Function runCanActivateChild

packages/router/src/operators/check_guards.ts:174–207

(
  futureRSS: RouterStateSnapshot,
  path: ActivatedRouteSnapshot[],
)

}

function runCanActivateChild(
  futureRSS: RouterStateSnapshot,
  path: ActivatedRouteSnapshot[],
): Observable<GuardResult> {
  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: any) => {
    return defer(() => {
      const guardsMapped = d.guards.map(
        (canActivateChild: CanActivateChildFn | ProviderToken<unknown>) => {
          const closestInjector = d.node._environmentInjector;
          const guard = getTokenOrFunctionIdentity<{canActivateChild: CanActivateChildFn}>(
            canActivateChild,
            closestInjector,
          );
          const guardVal = isCanActivateChild(guard)
            ? guard.canActivateChild(futureARS, futureRSS)
            : runInInjectionContext(closestInjector, () =>
                (guard as CanActivateChildFn)(futureARS, futureRSS),
              );
          return wrapIntoObservable(guardVal).pipe(first());
        },
      );
      return of(guardsMapped).pipe(prioritizedGuardValue());
    });
  });
  return of(canActivateChildGuardsMapped).pipe(prioritizedGuardValue());
}

function runCanDeactivate(
  component: Object | null,