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import * as React from 'react';
export interface Selection<T = string> {
deselectAll: () => void;
deselectOne: (key: T) => void;
selectAll: () => void;
selectOne: (key: T) => void;
selected: Set<T>;
selectedAny: boolean;
selectedAll: boolean;
}
// IMPORTANT: To prevent infinite loop, `keys` argument must be memoized with React.useMemo hook.
export function useSelection<T = string>(keys: T[] = []): Selection<T> {
const [selected, setSelected] = React.useState<Set<T>>(new Set());
React.useEffect(() => {
setSelected(new Set());
}, [keys]);
const handleDeselectAll = React.useCallback(() => {
setSelected(new Set());
}, []);
const handleDeselectOne = React.useCallback((key: T) => {
setSelected((prev) => {
const copy = new Set(prev);
copy.delete(key);
return copy;
});
}, []);
const handleSelectAll = React.useCallback(() => {
setSelected(new Set(keys));
}, [keys]);
const handleSelectOne = React.useCallback((key: T) => {
setSelected((prev) => {
const copy = new Set(prev);
copy.add(key);
return copy;
});
}, []);
const selectedAny = selected.size > 0;
const selectedAll = selected.size === keys.length;
return {
deselectAll: handleDeselectAll,
deselectOne: handleDeselectOne,
selectAll: handleSelectAll,
selectOne: handleSelectOne,
selected,
selectedAny,
selectedAll,
};
}
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