import { Any, Json } from './types';
export declare const GUID_REGEX: RegExp;
export declare const ELLIPSIS = "\u2026";
/**
 * Check if a string is a valid GUID.
 *
 * @param guid - The string to check.
 * @returns - True if the string is a valid GUID.
 */
export declare function isGuid(guid: string): boolean;
/**
 * Decode HTML entities like   in a string.
 *
 * @param html - The string to decode.
 * @returns - The decoded string.
 */
export declare function decodeHtmlEntities(html: string): string;
/**
 * Remove HTML tags from a string.
 *
 * @param text - The string to remove tags from.
 * @param exceptions - The tags to keep.
 * @returns - The string with the tags removed.
 */
export declare function removeHtmlTags(text: string, ...exceptions: string[]): string;
/**
 * Escape special characters in a string for use in a regular expression.
 *
 * @param text - The string to escape.
 * @returns - The escaped string.
 */
export declare function escapeRegExp(text?: string): string | undefined;
/**
 * Mark matches in a string with HTML tags (or other markers).
 *
 * @param text - The string to mark.
 * @param mark - The string to mark.
 * @param before - The HTML tag to add before the match (default: "<mark>").
 * @param after - The HTML tag to add after the match (default: "</mark>").
 * @returns - The string with the matches marked.
 */
export declare function markMatches(text?: string, mark?: string, before?: string, after?: string): string;
/**
 * Truncate a string to a specified length.
 *
 * @param text - The string to truncate.
 * @param length - The maximum length of the truncated string.
 * @param ellipsis - The string to append to the truncated string (default: "…").
 * @returns - The truncated string.
 */
export declare function truncate(text: string, length: number, ellipsis?: string): string;
/**
 * Remove duplicate values from a string list.
 *
 * @param text - The string list to remove duplicates from.
 * @param delimiter - The character that separates the values (default: ",").
 * @param joiner - The character that joins the values back together (default: delimiter + " ").
 * @returns - A string list with duplicates removed.
 */
export declare function removeDuplicates(text: string, delimiter?: string, joiner?: string): string;
export declare function toBase64(string: string): string;
export declare function fromBase64(b64: string): string;
export declare function jsonToBase64<T = Json>(obj: T, replacer?: (key: string, value: Any) => Any): string;
export declare function base64ToJson<T = Json>(b64: string, reviver?: (key: string, value: Any) => Any): T;
/**
 * Return the size of the specified string in kilobytes.
 *
 * @param str - The string to measure.
 * @param asB64 - Whether to measure the size as base64 (default: true).
 * @returns - The size of the string in kilobytes.
 */
export declare function size(str: string, asB64?: boolean): number;
/**
 * Convert a size in kilobytes to a character count.
 *
 * @param kb - The size in kilobytes.
 * @param asB64 - Whether to convert as base64 (default: true).
 * @returns - The character count.
 */
export declare function sizeToChars(kb: number, asB64?: boolean): number;
/**
 * Convert a character count to a size in kilobytes.
 *
 * @param chars - The character count.
 * @param asB64 - Whether to convert as base64 (default: true).
 * @returns - The size in kilobytes.
 */
export declare function charsToSize(chars: number, asB64?: boolean): number;