es6/operator/repeatWhen.js

import { Subject } from '../Subject';
import { tryCatch } from '../util/tryCatch';
import { errorObject } from '../util/errorObject';
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
/**
 * Returns an Observable that emits the same values as the source observable with the exception of a `complete`.
 * A `complete` will cause the emission of the Throwable that cause the complete to the Observable returned from
 * notificationHandler. If that Observable calls onComplete or `complete` then retry will call `complete` or `error`
 * on the child subscription. Otherwise, this Observable will resubscribe to the source observable, on a particular
 * Scheduler.
 *
 * <img src="./img/repeatWhen.png" width="100%">
 *
 * @param {notificationHandler} receives an Observable of notifications with which a user can `complete` or `error`,
 * aborting the retry.
 * @param {scheduler} the Scheduler on which to subscribe to the source Observable.
 * @return {Observable} the source Observable modified with retry logic.
 * @method repeatWhen
 * @owner Observable
 */
export function repeatWhen(notifier) {
    return this.lift(new RepeatWhenOperator(notifier, this));
}
var RepeatWhenOperator = (function () {
    function RepeatWhenOperator(notifier, source) {
        this.notifier = notifier;
        this.source = source;
    }
    RepeatWhenOperator.prototype.call = function (subscriber, source) {
        return source._subscribe(new RepeatWhenSubscriber(subscriber, this.notifier, this.source));
    };
    return RepeatWhenOperator;
}());
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
var RepeatWhenSubscriber = (function (_super) {
    __extends(RepeatWhenSubscriber, _super);
    function RepeatWhenSubscriber(destination, notifier, source) {
        _super.call(this, destination);
        this.notifier = notifier;
        this.source = source;
    }
    RepeatWhenSubscriber.prototype.complete = function () {
        if (!this.isStopped) {
            var notifications = this.notifications;
            var retries = this.retries;
            var retriesSubscription = this.retriesSubscription;
            if (!retries) {
                notifications = new Subject();
                retries = tryCatch(this.notifier)(notifications);
                if (retries === errorObject) {
                    return _super.prototype.complete.call(this);
                }
                retriesSubscription = subscribeToResult(this, retries);
            }
            else {
                this.notifications = null;
                this.retriesSubscription = null;
            }
            this.unsubscribe();
            this.closed = false;
            this.notifications = notifications;
            this.retries = retries;
            this.retriesSubscription = retriesSubscription;
            notifications.next();
        }
    };
    RepeatWhenSubscriber.prototype._unsubscribe = function () {
        var _a = this, notifications = _a.notifications, retriesSubscription = _a.retriesSubscription;
        if (notifications) {
            notifications.unsubscribe();
            this.notifications = null;
        }
        if (retriesSubscription) {
            retriesSubscription.unsubscribe();
            this.retriesSubscription = null;
        }
        this.retries = null;
    };
    RepeatWhenSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
        var _a = this, notifications = _a.notifications, retries = _a.retries, retriesSubscription = _a.retriesSubscription;
        this.notifications = null;
        this.retries = null;
        this.retriesSubscription = null;
        this.unsubscribe();
        this.isStopped = false;
        this.closed = false;
        this.notifications = notifications;
        this.retries = retries;
        this.retriesSubscription = retriesSubscription;
        this.source.subscribe(this);
    };
    return RepeatWhenSubscriber;
}(OuterSubscriber));
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