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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | 35x 35x 20x 20x 20x 19x 18x 19x 20x 35x | import { useCallback, useState } from 'react'
import { getOptionsCacheKey } from './getOptionsCacheKey'
import { FingerprintResponse } from './types'
import { UseVisitorDataOptions } from './useVisitorData'
export type UsePromiseStoreReturn = {
/**
* Accepts a callback that returns a promise (`requestCallback`)
* and optional parameters (`options`). Ensures that the same request identified by a cache key is
* only executed once at a time, and returns the stored promise for the request. The promise is
* removed from the store once it is resolved or rejected.
* */
doRequest: (
requestCallback: () => Promise<FingerprintResponse>,
options?: UseVisitorDataOptions
) => Promise<FingerprintResponse>
}
/**
* Manages a store of promises to handle unique asynchronous requests, ensuring that
* requests with the same key are not duplicated while they are still pending.
*/
export function usePromiseStore(): UsePromiseStoreReturn {
const [store] = useState(() => new Map<string, Promise<FingerprintResponse>>())
const doRequest = useCallback(
(requestCallback: () => Promise<FingerprintResponse>, options?: UseVisitorDataOptions) => {
const cacheKey = getOptionsCacheKey(options)
let cachedPromise = store.get(cacheKey)
if (!cachedPromise) {
cachedPromise = requestCallback().finally(() => {
store.delete(cacheKey)
})
store.set(cacheKey, cachedPromise)
}
return cachedPromise
},
[store]
)
return {
doRequest,
}
}
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