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Angular - the routing library
/**
* @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.dev/license
*/
import { runInInjectionContext } from '@angular/core';
import { concat, defer, from, of, pipe, } from 'rxjs';
import { concatMap, first, map, mergeMap, tap } from 'rxjs/operators';
import { ActivationStart, ChildActivationStart } from '../events';
import { redirectingNavigationError } from '../navigation_canceling_error';
import { wrapIntoObservable } from '../utils/collection';
import { getClosestRouteInjector } from '../utils/config';
import { getCanActivateChild, getTokenOrFunctionIdentity, } from '../utils/preactivation';
import { isBoolean, isCanActivate, isCanActivateChild, isCanDeactivate, isCanLoad, isCanMatch, } from '../utils/type_guards';
import { prioritizedGuardValue } from './prioritized_guard_value';
export function checkGuards(injector, forwardEvent) {
return mergeMap((t) => {
const { targetSnapshot, currentSnapshot, guards: { canActivateChecks, canDeactivateChecks }, } = t;
if (canDeactivateChecks.length === 0 && canActivateChecks.length === 0) {
return of({ ...t, guardsResult: true });
}
return runCanDeactivateChecks(canDeactivateChecks, targetSnapshot, currentSnapshot, injector).pipe(mergeMap((canDeactivate) => {
return canDeactivate && isBoolean(canDeactivate)
? runCanActivateChecks(targetSnapshot, canActivateChecks, injector, forwardEvent)
: of(canDeactivate);
}), map((guardsResult) => ({ ...t, guardsResult })));
});
}
function runCanDeactivateChecks(checks, futureRSS, currRSS, injector) {
return from(checks).pipe(mergeMap((check) => runCanDeactivate(check.component, check.route, currRSS, futureRSS, injector)), first((result) => {
return result !== true;
}, true));
}
function runCanActivateChecks(futureSnapshot, checks, injector, forwardEvent) {
return from(checks).pipe(concatMap((check) => {
return concat(fireChildActivationStart(check.route.parent, forwardEvent), fireActivationStart(check.route, forwardEvent), runCanActivateChild(futureSnapshot, check.path, injector), runCanActivate(futureSnapshot, check.route, injector));
}), first((result) => {
return result !== true;
}, true));
}
/**
* This should fire off `ActivationStart` events for each route being activated at this
* level.
* In other words, if you're activating `a` and `b` below, `path` will contain the
* `ActivatedRouteSnapshot`s for both and we will fire `ActivationStart` for both. Always
* return
* `true` so checks continue to run.
*/
function fireActivationStart(snapshot, forwardEvent) {
if (snapshot !== null && forwardEvent) {
forwardEvent(new ActivationStart(snapshot));
}
return of(true);
}
/**
* This should fire off `ChildActivationStart` events for each route being activated at this
* level.
* In other words, if you're activating `a` and `b` below, `path` will contain the
* `ActivatedRouteSnapshot`s for both and we will fire `ChildActivationStart` for both. Always
* return
* `true` so checks continue to run.
*/
function fireChildActivationStart(snapshot, forwardEvent) {
if (snapshot !== null && forwardEvent) {
forwardEvent(new ChildActivationStart(snapshot));
}
return of(true);
}
function runCanActivate(futureRSS, futureARS, injector) {
const canActivate = futureARS.routeConfig ? futureARS.routeConfig.canActivate : null;
if (!canActivate || canActivate.length === 0)
return of(true);
const canActivateObservables = canActivate.map((canActivate) => {
return defer(() => {
const closestInjector = getClosestRouteInjector(futureARS) ?? injector;
const guard = getTokenOrFunctionIdentity(canActivate, closestInjector);
const guardVal = isCanActivate(guard)
? guard.canActivate(futureARS, futureRSS)
: runInInjectionContext(closestInjector, () => guard(futureARS, futureRSS));
return wrapIntoObservable(guardVal).pipe(first());
});
});
return of(canActivateObservables).pipe(prioritizedGuardValue());
}
function runCanActivateChild(futureRSS, path, injector) {
const futureARS = path[path.length - 1];
const canActivateChildGuards = path
.slice(0, path.length - 1)
.reverse()
.map((p) => getCanActivateChild(p))
.filter((_) => _ !== null);
