UTK CS Discord Mass Mail Script

canvas_mail_script.js

// Your browser must support ES6 async / await, Promises, and Template Strings for this to work.
// Do not remove the sleeps to make it faster. They are there to allow time for the Ajax calls that Canvas makes to process.
// If you are on a slow connection, you might need to increase the length of the sleep calls.
// I've also made it up to you to click the send button. Be sure to check that you pasted your invite url correctly.
// To run this:
//   * Go to the page on Canvas where you can see your messages from the class you want to send the invite to.
//   * Open your browser's console using F12 or by right clicking and then selecting "Inspect Element".
//   * Paste the below code into your console window and hit enter.
//   * Then enter add_students("INSERT_INVITE_URL_HERE"); into your console window and hit enter.
//   * The script will run and then all you have to do is proofread and hit send!

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

async function add_students(discord_invite_url) {
    document.getElementById('compose-btn').click();

    document.getElementById('compose-message-subject').value = "Join the UTK CS/CE Student Discord Server!"

    document.getElementById("recipient-search-btn").click();

    await sleep(500);

    var clickEvent = document.createEvent('MouseEvents');
    clickEvent.initEvent("mousedown", true, true);
    document.querySelector('li[aria-label="Students"]').dispatchEvent(clickEvent);

    await sleep(500);

    var student_list = document.getElementsByClassName("message-header")[0].getElementsByClassName("ac-result-list collectionViewItems")[0].children;
    for (var i = 1; i < student_list.length; i++) {
        var student_click_event = document.createEvent("MouseEvents");
        student_click_event.initEvent("mousedown", true, true);
        student_list[i].dispatchEvent(student_click_event);

        document.getElementById("recipient-search-btn").click();
        await sleep(500);
        document.querySelector('li[aria-label="Students"]').dispatchEvent(clickEvent);
        await sleep(500);
    }

    document.getElementById('bulk_message').click();
    document.getElementsByClassName('compose_form')[0].getElementsByClassName('message-body')[0].children[0].value = `Go to this URL to join: ${discord_invite_url} \n 
    WHY YOU SHOULD USE DISCORD INSTEAD!
    ===================================
    
     * Class Channels! Find groupmates in other CS/CE classes easily!
     * Find TAs, get help from upperclass students, and chat about special other topics like Linux and gaming!
     * Code highlighting! Color-format and block-paste code in easy-to-read formats!
     * Web, desktop, and mobile applications available!
     * Gain points and XP for being active and helping your classmates!
     * Use custom emojis and react to other messages with up to 20 emotes at once!
     * Find students who have already taken the CS classes you're looking for, and get recommendations and personal experience from other members!
     * Post your personal CS projects and find other people with similar interests!`;
}