PN Script DL Btn

Adds a download btn to download all availble Pn whenever possible
Version vom 23.06.2021. Aktuellste Version
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// ==UserScript==
// @name         PN Script DL Btn
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Adds a download btn to download all availble Pn whenever possible
// @author       DA25
// @match        *://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  document.addEventListener("DOMContentLoaded", function(){
    if (window.flashvars) {
      console.log("Found");
      console.log(window.flashvars);
  
      function fixVidUrl(vidUrl) {
        if (!!vidUrl) {
          return vidUrl.replace("function/0/", "");
        } else {
          return undefined
        }
      }
      function getDefaultVidUrl() {
        return fixVidUrl(window.flashvars["video_url"]);
      }
      function getDefaultVidText() {
        return window.flashvars["video_url_text"];
      }
      function getVidAltUrl(num) {
        let urlNumStr = "";
        if (num === 1) {
          urlNumStr = `video_alt_url`;
        } else {
          urlNumStr = `video_alt_url${num}`;
        }
        return fixVidUrl(window.flashvars[urlNumStr]);
      }
      function getVidAltText(num) {
        let textNumStr = "";
        if (num === 1) {
          textNumStr = `video_alt_url_text`;
        } else {
          textNumStr = `video_alt_url${num}_text`;
        }
        return window.flashvars[textNumStr];
      }
      function createDownloadLinkEle(altUrl, altText) {
        let altAnchorEle = document.createElement("a");
        altAnchorEle.classList.add("dropdown-item", "btn-sm");
        altAnchorEle.setAttribute("href", altUrl);
        altAnchorEle.innerText = altText;
        return altAnchorEle;
      }
      function createdDownloadEle() {
        let dropdownWrapper = document.createElement("div");
        dropdownWrapper.classList.add("dropdown");
  
        let downloadBtn = document.createElement("button");
        downloadBtn.classList.add("btn", "btn-dark", "btn-sm", "dropdown-toggle");
        downloadBtn.setAttribute("type", "button");
        downloadBtn.setAttribute("data-bs-toggle", "dropdown");
        downloadBtn.innerText = "DA25-Download";
  
        dropdownWrapper.append(downloadBtn);
  
        let btnList = document.createElement("ul");
        btnList.classList.add("dropdown-menu", "btn-sm");
  
        dropdownWrapper.append(btnList);
  
        return dropdownWrapper;
      }
      function appendDownloadLinkEle(downloadEle, linkEle) {
        let downloadBtnList = downloadEle.querySelector("ul.dropdown-menu");
        let listItem = document.createElement("li");
        listItem.append(linkEle);
        downloadBtnList.append(listItem);
      }
  
      function addBootstrap() {
        let head = document.getElementsByTagName("head")[0];
        let bootstrapCssScriptEle = document.createElement("link");
        bootstrapCssScriptEle.setAttribute("href", "https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css");
        bootstrapCssScriptEle.setAttribute("rel", "stylesheet");
        bootstrapCssScriptEle.setAttribute("integrity", "sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC");
        bootstrapCssScriptEle.setAttribute("crossorigin", "anonymous");
        head.insertAdjacentElement("beforeend", bootstrapCssScriptEle);
  
        let body = document.getElementsByTagName("body")[0];
        let bootstrapJsScriptEle = document.createElement("script");
        bootstrapJsScriptEle.setAttribute("src", "https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js");
        bootstrapJsScriptEle.setAttribute("integrity", "sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM");
        bootstrapJsScriptEle.setAttribute("crossorigin", "anonymous");
        body.insertAdjacentElement("beforeend", bootstrapJsScriptEle);
      }
  
      function initDownloadLink(downloadDropDownEle) {
        let listEle = document.createElement("li");
        listEle.append(downloadDropDownEle);
  
        let menuList = document.querySelector(".tabs-menu > ul");
  
        if (!!menuList) {
          menuList.prepend(listEle);
          // addBootstrap();
        } else {
          alert("window.flashvars present but '.tabs-menu > ul' is not");
        }
      }
  
      try {
        let defaultVidUrl = getDefaultVidUrl();
        let defaultVidText = getDefaultVidText();
        let defaultDownloadEle = createdDownloadEle();
        appendDownloadLinkEle(defaultDownloadEle, createDownloadLinkEle(defaultVidUrl, defaultVidText));
  
        let count = 1;
        let vidAltUrl = getVidAltUrl(count);
        let vidAltText = getVidAltText(count);
        while (!!vidAltUrl) {
          appendDownloadLinkEle(defaultDownloadEle, createDownloadLinkEle(vidAltUrl, vidAltText));
          count = count + 1;
          vidAltUrl = getVidAltUrl(count);
          vidAltText = getVidAltText(count);
        }
  
        initDownloadLink(defaultDownloadEle);
      } catch (e) {
        alert(e);
      }
    } else {
      console.log("Not Found");
    }
  });
})();