const canActivateChildGuardsMapped = canActivateChildGuards.map((d) => {
return defer(() => {
const guardsMapped = d.guards.map((canActivateChild) => {
const closestInjector = getClosestRouteInjector(d.node) ?? injector;
const guard = getTokenOrFunctionIdentity(canActivateChild, closestInjector);
const guardVal = isCanActivateChild(guard)
? guard.canActivateChild(futureARS, futureRSS)
: runInInjectionContext(closestInjector, () => guard(futureARS, futureRSS));
return wrapIntoObservable(guardVal).pipe(first());
});
return of(guardsMapped).pipe(prioritizedGuardValue());
});
});
return of(canActivateChildGuardsMapped).pipe(prioritizedGuardValue());
}
function runCanDeactivate(component, currARS, currRSS, futureRSS, injector) {
const canDeactivate = currARS && currARS.routeConfig ? currARS.routeConfig.canDeactivate : null;
if (!canDeactivate || canDeactivate.length === 0)
return of(true);
const canDeactivateObservables = canDeactivate.map((c) => {
const closestInjector = getClosestRouteInjector(currARS) ?? injector;
const guard = getTokenOrFunctionIdentity(c, closestInjector);
const guardVal = isCanDeactivate(guard)
? guard.canDeactivate(component, currARS, currRSS, futureRSS)
: runInInjectionContext(closestInjector, () => guard(component, currARS, currRSS, futureRSS));
return wrapIntoObservable(guardVal).pipe(first());
});
return of(canDeactivateObservables).pipe(prioritizedGuardValue());
}
export function runCanLoadGuards(injector, route, segments, urlSerializer) {
const canLoad = route.canLoad;
if (canLoad === undefined || canLoad.length === 0) {
return of(true);
}
const canLoadObservables = canLoad.map((injectionToken) => {
const guard = getTokenOrFunctionIdentity(injectionToken, injector);
const guardVal = isCanLoad(guard)
? guard.canLoad(route, segments)
: runInInjectionContext(injector, () => guard(route, segments));
return wrapIntoObservable(guardVal);
});
return of(canLoadObservables).pipe(prioritizedGuardValue(), redirectIfUrlTree(urlSerializer));
}
function redirectIfUrlTree(urlSerializer) {
return pipe(tap((result) => {
if (typeof result === 'boolean')
return;
throw redirectingNavigationError(urlSerializer, result);
}), map((result) => result === true));
}
export function runCanMatchGuards(injector, route, segments, urlSerializer) {
const canMatch = route.canMatch;
if (!canMatch || canMatch.length === 0)
return of(true);
const canMatchObservables = canMatch.map((injectionToken) => {
const guard = getTokenOrFunctionIdentity(injectionToken, injector);
const guardVal = isCanMatch(guard)
? guard.canMatch(route, segments)
: runInInjectionContext(injector, () => guard(route, segments));
return wrapIntoObservable(guardVal);
});
return of(canMatchObservables).pipe(prioritizedGuardValue(), redirectIfUrlTree(urlSerializer));
}
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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.dev/license\n */\n\nimport {EnvironmentInjector, ProviderToken, runInInjectionContext} from '@angular/core';\nimport {\n  concat,\n  defer,\n  from,\n  MonoTypeOperatorFunction,\n  Observable,\n  of,\n  OperatorFunction,\n  pipe,\n} from 'rxjs';\nimport {concatMap, first, map, mergeMap, tap} from 'rxjs/operators';\n\nimport {ActivationStart, ChildActivationStart, Event} from '../events';\nimport {\n  CanActivateChildFn,\n  CanActivateFn,\n  CanDeactivateFn,\n  GuardResult,\n  CanLoadFn,\n  CanMatchFn,\n  Route,\n} from '../models';\nimport {navigationCancelingError, redirectingNavigationError} from '../navigation_canceling_error';\nimport {NavigationTransition} from '../navigation_transition';\nimport {ActivatedRouteSnapshot, RouterStateSnapshot} from '../router_state';\nimport {isUrlTree, UrlSegment, UrlSerializer, UrlTree} from '../url_tree';\nimport {wrapIntoObservable} from '../utils/collection';\nimport {getClosestRouteInjector} from '../utils/config';\nimport {\n  CanActivate,\n  CanDeactivate,\n  getCanActivateChild,\n  getTokenOrFunctionIdentity,\n} from '../utils/preactivation';\nimport {\n  isBoolean,\n  isCanActivate,\n  isCanActivateChild,\n  isCanDeactivate,\n  isCanLoad,\n  isCanMatch,\n} from '../utils/type_guards';\n\nimport {prioritizedGuardValue} from './prioritized_guard_value';\n\nexport