Twitter Click'n'Save Sa

Add buttons to download images and videos in Twitter, also does some other enhancements.

作者のサイトでサポートを受ける。または、このスクリプトの質問や評価の投稿はこちら通報はこちらへお寄せください。
// ==UserScript==
// @name        Twitter Click'n'Save Sa
// @version     7.8.2024
// @namespace   gh.alttiri
// @description Add buttons to download images and videos in Twitter, also does some other enhancements.
// @match       https://twitter.com/*
// @match       https://x.com/*
// @homepageURL https://github.com/AlttiRi/twitter-click-and-save
// @supportURL  https://github.com/AlttiRi/twitter-click-and-save/issues
// @license     GPL-3.0
// @grant       GM_registerMenuCommand
// ==/UserScript==
// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------

const settings = loadSettings();
const filenameGlobal = `twitter @{author}, name. 【{authorName}】, twitter id. {status-id}, mediaName. {media-name}.{extension}`;

// ---------------------------------------------------------------------------------------------------------------------
const sitename = location.hostname.replace(".com", ""); // "twitter" | "x"
// ---------------------------------------------------------------------------------------------------------------------
// --- "Imports" --- //
const {StorageNames, StorageNamesOld} = getStorageNames();

const {verbose, debugPopup} = getDebugSettings(); // --- For debug --- //


const {
    sleep, fetchResource, downloadBlob,
    addCSS,
    getCookie,
    throttle,
    xpath, xpathAll,
    responseProgressProxy,
    dateToDayDateString,
    toLineJSON,
    isFirefox,
    getBrowserName,
    removeSearchParams,
} = getUtils({verbose});

const LS = hoistLS({verbose});

const API = hoistAPI();
const Tweet = hoistTweet();
const Features = hoistFeatures();
const I18N = getLanguageConstants();

// ---------------------------------------------------------------------------------------------------------------------

function getStorageNames() {
    // New LocalStorage key names 2023.07.05
    const StorageNames = {
        settings:                "ujs-twitter-click-n-save-settings",
        settingsImageHistoryBy:  "ujs-twitter-click-n-save-settings-image-history-by",
        downloadedImageNames:    "ujs-twitter-click-n-save-downloaded-image-names",
        downloadedImageTweetIds: "ujs-twitter-click-n-save-downloaded-image-tweet-ids",
        downloadedVideoTweetIds: "ujs-twitter-click-n-save-downloaded-video-tweet-ids",

        migrated:                "ujs-twitter-click-n-save-migrated",     // Currently unused
        browserName:             "ujs-twitter-click-n-save-browser-name", // Hidden settings
        verbose:                 "ujs-twitter-click-n-save-verbose",      // Hidden settings for debug
        debugPopup:              "ujs-twitter-click-n-save-debug-popup",  // Hidden settings for debug
    };
    const StorageNamesOld = {
        settings:                "ujs-click-n-save-settings",
        settingsImageHistoryBy:  "ujs-images-history-by",
        downloadedImageNames:    "ujs-twitter-downloaded-images-names",
        downloadedImageTweetIds: "ujs-twitter-downloaded-image-tweet-ids",
        downloadedVideoTweetIds: "ujs-twitter-downloaded-video-tweet-ids",
    };
    return {StorageNames, StorageNamesOld};
}

function getDebugSettings() {
    let verbose    = false;
    let debugPopup = false;
    try {
        verbose    = Boolean(JSON.parse(localStorage.getItem(StorageNames.verbose)));
    } catch (err) {}
    try {
        debugPopup = Boolean(JSON.parse(localStorage.getItem(StorageNames.debugPopup)));
    } catch (err) {}

    return {verbose, debugPopup};
}

const historyHelper = getHistoryHelper();
historyHelper.migrateLocalStore();


// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------
// --- Twitter Specific code --- //

const downloadedImages = new LS("ujs-twitter-downloaded-images-names");
const downloadedImageTweetIds = new LS("ujs-twitter-downloaded-image-tweet-ids");
const downloadedVideoTweetIds = new LS("ujs-twitter-downloaded-video-tweet-ids");


// ---------------------------------------------------------------------------------------------------------------------



if (globalThis.GM_registerMenuCommand /* undefined in Firefox with VM */ || typeof GM_registerMenuCommand === "function") {
    GM_registerMenuCommand("Show settings", showSettings);
}

function makeName(author, authorName, stausId, mediaName, ext)
{
    return filenameGlobal.replace(/\.?{author}/, author).replace(/\.?{authorName}/, authorName).replace(/\.?{status-id}/, stausId).replace(/\.?{media-name}/, mediaName).replace(/\.?{extension}/, "." + ext);
}

function getFullImage(btn)
{   let url = btn.dataset.url;

    const originals = ["orig", "4096x4096"];
    const samples = ["large", "medium", "900x900", "small", "360x360", /*"240x240", "120x120", "tiny"*/];
    let isSample = false;
    const previewSize = new URL(url).searchParams.get("name");
    if (!samples.includes(previewSize)) {
        samples.push(previewSize);
    }

    const urlObj = new URL(url);
    if (originals.length) {
        urlObj.searchParams.set("name", originals.shift());
    } else if (samples.length) {
        isSample = true;
        urlObj.searchParams.set("name", samples.shift());
    } else {
        throw new Error("All fallback URLs are failed to download.");
    }

    urlObj.searchParams.set('format', 'jpg');
    url = urlObj.toString();

