1 | "use strict";
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2 | var __extends = (this && this.__extends) || (function () {
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3 | var extendStatics = function (d, b) {
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4 | extendStatics = Object.setPrototypeOf ||
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5 | ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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6 | function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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7 | return extendStatics(d, b);
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8 | }
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9 | return function (d, b) {
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10 | extendStatics(d, b);
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11 | function __() { this.constructor = d; }
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12 | d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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13 | };
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14 | })();
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15 | Object.defineProperty(exports, "__esModule", { value: true });
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16 | var map_1 = require("./map");
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17 | var from_1 = require("../observable/from");
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18 | var innerSubscribe_1 = require("../innerSubscribe");
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19 | function switchMap(project, resultSelector) {
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20 | if (typeof resultSelector === 'function') {
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21 | return function (source) { return source.pipe(switchMap(function (a, i) { return from_1.from(project(a, i)).pipe(map_1.map(function (b, ii) { return resultSelector(a, b, i, ii); })); })); };
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22 | }
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23 | return function (source) { return source.lift(new SwitchMapOperator(project)); };
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24 | }
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25 | exports.switchMap = switchMap;
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26 | var SwitchMapOperator = (function () {
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27 | function SwitchMapOperator(project) {
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28 | this.project = project;
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29 | }
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30 | SwitchMapOperator.prototype.call = function (subscriber, source) {
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31 | return source.subscribe(new SwitchMapSubscriber(subscriber, this.project));
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32 | };
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33 | return SwitchMapOperator;
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34 | }());
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35 | var SwitchMapSubscriber = (function (_super) {
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36 | __extends(SwitchMapSubscriber, _super);
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37 | function SwitchMapSubscriber(destination, project) {
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38 | var _this = _super.call(this, destination) || this;
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39 | _this.project = project;
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40 | _this.index = 0;
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41 | return _this;
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42 | }
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43 | SwitchMapSubscriber.prototype._next = function (value) {
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44 | var result;
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45 | var index = this.index++;
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46 | try {
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47 | result = this.project(value, index);
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48 | }
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49 | catch (error) {
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50 | this.destination.error(error);
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51 | return;
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52 | }
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53 | this._innerSub(result);
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54 | };
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55 | SwitchMapSubscriber.prototype._innerSub = function (result) {
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56 | var innerSubscription = this.innerSubscription;
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57 | if (innerSubscription) {
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58 | innerSubscription.unsubscribe();
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59 | }
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60 | var innerSubscriber = new innerSubscribe_1.SimpleInnerSubscriber(this);
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61 | var destination = this.destination;
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62 | destination.add(innerSubscriber);
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63 | this.innerSubscription = innerSubscribe_1.innerSubscribe(result, innerSubscriber);
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64 | if (this.innerSubscription !== innerSubscriber) {
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65 | destination.add(this.innerSubscription);
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66 | }
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67 | };
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68 | SwitchMapSubscriber.prototype._complete = function () {
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69 | var innerSubscription = this.innerSubscription;
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70 | if (!innerSubscription || innerSubscription.closed) {
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71 | _super.prototype._complete.call(this);
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72 | }
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73 | this.unsubscribe();
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74 | };
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75 | SwitchMapSubscriber.prototype._unsubscribe = function () {
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76 | this.innerSubscription = undefined;
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77 | };
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78 | SwitchMapSubscriber.prototype.notifyComplete = function () {
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79 | this.innerSubscription = undefined;
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80 | if (this.isStopped) {
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81 | _super.prototype._complete.call(this);
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82 | }
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83 | };
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84 | SwitchMapSubscriber.prototype.notifyNext = function (innerValue) {
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85 | this.destination.next(innerValue);
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86 | };
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87 | return SwitchMapSubscriber;
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88 | }(innerSubscribe_1.SimpleOuterSubscriber));
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89 | //# sourceMappingURL=switchMap.js.map |
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