function checkGuards(\n  injector: EnvironmentInjector,\n  forwardEvent?: (evt: Event) => void,\n): MonoTypeOperatorFunction<NavigationTransition> {\n  return mergeMap((t) => {\n    const {\n      targetSnapshot,\n      currentSnapshot,\n      guards: {canActivateChecks, canDeactivateChecks},\n    } = t;\n    if (canDeactivateChecks.length === 0 && canActivateChecks.length === 0) {\n      return of({...t, guardsResult: true});\n    }\n\n    return runCanDeactivateChecks(\n      canDeactivateChecks,\n      targetSnapshot!,\n      currentSnapshot,\n      injector,\n    ).pipe(\n      mergeMap((canDeactivate) => {\n        return canDeactivate && isBoolean(canDeactivate)\n          ? runCanActivateChecks(targetSnapshot!, canActivateChecks, injector, forwardEvent)\n          : of(canDeactivate);\n      }),\n      map((guardsResult) => ({...t, guardsResult})),\n    );\n  });\n}\n\nfunction runCanDeactivateChecks(\n  checks: CanDeactivate[],\n  futureRSS: RouterStateSnapshot,\n  currRSS: RouterStateSnapshot,\n  injector: EnvironmentInjector,\n) {\n  return from(checks).pipe(\n    mergeMap((check) =>\n      runCanDeactivate(check.component, check.route, currRSS, futureRSS, injector),\n    ),\n    first((result) => {\n      return result !== true;\n    }, true),\n  );\n}\n\nfunction runCanActivateChecks(\n  futureSnapshot: RouterStateSnapshot,\n  checks: CanActivate[],\n  injector: EnvironmentInjector,\n  forwardEvent?: (evt: Event) => void,\n) {\n  return from(checks).pipe(\n    concatMap((check: CanActivate) => {\n      return concat(\n        fireChildActivationStart(check.route.parent, forwardEvent),\n        fireActivationStart(check.route, forwardEvent),\n        runCanActivateChild(futureSnapshot, check.path, injector),\n        runCanActivate(futureSnapshot, check.route, injector),\n      );\n    }),\n    first((result) => {\n      return result !== true;\n    }, true),\n  );\n}\n\n/**\n * This should fire off `ActivationStart` events for each route being activated at this\n * level.\n * In other words, if you're activating `a` and `b` below, `path` will contain the\n * `ActivatedRouteSnapshot`s for both and we will fire `ActivationStart` for both. Always\n * return\n * `true` so checks continue to run.\n */\nfunction fireActivationStart(\n  snapshot: ActivatedRouteSnapshot | null,\n  forwardEvent?: (evt: Event) => void,\n): Observable<boolean> {\n  if (snapshot !== null && forwardEvent) {\n    forwardEvent(new ActivationStart(snapshot));\n  }\n  return of(true);\n}\n\n/**\n * This should fire off `ChildActivationStart` events for each route being activated at this\n * level.\n * In other words, if you're activating `a` and `b` below, `path` will contain the\n * `ActivatedRouteSnapshot`s for both and we will fire `ChildActivationStart` for both. Always\n * return\n * `true` so checks continue to run.\n */\nfunction fireChildActivationStart(\n  snapshot: ActivatedRouteSnapshot | null,\n  forwardEvent?: (evt: Event) => void,\n): Observable<boolean> {\n  if (snapshot !== null && forwardEvent) {\n    forwardEvent(new ChildActivationStart(snapshot));\n  }\n  return of(true);\n}\n\nfunction runCanActivate(\n  futureRSS: RouterStateSnapshot,\n  futureARS: ActivatedRouteSnapshot,\n  injector: EnvironmentInjector,\n): Observable<GuardResult> {\n  const canActivate = futureARS.routeConfig ? futureARS.routeConfig.canActivate : null;\n  if (!canActivate || canActivate.length === 0) return of(true);\n\n  const canActivateObservables = canActivate.map(\n    (canActivate: CanActivateFn | ProviderToken<unknown>) => {\n      return defer(() => {\n        const closestInjector = getClosestRouteInjector(futureARS) ?? injector;\n        const guard = getTokenOrFunctionIdentity<CanActivate>(canActivate, closestInjector);\n        const guardVal = isCanActivate(guard)\n          ? guard.canActivate(futureARS, futureRSS)\n          : runInInjectionContext(closestInjector, () =>\n              (guard as CanActivateFn)(futureARS, futureRSS),\n            );\n        return wrapIntoObservable(guardVal).pipe(first());\n      });\n    },\n  );\n  return of(canActivateObservables).pipe(prioritizedGuardValue());\n}\n\nfunction runCanActivateChild(\n  futureRSS: RouterStateSnapshot,\n  path: ActivatedRouteSnapshot[],\n  injector: EnvironmentInjector,\n): Observable<GuardResult> {\n  const futureARS = path[path.length - 1];\n\n  const canActivateChildGuards = path\n    .slice(0, path.length - 1)\n    .reverse()\n    .map((p) => getCanActivateChild(p))\n    .filter((_) => _ !