import { FormatDateTime } from "./dateutils";
/**
 * Returs true if the given year is a leap year
 *
 * @param {number} Year
 * @returns {boolean}
 * @category SysUtils
 */
declare function IsLeapYear(Year: number): boolean;
/**
 * Creates the given directory, Dir
 *
 * @param {string} Dir
 * @returns {boolean}
 * @category SysUtils
 */
declare function CreateDir(Dir: string): boolean;
/**
 * Checks if the given Dir exists or not.
 *
 * @param {string} Dir
 * @returns {boolean}
 * @category SysUtils
 */
declare function DirectoryExists(Dir: string): boolean;
export declare const faInvalid = -1;
export declare const faReadOnly = 1;
export declare const faHidden = 2;
export declare const faSysFile = 4;
export declare const faVolumeID = 8;
/**
 * The referenced item is a directory
 */
export declare const faDirectory = 16;
export declare const faArchive = 32;
/**
 *  * The referenced item is a file
 *
 * @type {128}
 */
export declare const faNormal = 128;
export declare const faTemporary = 256;
export declare const faSymLink = 1024;
export declare const faCompressed = 2048;
export declare const faEncrypted = 16384;
export declare const faVirtual = 65536;
export declare const faAnyFile = 511;
export type TSearchRec = {
    Time: number;
    Size: number;
    Attr: number;
    Name: string;
    ExcludeAttr: number;
    /**
     * Last time it was accessed or modified, whichever's later
     *
     * @type {Date}
     */
    LastAccessTime: Date;
    /**
     * Last modified time
     *
     * @type {Date}
     */
    TimeStamp: Date;
    CreationTime: number;
};
export type TFilterPredicate = (path: string, sr: TSearchRec) => boolean;
/**
 * Get subdirectories from the given path, using the given predicate to filter out items
 *
 * @param {string} path
 * @param {TFilterPredicate} predicate
 * @returns {string[]}
 * @category SysUtils
 */
declare function GetDirectories(path: string, predicate: TFilterPredicate): string[];
/**
 * Removes the given directory, Dir
 *
 * @param {string} Dir
 * @param {?boolean} [Recursive]
 * @returns {boolean}
 * @throws ENOENT
 * @throws ENOTDIR
 * @category SysUtils
 */
declare function RemoveDir(Dir: string, Recursive?: boolean): boolean;
/**
 * Gets the current working directory
 * @returns The current working directory
 * @category SysUtils
 */
declare function GetCurrentDir(): string;
/**
 * Changes the current working directory to the specified directory
 * @param newDir New working directory
 * @category SysUtils
 */
declare function SetCurrentDir(newDir: string): void;
/**
 * Extracts the drive and directory parts from AFileName.
 * Regardless of whether AFileName is a path or filename,
 * this routine returns the path up to the last path.sep
 * eg, AFileName contains K:\\Development\\TypeScript\\delphirtl\\tests
 * the result is K:\\Development\\TypeScript\\delphirtl
 *
 * @param {string} AFileNameOrPath
 * @returns {string}
 * @category SysUtils
 */
declare function ExtractFileDir(AFileNameOrPath: string): string;
/**
 * Extracts the file extension, given the filename, AFileName
 * For example, if given "Nothing.pas", returns "pas"
 * If given "Nothing", returns ""
 *
 * @param {string} AFilename
 * @returns {string}
 * @category SysUtils
 */
declare function ExtractFileExt(AFilename: string): string;
/**
 * Extracts the name and extension parts of a file name.
 *
 * The resulting string is the rightmost characters of FileName, starting with the first character after
 *  the colon or backslash that separates the path information from the name and extension. The resulting
 * string is equal to FileName, if FileName contains no drive and directory parts.
 * @param AFileName
 * @returns
 * @category SysUtils
 */
declare function ExtractFileName(AFileName: string): string;
/**
 * Checks if the given filename exists
 *
 * @param {string} AFileName Filename to check existence for.
 * @returns {boolean} true if the given filename exists, false otherwise.
