ebay-bid-sniper.user.js

// ==UserScript==
// @name         Ebay Motherufcker
// @namespace    https://gist.github.com/Eibwen/
// @version      0.5
// @description  Bid at the last moment
// @updateURL    https://gist.github.com/Eibwen/08fab2f3fe2f10ca25ae96433c7ecc9b/raw/ebay-bid-sniper.user.js
// @author       Greg Walker
// @match        https://www.ebay.com/itm/*
// @grant        none
// ==/UserScript==


const bidAtTimeMatch = [/*"7s", "6s",*/ "5s", "4s", "3s", "2s"]; // "9h 12m 45s"


var lastBidButtonState = {};
const watchForBidButton = () => {
    const buttonState = placeBidInOpenBidWindow(true);

    //Hard code these properties since there are so few right now
    if (lastBidButtonState === null
        || lastBidButtonState.bidButton !== buttonState.bidButton
        || lastBidButtonState.confirmButton !== buttonState.confirmButton
        || lastBidButtonState.mainBidButton !== buttonState.mainBidButton) {
        console.log('Button state changed!');
        console.log(buttonState);

        lastBidButtonState = buttonState;
    }
    else {
        //console.log('No change');
        //console.log(lastBidButtonState);
    }
}

(function() {
    'use strict';

    console.log('Creating observer');

    const textElement = document.getElementById('vi-cdown_timeLeft');
    const triggerElement = document.getElementById('vi-time-wrapperSection');
    console.log(textElement);

    if (triggerElement) {

        //MutationObserver = window.MutationObserver || window.WebKitMutationObserver;

        var observer = new MutationObserver(function(mutations, observer) {
            // fired when a mutation occurs

            var text = textElement.innerText.trim();
            //console.log('DEBUG', `'${text}'`, `'${bidAtTimeMatch}'`);
            console.log('mutation');
            if (bidAtTimeMatch.indexOf(text) >= 0) {
                console.log("OMG BID NOW");
                placeBidInOpenBidWindow();
            }
        });

        // define what element should be observed by the observer
        // and what types of mutations trigger the callback
        observer.observe(triggerElement, {
            subtree: true,
            attributes: true, // works at least once the text turns red
            //characterData: true,
            childList: true, // works on normal auction pages?
        });

        triggerElement.style = `background-color: limegreen;
    padding: 3px;
    border-radius: 8px;`;

        console.log('Created observer');


        console.log('Creating button searcher...');

        setInterval(watchForBidButton, 5000);

        console.log('Created button searcher');
    }
    else {
        console.log('INFO: Auction countdown not found... doing nothing');
    }

})();


let confirmButtonPushLoop = null;
const placeBidInOpenBidWindow = (onlyTest = false) => {
    //const bidTimer = document.getElementById('_counter_itemEndDate');

    //TODO add a test functionality? where it checks the values that I care about...
    //     or maybe tell the user to put a LOW value, and then test that it errors on that
    //     BUT does this make it easier to develop or just more work for no benefits?


    const output = {};


    //const bidAmountField = document.getElementById('MaxBidId');



    // This is the case of only clicking on the "Bid" button on the auction, then entering the value
    //   there shouldn't be a confirm stage, on this, but TODO TEST
    const bidPromptButton = document.querySelector('.app-bidlayer-bidsection-custombid > button');

    if (bidPromptButton) {
        output.bidButton = true;
        if (!onlyTest) {
            clearInterval(confirmButtonPushLoop);

            console.log('Found bid button, pressing now!');
            bidPromptButton.click();
        }
    }


    // This case is if you enter the value in the main page, then it just shows a confirm button
    const confirmButton = document.getElementById('confirm_button');

    if (confirmButton) {
        output.confirmButton = true;
        if (!onlyTest) {
            clearInterval(confirmButtonPushLoop);

            console.log('Found confirm button, pressing now!');
            confirmButton.click();
        }
    }


    //TODO this version is trying to smiplify the state to what already existed
    //    BUT it kinda looks like it made it more complicated

    // Button on the main page, need to use this to avoid timeout issues
    const bidMainButton = document.getElementById('bidBtn_btn');

    if (bidMainButton) {
        const shouldOpenModal = !onlyTest
                                && !confirmButtonPushLoop
                                && !output.confirmButton
                                && !output.bidButton;

        //console.log(`shouldOpenModal = ${!onlyTest} && ${!confirmButtonPushLoop} && ${!output.confirmButton} && ${!output.bidButton}`);

        output.mainBidButton = true;
        //output.mainButtonVisible = isVisible(bidMainButton);
        if (shouldOpenModal) {
            console.log('Opening new bid prompt window...');
            bidMainButton.click();

            // wait for a time period, then push confirm
            console.log('Waiting time to click confirm button...');
            confirmButtonPushLoop = setInterval(() => {
                console.log('Confirm push loop');
                placeBidInOpenBidWindow();
            }, 200);
        }
    }


    return output;
};



//// https://stackoverflow.com/a/33456469/356218
//function isVisible(elem) {
//    return !!( elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length );
//}