1 | import { map } from './map';
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2 | import { from } from '../observable/from';
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3 | import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
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4 | export function exhaustMap(project, resultSelector) {
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5 | if (resultSelector) {
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6 | return (source) => source.pipe(exhaustMap((a, i) => from(project(a, i)).pipe(map((b, ii) => resultSelector(a, b, i, ii)))));
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7 | }
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8 | return (source) => source.lift(new ExhaustMapOperator(project));
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9 | }
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10 | class ExhaustMapOperator {
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11 | constructor(project) {
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12 | this.project = project;
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13 | }
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14 | call(subscriber, source) {
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15 | return source.subscribe(new ExhaustMapSubscriber(subscriber, this.project));
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16 | }
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17 | }
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18 | class ExhaustMapSubscriber extends SimpleOuterSubscriber {
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19 | constructor(destination, project) {
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20 | super(destination);
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21 | this.project = project;
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22 | this.hasSubscription = false;
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23 | this.hasCompleted = false;
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24 | this.index = 0;
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25 | }
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26 | _next(value) {
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27 | if (!this.hasSubscription) {
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28 | this.tryNext(value);
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29 | }
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30 | }
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31 | tryNext(value) {
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32 | let result;
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33 | const index = this.index++;
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34 | try {
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35 | result = this.project(value, index);
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36 | }
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37 | catch (err) {
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38 | this.destination.error(err);
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39 | return;
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40 | }
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41 | this.hasSubscription = true;
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42 | this._innerSub(result);
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43 | }
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44 | _innerSub(result) {
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45 | const innerSubscriber = new SimpleInnerSubscriber(this);
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46 | const destination = this.destination;
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47 | destination.add(innerSubscriber);
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48 | const innerSubscription = innerSubscribe(result, innerSubscriber);
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49 | if (innerSubscription !== innerSubscriber) {
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50 | destination.add(innerSubscription);
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51 | }
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52 | }
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53 | _complete() {
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54 | this.hasCompleted = true;
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55 | if (!this.hasSubscription) {
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56 | this.destination.complete();
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57 | }
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58 | this.unsubscribe();
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59 | }
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60 | notifyNext(innerValue) {
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61 | this.destination.next(innerValue);
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62 | }
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63 | notifyError(err) {
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64 | this.destination.error(err);
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65 | }
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66 | notifyComplete() {
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67 | this.hasSubscription = false;
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68 | if (this.hasCompleted) {
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69 | this.destination.complete();
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70 | }
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71 | }
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72 | }
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73 | //# sourceMappingURL=exhaustMap.js.map |
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