Roblox Signature

robloxsiggy.user.js

// ==UserScript==
// @name         Roblox Signature
// @namespace    http://ateesdalejr.tk/
// @version      1.0
// @description  Appends signature to my roblox forum posts.
// @author       Andrew T.
// @match        https://forum.roblox.com/Forum/*
// @grant        none
// ==/UserScript==

function changeSiggy() {
    var input=prompt("Please set a signature.");
    if (input !== null) {
        localStorage.setItem("SIGNATURE",input);
        SIGNATURE=localStorage.getItem("SIGNATURE");
    }
}
window.changeSiggy = changeSiggy;

(function() {
    'use strict';

    var SIGNATURE="";
    if (!("SIGNATURE" in localStorage)) {
        changeSiggy();
    } else {
        SIGNATURE=localStorage.getItem("SIGNATURE");
    }
    if (location.pathname == "/Forum/AddPost.aspx") {
        var submitButton=document.getElementById("ctl00_cphRoblox_Createeditpost1_PostForm_PostButton");
        var after=submitButton.onclick;
        submitButton.onclick=function() {
            document.getElementsByTagName("textarea")[0].value+="\n".repeat(8)+SIGNATURE;
            eval(after);
        };
    } else if (location.pathname == "/Forum/Default.aspx") {
        $("#forum-nav").append('<a class="menuTextLink" onclick="changeSiggy();">Change Signature</a>');
    }
})();