlSegmentGroup(consumedSegments.concat(cs.segments), cs.children)));
}));
}
getChildConfig(ngModule, route, segments) {
if (route.children) {
// The children belong to the same module
return of(new LoadedRouterConfig(route.children, ngModule));
}
if (route.loadChildren) {
// lazy children belong to the loaded module
if (route._loadedConfig !== undefined) {
return of(route._loadedConfig);
}
return this.runCanLoadGuards(ngModule.injector, route, segments)
.pipe(mergeMap((shouldLoadResult) => {
if (shouldLoadResult) {
return this.configLoader.load(ngModule.injector, route)
.pipe(map((cfg) => {
route._loadedConfig = cfg;
return cfg;
}));
}
return canLoadFails(route);
}));
}
return of(new LoadedRouterConfig([], ngModule));
}
runCanLoadGuards(moduleInjector, route, segments) {
const canLoad = route.canLoad;
if (!canLoad || canLoad.length === 0)
return of(true);
const obs = from(canLoad).pipe(map((injectionToken) => {
const guard = moduleInjector.get(injectionToken);
let guardVal;
if (isCanLoad(guard)) {
guardVal = guard.canLoad(route, segments);
}
else if (isFunction(guard)) {
guardVal = guard(route, segments);
}
else {
throw new Error('Invalid CanLoad guard');
}
return wrapIntoObservable(guardVal);
}));
return obs.pipe(concatAll(), tap((result) => {
if (!isUrlTree(result))
return;
const error = navigationCancelingError(`Redirecting to "${this.urlSerializer.serialize(result)}"`);
error.url = result;
throw error;
}), every(result => result === true));
}
lineralizeSegments(route, urlTree) {
let res = [];
let c = urlTree.root;
while (true) {
res = res.concat(c.segments);
if (c.numberOfChildren === 0) {
return of(res);
}
if (c.numberOfChildren > 1 || !c.children[PRIMARY_OUTLET]) {
return namedOutletsRedirect(route.redirectTo);
}
c = c.children[PRIMARY_OUTLET];
}
}
applyRedirectCommands(segments, redirectTo, posParams) {
return this.applyRedirectCreatreUrlTree(redirectTo, this.urlSerializer.parse(redirectTo), segments, posParams);
}
applyRedirectCreatreUrlTree(redirectTo, urlTree, segments, posParams) {
const newRoot = this.createSegmentGroup(redirectTo, urlTree.root, segments, posParams);
return new UrlTree(newRoot, this.createQueryParams(urlTree.queryParams, this.urlTree.queryParams), urlTree.fragment);
}
createQueryParams(redirectToParams, actualParams) {
const res = {};
forEach(redirectToParams, (v, k) => {
const copySourceValue = typeof v === 'string' && v.startsWith(':');
if (copySourceValue) {
const sourceName = v.substring(1);
res[k] = actualParams[sourceName];
}
else {
res[k] = v;
}
});
return res;
}
createSegmentGroup(redirectTo, group, segments, posParams) {
const updatedSegments = this.createSegments(redirectTo, group.segments, segments, posParams);
let children = {};
forEach(group.children, (child, name) => {
children[name] = this.createSegmentGroup(redirectTo, child, segments, posParams);
});
return new UrlSegmentGroup(updatedSegments, children);
}
createSegments(redirectTo, redirectToSegments, actualSegments, posParams) {
return redirectToSegments.map(s => s.path.startsWith(':') ? this.findPosParam(redirectTo, s, posParams) :
this.findOrReturn(s, actualSegments));
}
findPosParam(redirectTo, redirectToUrlSegment, posParams) {
const pos = posParams[redirectToUrlSegment.path.substring(1)];
if (!pos)
throw new Error(`Cannot redirect to '${redirectTo}'. Cannot find '${redirectToUrlSegment.path}'.`);
return pos;
}
findOrReturn(redirectToUrlSegment, actualSegments) {
let idx = 0;
