import { DateTime, Duration, Interval, FixedOffsetZone } from "luxon";
export declare const XML_MIME = "application/xml";
export declare const JSON_MIME = "application/json";
export declare const JSONAPI_MIME = "application/vnd.api+json";
export declare const SVG_MIME = "image/svg+xml";
export declare const TEXT_MIME = "text/plain";
export declare const BINARY_MIME = "application/octet-stream";
export declare const UTC_OPTIONS: {
    zone: FixedOffsetZone;
};
export declare function hasArgs(value: unknown): boolean;
export declare function hasNoArgs(value: unknown): boolean;
export declare function isStringArg(value: unknown): value is string;
export declare function isNumArg(value: unknown): value is number;
export declare function isNonEmptyStringArg(value: unknown): value is string;
export declare function isObject(obj: unknown): obj is object;
export declare function isDef<Value>(value: Value | undefined | null): value is Value;
export declare function reErrorWithMessage(err: unknown, message: string): Error;
export interface StringDictionary {
    [index: string]: unknown;
}
export declare function asStringDictionary(inobj: unknown): StringDictionary;
export declare function doStringGetterSetter(inobj: unknown, field: string, value?: string): unknown;
export declare function doBoolGetterSetter(inobj: unknown, field: string, value?: boolean): unknown;
export declare function doIntGetterSetter(inobj: unknown, field: string, value?: number): unknown;
export declare function doFloatGetterSetter(inobj: unknown, field: string, value?: number): StringDictionary;
export declare function doMomentGetterSetter(inobj: unknown, field: string, value?: DateTime | string): StringDictionary;
/**
 * Converts entire DataView to a string as utf-8.
 *
 * @param   dataView bytes to convert
 * @returns           the string
 */
export declare function dataViewToString(dataView: DataView): string;
/**
 * Log a message to the console. Put here to limit lint console errors
 * for the times we really do want to use console.log. Will also append a
 * p tag to a div#debug if it exists.
 *
 * @param   msg the message to log
 */
export declare function log(msg: string): void;
/**
 * typescript-y check if Error.
 *
 * @param error object that might be an Error
 * @returns true if Error object
 */
export declare function isError(error: unknown): error is Error;
/**
 * typescript-y convert errors.
 *
 * @param maybeError obejct that might be an Error object
 * @returns an Error object
 */
export declare function toError(maybeError: unknown): Error;
/**
 * Log a warning message to the console. Put here to limit lint console errors
 * for the times we really do want to use console.log. Will also append a
 * p tag to a div#debug if it exists.
 *
 * @param   msg the message to log
 */
export declare function warn(msg: string): void;
/**
 * String representation of input. This is kind of dumb but makes
 *  flow happier.
 *
 * @param value any kind of thing that can be turned into a string
 * @returns a string
 */
export declare function stringify(value: unknown): string;
export declare function isoToDateTime(val: string): DateTime;
/**
 * Create a luxon Interval from a start and end.
 *
 * @param  start         start of the interval as iso string or DateTime
 * @param  end         end of the interval as string or DateTime
 * @returns          the interval
 */
export declare function startEnd(start: string | DateTime, end: string | DateTime): Interval;
/**
 * Create a luxon Interval from a start and a duration. If the duration is negative, the
 * start time will become the end time. This differs from luxon Interval.after which
 * will return an invalid Interval instead.
 *
 * @param  start         start of the interval as iso string or DateTime
 * @param  duration      duration of the interval as iso string, number of seconds, or Duration
 * @returns          the interval
 */
export declare function startDuration(start: string | DateTime, duration: string | Duration | number): Interval;
/**
 * Create a luxon Interval from a duration and a end. If the duration is negative, the
 * end time will become the start time. This differs from luxon Interval.before which
 * will return an invalid Interval instead.
 *
 * @param  duration      duration of the interval as iso string, number of seconds, or Duration
 * @param  end         end of the interval as string or DateTime
 * @returns          the interval
 */
export declare function durationEnd(duration: string | Duration | number, end: string | DateTime): Interval;
/**
 * Calculates offset of remote server versus local time. It is assumed that the
 * argument was acquired as close in time to calling this as possible.
 *
 * @param  serverTimeUTC now as reported by remote server
 * @returns offset in seconds to now on local machine
 */
export declare function calcClockOffset(serverTimeUTC: DateTime): number;
export declare const WAY_FUTURE: DateTime;
/**
 * converts the input value is a DateTime, throws Error if not
 * a string, Date or DateTime. Zero length string or "now" return
 * current time.
 *
 * @param d 'now', string time, Date, number of milliseconds since epoch, or DateTime
 * @returns DateTime created from argument
 */
export declare function checkStringOrDate(d: string | Date | DateTime): DateTime;
/**
 * Converts name and value into a html query parameter, with appending ampersand.
