93 lines
3.8 KiB
JavaScript
93 lines
3.8 KiB
JavaScript
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"use strict";
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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var OuterSubscriber_1 = require('../OuterSubscriber');
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var subscribeToResult_1 = require('../util/subscribeToResult');
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/**
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* Returns an Observable that applies the given function to each item of the source Observable
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* to create a new Observable, which are then concatenated together to produce a new Observable.
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* @param {function} project function called for each item of the source to produce a new Observable.
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* @param {function} [resultSelector] optional function for then selecting on each inner Observable.
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* @returns {Observable} an Observable containing all the projected Observables of each item of the source concatenated together.
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*/
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function exhaustMap(project, resultSelector) {
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return this.lift(new SwitchFirstMapOperator(project, resultSelector));
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}
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exports.exhaustMap = exhaustMap;
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var SwitchFirstMapOperator = (function () {
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function SwitchFirstMapOperator(project, resultSelector) {
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this.project = project;
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this.resultSelector = resultSelector;
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}
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SwitchFirstMapOperator.prototype.call = function (subscriber) {
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return new SwitchFirstMapSubscriber(subscriber, this.project, this.resultSelector);
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};
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return SwitchFirstMapOperator;
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}());
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var SwitchFirstMapSubscriber = (function (_super) {
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__extends(SwitchFirstMapSubscriber, _super);
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function SwitchFirstMapSubscriber(destination, project, resultSelector) {
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_super.call(this, destination);
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this.project = project;
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this.resultSelector = resultSelector;
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this.hasSubscription = false;
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this.hasCompleted = false;
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this.index = 0;
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}
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SwitchFirstMapSubscriber.prototype._next = function (value) {
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if (!this.hasSubscription) {
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this.tryNext(value);
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}
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};
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SwitchFirstMapSubscriber.prototype.tryNext = function (value) {
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var index = this.index++;
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var destination = this.destination;
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try {
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var result = this.project(value, index);
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this.hasSubscription = true;
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this.add(subscribeToResult_1.subscribeToResult(this, result, value, index));
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}
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catch (err) {
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destination.error(err);
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}
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};
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SwitchFirstMapSubscriber.prototype._complete = function () {
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this.hasCompleted = true;
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if (!this.hasSubscription) {
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this.destination.complete();
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}
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};
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SwitchFirstMapSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
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var _a = this, resultSelector = _a.resultSelector, destination = _a.destination;
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if (resultSelector) {
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this.trySelectResult(outerValue, innerValue, outerIndex, innerIndex);
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}
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else {
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destination.next(innerValue);
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}
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};
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SwitchFirstMapSubscriber.prototype.trySelectResult = function (outerValue, innerValue, outerIndex, innerIndex) {
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var _a = this, resultSelector = _a.resultSelector, destination = _a.destination;
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try {
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var result = resultSelector(outerValue, innerValue, outerIndex, innerIndex);
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destination.next(result);
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}
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catch (err) {
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destination.error(err);
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}
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};
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SwitchFirstMapSubscriber.prototype.notifyError = function (err) {
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this.destination.error(err);
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};
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SwitchFirstMapSubscriber.prototype.notifyComplete = function () {
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this.hasSubscription = false;
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if (this.hasCompleted) {
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this.destination.complete();
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}
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};
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return SwitchFirstMapSubscriber;
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}(OuterSubscriber_1.OuterSubscriber));
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//# sourceMappingURL=exhaustMap.js.map
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