for (const s of actualSegments) {
if (s.path === redirectToUrlSegment.path) {
actualSegments.splice(idx);
return s;
}
idx++;
}
return redirectToUrlSegment;
}
}
function match(segmentGroup, route, segments) {
if (route.path === '') {
if ((route.pathMatch === 'full') && (segmentGroup.hasChildren() || segments.length > 0)) {
return { matched: false, consumedSegments: [], lastChild: 0, positionalParamSegments: {} };
}
return { matched: true, consumedSegments: [], lastChild: 0, positionalParamSegments: {} };
}
const matcher = route.matcher || defaultUrlMatcher;
const res = matcher(segments, segmentGroup, route);
if (!res) {
return {
matched: false,
consumedSegments: [],
lastChild: 0,
positionalParamSegments: {},
};
}
return {
matched: true,
consumedSegments: res.consumed,
lastChild: res.consumed.length,
positionalParamSegments: res.posParams,
};
}
function split(segmentGroup, consumedSegments, slicedSegments, config) {
if (slicedSegments.length > 0 &&
containsEmptyPathRedirectsWithNamedOutlets(segmentGroup, slicedSegments, config)) {
const s = new UrlSegmentGroup(consumedSegments, createChildrenForEmptySegments(config, new UrlSegmentGroup(slicedSegments, segmentGroup.children)));
return { segmentGroup: mergeTrivialChildren(s), slicedSegments: [] };
}
if (slicedSegments.length === 0 &&
containsEmptyPathRedirects(segmentGroup, slicedSegments, config)) {
const s = new UrlSegmentGroup(segmentGroup.segments, addEmptySegmentsToChildrenIfNeeded(segmentGroup, slicedSegments, config, segmentGroup.children));
return { segmentGroup: mergeTrivialChildren(s), slicedSegments };
}
return { segmentGroup, slicedSegments };
}
function mergeTrivialChildren(s) {
if (s.numberOfChildren === 1 && s.children[PRIMARY_OUTLET]) {
const c = s.children[PRIMARY_OUTLET];
return new UrlSegmentGroup(s.segments.concat(c.segments), c.children);
}
return s;
}
function addEmptySegmentsToChildrenIfNeeded(segmentGroup, slicedSegments, routes, children) {
const res = {};
for (const r of routes) {
if (isEmptyPathRedirect(segmentGroup, slicedSegments, r) && !children[getOutlet(r)]) {
res[getOutlet(r)] = new UrlSegmentGroup([], {});
}
}
return Object.assign(Object.assign({}, children), res);
}
function createChildrenForEmptySegments(routes, primarySegmentGroup) {
const res = {};
res[PRIMARY_OUTLET] = primarySegmentGroup;
for (const r of routes) {
if (r.path === '' && getOutlet(r) !== PRIMARY_OUTLET) {
res[getOutlet(r)] = new UrlSegmentGroup([], {});
}
}
return res;
}
function containsEmptyPathRedirectsWithNamedOutlets(segmentGroup, segments, routes) {
return routes.some(r => isEmptyPathRedirect(segmentGroup, segments, r) && getOutlet(r) !== PRIMARY_OUTLET);
}
function containsEmptyPathRedirects(segmentGroup, segments, routes) {
return routes.some(r => isEmptyPathRedirect(segmentGroup, segments, r));
}
function isEmptyPathRedirect(segmentGroup, segments, r) {
if ((segmentGroup.hasChildren() || segments.length > 0) && r.pathMatch === 'full') {
return false;
}
return r.path === '' && r.redirectTo !== undefined;
}
function getOutlet(route) {
return route.outlet || PRIMARY_OUTLET;
}
//# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector, NgModuleRef} from '@angular/core';\nimport {EmptyError, from, Observable, Observer, of} from 'rxjs';\nimport {catchError, concatAll, every, first, map, mergeMap, tap} from 'rxjs/operators';\n\nimport {LoadedRouterConfig, Route, Routes} from './config';\nimport {CanLoadFn} from './interfaces';\nimport {RouterConfigLoader} from './router_config_loader';\nimport {defaultUrlMatcher, navigationCancelingError, Params, PRIMARY_OUTLET} from './shared';\nimport {UrlSegment, UrlSegmentGroup, UrlSerializer, UrlTree} from './url_tree';\nimport {forEach, waitForMap, wrapIntoObservable} from './utils/collection';\nimport {isCanLoad, isFunction, isUrlTree} from './utils/type_guards';\n\nclass NoMatch {\n  public segmentGroup: UrlSegmentGroup|null;\n\n  constructor(segmentGroup?: UrlSegmentGroup) {\n    this.segmentGroup = segmentGroup || null;\n  }\n}\n\nclass AbsoluteRedirect {\n  constructor(public urlTree: UrlTree) {}\n}\n\nfunction noMatch(segmentGroup: UrlSegmentGroup): Observable<UrlSegmentGroup> {\n  return new Observable<UrlSegmentGroup>(\n      (obs: Observer<UrlSegmentGroup>) => obs.error(new NoMatch(segmentGroup)));\n}\n\nfunction absoluteRedirect(newTree: UrlTree): Observable<any> {\n  return new Observable<UrlSegmentGroup>(\n      (obs: Observer<UrlSegmentGroup>) => obs.error(new AbsoluteRedirect(newTree)));\n}\n\nfunction namedOutletsRedirect(redirectTo: string): Observable<any> {\n  return new Observable<UrlSegmentGroup>(\n      (obs: Observer<UrlSegmentGroup>) => obs.error(new Error(\n          `Only absolute redirects can have named outlets. redirectTo: '${redirectTo}'`)));\n}\n\nfunction canLoadFails(route: Route): Observable<LoadedRouterConfig> {\n  return new Observable<LoadedRouterConfig>(\n      (obs: Observer<LoadedRouterConfig>) => obs.error(\n          navigationCancelingError(`Cannot load children because the guard of the route \"path: '${\n              route.path}'\" returned false`)));\n}\n\n/**\n * Returns the `UrlTree` with the redirection applied.\n *\n * Lazy modules are loaded along the way.\n */\nexport function applyRedirects(\n    moduleInjector: Injector, configLoader: RouterConfigLoader, urlSerializer: UrlSerializer,\n    urlTree: UrlTree, config: Routes): Observable<UrlTree> {\n  return new ApplyRedirects(moduleInjector, configLoader, urlSerializer, urlTree, config).apply();\n}\n\nclass ApplyRedirects {\n  private allowRedirects: boolean = true;\n  private ngModule: NgModuleRef<any>;\n\n  constructor(\n      moduleInjector: Injector, private configLoader: RouterConfigLoader,\n      private urlSerializer: UrlSerializer, private urlTree: UrlTree, private config: Routes) {\n    this.ngModule = moduleInjector.get(NgModuleRef);\n  }\n\n  apply(): Observable<UrlTree> {\n    const expanded$ =\n        this.expandSegmentGroup(this.ngModule, this.config, this.urlTree.root, PRIMARY_OUTLET);\n    const urlTrees$ = expanded$.pipe(\n        map((rootSegmentGroup: UrlSegmentGroup) => this.createUrlTree(\n                rootSegmentGroup, this.urlTree.queryParams, this.urlTree.fragment!)));\n    return urlTrees$.pipe(catchError((e: any) => {\n      if (e instanceof AbsoluteRedirect) {\n        // after an absolute redirect we do not apply any more redirects!\n        this.allowRedirects = false;\n        // we need to run matching, so we can fetch all lazy-loaded modules\n        return this.match(e.urlTree);\n      }\n\n      if (e instanceof NoMatch) {\n        throw this.noMatchError(e);\n      }\n\n      throw e;\n    }));\n  }\n\n  private match(tree: UrlTree): Observable<UrlTree> {\n    const expanded$ =\n        this.expandSegmentGroup(this.ngModule, this.config, tree.root, PRIMARY_OUTLET);\n    const mapped$ = expanded$.pipe(\n        map((rootSegmentGroup: