@acutmore/rxjs/dist/package/_esm5/internal/observable/race.js

Reactive Extensions for modern JavaScript

var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
import { isArray } from '..//util/isArray';
import { ArrayObservable } from '../../internal/observable/ArrayObservable';
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '..//util/subscribeToResult';
export function race() {
    var observables = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        observables[_i] = arguments[_i];
    }
    // if the only argument is an array, it was most likely called with
    // `race([obs1, obs2, ...])`
    if (observables.length === 1) {
        if (isArray(observables[0])) {
            observables = observables[0];
        }
        else {
            return observables[0];
        }
    }
    return new ArrayObservable(observables).lift(new RaceOperator());
}
var RaceOperator = /** @class */ (function () {
    function RaceOperator() {
    }
    RaceOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new RaceSubscriber(subscriber));
    };
    return RaceOperator;
}());
export { RaceOperator };
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
var RaceSubscriber = /** @class */ (function (_super) {
    __extends(RaceSubscriber, _super);
    function RaceSubscriber(destination) {
        var _this = _super.call(this, destination) || this;
        _this.hasFirst = false;
        _this.observables = [];
        _this.subscriptions = [];
        return _this;
    }
    RaceSubscriber.prototype._next = function (observable) {
        this.observables.push(observable);
    };
    RaceSubscriber.prototype._complete = function () {
        var observables = this.observables;
        var len = observables.length;
        if (len === 0) {
            this.destination.complete();
        }
        else {
            for (var i = 0; i < len && !this.hasFirst; i++) {
                var observable = observables[i];
                var subscription = subscribeToResult(this, observable, observable, i);
                if (this.subscriptions) {
                    this.subscriptions.push(subscription);
                }
                this.add(subscription);
            }
            this.observables = null;
        }
    };
    RaceSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
        if (!this.hasFirst) {
            this.hasFirst = true;
            for (var i = 0; i < this.subscriptions.length; i++) {
                if (i !== outerIndex) {
                    var subscription = this.subscriptions[i];
                    subscription.unsubscribe();
                    this.remove(subscription);
                }
            }
            this.subscriptions = null;
        }
        this.destination.next(innerValue);
    };
    return RaceSubscriber;
}(OuterSubscriber));
export { RaceSubscriber };
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