import { ThSortType } from '@patternfly/react-table/dist/esm/components/Table/base';
import { Field, SortType } from '../types';
import { Column } from './types';
/**
 * Compares all types by converting them to string.
 * Nullish entities are converted to empty string.
 * @see localeCompare
 * @param locale to be used by string comparator
 */
export declare const universalComparator: (a: any, b: any, locale: string) => number;
/**
 * Creates a comparator function based on provided current sort definition.
 * If there is no sort defined then comparator considers all entities equal.
 *
 * @see universalComparator
 * @param currentSort
 * @param locale defaults to "en"
 * @param fieldComparator (optional) custom field comparator. Defaults to universal string based comparator.
 * @returns comparator function
 */
export declare function compareWith(currentSort: SortType, locale: string, fieldComparator: (a: any, b: any, locale: string) => number): (a: any, b: any) => number;
/**
 * Hook for maintaining sort state. Supported features:
 * 1) by default sort by the first identity column or by the first column available if there is no identity column
 * 2) build comparator based on the current active sort definition
 *
 * @param fields (read only) field metadata
 * @returns [activeSort, setActiveSort, comparator]
 */
export declare const useSort: (fields: Field[]) => [SortType, (sort: SortType) => void, (a: any, b: any) => number];
/**
 * Builds table specific sort definition based on provided active sort definition.
 * @see ThSortType
 */
export declare const buildSort: ({ columnIndex, columns, activeSort, setActiveSort, }: {
    columnIndex: number;
    columns: Column[];
    activeSort: SortType;
    setActiveSort: (sort: SortType) => void;
}) => ThSortType;