import { URLSearchParamsObject } from './string.types';
/**
 * Separator for variant data files saved to storage.
 *
 * @remarks
 * Refers to the separator that is used by variant data files when they are
 * saved. If a "master" data file name is "12345.json", and its variant keys
 * are "card" and "search", its resulting variant file names are:
 *   - 12345--card.json
 *   - 12345--search.json
 * @see ExporterPluginInterface::VARIANT_SEPARATOR in https://www.drupal.org/project/static_suite
 *
 * @sealed
 * Not intended to be over ride.
 */
export declare const VARIANT_SEPARATOR = "--";
/**
 * Parses a JSON string and logs an error on failure.
 *
 * @param jsonString - The string to be parsed.
 *
 * @returns A JSON object or null on error.
 */
export declare const parseJsonString: (jsonString: string) => any;
/**
 * Parses a raw URL search (aka "query string") into an object.
 *
 * @remarks
 * Turns a string like "arg1=a&arg2=b" into an object like
 * \{ arg1: 'a', arg2: 'b'\}
 *
 * @param queryString - A raw URL search string
 *
 * @returns An object where its keys are the query arguments.
 */
export declare const parseURLSearchParams: (queryString: string) => URLSearchParamsObject;
/**
 * Parses a unique id from Static Suite and returns a Date.
 *
 * @param uniqueId - A unique id from Static Suite
 *
 * @returns A date from that unique id, or null if it can be parsed.
 */
export declare const parseUniqueId: (uniqueId: string) => Date | null;
/**
 * Checks that a string is a unique id.
 *
 * @param uniqueId - A unique id to be checked
 */
export declare const isUniqueId: (uniqueId: string) => boolean;
/**
 * Creates a hash from a string
 *
 * @param data - A string of data
 */
export declare const createHash: (data: string) => string;
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