// ==UserScript==
// @name         Patch When Available Library
// @namespace    hoehleg.userscripts.private
// @version      0.1
// @description  Calls a function (getExpectedFnc()) repeatedly until it gives an expected r###lt (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);
};