    // sa code
    console.log('_________________full image url = ' + url);
    return url;
}

function loadSettings() {
    const defaultSettings = {
        hideTrends: true,
        hideSignUpSection: true,
        hideTopicsToFollow: false,
        hideTopicsToFollowInstantly: false,
        hideSignUpBottomBarAndMessages: true,
        doNotPlayVideosAutomatically: false,
        goFromMobileToMainSite: false,

        highlightVisitedLinks: true,
        highlightOnlySpecialVisitedLinks: true,
        expandSpoilers: true,

        directLinks: true,
        handleTitle: true,

        imagesHandler: true,
        videoHandler: true,
        addRequiredCSS: true,
        preventBlinking: false,

        hideLoginPopup: false,
        addBorder: false,

        downloadProgress: true,
        strictTrackingProtectionFix: false,
    };

    let savedSettings;
    try {
        savedSettings = JSON.parse(localStorage.getItem("ujs-click-n-save-settings")) || {};
    } catch (e) {
        console.error("[ujs]", e);
        localStorage.removeItem("ujs-click-n-save-settings");
        savedSettings = {};
    }
    savedSettings = Object.assign(defaultSettings, savedSettings);
    return savedSettings;
}
function showSettings() {
    closeSetting();
    if (window.scrollY > 0) {
        document.querySelector("html").classList.add("ujs-scroll-initial");
        document.body.classList.add("ujs-scrollbar-width-margin-right");
    }
    document.body.classList.add("ujs-no-scroll");

    const modalWrapperStyle = `
    width: 100%;
    height: 100%;
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    backdrop-filter: blur(4px);
    background-color: rgba(255, 255, 255, 0.5);
  `;
    const modalSettingsStyle = `
    background-color: white;
    min-width: 320px;
    min-height: 320px;
    border: 1px solid darkgray;
    padding: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  `;
    const s = settings;
    const downloadProgressFFTitle = `Disable the download progress if you use Firefox with "Enhanced Tracking Protection" set to "Strict" and ViolentMonkey, or GreaseMonkey extension`;
    const strictTrackingProtectionFixFFTitle = `Choose this if you use ViolentMonkey, or GreaseMonkey in Firefox with "Enhanced Tracking Protection" set to "Strict". It is not required in case you use TamperMonkey.`;
    document.body.insertAdjacentHTML("afterbegin", `
  <div class="ujs-modal-wrapper" style="${modalWrapperStyle}">
      <div class="ujs-modal-settings" style="${modalSettingsStyle}">
          <fieldset>
              <legend>Optional</legend>
              <label><input type="checkbox" ${s.hideTrends ? "checked" : ""} name="hideTrends">Hide <b>Trends</b> (in the right column)*<br/></label>
              <label><input type="checkbox" ${s.hideSignUpSection ? "checked" : ""} name="hideSignUpSection">Hide <b title='"New to Twitter?" (If yoy are not logged in)'>Sign Up</b> section (in the right column)*<br/></label>
              <label><input type="checkbox" ${s.hideSignUpBottomBarAndMessages ? "checked" : ""} name="hideSignUpBottomBarAndMessages">Hide <b>Sign Up Bar</b> and <b>Messages</b> (in the bottom)<br/></label>
              <label hidden><input type="checkbox" ${s.doNotPlayVideosAutomatically ? "checked" : ""} name="doNotPlayVideosAutomatically">Do <i>Not</i> Play Videos Automatically</b><br/></label>
              <label hidden><input type="checkbox" ${s.goFromMobileToMainSite ? "checked" : ""} name="goFromMobileToMainSite">Redirect from Mobile version (beta)<br/></label>
              <label title="Makes the button more visible"><input type="checkbox" ${s.addBorder ? "checked" : ""} name="addBorder">Add a white border to the download button<br/></label>
              <label title="Hides the modal login pop up. Useful if you have no account. \nWARNING: Currently it will close any popup, not only the login one.\nIt's reccommended to use only if you do not have an account to hide the annoiyng login popup."><input type="checkbox" ${s.hideLoginPopup ? "checked" : ""} name="hideLoginPopup">Hide <strike>Login</strike> Popups (beta)<br/></label>
          </fieldset>
          <fieldset>
              <legend>Recommended</legend>
              <label><input type="checkbox" ${s.highlightVisitedLinks ? "checked" : ""} name="highlightVisitedLinks">Highlight Visited Links<br/></label>
              <label title="In most cases absolute links are 3rd-party links"><input type="checkbox" ${s.highlightOnlySpecialVisitedLinks ? "checked" : ""} name="highlightOnlySpecialVisitedLinks">Highlight Only Absolute Visited Links<br/></label>

              <label title="Note: since the recent update the most NSFW spoilers are impossible to expand without an account"><input type="checkbox" ${s.expandSpoilers ? "checked" : ""} name="expandSpoilers">Expand Spoilers (if possible)*<br/></label>
          </fieldset>
          <fieldset>
              <legend>Highly Recommended</legend>
              <label><input type="checkbox" ${s.directLinks ? "checked" : ""} name="directLinks">Direct Links</label><br/>
              <label><input type="checkbox" ${s.handleTitle ? "checked" : ""} name="handleTitle">Enchance Title*<br/></label>
          </fieldset>
          <fieldset ${isFirefox ? '': 'style="display: none"'}>
              <legend>Firefox only</legend>
              <label title='${downloadProgressFFTitle}'><input type="radio" ${s.downloadProgress ? "checked" : ""} name="firefoxDownloadProgress" value="downloadProgress">Download Progress<br/></label>
              <label title='${strictTrackingProtectionFixFFTitle}'><input type="radio" ${s.strictTrackingProtectionFix ? "checked" : ""} name="firefoxDownloadProgress" value="strictTrackingProtectionFix">Strict Tracking Protection Fix<br/></label>
          </fieldset>
          <fieldset>
              <legend>Main</legend>
              <label><input type="checkbox" ${s.imagesHandler ? "checked" : ""} name="imagesHandler">Image Download Button<br/></label>
              <label><input type="checkbox" ${s.videoHandler ? "checked" : ""} name="videoHandler">Video Download Button<br/></label>
              <label hidden><input type="checkbox" ${s.addRequiredCSS ? "checked" : ""} name="addRequiredCSS">Add Required CSS*<br/></label><!-- * Only for the image download button in /photo/1 mode -->
          </fieldset>
          <fieldset>
              <legend title="Outdated due to Twitter's updates, or impossible to reimplement">Outdated</legend>
              <strike>

              <label title="It seems Twitter no more shows this section."><input type="checkbox" ${s.hideTopicsToFollow ? "checked" : ""} name="hideTopicsToFollow">Hide <b>Topics To Follow</b> (in the right column)*<br/></label>
              <label title="Prevent the tweet backgroubd blinking on the button/image click. \nOutdated. \nTwitter have removed this disgusting behavior. This option is more no need."><input type="checkbox" ${s.preventBlinking ? "checked" : ""} name="preventBlinking">Prevent blinking on click (outdated)<br/></label>

