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import { useCallback, useEffect, useState } from 'react';
import { useIndexContext } from './useIndexContext';
import { useInstantSearchContext } from './useInstantSearchContext';
import type { UiState } from 'instantsearch.js';
export type SearchStateApi<TUiState extends UiState> = {
uiState: TUiState;
setUiState: (
uiState: TUiState | ((previousUiState: TUiState) => TUiState)
) => void;
indexUiState: TUiState[keyof TUiState];
setIndexUiState: (
indexUiState:
| TUiState[keyof TUiState]
| ((
previousIndexUiState: TUiState[keyof TUiState]
) => TUiState[keyof TUiState])
) => void;
};
export function useSearchState<
TUiState extends UiState
>(): SearchStateApi<TUiState> {
const search = useInstantSearchContext<TUiState>();
const searchIndex = useIndexContext();
const indexId = searchIndex.getIndexId();
const [uiState, setLocalUiState] = useState(() => search.getUiState());
const indexUiState = uiState[indexId] as TUiState[keyof TUiState];
const setUiState = useCallback<SearchStateApi<TUiState>['setUiState']>(
(nextUiState) => {
search.setUiState(nextUiState);
},
[search]
);
const setIndexUiState = useCallback<
SearchStateApi<TUiState>['setIndexUiState']
>(
(nextUiState) => {
setUiState((prevUiState) => ({
...prevUiState,
[indexId]:
typeof nextUiState === 'function'
? nextUiState(
prevUiState[indexId] as unknown as TUiState[keyof TUiState]
)
: nextUiState,
}));
},
[setUiState, indexId]
);
useEffect(() => {
function handleRender() {
setLocalUiState(search.getUiState());
}
search.addListener('render', handleRender);
return () => {
search.removeListener('render', handleRender);
};
}, [search, indexId]);
return {
uiState,
setUiState,
indexUiState,
setIndexUiState,
};
}
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