Attempt to block youtube ads, English NZ

block-youtube-ads.js

// https://www.youtube.com/watch?v=LcmT38ZPTjg
var _STAGE_ = 0;
var _FAIL_COUNT_ = 0;
var __INTERVAL__ = setInterval(function() {
    let iframe = null;
    let blockAdBtn = null;
    let continueElement = null;
    let closeBtn = null;
    let infoBtn = null;
    if (_STAGE_ > 0) {
      console.log(`Stage: ${_STAGE_} Fail Counter: ${_FAIL_COUNT_}`);
    }
    if (_STAGE_ > 0 && _FAIL_COUNT_ > 50) {
        _STAGE_ --;
        _FAIL_COUNT_ = 0;
        console.log('Stepping back due to fail count being too high.')
    }
    switch (_STAGE_) {
        case 0:
            //            var infoBtn = document.getElementById('ad-info-hover-text-button:h');
            let infoBtns = document.querySelectorAll('button[aria-label="My Ad Center"]');
            if (infoBtns.length > 0) {
                infoBtn = infoBtns[0];
            }
            if (infoBtn == null || infoBtn.checkVisibility() === false) {
                _FAIL_COUNT_++;
                return;
            }

            console.log('Info Button Found');
            infoBtn.click();
            _STAGE_ = 1;
            _FAIL_COUNT_ = 0;
            break;
        case 1:
        // Go into iFrame?
        // iframe #iframe classes style-scope yt-about-this-ad-renderer
            // TODO: Other languages, other selectors.
            blockAdBtn = null;
            iframe = document.getElementById('iframe');
            if (iframe) {
                blockAdBtn = iframe.contentWindow.document.querySelector('gm3-text-button[label="Block ad"]');
            }
            if (blockAdBtn == null || blockAdBtn.checkVisibility() === false) {
                _FAIL_COUNT_++;
                return;
            }
            console.log('Found Block Ad Btn');
            blockAdBtn.click();
            _STAGE_ = 2;
            _FAIL_COUNT_ = 0;
            break;
        case 2:
            iframe = document.getElementById('iframe');
            allFound = null;
            if (iframe) {
                allFound = iframe.contentWindow.document.querySelectorAll('div > span > span');
            }
            if (allFound === null || allFound.length === 0) {
                _FAIL_COUNT_++;
                return;
            }

            continueElement = null;

            for (const element of allFound) {
                if (element.textContent.includes('CONTINUE') && element.checkVisibility() === true) {
                    continueElement = element;
                    break; // Exit the loop once you've found the element
                }
            }

            if (continueElement) {
                console.log('continue element found');
                // Do something with the "CONTINUE" element, for example, clicking it:
                continueElement.parentElement.click();
                _STAGE_ = 3;
                _FAIL_COUNT_ = 0;
                return;
            } else {
                console.log('No element with the text "CONTINUE" found.');
                _FAIL_COUNT_++;
            }
            break;
        case 3:
            console.log('Looking for Close Dialog');
            iframe = document.getElementById('iframe');
            closeBtn = null;
            if (iframe) {
                closeBtn = iframe.contentWindow.document.querySelector('button[aria-label="Close"]');
            }
            if (closeBtn == null || closeBtn.checkVisibility() === false) {
                _FAIL_COUNT_++;
                return;
            }
            console.log('Closing My Ad Center dialog presumably.');
            closeBtn.click();
            _STAGE_ = 0;
            _FAIL_COUNT_ = 0;
            break;
    }
}, 300);
// I found 300ms to be ok, but want to make a further improvement where it runs faster for other steps but lazy.

function stopBlockTest() {
    clearInterval(__INTERVAL__);
}