              <label hidden><input type="checkbox" ${s.hideTopicsToFollowInstantly ? "checked" : ""} name="hideTopicsToFollowInstantly">Hide <b>Topics To Follow</b> Instantly*<br/></label>
              </strike>
          </fieldset>
          <hr>
          <div style="display: flex; justify-content: space-around;">
              <button class="ujs-save-setting-button"  style="padding: 5px">Save Settings</button>
              <button class="ujs-close-setting-button" style="padding: 5px">Close Settings</button>
          </div>
          <hr>
          <h4 style="margin: 0; padding-left: 8px; color: #444;">Notes:</h4>
          <ul style="margin: 2px; padding-left: 16px; color: #444;">
            <li>Click on <b>Save Settings</b> and <b>reload the page</b> to apply changes.</li>
            <li><b>*</b>-marked settings are language dependent. Currently, the follow languages are supported:<br/> "en", "ru", "es", "zh", "ja".</li>
            <li hidden>The extension downloads only from twitter.com, not from <b>mobile</b>.twitter.com</li>
          </ul>
      </div>
  </div>`);

    document.querySelector("body > .ujs-modal-wrapper .ujs-save-setting-button").addEventListener("click", saveSetting);
    document.querySelector("body > .ujs-modal-wrapper .ujs-close-setting-button").addEventListener("click", closeSetting);

    function saveSetting() {
        const entries = [...document.querySelectorAll("body > .ujs-modal-wrapper input[type=checkbox]")]
            .map(checkbox => [checkbox.name, checkbox.checked]);
        const radioEntries = [...document.querySelectorAll("body > .ujs-modal-wrapper input[type=radio]")]
            .map(checkbox => [checkbox.value, checkbox.checked])
        const settings = Object.fromEntries([entries, radioEntries].flat());
        settings.hideTopicsToFollowInstantly = settings.hideTopicsToFollow;
        // console.log("[ujs]", settings);
        localStorage.setItem("ujs-click-n-save-settings", JSON.stringify(settings));
    }

    function closeSetting() {
        document.body.classList.remove("ujs-no-scroll");
        document.body.classList.remove("ujs-scrollbar-width-margin-right");
        document.querySelector("html").classList.remove("ujs-scroll-initial");
        document.querySelector("body > .ujs-modal-wrapper")?.remove();
    }
}

// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------

// --- Features to execute --- //
const doNotPlayVideosAutomatically = false;

function execFeaturesOnce() {
    settings.goFromMobileToMainSite         && Features.goFromMobileToMainSite();
    settings.addRequiredCSS                 && Features.addRequiredCSS();
    settings.hideSignUpBottomBarAndMessages && Features.hideSignUpBottomBarAndMessages(doNotPlayVideosAutomatically);
    settings.hideTrends                     && Features.hideTrends();
    settings.highlightVisitedLinks          && Features.highlightVisitedLinks();
    settings.hideTopicsToFollowInstantly    && Features.hideTopicsToFollowInstantly();
    settings.hideLoginPopup                 && Features.hideLoginPopup();
}
function execFeaturesImmediately() {
    settings.expandSpoilers     && Features.expandSpoilers();
}
function execFeatures() {
    settings.imagesHandler      && Features.imagesHandler(settings.preventBlinking);
    settings.videoHandler       && Features.videoHandler(settings.preventBlinking);
    settings.expandSpoilers     && Features.expandSpoilers();
    settings.hideSignUpSection  && Features.hideSignUpSection();
    settings.hideTopicsToFollow && Features.hideTopicsToFollow();
    settings.directLinks        && Features.directLinks();
    settings.handleTitle        && Features.handleTitle();
}

// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------

if (verbose) {
    console.log("[ujs][settings]", settings);
    // showSettings();
}

const fetch = ujs_getGlobalFetch({verbose, strictTrackingProtectionFix: settings.strictTrackingProtectionFix});

function ujs_getGlobalFetch({verbose, strictTrackingProtectionFix} = {}) {
    const useFirefoxStrictTrackingProtectionFix = strictTrackingProtectionFix === undefined ? true : strictTrackingProtectionFix; // Let's use by default
    const useFirefoxFix = useFirefoxStrictTrackingProtectionFix && typeof wrappedJSObject === "object" && typeof wrappedJSObject.fetch === "function";
    // --- [VM/GM + Firefox ~90+ + Enabled "Strict Tracking Protection"] fix --- //
    function fixedFirefoxFetch(resource, init = {}) {
        verbose && console.log("wrappedJSObject.fetch", resource, init);
        if (init.headers instanceof Headers) {
            // Since `Headers` are not allowed for structured cloning.
            init.headers = Object.fromEntries(init.headers.entries());
        }
        return wrappedJSObject.fetch(cloneInto(resource, document), cloneInto(init, document));
    }
    return useFirefoxFix ? fixedFirefoxFetch : globalThis.fetch;
}

// --- That to use for the image history --- //
// "TWEET_ID" or "IMAGE_NAME"
const imagesHistoryBy = LS.getItem("ujs-images-history-by", "IMAGE_NAME");
// With "TWEET_ID" downloading of 1 image of 4 will mark all 4 images as "already downloaded"
// on the next time when the tweet will appear.
// "IMAGE_NAME" will count each image of a tweet, but it will take more data to store.

// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------
// --- Script runner --- //

(function starter(feats) {
    const {once, onChangeImmediate, onChange} = feats;

    once();
    onChangeImmediate();
    const onChangeThrottled = throttle(onChange, 250);
    onChangeThrottled();

    const targetNode = document.querySelector("body");
    const observerOptions = {
        subtree: true,
        childList: true,
    };
    const observer = new MutationObserver(callback);
    observer.observe(targetNode, observerOptions);

    function callback(mutationList, observer) {
        verbose && console.log(mutationList);
        onChangeImmediate();
        onChangeThrottled();
    }
})({
    once: execFeaturesOnce,
    onChangeImmediate: execFeaturesImmediately,
    onChange: execFeatures
});

