rxjs/dist/esm/internal/operators/retry.js

Reactive Extensions for modern JavaScript

import { operate } from '../util/lift';
import { EMPTY } from '../observable/empty';
import { OperatorSubscriber } from './OperatorSubscriber';
export function retry(configOrCount = Infinity) {
    let config;
    if (configOrCount && typeof configOrCount === 'object') {
        config = configOrCount;
    }
    else {
        config = {
            count: configOrCount,
        };
    }
    const { count, resetOnSuccess = false } = config;
    return count <= 0
        ? () => EMPTY
        : operate((source, subscriber) => {
            let soFar = 0;
            let innerSub;
            const subscribeForRetry = () => {
                let syncUnsub = false;
                innerSub = source.subscribe(new OperatorSubscriber(subscriber, (value) => {
                    if (resetOnSuccess) {
                        soFar = 0;
                    }
                    subscriber.next(value);
                }, (err) => {
                    if (soFar++ < count) {
                        if (innerSub) {
                            innerSub.unsubscribe();
                            innerSub = null;
                            subscribeForRetry();
                        }
                        else {
                            syncUnsub = true;
                        }
                    }
                    else {
                        subscriber.error(err);
                    }
                }));
                if (syncUnsub) {
                    innerSub.unsubscribe();
                    innerSub = null;
                    subscribeForRetry();
                }
            };
            subscribeForRetry();
        });
}
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