es6/operator/mergeMapTo.js

import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
/* tslint:disable:max-line-length */
export function mergeMapTo(innerObservable, resultSelector, concurrent) {
    if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
    if (typeof resultSelector === 'number') {
        concurrent = resultSelector;
        resultSelector = null;
    }
    return this.lift(new MergeMapToOperator(innerObservable, resultSelector, concurrent));
}
// TODO: Figure out correct signature here: an Operator<Observable<T>, R>
//       needs to implement call(observer: Subscriber<R>): Subscriber<Observable<T>>
export var MergeMapToOperator = (function () {
    function MergeMapToOperator(ish, resultSelector, concurrent) {
        if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
        this.ish = ish;
        this.resultSelector = resultSelector;
        this.concurrent = concurrent;
    }
    MergeMapToOperator.prototype.call = function (observer, source) {
        return source._subscribe(new MergeMapToSubscriber(observer, this.ish, this.resultSelector, this.concurrent));
    };
    return MergeMapToOperator;
}());
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
export var MergeMapToSubscriber = (function (_super) {
    __extends(MergeMapToSubscriber, _super);
    function MergeMapToSubscriber(destination, ish, resultSelector, concurrent) {
        if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; }
        _super.call(this, destination);
        this.ish = ish;
        this.resultSelector = resultSelector;
        this.concurrent = concurrent;
        this.hasCompleted = false;
        this.buffer = [];
        this.active = 0;
        this.index = 0;
    }
    MergeMapToSubscriber.prototype._next = function (value) {
        if (this.active < this.concurrent) {
            var resultSelector = this.resultSelector;
            var index = this.index++;
            var ish = this.ish;
            var destination = this.destination;
            this.active++;
            this._innerSub(ish, destination, resultSelector, value, index);
        }
        else {
            this.buffer.push(value);
        }
    };
    MergeMapToSubscriber.prototype._innerSub = function (ish, destination, resultSelector, value, index) {
        this.add(subscribeToResult(this, ish, value, index));
    };
    MergeMapToSubscriber.prototype._complete = function () {
        this.hasCompleted = true;
        if (this.active === 0 && this.buffer.length === 0) {
            this.destination.complete();
        }
    };
    MergeMapToSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
        var _a = this, resultSelector = _a.resultSelector, destination = _a.destination;
        if (resultSelector) {
            this.trySelectResult(outerValue, innerValue, outerIndex, innerIndex);
        }
        else {
            destination.next(innerValue);
        }
    };
    MergeMapToSubscriber.prototype.trySelectResult = function (outerValue, innerValue, outerIndex, innerIndex) {
        var _a = this, resultSelector = _a.resultSelector, destination = _a.destination;
        var result;
        try {
            result = resultSelector(outerValue, innerValue, outerIndex, innerIndex);
        }
        catch (err) {
            destination.error(err);
            return;
        }
        destination.next(result);
    };
    MergeMapToSubscriber.prototype.notifyError = function (err) {
        this.destination.error(err);
    };
    MergeMapToSubscriber.prototype.notifyComplete = function (innerSub) {
        var buffer = this.buffer;
        this.remove(innerSub);
        this.active--;
        if (buffer.length > 0) {
            this._next(buffer.shift());
        }
        else if (this.active === 0 && this.hasCompleted) {
            this.destination.complete();
        }
    };
    return MergeMapToSubscriber;
}(OuterSubscriber));
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