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refactor(tangle-dapp): Fetch all NFTs at once
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,55 +1,46 @@ | ||
| import { useEffect, useRef, useState } from 'react'; | ||
|
|
||
| export enum PollingPrimaryCacheKey { | ||
| EXCHANGE_RATE, | ||
| CONTRACT_READ_SUBSCRIPTION, | ||
| LS_ERC20_BALANCE, | ||
| } | ||
| import { useCallback, useEffect, useState } from 'react'; | ||
|
|
||
| export type PollingOptions<T> = { | ||
| fetcher: (() => Promise<T> | T) | null; | ||
| effect: (() => Promise<T> | T) | null; | ||
| refreshInterval?: number; | ||
| }; | ||
|
|
||
| const usePolling = <T>({ | ||
| fetcher, | ||
| // Default to a 6 second refresh interval. | ||
| refreshInterval = 6_000, | ||
| effect, | ||
| // Default to a 12 second refresh interval. | ||
| refreshInterval = 12_000, | ||
| }: PollingOptions<T>) => { | ||
| const [value, setValue] = useState<T | null>(null); | ||
| const [isRefreshing, setIsRefreshing] = useState(false); | ||
| const lastUpdatedTimestampRef = useRef(Date.now()); | ||
|
|
||
| useEffect(() => { | ||
| const intervalHandle = setInterval(async () => { | ||
| // Fetcher isn't ready to be called yet. | ||
| if (fetcher === null) { | ||
| return; | ||
| } | ||
| const refresh = useCallback(async () => { | ||
| // Fetcher isn't ready to be called yet. | ||
| if (effect === null) { | ||
| return; | ||
| } | ||
|
|
||
| const now = Date.now(); | ||
| const difference = now - lastUpdatedTimestampRef.current; | ||
| setIsRefreshing(true); | ||
| await effect(); | ||
| setIsRefreshing(false); | ||
| }, [effect]); | ||
|
|
||
| // Don't refresh if the last refresh was less than | ||
| // the refresh interval ago. This prevents issues where | ||
| // the fetcher is unstable and the setInterval gets called | ||
| // multiple times before the fetcher resolves. | ||
| if (difference < refreshInterval) { | ||
| return; | ||
| } | ||
| useEffect(() => { | ||
| let intervalHandle: ReturnType<typeof setInterval> | null = null; | ||
|
|
||
| (async () => { | ||
| // Call it immediately to avoid initial delay. | ||
| await refresh(); | ||
|
|
||
| setIsRefreshing(true); | ||
| setValue(await fetcher()); | ||
| lastUpdatedTimestampRef.current = now; | ||
| setIsRefreshing(false); | ||
| }, refreshInterval); | ||
| intervalHandle = setInterval(refresh, refreshInterval); | ||
| })(); | ||
|
|
||
| return () => { | ||
| clearInterval(intervalHandle); | ||
| if (intervalHandle !== null) { | ||
| clearInterval(intervalHandle); | ||
| } | ||
| }; | ||
| }, [fetcher, refreshInterval]); | ||
| }, [effect, refresh, refreshInterval]); | ||
|
|
||
| return { value, isRefreshing }; | ||
| return isRefreshing; | ||
| }; | ||
|
|
||
| export default usePolling; |
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