 * @category SysUtils
 */
declare function FileExists(AFileName: string): boolean;
/**
 * Adds a path delimiter to the given string. If the path delimiter is already at the end of the string, does nothing.
 *
 * @param {string} APath Given path to check for delimiter to add to
 * @returns {string} The path with added delimiter
 * @category SysUtils
 */
declare function IncludeTrailingPathDelimiter(APath: string): string;
/**
 * Description placeholder
 *
 * @param {string} str
 * @returns {string}
 * @category SysUtils
 */
declare function LowerCase(str: string): string;
/**
 * Description placeholder
 *
 * @param {string} str
 * @returns {string}
 * @category SysUtils
 */
declare function UpperCase(str: string): string;
/**
 * Deletes the given name from the environment variable
 *
 * @param {string} Name
 * @category SysUtils
 */
declare function DeleteEnvironmentVariable(Name: string): void;
/**
 * Only environment variables starting with ENV_REACT_PREFIX are returned in React
 *
 * @type {"REACT_APP_"}
 * @category Constants
 */
declare const ENV_REACT_PREFIX = "REACT_APP_";
/**
 * Only environment variables starting with ENV_NEXT_PREFIX are returned in Nextjs
 *
 * @type {"NEXT_PUBLIC_"}
 * @category Constants
 */
declare const ENV_NEXT_PREFIX = "NEXT_PUBLIC_";
/**
 * Retrieves the contents of the specified variable from the environment block
 *
 * @param Name The name of the environment variable to retrieve
 * @returns The value of the given environment variable
 * @category SysUtils
 */
declare function GetEnvironmentVariable(Name: string): string;
/**
 * Checks if an environment variable exists
 *
 * @param {string} Name
 * @returns {boolean}
 * @category SysUtils
 */
declare function ExistsEnvironmentVariable(Name: string): boolean;
/**
 * Sets the specified variable in the environment with the given value
 *
 * @param {string} Name
 * @param {string} Value
 * @category SysUtils
 */
declare function SetEnvironmentVariable(Name: string, Value: string): void;
/**
 * An object
 *
 * @typedef {ArbitraryObject}
 * @category SysUtils
 */
export type ArbitraryObject = {
    [key: string]: unknown;
};
/**
 * Checks if the given parameter is an object
 * @param potentialObj item to check as an object
 * @returns boolean
 * @category SysUtils
 */
declare function isArbitraryObject(potentialObj: unknown): potentialObj is ArbitraryObject;
/**
 * Checks that obj is an object, and it has a field named fieldName and that its type is fieldType
 * Assuming e is an object with the field code of type string.
 * * If you use this, then the expression following it is valid, for example:
 *   - hasFieldOfType<string>(e, "code", "string") && e.code === "INSUFFICIENT_FUNDS")
 * * If you do not use it, then
 *   - e.code is invalid when checked by code analyzer
 * @param obj
 * @param fieldName
 * @param fieldType
 * @returns
 * @category SysUtils
 */
declare function hasFieldOfType<T>(obj: unknown, fieldName: string, fieldType: string): obj is {
    [fieldName: string]: T;
};
/**
 * Checks if the given object has a message field of string type
 *
 * @param obj
 * @returns
 * @category SysUtils
 */
declare function hasMessageField(obj: unknown): obj is {
    message: string;
};
export { CreateDir, DirectoryExists, GetDirectories, GetCurrentDir, SetCurrentDir, RemoveDir, ExtractFileDir, ExtractFileExt, ExtractFileName, FileExists, FormatDateTime, IncludeTrailingPathDelimiter, LowerCase, UpperCase, LowerCase as lowerCase, UpperCase as upperCase, DeleteEnvironmentVariable, ExistsEnvironmentVariable, GetEnvironmentVariable, SetEnvironmentVariable, hasMessageField, hasFieldOfType, isArbitraryObject, IsLeapYear, ENV_NEXT_PREFIX, ENV_REACT_PREFIX };