// --- Twitter.Features --- //
function hoistFeatures() {
    class Features {
        mainUrl;
        static goFromMobileToMainSite() {
            if (location.href.startsWith("https://mobile.twitter.com/")) {
                location.href = location.href.replace("https://mobile.twitter.com/", "https://twitter.com/");
            }
            // TODO: add #redirected, remove by timer // to prevent a potential infinity loop
        }

        static rightClickHandler(ev, btn) {
            ev.preventDefault();
            let fullImageUrl = getFullImage(btn);

            if (window.event.ctrlKey)
            {   console.log("control right click");
                window.open(fullImageUrl, "_blank");
            }
            else
            {   navigator.clipboard.writeText(fullImageUrl);
                console.log("right click");
            }
            return false;
        }

        static createButton({url, downloaded, isVideo}) {
            this.mainUrl = url;
            const btn = document.createElement("div");
            btn.innerHTML = `
<div class="ujs-btn-common ujs-btn-background"></div>
<div class="ujs-btn-common ujs-hover"></div>
<div class="ujs-btn-common ujs-shadow"></div>
<div class="ujs-btn-common ujs-progress" style="--progress: 0%"></div>
<div class="ujs-btn-common ujs-btn-error-text"></div>`.slice(1);

           //btn.classList.add("buttonParent");
            btn.classList.add("ujs-btn-download");
            if (!downloaded) {
                btn.classList.add("ujs-not-downloaded");
            } else {
                btn.classList.add("ujs-already-downloaded");
            }
            if (isVideo) {
                btn.classList.add("ujs-video");
            }
            if (url) {
                btn.dataset.url = url;
            }
            return btn;
        }

        static hasBlinkListenerWeakSet;
        static _preventBlinking(clickBtnElem) {
            const weakSet = Features.hasBlinkListenerWeakSet || (Features.hasBlinkListenerWeakSet = new WeakSet());
            let wrapper;
            clickBtnElem.addEventListener("mouseenter", () => {
                if (!weakSet.has(clickBtnElem)) {
                    wrapper = Features._preventBlinkingHandler(clickBtnElem);
                    weakSet.add(clickBtnElem);
                }
            });
            clickBtnElem.addEventListener("mouseleave", () => {
                verbose && console.log("[ujs] Btn mouseleave");
                if (wrapper?.observer?.disconnect) {
                    weakSet.delete(clickBtnElem);
                    wrapper.observer.disconnect();
                }
            });
        }
        static _preventBlinkingHandler(clickBtnElem) {
            let targetNode = clickBtnElem.closest("[aria-labelledby]");
            if (!targetNode) {
                return;
            }
            let config = {attributes: true, subtree: true, attributeOldValue: true};
            const wrapper = {};
            wrapper.observer = new MutationObserver(callback);
            wrapper.observer.observe(targetNode, config);

            function callback(mutationsList, observer) {
                for (const mutation of mutationsList) {
                    if (mutation.type === "attributes" && mutation.attributeName === "class") {
                        if (mutation.target.classList.contains("ujs-btn-download")) {
                            return;
                        }
                        // Don't allow to change classList
                        mutation.target.className = mutation.oldValue;

                        // Recreate, to prevent an infinity loop
                        wrapper.observer.disconnect();
                        wrapper.observer = new MutationObserver(callback);
                        wrapper.observer.observe(targetNode, config);
                    }
                }
            }

            return wrapper;
        }

        static _markButtonAsDownloaded(btn) {
            btn.classList.remove("ujs-downloading");
            btn.classList.remove("ujs-recently-downloaded");
            btn.classList.add("ujs-downloaded");
            btn.addEventListener("pointerenter", e => {
                btn.classList.add("ujs-recently-downloaded");
            }, {once: true});
        }

        // Banner/Background
        static async _downloadBanner(url, btn) {
            const username = location.pathname.slice(1).split("/")[0];

            btn.classList.add("ujs-downloading");

            // https://pbs.twimg.com/profile_banners/34743251/1596331248/1500x500
            const {
                id, seconds, res
            } = url.match(/(?<=\/profile_banners\/)(?<id>\d+)\/(?<seconds>\d+)\/(?<res>\d+x\d+)/)?.groups || {};

            const {blob, lastModifiedDate, extension, name} = await fetchResource(url);

            Features.verifyBlob(blob, url, btn);

            const filename = `twitter[bg] @${username}—${id}—${seconds}—.${extension}`;
            downloadBlob(blob, filename, url);

            btn.classList.remove("ujs-downloading");
            btn.classList.add("ujs-downloaded");
        }

        static _ImageHistory = class {
            static getImageNameFromUrl(url) {
                const _url = new URL(url);
                const {filename} = (_url.origin + _url.pathname).match(/(?<filename>[^\/]+$)/).groups;
                return filename.match(/^[^.]+/)[0]; // remove extension
            }
            static isDownloaded({id, url}) {
                if (imagesHistoryBy === "TWEET_ID") {
                    return downloadedImageTweetIds.hasItem(id);
                } else if (imagesHistoryBy === "IMAGE_NAME") {
                    const name = Features._ImageHistory.getImageNameFromUrl(url);
                    return downloadedImages.hasItem(name);
                }
            }
            static async markDownloaded({id, url}) {
                if (imagesHistoryBy === "TWEET_ID") {
                    await downloadedImageTweetIds.pushItem(id);
                } else if (imagesHistoryBy === "IMAGE_NAME") {
                    const name = Features._ImageHistory.getImageNameFromUrl(url);
                    await downloadedImages.pushItem(name);
                }
            }
        }
        static async imagesHandler(preventBlinking) {
            verbose && console.log("[ujs-cns][imagesHandler]");
            const images = document.querySelectorAll("img");
            for (const img of images) {

                if (img.width < 150 || img.dataset.handled) {
                    continue;
                }
                verbose && console.log(img, img.width);

                img.dataset.handled = "true";

                const btn = Features.createButton({url: img.src});
                btn.addEventListener("click", Features._imageClickHandler);
                btn.addEventListener('contextmenu', (ev) => Features.rightClickHandler(ev, btn));

                let anchor = img.closest("a");
                // if an image is _opened_ "https://twitter.com/UserName/status/1234567890123456789/photo/1" [fake-url]
                if (!anchor) {
                    anchor = img.parentNode;
                }
                anchor.append(btn);
                if (preventBlinking) {
                    Features._preventBlinking(btn);
                }

                const downloaded = Features._ImageHistory.isDownloaded({
                    id: Tweet.of(btn).id,
                    url: btn.dataset.url
                });
                if (downloaded) {
                    btn.classList.add("ujs-already-downloaded");
                }
            }
        }
        static async _imageClickHandler(event) {
            event.preventDefault();
            event.stopImmediatePropagation();

