@lotto24-angular/imports-orchestrator
Version:
Orchestrate dynamically imported components in Angular applications
34 lines • 6.81 kB
JavaScript
import { catchError, filter, from, map, of, race, take, timeout, TimeoutError, } from 'rxjs';
import { ChangeDetectorRef } from '@angular/core';
import { assertPromise, assertSignal } from '@lotto24-angular/util';
import { toObservable } from '@angular/core/rxjs-interop';
export function deferUntilComponentReady$(componentRef, item) {
const instance = componentRef.instance;
if (!assertImportedComponentReadyEmitter(instance)) {
return of(undefined);
}
item.logger.debug(`deferring until component w/ import=${item.identifier} emits ready`);
componentRef.injector.get(ChangeDetectorRef).markForCheck(); // ensure Lifecycle hooks are called
return race(resolveReady(instance), item.destroy$).pipe(timeout(item.timeout), catchError((err) => {
if (err instanceof TimeoutError) {
item.logger.warn(`deferred component w/ import=${item.identifier} timed out after ${item.timeout}ms`);
}
else {
item.logger.error(`deferred component w/ import=${item.identifier} errored: ${err}`);
}
return of(undefined);
}));
}
export function assertImportedComponentReadyEmitter(type) {
return type.importedComponentReady !== undefined;
}
function resolveReady(instance) {
const callback = instance.importedComponentReady.call(instance);
if (assertPromise(callback)) {
return from(callback);
}
return (assertSignal(callback)
? toObservable(callback)
: callback).pipe(filter((value) => value), map(() => undefined), take(1));
}
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xlKGNhbGxiYWNrIGFzIHVua25vd24gYXMgU2lnbmFsPGJvb2xlYW4+KVxuICAgICAgOiAoY2FsbGJhY2sgYXMgdW5rbm93biBhcyBPYnNlcnZhYmxlPGJvb2xlYW4+KVxuICApLnBpcGUoXG4gICAgZmlsdGVyKCh2YWx1ZSkgPT4gdmFsdWUpLFxuICAgIG1hcCgoKSA9PiB1bmRlZmluZWQpLFxuICAgIHRha2UoMSlcbiAgKTtcbn1cbiJdfQ==