File size: 2,568 Bytes
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import * as React from 'react'
import { notifyManager, replaceEqualDeep } from '@tanstack/query-core'
import { useQueryClient } from './QueryClientProvider'
import type {
Mutation,
MutationCache,
MutationFilters,
MutationState,
QueryClient,
} from '@tanstack/query-core'
export function useIsMutating(
filters?: MutationFilters,
queryClient?: QueryClient,
): number {
const client = useQueryClient(queryClient)
return useMutationState(
{ filters: { ...filters, status: 'pending' } },
client,
).length
}
type MutationTypeFromResult<TResult> = [TResult] extends [
MutationState<
infer TData,
infer TError,
infer TVariables,
infer TOnMutateResult
>,
]
? Mutation<TData, TError, TVariables, TOnMutateResult>
: Mutation
type MutationStateOptions<
TResult = MutationState,
TMutation extends Mutation<any, any, any, any> =
MutationTypeFromResult<TResult>,
> = {
filters?: MutationFilters
select?: (mutation: TMutation) => TResult
}
function getResult<
TResult = MutationState,
TMutation extends Mutation<any, any, any, any> =
MutationTypeFromResult<TResult>,
>(
mutationCache: MutationCache,
options: MutationStateOptions<TResult, TMutation>,
): Array<TResult> {
return mutationCache
.findAll(options.filters)
.map(
(mutation): TResult =>
(options.select
? options.select(mutation as TMutation)
: mutation.state) as TResult,
)
}
export function useMutationState<
TResult = MutationState,
TMutation extends Mutation<any, any, any, any> =
MutationTypeFromResult<TResult>,
>(
options: MutationStateOptions<TResult, TMutation> = {},
queryClient?: QueryClient,
): Array<TResult> {
const mutationCache = useQueryClient(queryClient).getMutationCache()
const optionsRef = React.useRef(options)
const result = React.useRef<Array<TResult>>(null)
if (result.current === null) {
result.current = getResult(mutationCache, options)
}
React.useEffect(() => {
optionsRef.current = options
})
return React.useSyncExternalStore(
React.useCallback(
(onStoreChange) =>
mutationCache.subscribe(() => {
const nextResult = replaceEqualDeep(
result.current,
getResult(mutationCache, optionsRef.current),
)
if (result.current !== nextResult) {
result.current = nextResult
notifyManager.schedule(onStoreChange)
}
}),
[mutationCache],
),
() => result.current,
() => result.current,
)!
}
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