            const btn = event.currentTarget;
            const btnErrorTextElem = btn.querySelector(".ujs-btn-error-text");
            let url = btn.dataset.url;

            const isBanner = url.includes("/profile_banners/");
            if (isBanner) {
                return Features._downloadBanner(url, btn);
            }

            const {id, author} = Tweet.of(btn);
            console.log('aaaaaaaaaaaaaa');
            console.log('id = ' + id + ', author = ' + author);

            const btnProgress = btn.querySelector(".ujs-progress");
            if (btn.textContent !== "") {
                btnErrorTextElem.textContent = "";
            }
            btn.classList.remove("ujs-error");
            btn.classList.add("ujs-downloading");

            let onProgress = null;
            if (settings.downloadProgress) {
                onProgress = ({loaded, total}) => btnProgress.style.cssText = "--progress: " + loaded / total * 90 + "%";
            }

            const originals = ["orig", "4096x4096"];
            const samples = ["large", "medium", "900x900", "small", "360x360", /*"240x240", "120x120", "tiny"*/];
            let isSample = false;
            const previewSize = new URL(url).searchParams.get("name");
            if (!samples.includes(previewSize)) {
                samples.push(previewSize);
            }

            function handleImgUrl(url) {
                const urlObj = new URL(url);
                if (originals.length) {
                    urlObj.searchParams.set("name", originals.shift());
                } else if (samples.length) {
                    isSample = true;
                    urlObj.searchParams.set("name", samples.shift());
                } else {
                    throw new Error("All fallback URLs are failed to download.");
                }

                urlObj.searchParams.set('format', 'jpg');
                url = urlObj.toString();

                // sa code
                console.log('_________________');
                console.log(url);

                return url;
            }

            async function safeFetchResource(url) {
                while (true) {
                    console.log("___url " + url);
                    url = handleImgUrl(url);
                    try {
                        return await fetchResource(url, onProgress);
                    } catch (e) {
                        if (!originals.length) {
                            btn.classList.add("ujs-error");
                            btnErrorTextElem.textContent = "";
                            // Add ⚠
                            btnErrorTextElem.style = `background-image: url("https://abs-0.twimg.com/emoji/v2/svg/26a0.svg"); background-size: 1.5em; background-position: center; background-repeat: no-repeat;`;
                            btn.title = "[warning] Original images are not available.";
                        }

                        const ffAutoAllocateChunkSizeBug = e.message.includes("autoAllocateChunkSize"); // https://bugzilla.mozilla.org/show_bug.cgi?id=1757836
                        if (!samples.length || ffAutoAllocateChunkSizeBug) {
                            btn.classList.add("ujs-error");
                            btnErrorTextElem.textContent = "";
                            // Add ❌
                            btnErrorTextElem.style = `background-image: url("https://abs-0.twimg.com/emoji/v2/svg/274c.svg"); background-size: 1.5em; background-position: center; background-repeat: no-repeat;`;

                            const ffHint = isFirefox && !settings.strictTrackingProtectionFix && ffAutoAllocateChunkSizeBug ? "\nTry to enable 'Strict Tracking Protection Fix' in the userscript settings." : "";
                            btn.title = "Failed to download the image." + ffHint;
                            throw new Error("[error] Fallback URLs are failed.");
                        }
                    }
                }
            }

            const {blob, lastModifiedDate, extension, name} = await safeFetchResource(url);

            Features.verifyBlob(blob, url, btn);

            btnProgress.style.cssText = "--progress: 100%";

            const sampleText = !isSample ? "" : "[sample]";

            // image filename
            // const filename = `twitter${sampleText}—${author}—${id}—${name}—.${extension}`;
            console.log("___url : " + url);
            let authorName = await API.getAuthorName(btn);
            let filename = makeName(author, authorName, id, name, extension);
            console.log("_____________out: " + filename);

            downloadBlob(blob, filename, url);

            const downloaded = btn.classList.contains("already-downloaded");
            if (!downloaded && !isSample) {
                await Features._ImageHistory.markDownloaded({id, url});
            }
            btn.classList.remove("ujs-downloading");
            btn.classList.add("ujs-downloaded");

            await sleep(40);
            btnProgress.style.cssText = "--progress: 0%";
        }

        static tweetVidWeakMap = new WeakMap();
        static async videoHandler(preventBlinking) {
            const videos = document.querySelectorAll("video");

            for (const vid of videos) {
                if (vid.dataset.handled) {
                    continue;
                }
                verbose && console.log(vid);
                vid.dataset.handled = "true";

                const poster = vid.getAttribute("poster");

                const btn = Features.createButton({isVideo: true, url: poster});
                btn.addEventListener("click", Features._videoClickHandler);

                let elem = vid.parentNode.parentNode.parentNode;
                elem.after(btn);
                if (preventBlinking) {
                    Features._preventBlinking(btn);
                }

                const tweet = Tweet.of(btn);
                const id = tweet.id;
                const tweetElem = tweet.elem;
                let vidNumber = 0;

                const map = Features.tweetVidWeakMap;
                if (map.has(tweetElem)) {
                    vidNumber = map.get(tweetElem) + 1;
                    map.set(tweetElem, vidNumber);
                } else {
                    map.set(tweetElem, vidNumber);
                }

                const historyId = vidNumber ? id + "-" + vidNumber : id;

                const downloaded = downloadedVideoTweetIds.hasItem(historyId);
                if (downloaded) {
                    btn.classList.add("ujs-already-downloaded");
                }
            }
        }

        /*
        static async _videoClickHandler(event) {
            event.preventDefault();
            event.stopImmediatePropagation();

            const btn = event.currentTarget;
            const btnErrorTextElem = btn.querySelector(".ujs-btn-error-text");
            let {id, author} = Tweet.of(btn);

            if (btn.textContent !== "") {
                btnErrorTextElem.textContent = "";
            }
            btn.classList.remove("ujs-error");
            btn.classList.add("ujs-downloading");

            const posterUrl = btn.dataset.url;

            let video; // {bitrate, content_type, url}
            let vidNumber = 0;
            let authorName;
            try {
                ({video, tweetId: id, screenName: author, vidNumber, authorName} = await API.getVideoInfo(id, author, posterUrl));
                verbose && console.log("[ujs][videoHandler][video]", video);
            } catch (e) {
                btn.classList.add("ujs-error");
                btnErrorTextElem.textContent = "Error";
                btn.title = "API.getVideoInfo Error";
                throw new Error("API.getVideoInfo Error");
            }

            const btnProgress = btn.querySelector(".ujs-progress");

            const url = video.url;
            let onProgress = null;
            if (settings.downloadProgress) {
                onProgress = ({loaded, total}) => btnProgress.style.cssText = "--progress: " + loaded / total * 90 + "%";
            }

            const {blob, lastModifiedDate, extension, name} = await fetchResource(url, onProgress);

            btnProgress.style.cssText = "--progress: 100%";

