@angular/router
Version:
Angular - the routing library
42 lines • 7.29 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 { combineLatest } from 'rxjs';
import { filter, map, scan, startWith, switchMap, take } from 'rxjs/operators';
import { isUrlTree } from '../utils/type_guards';
const INITIAL_VALUE = Symbol('INITIAL_VALUE');
export function prioritizedGuardValue() {
return switchMap(obs => {
return combineLatest(...obs.map(o => o.pipe(take(1), startWith(INITIAL_VALUE))))
.pipe(scan((acc, list) => {
let isPending = false;
return list.reduce((innerAcc, val, i) => {
if (innerAcc !== INITIAL_VALUE)
return innerAcc;
// Toggle pending flag if any values haven't been set yet
if (val === INITIAL_VALUE)
isPending = true;
// Any other return values are only valid if we haven't yet hit a pending
// call. This guarantees that in the case of a guard at the bottom of the
// tree that returns a redirect, we will wait for the higher priority
// guard at the top to finish before performing the redirect.
if (!isPending) {
// Early return when we hit a `false` value as that should always
// cancel navigation
if (val === false)
return val;
if (i === list.length - 1 || isUrlTree(val)) {
return val;
}
}
return innerAcc;
}, acc);
}, INITIAL_VALUE), filter(item => item !== INITIAL_VALUE), map(item => isUrlTree(item) ? item : item === true), //
take(1));
});
}
//# sourceMappingURL=data:application/json;base64,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