Spams in any SE or SO chatroom.

SE Chat Spammer

// ==UserScript==
// @name         SE Chat Spammer
// @namespace    http://chat.meta.stackexchange.com
// @version      1.0
// @description  Spam dem Boys!
// @author       Clemens Himmer
// @include      *://chat.meta.stackexchange.com/rooms/*
// @include      *://chat.stackoverflow.com/rooms*
// ==/UserScript==

(function() {
    'use strict';
    var fKey = fkey().fkey;
    var splitHref = location.href.split("rooms/");
    var messagePostURL = splitHref[0] + "chats/" + parseInt(splitHref[1])+"/messages/new";

    function spamMessage(textSpawner,iterationAmount){
        function sendMessage(initialCount, countLeft){
            if(countLeft === undefined){
                countLeft = initialCount-1;
            }
            var text = textSpawner(initialCount, countLeft);
            var r = new XMLHttpRequest();
            r.open("POST", messagePostURL, true);
            r.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
            r.onreadystatechange = function () {
                if (r.readyState != 4 ) return;
                if(countLeft > 0 || (countLeft === 0 && r.status !== 200)){
                    var checkString = "You can perform this action again in";
                    if(r.status !== 200){
                        var timeOutMs = 1000 * (parseInt(r.responseText.split(checkString)[1])+1);
                        setTimeout(
                            function(){
                                sendMessage(initialCount,countLeft);
                            },timeOutMs);
                    }
                    else{
                        sendMessage(initialCount,countLeft-1);
                    }
                }
            };
            r.send("fkey="+fKey+"&text="+encodeURIComponent(text));
        }
        sendMessage(iterationAmount);
    }
    var handleSpamSubmit = function() {
        var inputElement = document.getElementById("input");
        var inputText = inputElement.value;
        var numberElement = document.getElementById("spam-amount");
        var spamAmount = Number(numberElement.value);
        inputElement.value = "";
        numberElement.value = "";

        var textSpawner = function(initialCount, countLeft){
            return inputText.replace("currentAmount",initialCount-countLeft).replace("totalAmount",initialCount).replace("leftAmount",countLeft);
        };
        if(!isNaN(spamAmount) && spamAmount > 0){
            spamMessage(textSpawner,spamAmount);
            console.info("Started to spam message with "+spamAmount+" iterations");
        }
        else{
            throw new Error("You messed up the amount input, dude!");
        }
    };

    // Initiate spam UI
    function insertAfter(newNode, referenceNode) {
        referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
    }

    // Add CSS
    var sheet = (function() {
        var style = document.createElement("style");
        style.appendChild(document.createTextNode(""));
        document.head.appendChild(style);
        return style.sheet;
    })();
    var isSO = location.host.indexOf("stackoverflow") > -1;
    sheet.addRule("#spam-button", "border-bottom-left-radius: 0;border-top-left-radius: 0;", 0);
    sheet.addRule(".tooltip", "display:inline;", 0);
    sheet.addRule(".tooltip .tooltiptext", "display:none;width:auto;background-color:#000;color:#fff;text-align:center;border-radius:3px;padding:5px;position:absolute;z-index:1; margin-left: 10px; margin-top: 5px;font-size: 9px;line-height: 14px;height: 14px;", 0);
    sheet.addRule(".tooltip:hover .tooltiptext", "display:inline",0);
    sheet.addRule("#spam-amount", "margin-left: 5px;width: 30px;padding: 0;border: 0;" + (isSO? "border-radius: 10px 0 0 10px;height: 17px;": "border-radius: 3px 0 0 3px;box-shadow: 0px 2px 0 #086586;height: 21px;"),0);

    // Add HTML
    var input = document.createElement("input");
    input.id = "spam-amount";
    input.type= "number";
    var hackyButton = document.createElement("id");
    hackyButton.id = "spam-button";
    hackyButton.classList = "button";
    var buttonText = document.createTextNode("spam");
    hackyButton.appendChild(buttonText);
    var tooltip = document.createElement("div");
    tooltip.classList = "tooltip";
    var tooltipB = document.createElement("b");
    var boldText = document.createTextNode(" ?");
    tooltipB.appendChild(boldText);
    tooltip.appendChild(tooltipB);
    var span = document.createElement("span");
    span.classList = "tooltiptext";
    var spanText = document.createTextNode("currentAmount, totalAmount and leftAmount will be replaced accordingly.");
    span.appendChild(spanText);
    tooltip.appendChild(span);
    hackyButton.appendChild(tooltip);
    insertAfter(input,document.getElementById("sayit-button"));
    insertAfter(hackyButton,document.getElementById("spam-amount"));

    // Bind listeners
    document.getElementById("spam-button").addEventListener("click", handleSpamSubmit);
    document.getElementById("spam-amount").addEventListener("keypress", function(e) {
        if (e.keyCode === 13) {
            handleSpamSubmit();
        }
    });
})();