Neopets - Coconut Shy Auto-Player

// ==UserScript==
// @name          Neopets - Coconut Shy Auto-Player
// @author        none
// @description   Automatically plays 20 rounds Coconut Shy.
// @grant         GM.xmlHttpRequest
// @grant         GM_xmlhttpRequest
// @match         https://www.neopets.com/halloween/coconutshy.phtml
// @namespace     you
// @version       1.0.0
// @downloadURL  https://www.scriptneo.com/scripts/download.php?id=31
// @updateURL    https://www.scriptneo.com/scripts/download.php?id=31
// ==/UserScript==

(function() {
    function numberWithCommas(number) {
        return number.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    }

    function getItem(key, defaultValue) {
        var value = localStorage.getItem(key);
        if (value != null) {
            if (typeof value === "string") {
                try {
                    return JSON.parse(value);
                } catch (error) {}
            }
            return value;
        }
        return defaultValue;
    }

    function parseUrl(url) {
        var parsedUrl = {
            href: "",
            name: "",
            parameters: {}
        };

        if (url) {
            var queryString;
            if (typeof url === "string") {
                queryString = url;
                parsedUrl.href = url;
            } else {
                if (url.pathname) parsedUrl.name = url.pathname.match(/\/(.*)$/)[1].toLowerCase();
                queryString = url.search;
                parsedUrl.href = url.href;
            }
            for (var match, regex = /([^\&\=\?]+)\=([^\&]*)/g; match = regex.exec(queryString);) {
                parsedUrl.parameters[match[1]] = match[2];
            }
        }
        return parsedUrl;
    }

    function setItem(key, value) {
        if (value == null || value === undefined) {
            localStorage.removeItem(key);
        } else {
            if (typeof value !== "number" && typeof value !== "string") {
                value = JSON.stringify(value);
            }
            localStorage.setItem(key, value);
        }
    }

    if (typeof $ === "undefined") $ = unsafeWindow.$;
    if (typeof GM_xmlhttpRequest === "undefined") GM_xmlhttpRequest = GM.xmlHttpRequest;

    var swfObjectMatch = ($(".content script:contains(SWFObject):first").html() || "").match(/swfobject\(['"]([^\?]*)/i);
    $(".content img[src*='/halloween/coconutshy']").after('<table cellpadding="0" cellspacing="0" id="coconutShy" style="margin: 0 auto; text-align: center;"><tr><td style="width: 500px;"><br><b>-Coconut Shy Auto-Player-</b></td></tr><tr><td><br><br><table cellpadding="0" cellspacing="0" style="margin: 0 auto;"><tr><td><b>Auto-start:</b></td><td style="padding-left: 16px;"><input id="coconutShyAutoStart" style="margin: 0;" type="checkbox"></td></tr></table><br></td></tr><tr><td><br><input id="coconutShyStartStop" type="button"><br><br><br></td></tr><tr><td><h2 style="margin-bottom: 32px;"></h2><b>-Prizes-</b><br><br><div style="height: 500px; overflow-x: auto; width: 500px;"><table style="margin: 0 auto; text-align: center;"></table></div><br><br></td></tr></table>').nextAll(":not(center, " + (swfObjectMatch ? "" : "p, ") + "table)").remove();

    var autoStart = getItem("coconutShy.autoStart") || false;
    var coconutShyAutoStartCheckbox = $("#coconutShyAutoStart").prop("checked", autoStart);
    var throwCountDisplay = $("#coconutShy > tbody > tr:nth-child(2)");
    var isAutoPlaying = autoStart;
    var prizeDisplayTable = $("#coconutShy > tbody > tr:nth-child(4) > td > div > table");
    var prizeDisplayContainer = $("#coconutShy > tbody > tr:nth-child(4)").hide();
    var startStopButton = $("#coconutShyStartStop");
    var statusDisplay = $("#coconutShy > tbody > tr:nth-child(4) > td > h2");
    var throwTimeout;

    function playCoconutShy() {
        var throwNumber = 0;
        var delayMin = 1000;
        var delayMax = 3000;