 *
 * @param   name parameter name
 * @param   val  parameter value
 * @returns      formated query parameter
 */
export declare function makeParam(name: string, val: unknown): string;
/**
 * Converts name and value into a parameter line, with appending newline,
 * for including in POST body.
 *
 * @param   name parameter name
 * @param   val  parameter value
 * @returns      formated query parameter
 */
export declare function makePostParam(name: string, val: unknown): string;
/**
 * converts to ISO8601 but removes the trailing Z as FDSN web services
 * do not allow that.
 *
 * @param  date DateTime to convert to string
 * @returns ISO8601 without timezone Z
 */
export declare function toIsoWoZ(date: DateTime): string;
/**
 * Extracts a valid starting DateTime from interval.
 * Throws Error if interval is not valid.
 * @param  interval              luxon Interval
 * @returns          start DateTime
 */
export declare function validStartTime(interval: Interval): DateTime;
/**
 * Extracts a valid ending DateTime from interval.
 * Throws Error if interval is not valid.
 * @param  interval              luxon Interval
 * @returns          end DateTime
 */
export declare function validEndTime(interval: Interval): DateTime;
/**
 * Converts a luxon DateTime to a Javascript Date, checking for null,
 * undefined and isValid first. Throws Error in that case.
 *
 * @param  d  luxon DateTime
 * @returns   Javascript Date
 */
export declare function toJSDate(d: DateTime | null | undefined): Date;
/**
 * Check a Luxon DateTime, Interval or Duration for valid.
 * Throws Error if not. THis is to avoid globally setting
 * luxon's Settings.throwOnInvalid = true;
 * but still throw/catch on invalid dates.
 * @param  d                 luxon object
 * @param  msg               optional message to add to error
 * @returns  passed in object if valid
 */
export declare function checkLuxonValid(d: null | DateTime | Interval | Duration, msg?: string): DateTime<boolean> | Interval<boolean> | Duration<boolean>;
/**
 * @returns the protocol, http: or https: for the document if possible.
 * Note this includes the colon.
 */
export declare function checkProtocol(): string;
export interface FetchInitObject {
    cache: string;
    redirect: string;
    mode: string;
    referrer: string;
    headers: Record<string, string>;
    signal?: AbortSignal;
}
/**
 * Create default fetch init object with the given mimeType. Sets
 * no-cache, follow redirects, cors mode, referrer as seisplotjs and
 * mimetype as a header. Note that redirect with POST may fail due to
 * POST being changed to GET on a 301. Fetching with POST may wish
 * to use redirect: "manual" to handle the 301 correctly by POSTing to
 * the new URL.
 *
 *
 * @param   mimeType requested mime type
 * @returns           object with fetch configuration parameters
 */
export declare function defaultFetchInitObj(mimeType?: string): RequestInit;
export declare function cloneFetchInitObj(fetchInit: RequestInit): RequestInit;
export declare function errorFetch(_url: URL | RequestInfo, _init?: RequestInit | undefined): Promise<Response>;
export declare let default_fetch: null | ((url: URL | RequestInfo, init?: RequestInit | undefined) => Promise<Response>);
export declare function setDefaultFetch(fetcher: (url: URL | RequestInfo, init?: RequestInit | undefined) => Promise<Response>): void;
export declare function getFetch(): (url: URL | RequestInfo, init?: RequestInit | undefined) => Promise<Response>;
/**
 * Does a fetch, but times out if it takes too long.
 *
 * @param   url        url to retrieve
 * @param   fetchInit  fetch configuration, initialization
 * @param   timeoutSec maximum time to wait in seconds
 * @param   fetcher optional fetch to use instead of global fetch
 * @returns             promise to the result
 * @throws Error if time out or other failure
 */
export declare function doFetchWithTimeout(url: string | URL, fetchInit?: RequestInit, timeoutSec?: number, fetcher?: (url: URL | RequestInfo, init?: RequestInit | undefined) => Promise<Response>): Promise<Response>;
/**
 * Allows downloading of in memory data, as ArrayBuffer, to file as if
 * the user clicked a download link.
 *
 * @param  data               ArrayBuffer to download
 * @param  filename          default filename
 * @param  mimeType      mimeType, default application/octet-stream
 */
export declare function downloadBlobAsFile(data: ArrayBuffer, filename: string, mimeType?: string): void;
/**
 * Recursively calculates the mean of a slice of an array. This helps with
 * very long seismograms to equally weight each sample point without overflowing.
 *
 * @param   dataSlice slice of a seismogram
 * @param   totalPts  number of points in the original seismogram
 * @returns            sum of slice data points divided by totalPts
 */
export declare function meanOfSlice(dataSlice: Int32Array | Float32Array | Float64Array, totalPts: number): number;
export declare const SVG_NS = "http://www.w3.org/2000/svg";
export declare const XHTML_NS = "http://www.w3.org/1999/xhtml";
export declare function createSVGElement(name: string): SVGElement;
export declare function updateVersionText(selector?: string): void;