switchMap.js
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/** PURE_IMPORTS_START tslib,_map,_observable_from,_innerSubscribe PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { map } from './map';
import { from } from '../observable/from';
import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
export function switchMap(project, resultSelector) {
if (typeof resultSelector === 'function') {
return function (source) { return source.pipe(switchMap(function (a, i) { return from(project(a, i)).pipe(map(function (b, ii) { return resultSelector(a, b, i, ii); })); })); };
}
return function (source) { return source.lift(new SwitchMapOperator(project)); };
}
var SwitchMapOperator = /*@__PURE__*/ (function () {
function SwitchMapOperator(project) {
this.project = project;
}
SwitchMapOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new SwitchMapSubscriber(subscriber, this.project));
};
return SwitchMapOperator;
}());
var SwitchMapSubscriber = /*@__PURE__*/ (function (_super) {
tslib_1.__extends(SwitchMapSubscriber, _super);
function SwitchMapSubscriber(destination, project) {
var _this = _super.call(this, destination) || this;
_this.project = project;
_this.index = 0;
return _this;
}
SwitchMapSubscriber.prototype._next = function (value) {
var result;
var index = this.index++;
try {
result = this.project(value, index);
}
catch (error) {
this.destination.error(error);
return;
}
this._innerSub(result);
};
SwitchMapSubscriber.prototype._innerSub = function (result) {
var innerSubscription = this.innerSubscription;
if (innerSubscription) {
innerSubscription.unsubscribe();
}
var innerSubscriber = new SimpleInnerSubscriber(this);
var destination = this.destination;
destination.add(innerSubscriber);
this.innerSubscription = innerSubscribe(result, innerSubscriber);
if (this.innerSubscription !== innerSubscriber) {
destination.add(this.innerSubscription);
}
};
SwitchMapSubscriber.prototype._complete = function () {
var innerSubscription = this.innerSubscription;
if (!innerSubscription || innerSubscription.closed) {
_super.prototype._complete.call(this);
}
this.unsubscribe();
};
SwitchMapSubscriber.prototype._unsubscribe = function () {
this.innerSubscription = undefined;
};
SwitchMapSubscriber.prototype.notifyComplete = function () {
this.innerSubscription = undefined;
if (this.isStopped) {
_super.prototype._complete.call(this);
}
};
SwitchMapSubscriber.prototype.notifyNext = function (innerValue) {
this.destination.next(innerValue);
};
return SwitchMapSubscriber;
}(SimpleOuterSubscriber));
//# sourceMappingURL=switchMap.js.map