        function handleThrow(response) {
            if (response && response.responseText) {
                var parsedResponse = parseUrl(response.responseText).parameters;
                throwNumber++;
                if (parsedResponse.success = parseInt(parsedResponse.success)) {
                    var displayContent = [numberWithCommas(parseInt(parsedResponse.points.replace(/\,/g, ""))) + " NP"];
                    if (parsedResponse.success == 4) {
                        function fetchPrizeInfo(response) {
                            if (response && response.responseText) {
                                var prizeMatch = response.responseText.match(/<br[^>]*>\s*<b[^>]*>\s*(.*?)\s*<\/b>/i);
                                if (prizeMatch) displayContent.push(prizeMatch[1]);
                            }
                            if ((parsedResponse.error || "").match(/avatar/i)) displayContent.push("Avatar");
                            prizeDisplayTable[0].insertRow(0).innerHTML = "<td>" + throwNumber + ". " + displayContent.join(", ") + "</td>";
                            if (isAutoPlaying) {
                                statusDisplay.html("Waiting for throw " + (throwNumber + 1) + " of 20...");
                                throwTimeout = setTimeout(throwCoconut, Math.round(Math.random() * (delayMax - delayMin)) + delayMin);
                            }
                        }
                        GM_xmlhttpRequest({
                            headers: {
                                Referer: swfObjectMatch[1]
                            },
                            method: "GET",
                            onabort: fetchPrizeInfo,
                            onerror: fetchPrizeInfo,
                            onload: fetchPrizeInfo,
                            ontimeout: fetchPrizeInfo,
                            timeout: 10000,
                            url: location.origin + "/halloween/coconutshy_item.phtml?obj_id=" + parsedResponse.prize_id
                        });
                    } else {
                        prizeDisplayTable[0].insertRow(0).innerHTML = "<td>" + throwNumber + ". " + displayContent.join(", ") + "</td>";
                        statusDisplay.html("Waiting for throw " + (throwNumber + 1) + " of 20...");
                        throwTimeout = setTimeout(throwCoconut, Math.round(Math.random() * (delayMax - delayMin)) + delayMin);
                    }
                } else {
                    handleThrow(); // Retry
                }
            } else {
                statusDisplay.html("Error throwing! Waiting for throw " + (throwNumber + 1) + " of 20...");
                throwTimeout = setTimeout(throwCoconut, Math.round(Math.random() * (delayMax - delayMin)) + delayMin);
            }
        }

        function throwCoconut() {
            GM_xmlhttpRequest({
                headers: {
                    Referer: swfObjectMatch[1]
                },
                method: "GET",
                onabort: handleThrow,
                onerror: handleThrow,
                onload: handleThrow,
                ontimeout: handleThrow,
                timeout: 10000,
                url: location.origin + "/halloween/process_cocoshy.phtml?coconut=3&r=" + Math.round(Math.random() * 9999999)
            });
            statusDisplay.html("Throwing " + (throwNumber + 1) + " of 20");
        }

        statusDisplay.html("Initializing...");
        throwCoconut();
    }

    function stopPlaying() {
        isAutoPlaying = false;
        if (throwTimeout) {
            clearTimeout(throwTimeout);
            throwTimeout = null;
        }
        throwCountDisplay.show();
        startStopButton.val("Start");
        statusDisplay.hide().html("");
    }

    if (!swfObjectMatch) startStopButton.next("br").remove();

    document.getElementById(coconutShyAutoStartCheckbox.attr("id")).addEventListener("change", function() {
        setItem("coconutShy.autoStart", (autoStart = coconutShyAutoStartCheckbox.prop("checked")) || null);
    });

    document.getElementById(startStopButton.attr("id")).addEventListener("click", function() {
        if ((isAutoPlaying = !isAutoPlaying) && swfObjectMatch) {
            throwCountDisplay.hide();
            prizeDisplayTable.html("");
            prizeDisplayContainer.show();
            startStopButton.val("Stop");
            statusDisplay.show();
            playCoconutShy();
        } else {
            stopPlaying();
        }
    });

    if (isAutoPlaying && swfObjectMatch) {
        throwCountDisplay.hide();
        prizeDisplayContainer.show();
        startStopButton.val("Stop");
        playCoconutShy();
    } else {
        startStopButton.val("Start");
    }
})();