            Features.verifyBlob(blob, url, btn);

            // video filename
            //const filename = `twitter ${author}——${id}—${name}—.${extension}`;
            //const filename = `twitter @${author}, ${authorName}, ${id}, ${name}.${extension}`;
            let filename = makeName(author, authorName, id, name, extension);
            console.log("_____________out: " + filename);

            downloadBlob(blob, filename, url);

            const downloaded = btn.classList.contains("ujs-already-downloaded");
            const historyId = vidNumber ? id + "-" + vidNumber : id;
            if (!downloaded) {
                await downloadedVideoTweetIds.pushItem(historyId);
            }
            btn.classList.remove("ujs-downloading");
            btn.classList.add("ujs-downloaded");

            await sleep(40);
            btnProgress.style.cssText = "--progress: 0%";
        }
        */


        static async _videoClickHandler(event) { // todo: parse the URL from HTML (For "Embedded video" (?))
            event.preventDefault();
            event.stopImmediatePropagation();

            const btn = event.currentTarget;
            const btnErrorTextElem = btn.querySelector(".ujs-btn-error-text");
            const {id} = Tweet.of(btn);

            if (btn.textContent !== "") {
                btnErrorTextElem.textContent = "";
            }
            btn.classList.remove("ujs-error");
            btn.classList.add("ujs-downloading");

            let mediaEntry;
            try {
                const medias = await API.getTweetMedias(id);
                const posterUrl = btn.dataset.url; // [note] if `posterUrl` has `searchParams`, it will have no extension at the end of `pathname`.
                const posterUrlClear = removeSearchParams(posterUrl);
                mediaEntry = medias.find(media => media.preview_url.startsWith(posterUrlClear));
                verbose && console.log("[ujs][_videoClickHandler] mediaEntry", mediaEntry);
            } catch (err) {
                console.error(err);
                btn.classList.add("ujs-error");
                btnErrorTextElem.textContent = "Error";
                btn.title = "API.getVideoInfo Error";
                throw new Error("API.getVideoInfo Error");
            }

            await Features._downloadVideoMediaEntry(mediaEntry, btn, id);
            Features._markButtonAsDownloaded(btn);
        }

        static async _downloadVideoMediaEntry(mediaEntry, btn, id /* of original tweet */) {
            const {
                screen_name:  author,
                tweet_id:     videoTweetId,
                download_url: url,
                type_index:   vidNumber,
            } = mediaEntry;
            if (!url) {
                throw new Error("No video URL found");
            }

            const btnProgress = btn.querySelector(".ujs-progress");

            let onProgress = null;
            if (settings.downloadProgress) {
                onProgress = ({loaded, total}) => btnProgress.style.cssText = "--progress: " + loaded / total * 90 + "%";
            }

            async function safeFetchResource(url, onProgress) {
                try {
                    return await fetchResource(url, onProgress);
                } catch (err) {
                    const btnErrorTextElem = btn.querySelector(".ujs-btn-error-text");
                    const ffAutoAllocateChunkSizeBug = err.message.includes("autoAllocateChunkSize"); // https://bugzilla.mozilla.org/show_bug.cgi?id=1757836
                    btn.classList.add("ujs-error");
                    btnErrorTextElem.textContent = "";
                    // Add ❌
                    btnErrorTextElem.style = `background-image: url("https://abs-0.twimg.com/emoji/v2/svg/274c.svg"); background-size: 1.5em; background-position: center; background-repeat: no-repeat;`;

                    const ffHint = isFirefox && !settings.strictTrackingProtectionFix && ffAutoAllocateChunkSizeBug ? "\nTry to enable 'Strict Tracking Protection Fix' in the userscript settings." : "";
                    btn.title = "Video download failed." + ffHint;
                    throw new Error("[error] Video download failed.");
                }
            }

            const {blob, lastModifiedDate, extension, name} = await safeFetchResource(url, onProgress);

            btnProgress.style.cssText = "--progress: 100%";

            Features.verifyBlob(blob, url, btn);

            // video filename
            //const filename = `twitter ${author}——${id}—${name}—.${extension}`;
            //const filename = `twitter @${author}, ${authorName}, ${id}, ${name}.${extension}`;
            let video; // {bitrate, content_type, url}
            let authorName = API.getAuthorName(btn);

            let filename = makeName(author, authorName, id, name, extension);
            console.log("_____________out: " + filename);
            downloadBlob(blob, filename, url);

            const downloaded = btn.classList.contains("ujs-already-downloaded");
            const historyId = vidNumber /* not 0 */ ? videoTweetId + "-" + vidNumber : videoTweetId;
            if (!downloaded) {
                await downloadedVideoTweetIds.pushItem(historyId);
                if (videoTweetId !== id) { // if QRT
                    const historyId = vidNumber ? id + "-" + vidNumber : id;
                    await downloadedVideoTweetIds.pushItem(historyId);
                }
            }

            if (btn.dataset.isMultiMedia) { // dirty fix
                const isDownloaded = downloadedVideoTweetIds.hasItem(historyId);
                if (!isDownloaded) {
                    await downloadedVideoTweetIds.pushItem(historyId);
                    if (videoTweetId !== id) { // if QRT
                        const historyId = vidNumber ? id + "-" + vidNumber : id;
                        await downloadedVideoTweetIds.pushItem(historyId);
                    }
                }
            }

            await sleep(40);
            btnProgress.style.cssText = "--progress: 0%";
        }



        static verifyBlob(blob, url, btn) {
            if (!blob.size) {
                btn.classList.add("ujs-error");
                btn.querySelector(".ujs-btn-error-text").textContent = "Error";
                btn.title = "Download Error";
                throw new Error("Zero size blob: " + url);
            }
        }

        static addRequiredCSS() {
            const code = getUserScriptCSS();
            addCSS(code);
        }

