deno.land / x / jotai@v1.8.4 / src / query / atomWithQuery.ts

atomWithQuery.ts
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import { QueryClient, QueryObserver } from '@tanstack/query-core'import type { QueryKey, QueryObserverOptions, QueryObserverResult,} from '@tanstack/query-core'import { atom } from 'jotai'import type { WritableAtom } from 'jotai'import { queryClientAtom } from './queryClientAtom'import type { CreateQueryOptions, GetQueryClient } from './types'
type Timeout = ReturnType<typeof setTimeout>
type AtomWithQueryAction = { type: 'refetch'}
export interface AtomWithQueryOptions< TQueryFnData, TError, TData, TQueryData, TQueryKey extends QueryKey> extends QueryObserverOptions< TQueryFnData, TError, TData, TQueryData, TQueryKey > { queryKey: TQueryKey}
export interface AtomWithQueryOptionsWithEnabled< TQueryFnData, TError, TData, TQueryData, TQueryKey extends QueryKey> extends Omit< AtomWithQueryOptions<TQueryFnData, TError, TData, TQueryData, TQueryKey>, 'enabled' > { enabled: boolean}
export function atomWithQuery< TQueryFnData, TError, TData = TQueryFnData, TQueryData = TQueryFnData, TQueryKey extends QueryKey = QueryKey>( createQuery: CreateQueryOptions< AtomWithQueryOptionsWithEnabled< TQueryFnData, TError, TData, TQueryData, TQueryKey > >, getQueryClient?: GetQueryClient): WritableAtom<TData | undefined, AtomWithQueryAction>
export function atomWithQuery< TQueryFnData, TError, TData = TQueryFnData, TQueryData = TQueryFnData, TQueryKey extends QueryKey = QueryKey>( createQuery: CreateQueryOptions< AtomWithQueryOptions<TQueryFnData, TError, TData, TQueryData, TQueryKey> >, getQueryClient?: GetQueryClient): WritableAtom<TData, AtomWithQueryAction>
export function atomWithQuery< TQueryFnData, TError, TData = TQueryFnData, TQueryData = TQueryFnData, TQueryKey extends QueryKey = QueryKey>( createQuery: CreateQueryOptions< AtomWithQueryOptions<TQueryFnData, TError, TData, TQueryData, TQueryKey> >, getQueryClient: GetQueryClient = (get) => get(queryClientAtom)): WritableAtom<TData | undefined, AtomWithQueryAction, void | Promise<void>> { type Result = QueryObserverResult<TData, TError>
// HACK: having state in atom creator function is not ideal // because, unlike hooks, it's shared by multiple providers. const previousDataCache = new WeakMap<QueryClient, TData>()
const queryDataAtom = atom((get) => { const queryClient = getQueryClient(get) const options = typeof createQuery === 'function' ? createQuery(get) : createQuery const observer = new QueryObserver(queryClient, options) const initialResult = observer.getCurrentResult() if ( initialResult.data === undefined && options.keepPreviousData && previousDataCache.has(queryClient) ) { initialResult.data = previousDataCache.get(queryClient) }
let resolve: ((result: Result) => void) | null = null const makePending = () => new Promise<Result>((r) => { resolve = r }) const resultAtom = atom<Result | Promise<Result>>( initialResult.data === undefined && options.enabled !== false ? makePending() : initialResult ) let setResult: ((result: Result) => void) | null = null const listener = (result: Result) => { if (result.isFetching || (!result.isError && result.data === undefined)) { return } if (!resolve && !setResult) { throw new Error('setting result without mount') } if (resolve) { resolve(result) resolve = null } if (setResult) { setResult(result) } if (result.data !== undefined) { previousDataCache.set(queryClient, result.data) } } let unsubscribe: (() => void) | null = null let timer: Timeout | undefined const startQuery = () => { if (!setResult && unsubscribe) { clearTimeout(timer) unsubscribe() unsubscribe = null } if (options.enabled !== false) { if (setResult) { observer.refetch({ cancelRefetch: true }).then(setResult) } else { unsubscribe = observer.subscribe(listener) } } if (!setResult) { // not mounted yet timer = setTimeout(() => { if (unsubscribe) { unsubscribe() unsubscribe = null } }, 1000) } } startQuery() resultAtom.onMount = (update) => { setResult = update if (unsubscribe) { clearTimeout(timer) } else { startQuery() } return () => { setResult = null if (unsubscribe) { unsubscribe() // FIXME why does this fail? // unsubscribe = null } } } return { resultAtom, makePending, startQuery } })
const queryAtom = atom( (get) => { const { resultAtom } = get(queryDataAtom) const result = get(resultAtom) if (result.isError) { throw result.error } return result.data }, (get, set, action: AtomWithQueryAction) => { const { resultAtom, makePending, startQuery } = get(queryDataAtom) switch (action.type) { case 'refetch': { set(resultAtom, makePending()) startQuery() } } } )
return queryAtom}
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Tagged at
2 years ago