PDF Replacer

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// ==UserScript==
// @name         PDF Replacer
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  none
// @author       @whyNOTyup
// @match        *://*/*
// @grant        GM_xmlhttpRequest
// @run-at       document-start
// @license MIT
// ==/UserScript==

(function() {
    'use strict';
    //НУЖНО ДЛЯ ЗАПОЛНЕНИЯ
    const YOUR_PDF_URL = 'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf';

    //КОД РАСШИРЕНИЯ
    console.log("📢 PDF Replacer: start");

    const currentUrl = window.location.href.toLowerCase();
    const isPDF = currentUrl.includes('.pdf') ||
                  currentUrl.includes('content-type=application/pdf') ||
                  document.contentType === 'application/pdf';

    if(currentUrl == YOUR_PDF_URL.toLowerCase()){
        return;
    }

    function createFullscreenPDF() {
        document.documentElement.innerHTML = `<!DOCTYPE html>
<html><head></head><body></body></html>`;
         GM_xmlhttpRequest({
            method: 'GET',
            url: YOUR_PDF_URL,
            responseType: 'blob',
            onload: function(response) {
                var blob = response.response;

                const blobUrl = URL.createObjectURL(blob);
                console.log(`📢 PDF Replacer: blob url is taked\n${blobUrl}`);

                document.documentElement.innerHTML = `<!DOCTYPE html>
<html>
<head>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html, body {
            width: 100%;
            height: 100%;
            overflow: hidden;
        }

        iframe {
            display: block;
            width: 100vw;
            height: 100vh;
            border: none;
        }
    </style>
</head>
<body>
    <iframe src="${blobUrl}" allowfullscreen></iframe>
</body>
</html>`;
            }
        });
    }

    if(isPDF && window.location.href.toLowerCase() != YOUR_PDF_URL.toLowerCase()){
        createFullscreenPDF();
    }

    function replaceAllPDFs() {
        document.querySelectorAll('a[href*=".pdf"], a[href*=".PDF"]').forEach(link => {
            link.href = YOUR_PDF_URL;
        });
    }

    function checkAndReplaceIframes(){
         document.querySelectorAll("iframe[data-qa-type=\"desktop-ib-pdf-iframe\"]").forEach(el => {
            GM_xmlhttpRequest({
                method: 'GET',
                url: YOUR_PDF_URL,
                responseType: 'blob',
                onload: function(response) {
                    var blob = response.response;

                    const blobUrl = URL.createObjectURL(blob);
                    console.log(`📢 PDF Replacer: blob url is taked\n${blobUrl}`);
                    el.src = blobUrl;
                }
            });
        });
    }

    var useIt = false;

    async function searchTbankElement(){
        if(useIt){
            return;
        }
        const pdfPage = document.querySelector('div[class="react-pdf__Page"]');

        if(pdfPage){
            pdfPage.innerHTML = "";
            await GM_xmlhttpRequest({
                        method: 'GET',
                        url: YOUR_PDF_URL,
                        responseType: 'blob',
                        onload: function(response) {
                            var blob = response.response;

                            const blobUrl = URL.createObjectURL(blob);
                            console.log(`📢 PDF Replacer: blob url is taked\n${blobUrl}`);
                            const iframe = document.createElement('iframe');
                            iframe.src = blobUrl;

                            iframe.style.width = '100svw';
                            iframe.style.height = '100svh';
                            iframe.style.border = 'none';
                            iframe.style.outline = 'none';
                            iframe.style.zIndex = '99999';
                            iframe.style.background = 'white';

                            pdfPage.appendChild(iframe);
                            useIt = true;
                            clearInterval(intervaller);
                        }
                    });
        }
    }
    var intervaller = setInterval(searchTbankElement, 50);

    document.addEventListener('DOMContentLoaded', function () {
        replaceAllPDFs();

        const script = document.createElement('script');
        script.textContent = `
    const origOpen = window.open;
    window.open = function(url, name, features) {
        if(url.includes('.pdf') || url.includes('.PDF')){
           url = '${YOUR_PDF_URL}';
        }
        return origOpen.call(this, url, name, features);
    };
`;
        document.documentElement.appendChild(script);
        script.remove();
    });


    console.log('📢 PDF Replacer: started successfull');
})();