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Patch When Available Library

Calls a function (getExpectedFnc()) repeatedly until it gives an expected result (confirmIsAvailableFnc()). Forwards it to (doPatchFnc()).

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greatest.deepsurf.us/scripts/428034/941202/Patch%20When%20Available%20Library.js 

// ==UserScript==
// @name         Patch When Available Library
// @namespace    hoehleg.userscripts.private
// @version      0.1
// @description  Calls a function (getExpectedFnc()) repeatedly until it gives an expected result (confirmIsAvailableFnc()). Forwards it to (doPatchFnc()).
// @author       Gerrit Höhle
// @grant        none
// ==/UserScript==
 
/* jslint esnext: true */
const patchWhenAvailable = ({ getExpectedFnc, doPatchFnc, confirmIsAvailableFnc = null, timeOutRetryMillis = 200, maxPeriodTryMillis = 5000 }) => {
    const valueOrObject = getExpectedFnc();
    const isAvailable = confirmIsAvailableFnc ? confirmIsAvailableFnc(valueOrObject) : !!valueOrObject;
    
    if (!isAvailable) {
        if (timeOutRetryMillis <= maxPeriodTryMillis) {

            setTimeout(() => {
                maxPeriodTryMillis -= timeOutRetryMillis;
                patchWhenAvailable({ getExpectedFnc, doPatchFnc, confirmIsAvailableFnc, timeOutRetryMillis, maxPeriodTryMillis });

            }, timeOutRetryMillis);
        }

        return;
    }

    doPatchFnc(valueOrObject);
};