        // it depends of `directLinks()` use only it after `directLinks()`
        static handleTitle(title) {

            if (!I18N.QUOTES) { // Unsupported lang, no QUOTES, ON_TWITTER, TWITTER constants
                return;
            }

            // if not an opened tweet
            if (!location.href.match(/twitter\.com\/[^\/]+\/status\/\d+/)) {
                return;
            }

            let titleText = title || document.title;
            if (titleText === Features.lastHandledTitle) {
                return;
            }
            Features.originalTitle = titleText;

            const [OPEN_QUOTE, CLOSE_QUOTE] = I18N.QUOTES;
            const urlsToReplace = [
                ...titleText.matchAll(new RegExp(`https:\\/\\/t\\.co\\/[^ ${CLOSE_QUOTE}]+`, "g"))
            ].map(el => el[0]);
            // the last one may be the URL to the tweet // or to an embedded shared URL

            const map = new Map();
            const anchors = document.querySelectorAll(`a[data-redirect^="https://t.co/"]`);
            for (const anchor of anchors) {
                if (urlsToReplace.includes(anchor.dataset.redirect)) {
                    map.set(anchor.dataset.redirect, anchor.href);
                }
            }

            const lastUrl = urlsToReplace.slice(-1)[0];
            let lastUrlIsAttachment = false;
            let attachmentDescription = "";
            if (!map.has(lastUrl)) {
                const a = document.querySelector(`a[href="${lastUrl}?amp=1"]`);
                if (a) {
                    lastUrlIsAttachment = true;
                    attachmentDescription = document.querySelectorAll(`a[href="${lastUrl}?amp=1"]`)[1].innerText;
                    attachmentDescription = attachmentDescription.replaceAll("\n", " — ");
                }
            }

            for (const [key, value] of map.entries()) {
                titleText = titleText.replaceAll(key, value + ` (${key})`);
            }

            titleText = titleText.replace(new RegExp(`${I18N.ON_TWITTER}(?= ${OPEN_QUOTE})`), ":");
            titleText = titleText.replace(new RegExp(`(?<=${CLOSE_QUOTE}) \\\/ ${I18N.TWITTER}$`), "");
            if (!lastUrlIsAttachment) {
                const regExp = new RegExp(`(?<short> https:\\/\\/t\\.co\\/.{6,14})${CLOSE_QUOTE}$`);
                titleText = titleText.replace(regExp, (match, p1, p2, offset, string) => `${CLOSE_QUOTE} —${p1}`);
            } else {
                titleText = titleText.replace(lastUrl, `${lastUrl} (${attachmentDescription})`);
            }
            document.title = titleText; // Note: some characters will be removed automatically (`\n`, extra spaces)
            Features.lastHandledTitle = document.title;
        }
        static lastHandledTitle = "";
        static originalTitle = "";

        static profileUrlCache = new Map();
        static async directLinks() {
            verbose && console.log("[ujs][directLinks]");
            const hasHttp = url => Boolean(url.match(/^https?:\/\//));
            const anchors = xpathAll(`.//a[@dir="ltr" and child::span and not(@data-handled)]`);
            for (const anchor of anchors) {
                const redirectUrl = new URL(anchor.href);
                const shortUrl = redirectUrl.origin + redirectUrl.pathname; // remove "?amp=1"

                const hrefAttr = anchor.getAttribute("href");
                if (hrefAttr.startsWith("/")) {
                    anchor.dataset.handled = "true";
                    return;
                }

                verbose && console.log("[ujs][directLinks]", hrefAttr, redirectUrl.href, shortUrl);

                anchor.dataset.redirect = shortUrl;
                anchor.dataset.handled = "true";
                anchor.rel = "nofollow noopener noreferrer";

                if (Features.profileUrlCache.has(shortUrl)) {
                    anchor.href = Features.profileUrlCache.get(shortUrl);
                    continue;
                }

                const nodes = xpathAll(`./span[text() != "…"]|./text()`, anchor);
                let url = nodes.map(node => node.textContent).join("");

                const doubleProtocolPrefix = url.match(/(?<dup>^https?:\/\/)(?=https?:)/)?.groups.dup;
                if (doubleProtocolPrefix) {
                    url = url.slice(doubleProtocolPrefix.length);
                    const span = anchor.querySelector(`[aria-hidden="true"]`);
                    if (hasHttp(span.textContent)) { // Fix Twitter's bug related to text copying
                        span.style = "display: none;";
                    }
                }

                anchor.href = url;

                if (anchor.dataset?.testid === "UserUrl") {
                    const href = anchor.getAttribute("href");
                    const profileUrl = hasHttp(href) ? href : "https://" + href;
                    anchor.href = profileUrl;
                    verbose && console.log("[ujs][directLinks][UserUrl]", profileUrl);

                    // Restore if URL's text content is too long
                    if (anchor.textContent.endsWith("…")) {
                        anchor.href = shortUrl;

                        try {
                            const author = location.pathname.slice(1).match(/[^\/]+/)[0];
                            console.log("___author: ");
                            console.log("___author: " + author);
                            const expanded_url = await API.getUserInfo(author); // todo: make lazy
                            anchor.href = expanded_url;
                            Features.profileUrlCache.set(shortUrl, expanded_url);
                        } catch (e) {
                            verbose && console.error(e);
                        }
                    }
                }
            }
            if (anchors.length) {
                Features.handleTitle(Features.originalTitle);
            }
        }

        // Do NOT throttle it
        static expandSpoilers() {
            const main = document.querySelector("main[role=main]");
            if (!main) {
                return;
            }

            if (!I18N.YES_VIEW_PROFILE) { // Unsupported lang, no YES_VIEW_PROFILE, SHOW_NUDITY, VIEW constants
                return;
            }

            const a = main.querySelectorAll("[data-testid=primaryColumn] [role=button]");
            if (a) {
                const elems = [...a];
                const button = elems.find(el => el.textContent === I18N.YES_VIEW_PROFILE);
                if (button) {
                    button.click();
                }

                // "Content warning: Nudity"
                // "The Tweet author flagged this Tweet as showing sensitive content."
                // "Show"
                const buttonShow = elems.find(el => el.textContent === I18N.SHOW_NUDITY);
                if (buttonShow) {
                    // const verifying = a.previousSibling.textContent.includes("Nudity"); // todo?
                    // if (verifying) {
                    buttonShow.click();
                    // }
                }
            }