== null);\n\n  const canActivateChildGuardsMapped = canActivateChildGuards.map((d: any) => {\n    return defer(() => {\n      const guardsMapped = d.guards.map(\n        (canActivateChild: CanActivateChildFn | ProviderToken<unknown>) => {\n          const closestInjector = getClosestRouteInjector(d.node) ?? injector;\n          const guard = getTokenOrFunctionIdentity<{canActivateChild: CanActivateChildFn}>(\n            canActivateChild,\n            closestInjector,\n          );\n          const guardVal = isCanActivateChild(guard)\n            ? guard.canActivateChild(futureARS, futureRSS)\n            : runInInjectionContext(closestInjector, () =>\n                (guard as CanActivateChildFn)(futureARS, futureRSS),\n              );\n          return wrapIntoObservable(guardVal).pipe(first());\n        },\n      );\n      return of(guardsMapped).pipe(prioritizedGuardValue());\n    });\n  });\n  return of(canActivateChildGuardsMapped).pipe(prioritizedGuardValue());\n}\n\nfunction runCanDeactivate(\n  component: Object | null,\n  currARS: ActivatedRouteSnapshot,\n  currRSS: RouterStateSnapshot,\n  futureRSS: RouterStateSnapshot,\n  injector: EnvironmentInjector,\n): Observable<GuardResult> {\n  const canDeactivate = currARS && currARS.routeConfig ? currARS.routeConfig.canDeactivate : null;\n  if (!canDeactivate || canDeactivate.length === 0) return of(true);\n  const canDeactivateObservables = canDeactivate.map((c: any) => {\n    const closestInjector = getClosestRouteInjector(currARS) ?? injector;\n    const guard = getTokenOrFunctionIdentity<any>(c, closestInjector);\n    const guardVal = isCanDeactivate(guard)\n      ? guard.canDeactivate(component, currARS, currRSS, futureRSS)\n      : runInInjectionContext(closestInjector, () =>\n          (guard as CanDeactivateFn<any>)(component, currARS, currRSS, futureRSS),\n        );\n    return wrapIntoObservable(guardVal).pipe(first());\n  });\n  return of(canDeactivateObservables).pipe(prioritizedGuardValue());\n}\n\nexport function runCanLoadGuards(\n  injector: EnvironmentInjector,\n  route: Route,\n  segments: UrlSegment[],\n  urlSerializer: UrlSerializer,\n): Observable<boolean> {\n  const canLoad = route.canLoad;\n  if (canLoad === undefined || canLoad.length === 0) {\n    return of(true);\n  }\n\n  const canLoadObservables = canLoad.map((injectionToken: any) => {\n    const guard = getTokenOrFunctionIdentity<any>(injectionToken, injector);\n    const guardVal = isCanLoad(guard)\n      ? guard.canLoad(route, segments)\n      : runInInjectionContext(injector, () => (guard as CanLoadFn)(route, segments));\n    return wrapIntoObservable(guardVal);\n  });\n\n  return of(canLoadObservables).pipe(prioritizedGuardValue(), redirectIfUrlTree(urlSerializer));\n}\n\nfunction redirectIfUrlTree(urlSerializer: UrlSerializer): OperatorFunction<GuardResult, boolean> {\n  return pipe(\n    tap((result: GuardResult) => {\n      if (typeof result === 'boolean') return;\n\n      throw redirectingNavigationError(urlSerializer, result);\n    }),\n    map((result) => result === true),\n  );\n}\n\nexport function runCanMatchGuards(\n  injector: EnvironmentInjector,\n  route: Route,\n  segments: UrlSegment[],\n  urlSerializer: UrlSerializer,\n): Observable<GuardResult> {\n  const canMatch = route.canMatch;\n  if (!canMatch || canMatch.length === 0) return of(true);\n\n  const canMatchObservables = canMatch.map((injectionToken) => {\n    const guard = getTokenOrFunctionIdentity(injectionToken, injector);\n    const guardVal = isCanMatch(guard)\n      ? guard.canMatch(route, segments)\n      : runInInjectionContext(injector, () => (guard as CanMatchFn)(route, segments));\n    return wrapIntoObservable(guardVal);\n  });\n\n  return of(canMatchObservables).pipe(prioritizedGuardValue(), redirectIfUrlTree(urlSerializer));\n}\n"]}