rxjs/_esm5/internal/observable/forkJoin.js

Reactive Extensions for modern JavaScript

/** PURE_IMPORTS_START tslib,_Observable,_util_isArray,_empty,_util_subscribeToResult,_OuterSubscriber,_operators_map PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { Observable } from '../Observable';
import { isArray } from '../util/isArray';
import { EMPTY } from './empty';
import { subscribeToResult } from '../util/subscribeToResult';
import { OuterSubscriber } from '../OuterSubscriber';
import { map } from '../operators/map';
export function forkJoin() {
    var sources = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        sources[_i] = arguments[_i];
    }
    var resultSelector;
    if (typeof sources[sources.length - 1] === 'function') {
        resultSelector = sources.pop();
    }
    if (sources.length === 1 && isArray(sources[0])) {
        sources = sources[0];
    }
    if (sources.length === 0) {
        return EMPTY;
    }
    if (resultSelector) {
        return forkJoin(sources).pipe(map(function (args) { return resultSelector.apply(void 0, args); }));
    }
    return new Observable(function (subscriber) {
        return new ForkJoinSubscriber(subscriber, sources);
    });
}
var ForkJoinSubscriber = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(ForkJoinSubscriber, _super);
    function ForkJoinSubscriber(destination, sources) {
        var _this = _super.call(this, destination) || this;
        _this.sources = sources;
        _this.completed = 0;
        _this.haveValues = 0;
        var len = sources.length;
        _this.values = new Array(len);
        for (var i = 0; i < len; i++) {
            var source = sources[i];
            var innerSubscription = subscribeToResult(_this, source, null, i);
            if (innerSubscription) {
                _this.add(innerSubscription);
            }
        }
        return _this;
    }
    ForkJoinSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
        this.values[outerIndex] = innerValue;
        if (!innerSub._hasValue) {
            innerSub._hasValue = true;
            this.haveValues++;
        }
    };
    ForkJoinSubscriber.prototype.notifyComplete = function (innerSub) {
        var _a = this, destination = _a.destination, haveValues = _a.haveValues, values = _a.values;
        var len = values.length;
        if (!innerSub._hasValue) {
            destination.complete();
            return;
        }
        this.completed++;
        if (this.completed !== len) {
            return;
        }
        if (haveValues === len) {
            destination.next(values);
        }
        destination.complete();
    };
    return ForkJoinSubscriber;
}(OuterSubscriber));
//# sourceMappingURL=forkJoin.js.map