[Script] Simple Queue Low Time Alert

Here's a dirty little script that runs on the queue and will make a magical sound when the shortest timer falls under a certain threshold (default: 10 minutes).

https://greasyfork.org/en/scripts/37877-simple-queue-low-time-alert

Code:

// ==UserScript==
// @name         Simple Queue Low Time Alert
// @version      1.1
// @description  Alert if time is running out on HITs
// @author       slothbear
// @icon         http://i.imgur.com/yptTSAh.gif
// @include      https://worker.mturk.com/tasks*

// @namespace https://greasyfork.org/users/64880
// ==/UserScript==


// This script watches the shortest timer in the queue
// and plays an audio alert if it falls under a certain
// number of minutes (default is 10).
//
// The script will reload the queue every 15 seconds while
// a timer is going off so it can reset and not be annoying.




//alert time in minutes
//set to 100 to test or debug
const WARNING_TIMER = 10;



function watchTimer(timer, audioElement) {
    var warningClock = 0;
    let originalTitle = document.title;

    setInterval(function(){
        let time = extractMinutesFromTime(timer.innerText);
        let visualTrigger = false;
        if (checkMinutesLeft(time)) {
            if (warningClock === 0) audioAlert(audioElement);
            if (warningClock === 14) window.location.reload();
            warningClock++;
            visualTrigger = true;
        } else {
            visualTrigger = false;
        }
        if (visualTrigger) visualAlert(warningClock, originalTitle);
    }, 1000);
}

function extractMinutesFromTime(time) {
    let length = time.length;
    let minutes;
    if (length > 5) minutes = 99; // this happens if over 1 hour left
    if (length === 5) minutes = time.substring(length-5,length-3);
    if (length < 5) minutes = time.substring(length-4,length-3);
    return minutes;
}

function visualAlert(count, originalTitle) {
    let firstRow = document.querySelector('li.table-row');
    if (count %2 === 0)    {
        document.title = "█████████████████████";
        firstRow.style.backgroundColor = "#D66462";
    } else {
        document.title = originalTitle;
        firstRow.style.backgroundColor = "#DCC784";
    }
}

function init_audio() {
    let audioElement = [];
    audioElement[0] = document.createElement('audio');
    audioElement[0].setAttribute('src', 'http://themushroomkingdom.net/sounds/wav/smb/smb_warning.wav');
    return audioElement;
}

function audioAlert(audioElement) {
    console.log("Tasks are about to expire. HURRY!");
    audioElement[0].play();
}

function grabFocus() {
    let quickFocus = window.open("https://www.chronicle.com/blogs/linguafranca/files/2017/11/Nothing-to-See-15a34a2fc727c8.jpg", "_blank");
    quickFocus.close();
}

function getTimer(pos) {
    return document.querySelectorAll('span.completion-timer')[pos];
}

function minutesToSeconds(minutes) {
    return minutes * 60;
}

function checkMinutesLeft(time) {
    return (time < WARNING_TIMER);
}



(function main() {

    //checks for a completion timer,
    //then stops if none found.
    let shortestTimer = getTimer(0);
    if (!shortestTimer) return false;

    //get the audio setup so the file is ready
    //and then start watching the shortest timer
    let audioElement = init_audio();
    watchTimer(shortestTimer, audioElement);

})();