Hunt for Texts

// ==UserScript==
// @name           Hunt for texts
// @namespace      typeracer
// @include        https://play.typeracer.com/*
// @require        http://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js
// ==/UserScript==

var orig_title = document.title;

var needles = [
    "submarines",
];
var keep_going = 0;

function join_practice() {
    document.title = orig_title;

    var link = $("a:contains('Practice')");

    var evt = document.createEvent("HTMLEvents");
    evt.initEvent("click", true, true);
    link[0].dispatchEvent(evt);

    if (keep_going) setTimeout(search, 750);
}

function search() {
    var content = document.body.textContent || document.body.innerText;

    var found = 0;
    for (var i = 0; i < needles.length; i++) {
        if (content.indexOf(needles[i]) !== -1) {
            document.title = 'Text found!';
            found = 1;
            break;
        }
    }

    if (!found) {
        if (keep_going) leave_practice();
    }
    else {
        keep_going = 0;
    }
}

function leave_practice() {
    var link = $("a:contains('leave practice')");

    var evt = document.createEvent("HTMLEvents");
    evt.initEvent("click", true, true);
    link[0].dispatchEvent(evt);

    if (keep_going) setTimeout(join_practice, 500);
}

function hunt_keyup(e) {
    if (e.ctrlKey && e.altKey && e.keyCode == 65) {
        keep_going = 1;
        join_practice();
    }
    if (e.ctrlKey && e.altKey && e.keyCode == 66) {
        keep_going = 0;
    }
}

document.addEventListener("keyup", hunt_keyup, false);