@reactivex/ix-esnext-esm/asynciterable/operators/timeout.js

The Interactive Extensions for JavaScript

import { AsyncIterableX } from '../asynciterablex';
import { sleep } from '../_sleep';
export class TimeoutError extends Error {
    constructor() {
        super();
        Object.setPrototypeOf(this, TimeoutError.prototype);
        this.message = 'Timeout has occurred';
    }
}
const VALUE_TYPE = 'value';
const ERROR_TYPE = 'error';
export class TimeoutAsyncIterable extends AsyncIterableX {
    constructor(source, dueTime) {
        super();
        this._source = source;
        this._dueTime = dueTime;
    }
    async *[Symbol.asyncIterator]() {
        const it = this._source[Symbol.asyncIterator]();
        while (1) {
            const { type, value } = await Promise.race([
                it.next().then(val => {
                    return { type: VALUE_TYPE, val };
                }),
                sleep(this._dueTime).then(() => {
                    return { type: ERROR_TYPE };
                })
            ]);
            if (type === ERROR_TYPE) {
                throw new TimeoutError();
            }
            if (!value || value.done) {
                break;
            }
            yield value.value;
        }
    }
}
export function timeout(dueTime) {
    return function timeoutOperatorFunction(source) {
        return new TimeoutAsyncIterable(source, dueTime);
    };
}

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