@angular/router
Version:
Angular - the routing library
58 lines • 10.9 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 { EMPTY, from, of } from 'rxjs';
import { concatMap, map, mergeMap, takeLast, tap } from 'rxjs/operators';
import { inheritedParamsDataResolve } from '../router_state';
import { wrapIntoObservable } from '../utils/collection';
import { getToken } from '../utils/preactivation';
export function resolveData(paramsInheritanceStrategy, moduleInjector) {
return function (source) {
return source.pipe(mergeMap(t => {
const { targetSnapshot, guards: { canActivateChecks } } = t;
if (!canActivateChecks.length) {
return of(t);
}
let canActivateChecksResolved = 0;
return from(canActivateChecks)
.pipe(concatMap(check => runResolve(check.route, targetSnapshot, paramsInheritanceStrategy, moduleInjector)), tap(() => canActivateChecksResolved++), takeLast(1), mergeMap(_ => canActivateChecksResolved === canActivateChecks.length ? of(t) : EMPTY));
}));
};
}
function runResolve(futureARS, futureRSS, paramsInheritanceStrategy, moduleInjector) {
const resolve = futureARS._resolve;
return resolveNode(resolve, futureARS, futureRSS, moduleInjector)
.pipe(map((resolvedData) => {
futureARS._resolvedData = resolvedData;
futureARS.data = Object.assign(Object.assign({}, futureARS.data), inheritedParamsDataResolve(futureARS, paramsInheritanceStrategy).resolve);
return null;
}));
}
function resolveNode(resolve, futureARS, futureRSS, moduleInjector) {
const keys = Object.keys(resolve);
if (keys.length === 0) {
return of({});
}
const data = {};
return from(keys).pipe(mergeMap((key) => getResolver(resolve[key], futureARS, futureRSS, moduleInjector)
.pipe(tap((value) => {
data[key] = value;
}))), takeLast(1), mergeMap(() => {
// Ensure all resolvers returned values, otherwise don't emit any "next" and just complete
// the chain which will cancel navigation
if (Object.keys(data).length === keys.length) {
return of(data);
}
return EMPTY;
}));
}
function getResolver(injectionToken, futureARS, futureRSS, moduleInjector) {
const resolver = getToken(injectionToken, futureARS, moduleInjector);
return resolver.resolve ? wrapIntoObservable(resolver.resolve(futureARS, futureRSS)) :
wrapIntoObservable(resolver(futureARS, futureRSS));
}
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of(t) : EMPTY),\n          );\n    }));\n  };\n}\n\nfunction runResolve(\n    futureARS: ActivatedRouteSnapshot, futureRSS: RouterStateSnapshot,\n    paramsInheritanceStrategy: 'emptyOnly'|'always', moduleInjector: Injector) {\n  const resolve = futureARS._resolve;\n  return resolveNode(resolve, futureARS, futureRSS, moduleInjector)\n      .pipe(map((resolvedData: any) => {\n        futureARS._resolvedData = resolvedData;\n        futureARS.data = {\n          ...futureARS.data,\n          ...inheritedParamsDataResolve(futureARS, paramsInheritanceStrategy).resolve\n        };\n        return null;\n      }));\n}\n\nfunction resolveNode(\n    resolve: ResolveData, futureARS: ActivatedRouteSnapshot, futureRSS: RouterStateSnapshot,\n    moduleInjector: Injector): Observable<any> {\n  const keys = Object.keys(resolve);\n  if (keys.length === 0) {\n    return of({});\n  }\n  const data: {[k: string]: any} = {};\n  return from(keys).pipe(\n      mergeMap(\n          (key: string) => getResolver(resolve[key], futureARS, futureRSS, moduleInjector)\n                               .pipe(tap((value: any) => {\n                                 data[key] = value;\n                               }))),\n      takeLast(1),\n      mergeMap(() => {\n        // Ensure all resolvers returned values, otherwise don't emit any \"next\" and just complete\n        // the chain which will cancel navigation\n        if (Object.keys(data).length === keys.length) {\n          return of(data);\n        }\n        return EMPTY;\n      }),\n  );\n}\n\nfunction getResolver(\n    injectionToken: any, futureARS: ActivatedRouteSnapshot, futureRSS: RouterStateSnapshot,\n    moduleInjector: Injector): Observable<any> {\n  const resolver = getToken(injectionToken, futureARS, moduleInjector);\n  return resolver.resolve ? wrapIntoObservable(resolver.resolve(futureARS, futureRSS)) :\n                            wrapIntoObservable(resolver(futureARS, futureRSS));\n}\n"]}