Backups all images on forum topics, blogs and all images on anime/manga lists CSS styles.
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// ==UserScript==
// @name MAL Images Backup
// @namespace MALImgsBackup
// @description Backups all images on forum topics, blogs and all images on anime/manga lists CSS styles.
// @version 3
// @match https://myanimelist.net/animelist/*
// @match https://myanimelist.net/mangalist/*
// @match https://myanimelist.net/blog/*&cat=*
// @match https://myanimelist.net/forum/?topicid=*
// @icon https://t3.gstatic.com/faviconV2?client=SOCIAL&type=FAVICON&fallback_opts=TYPE,SIZE,URL&url=http://myanimelist.net&size=64
// @connect i.imgur.com
// @connect cdn.myanimelist.net
// @connect image.myanimelist.net
// @grant GM_registerMenuCommand
// @grant GM.xmlHttpRequest
// @run-at document-end
// ==/UserScript==
GM_registerMenuCommand("Backup HTML/CSS", Backup); //Adds an option to the menu
async function Backup() { //Creates a new Backup function
const imagePromises = []; //Creates a new array
if (location.pathname.match('list') !== null) //If the user is on a manga/anime list
{ //Starts the if condition
document.querySelector("style:nth-child(2), #custom-css").innerText.match(/http.+?(?=(?:"|'|`)?\))/gm).forEach((URL) => { //For each image URL in the CSS code
const promise = new Promise((resolve) => { //Convert URL to DataURI using a Promise
GM.xmlHttpRequest({ //Starts the xmlHttpRequest
method: "GET",
url: URL,
responseType: "blob",
onload: async (response) => {
const reader = new FileReader();
reader.onload = () => resolve(reader.result);
reader.readAsDataURL(response.response);
} //Finishes the onload
}); //Finishes the xmlHttpRequest
}); //Finishes the promise const
imagePromises.push(promise); //Add the promise to the array
promise.then((dataURI) => { //After the promise resolves, replace URL with DataURI in the CSS code
document.querySelector("style:nth-child(2), #custom-css").innerText = document.querySelector("style:nth-child(2), #custom-css").innerText.replace(URL, dataURI);
}); //Finishes the dataURI const
}); //Finishes the forEach loop
await Promise.all(imagePromises); //Wait for all image URLs to be fetched and their corresponding data URIs to be generated
if (document.querySelector("#advanced-options") !== null && document.querySelector("#custom-css").innerText !== '\n \n ') //If the user is on a modern list style and has a custom css
{ //Starts the if condition
document.body.insertAdjacentHTML('afterbegin', `<a id='dwnldLnk' download="${location.pathname.split('/')[2] + ' Modern Custom Style'}.css" href="data:text/css;charset=utf-8,${encodeURIComponent(document.querySelector("#custom-css").innerText)}"></a>`); //Generate the download button
} //Finishes the if condition
if (document.querySelector("#advanced-options") !== null) //If the user is on a modern list style and has no custom css
{ //Starts the if condition
document.body.insertAdjacentHTML('afterbegin', `<a id='dwnldLnk' download="${location.pathname.split('/')[2] + ' Modern Style'}.css" href="data:text/css;charset=utf-8,${encodeURIComponent(document.querySelector("style:nth-child(2)").innerText)}"></a>`); //Generate the download button
document.getElementById('dwnldLnk').click(); //Download the css
} //Finishes the if condition
else //If the user is on a classic list style
{ //Starts the else condition
document.body.insertAdjacentHTML('afterbegin', `<a id='dwnldLnk' download="${location.pathname.split('/')[2] + ' Classic Style'}.css" href="data:text/css;charset=utf-8,${encodeURIComponent(document.querySelector("style:nth-child(2)").innerText)}"></a>`); //Generate the download button
document.getElementById('dwnldLnk').click(); //Download the css
} //Finishes the else condition
} //Finishes the if condition
else //If the user is on a forum or blog page
{ //Starts the else condition
document.querySelectorAll(".message-text > img, .userimg").forEach(function(URL) { //ForEach image URL on the page
const imagePromise = new Promise((resolve) => GM.xmlHttpRequest({ //Starts the xmlHttpRequest
method: "GET",
url: URL.src,
responseType: "blob",
onload: async (response) => {
const dataURI = await new Promise((resolve) => {
const reader = new FileReader();
reader.onload = () => resolve(reader.result);
reader.readAsDataURL(response.response);
});
dataURI !== 'data:' ? URL.src = dataURI : ''; //Change the url link with the data URI
resolve(); //Resolve the promise once the data URI is generated
} //Finishes the onload
})); //Finishes the xmlHttpRequest
imagePromises.push(imagePromise); //Add the promise to the array
}); //Finishes the forEach loop
await Promise.all(imagePromises); //Wait for all image URLs to be fetched and their corresponding data URIs to be generated
document.body.insertAdjacentHTML('afterbegin', `<a id='dwnldLnk' download="https myanimelist.net ${location.href.split(/t\//)[1].replaceAll(/[/?]/gm, ' ').replaceAll(/ /gm, ' ')}.html" href="data:text/html;charset=utf-8,${encodeURIComponent(document.documentElement.outerHTML)}"></a>`); //Generate the download button
document.getElementById('dwnldLnk').click(); //Download the website html
} //Finishes the else condition
}; //Finishes the Backup function