UrlSegmentGroup) =>\n                this.createUrlTree(rootSegmentGroup, tree.queryParams, tree.fragment!)));\n    return mapped$.pipe(catchError((e: any): Observable<UrlTree> => {\n      if (e instanceof NoMatch) {\n        throw this.noMatchError(e);\n      }\n\n      throw e;\n    }));\n  }\n\n  private noMatchError(e: NoMatch): any {\n    return new Error(`Cannot match any routes. URL Segment: '${e.segmentGroup}'`);\n  }\n\n  private createUrlTree(rootCandidate: UrlSegmentGroup, queryParams: Params, fragment: string):\n      UrlTree {\n    const root = rootCandidate.segments.length > 0 ?\n        new UrlSegmentGroup([], {[PRIMARY_OUTLET]: rootCandidate}) :\n        rootCandidate;\n    return new UrlTree(root, queryParams, fragment);\n  }\n\n  private expandSegmentGroup(\n      ngModule: NgModuleRef<any>, routes: Route[], segmentGroup: UrlSegmentGroup,\n      outlet: string): Observable<UrlSegmentGroup> {\n    if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {\n      return this.expandChildren(ngModule, routes, segmentGroup)\n          .pipe(map((children: any) => new UrlSegmentGroup([], children)));\n    }\n\n    return this.expandSegment(ngModule, segmentGroup, routes, segmentGroup.segments, outlet, true);\n  }\n\n  // Recursively expand segment groups for all the child outlets\n  private expandChildren(\n      ngModule: NgModuleRef<any>, routes: Route[],\n      segmentGroup: UrlSegmentGroup): Observable<{[name: string]: UrlSegmentGroup}> {\n    return waitForMap(\n        segmentGroup.children,\n        (childOutlet, child) => this.expandSegmentGroup(ngModule, routes, child, childOutlet));\n  }\n\n  private expandSegment(\n      ngModule: NgModuleRef<any>, segmentGroup: UrlSegmentGroup, routes: Route[],\n      segments: UrlSegment[], outlet: string,\n      allowRedirects: boolean): Observable<UrlSegmentGroup> {\n    return of(...routes).pipe(\n        map((r: any) => {\n          const expanded$ = this.expandSegmentAgainstRoute(\n              ngModule, segmentGroup, routes, r, segments, outlet, allowRedirects);\n          return expanded$.pipe(catchError((e: any) => {\n            if (e instanceof NoMatch) {\n              // TODO(i): this return type doesn't match the declared Observable<UrlSegmentGroup> -\n              // talk to Jason\n              return of(null) as any;\n            }\n            throw e;\n          }));\n        }),\n        concatAll(), first((s: any) => !!s), catchError((e: any, _: any) => {\n          if (e instanceof EmptyError || e.name === 'EmptyError') {\n            if (this.noLeftoversInUrl(segmentGroup, segments, outlet)) {\n              return of(new UrlSegmentGroup([], {}));\n            }\n            throw new NoMatch(segmentGroup);\n          }\n          throw e;\n        }));\n  }\n\n  private noLeftoversInUrl(segmentGroup: UrlSegmentGroup, segments: UrlSegment[], outlet: string):\n      boolean {\n    return segments.length === 0 && !segmentGroup.children[outlet];\n  }\n\n  private expandSegmentAgainstRoute(\n      ngModule: NgModuleRef<any>, segmentGroup: UrlSegmentGroup, routes: Route[], route: Route,\n      paths: UrlSegment[], outlet: string, allowRedirects: boolean): Observable<UrlSegmentGroup> {\n    if (getOutlet(route) !== outlet) {\n      return noMatch(segmentGroup);\n    }\n\n    if (route.redirectTo === undefined) {\n      return this.matchSegmentAgainstRoute(ngModule, segmentGroup, route, paths);\n    }\n\n    if (allowR