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node_modules/rxjs/_esm2015/internal/operators/exhaustMap.js

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+import { OuterSubscriber } from '../OuterSubscriber';
+import { InnerSubscriber } from '../InnerSubscriber';
+import { subscribeToResult } from '../util/subscribeToResult';
+import { map } from './map';
+import { from } from '../observable/from';
+export function exhaustMap(project, resultSelector) {
+    if (resultSelector) {
+        return (source) => source.pipe(exhaustMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));
+    }
+    return (source) => source.lift(new ExhaustMapOperator(project));
+}
+class ExhaustMapOperator {
+    constructor(project) {
+        this.project = project;
+    }
+    call(subscriber, source) {
+        return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));
+    }
+}
+class ExhaustMapSubscriber extends OuterSubscriber {
+    constructor(destination, project) {
+        super(destination);
+        this.project = project;
+        this.hasSubscription = false;
+        this.hasCompleted = false;
+        this.index = 0;
+    }
+    _next(value) {
+        if (!this.hasSubscription) {
+            this.tryNext(value);
+        }
+    }
+    tryNext(value) {
+        let result;
+        const index = this.index++;
+        try {
+            result = this.project(value, index);
+        }
+        catch (err) {
+            this.destination.error(err);
+            return;
+        }
+        this.hasSubscription = true;
+        this._innerSub(result, value, index);
+    }
+    _innerSub(result, value, index) {
+        const innerSubscriber = new InnerSubscriber(this, value, index);
+        const destination = this.destination;
+        destination.add(innerSubscriber);
+        const innerSubscription = subscribeToResult(this, result, undefined, undefined, innerSubscriber);
+        if (innerSubscription !== innerSubscriber) {
+            destination.add(innerSubscription);
+        }
+    }
+    _complete() {
+        this.hasCompleted = true;
+        if (!this.hasSubscription) {
+            this.destination.complete();
+        }
+        this.unsubscribe();
+    }
+    notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
+        this.destination.next(innerValue);
+    }
+    notifyError(err) {
+        this.destination.error(err);
+    }
+    notifyComplete(innerSub) {
+        const destination = this.destination;
+        destination.remove(innerSub);
+        this.hasSubscription = false;
+        if (this.hasCompleted) {
+            this.destination.complete();
+        }
+    }
+}
+//# sourceMappingURL=exhaustMap.js.map