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3da38d6e | 1 | import { uniq } from 'lodash-es' |
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2 | import { Observable } from 'rxjs' |
3 | import { bufferTime, distinctUntilChanged, filter, map, share, switchMap } from 'rxjs/operators' | |
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4 | |
5 | function buildBulkObservable <T extends number | string, R> (options: { | |
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6 | notifierObservable: Observable<T> |
7 | time: number | |
8 | bulkGet: (params: T[]) => Observable<R> | |
9 | }) { | |
afb7d2d5 | 10 | const { notifierObservable, time, bulkGet } = options |
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11 | |
12 | return notifierObservable.pipe( | |
13 | distinctUntilChanged(), | |
afb7d2d5 | 14 | bufferTime(time), |
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15 | filter(params => params.length !== 0), |
16 | map(params => uniq(params)), | |
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17 | switchMap(params => bulkGet(params)), |
18 | share() | |
19 | ) | |
20 | } | |
21 | ||
22 | export { | |
23 | buildBulkObservable | |
24 | } |