@lifaon/rx-js-light/src/observable/built-in/to/without-notifications/promise/to-promise.mjs

Blazing fast Observables

import {isAbortSignal} from "../../../../../misc/abortable/is/is-abort-signal.mjs";
import {createAbortError} from "../../../../../misc/errors/abort-error/create-abort-error.mjs";
import {createEventListener} from "../../../../../misc/event-listener/functions/create-event-listener.mjs";
import {toTypedEventTarget} from "../../../../../misc/event-listener/functions/to-typed-event-target.mjs";
import {asyncUnsubscribe} from "../../../../../misc/helpers/async-unsubscribe.mjs";
export function toPromise(subscribe, options) {
  return new Promise((resolve, reject) => {
    let removeAbortEventListener;
    if (options !== void 0 && isAbortSignal(options.signal)) {
      const signal = options.signal;
      if (signal.aborted) {
        return reject(createAbortError({
          signal
        }));
      } else {
        removeAbortEventListener = createEventListener(toTypedEventTarget(signal), 'abort', () => {
          _reject(createAbortError({
            signal
          }));
        });
      }
    }
    const end = () => {
      if (removeAbortEventListener !== void 0) {
        removeAbortEventListener();
      }
      asyncUnsubscribe(() => unsubscribe);
    };
    const _resolve = value => {
      end();
      resolve(value);
    };
    const _reject = error => {
      end();
      reject(error);
    };
    const unsubscribe = subscribe(_resolve);
  });
}