rxjs
Version:
Reactive Extensions for modern JavaScript
83 lines • 3.25 kB
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 __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var OuterSubscriber_1 = require("../OuterSubscriber");
var subscribeToResult_1 = require("../util/subscribeToResult");
var map_1 = require("./map");
var from_1 = require("../observable/from");
function exhaustMap(project, resultSelector) {
if (resultSelector) {
return function (source) { return source.pipe(exhaustMap(function (a, i) { return from_1.from(project(a, i)).pipe(map_1.map(function (b, ii) { return resultSelector(a, b, i, ii); })); })); };
}
return function (source) {
return source.lift(new ExhauseMapOperator(project));
};
}
exports.exhaustMap = exhaustMap;
var ExhauseMapOperator = (function () {
function ExhauseMapOperator(project) {
this.project = project;
}
ExhauseMapOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));
};
return ExhauseMapOperator;
}());
var ExhaustMapSubscriber = (function (_super) {
__extends(ExhaustMapSubscriber, _super);
function ExhaustMapSubscriber(destination, project) {
var _this = _super.call(this, destination) || this;
_this.project = project;
_this.hasSubscription = false;
_this.hasCompleted = false;
_this.index = 0;
return _this;
}
ExhaustMapSubscriber.prototype._next = function (value) {
if (!this.hasSubscription) {
this.tryNext(value);
}
};
ExhaustMapSubscriber.prototype.tryNext = function (value) {
var index = this.index++;
var destination = this.destination;
try {
var result = this.project(value, index);
this.hasSubscription = true;
this.add(subscribeToResult_1.subscribeToResult(this, result, value, index));
}
catch (err) {
destination.error(err);
}
};
ExhaustMapSubscriber.prototype._complete = function () {
this.hasCompleted = true;
if (!this.hasSubscription) {
this.destination.complete();
}
};
ExhaustMapSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
this.destination.next(innerValue);
};
ExhaustMapSubscriber.prototype.notifyError = function (err) {
this.destination.error(err);
};
ExhaustMapSubscriber.prototype.notifyComplete = function (innerSub) {
this.remove(innerSub);
this.hasSubscription = false;
if (this.hasCompleted) {
this.destination.complete();
}
};
return ExhaustMapSubscriber;
}(OuterSubscriber_1.OuterSubscriber));
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