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node_modules/rxjs/_esm5/internal/operators/switchMap.js

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+/** PURE_IMPORTS_START tslib,_OuterSubscriber,_InnerSubscriber,_util_subscribeToResult,_map,_observable_from PURE_IMPORTS_END */
+import * as tslib_1 from "tslib";
+import { OuterSubscriber } from '../OuterSubscriber';
+import { InnerSubscriber } from '../InnerSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+import { map } from './map';
+import { from } from '../observable/from';
+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, value, index);
+    };
+    SwitchMapSubscriber.prototype._innerSub = function (result, value, index) {
+        var innerSubscription = this.innerSubscription;
+        if (innerSubscription) {
+            innerSubscription.unsubscribe();
+        }
+        var innerSubscriber = new InnerSubscriber(this, value, index);
+        var destination = this.destination;
+        destination.add(innerSubscriber);
+        this.innerSubscription = subscribeToResult(this, result, undefined, undefined, 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 = null;
+    };
+    SwitchMapSubscriber.prototype.notifyComplete = function (innerSub) {
+        var destination = this.destination;
+        destination.remove(innerSub);
+        this.innerSubscription = null;
+        if (this.isStopped) {
+            _super.prototype._complete.call(this);
+        }
+    };
+    SwitchMapSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
+        this.destination.next(innerValue);
+    };
+    return SwitchMapSubscriber;
+}(OuterSubscriber));
+//# sourceMappingURL=switchMap.js.map