            // todo: expand spoiler commentary in photo view mode (.../photo/1)
            const b = main.querySelectorAll("article [role=presentation] div[role=button]");
            if (b) {
                const elems = [...b];
                const buttons = elems.filter(el => el.textContent === I18N.VIEW);
                if (buttons.length) {
                    buttons.forEach(el => el.click());
                }
            }
        }

        static hideSignUpSection() { // "New to Twitter?"
            if (!I18N.SIGNUP) {// Unsupported lang, no SIGNUP constant
                return;
            }
            const elem = document.querySelector(`section[aria-label="${I18N.SIGNUP}"][role=region]`);
            if (elem) {
                elem.parentNode.classList.add("ujs-hidden");
            }
        }

        // Call it once.
        // "Don’t miss what’s happening" if you are not logged in.
        // It looks that `#layers` is used only for this bar.
        static hideSignUpBottomBarAndMessages(doNotPlayVideosAutomatically) {
            if (doNotPlayVideosAutomatically) {
                addCSS(`
                    #layers > div:nth-child(1) {
                        display: none;
                    }
                `);
            } else {
                addCSS(`
                    #layers > div:nth-child(1) {
                        height: 1px;
                        opacity: 0;
                    }
                `);
            }
        }

        // "Trends for you"
        static hideTrends() {
            if (!I18N.TRENDS) { // Unsupported lang, no TRENDS constant
                return;
            }
            addCSS(`
                [aria-label="${I18N.TRENDS}"]
                {
                    display: none;
                }
            `);
        }

        static highlightVisitedLinks() {
            if (settings.highlightOnlySpecialVisitedLinks) {
                addCSS(`
                    a[href^="http"]:visited {
                        color: darkorange;
                    }
                `);
                return;
            }
            addCSS(`
                a:visited {
                    color: darkorange;
                }
            `);
        }

        // Hides "TOPICS TO FOLLOW" only in the right column, NOT in timeline.
        // Use it once. To prevent blinking.
        static hideTopicsToFollowInstantly() {
            if (!I18N.TOPICS_TO_FOLLOW) { // Unsupported lang, no TOPICS_TO_FOLLOW constant
                return;
            }
            addCSS(`
                div[aria-label="${I18N.TOPICS_TO_FOLLOW}"] {
                    display: none;
                }
            `);
        }

        // Hides container and "separator line"
        static hideTopicsToFollow() {
            if (!I18N.TOPICS_TO_FOLLOW) { // Unsupported lang, no TOPICS_TO_FOLLOW constant
                return;
            }

            const elem = xpath(`.//section[@role="region" and child::div[@aria-label="${I18N.TOPICS_TO_FOLLOW}"]]/../..`);
            if (!elem) {
                return;
            }
            elem.classList.add("ujs-hidden");

            elem.previousSibling.classList.add("ujs-hidden"); // a "separator line" (empty element of "TRENDS", for example)
            // in fact it's a hack // todo rework // may hide "You might like" section [bug]
        }

        // todo split to two methods
        // todo fix it, currently it works questionably
        // not tested with non eng langs
        static footerHandled = false;
        static hideAndMoveFooter() { // "Terms of Service   Privacy Policy   Cookie Policy"
            let footer = document.querySelector(`main[role=main] nav[aria-label=${I18N.FOOTER}][role=navigation]`);
            const nav  = document.querySelector("nav[aria-label=Primary][role=navigation]"); // I18N."Primary" [?]

            if (footer) {
                footer = footer.parentNode;
                const separatorLine = footer.previousSibling;

                if (Features.footerHandled) {
                    footer.remove();
                    separatorLine.remove();
                    return;
                }

                nav.append(separatorLine);
                nav.append(footer);
                footer.classList.add("ujs-show-on-hover");
                separatorLine.classList.add("ujs-show-on-hover");

                Features.footerHandled = true;
            }
        }

        static hideLoginPopup() { // When you are not logged in
            const targetNode = document.querySelector("html");
            const observerOptions = {
                attributes: true,
            };
            const observer = new MutationObserver(callback);
            observer.observe(targetNode, observerOptions);

            function callback(mutationList, observer) {
                const html = document.querySelector("html");
                console.log(mutationList);
                // overflow-y: scroll; overscroll-behavior-y: none; font-size: 15px;                     // default
                // overflow: hidden; overscroll-behavior-y: none; font-size: 15px; margin-right: 15px;   // popup
                if (html.style["overflow"] === "hidden") {
                    html.style["overflow"] = "";
                    html.style["overflow-y"] = "scroll";
                    html.style["margin-right"] = "";
                }
                const popup = document.querySelector(`#layers div[data-testid="sheetDialog"]`);
                if (popup) {
                    popup.closest(`div[role="dialog"]`).remove();
                    verbose && (document.title = "⚒" + document.title);
                    // observer.disconnect();
                }
            }
        }

    }

    return Features;
}

// --- Twitter.RequiredCSS --- //
function getUserScriptCSS() {
    const labelText = I18N.IMAGE || "Image";

    // By default, the scroll is showed all time, since <html style="overflow-y: scroll;>,
    // so it works — no need to use `getScrollbarWidth` function from SO (13382516).
    const scrollbarWidth = window.innerWidth - document.body.offsetWidth;

    const css = `
.ujs-hidden {
    display: none;
}
.ujs-no-scroll {
    overflow-y: hidden;
}
.ujs-scroll-initial {
    overflow-y: initial!important;
}
.ujs-scrollbar-width-margin-right {
    margin-right: ${scrollbarWidth}px;
}

.ujs-show-on-hover:hover {
    opacity: 1;
    transition: opacity 1s ease-out 0.1s;
}
.ujs-show-on-hover {
    opacity: 0;
    transition: opacity 0.5s ease-out;
}

:root {
    --ujs-shadow-1: linear-gradient(to top, rgba(0,0,0,0.15), rgba(0,0,0,0.05));
    --ujs-shadow-2: linear-gradient(to top, rgba(0,0,0,0.25), rgba(0,0,0,0.05));
    --ujs-shadow-3: linear-gradient(to top, rgba(0,0,0,0.45), rgba(0,0,0,0.15));
    --ujs-shadow-4: linear-gradient(to top, rgba(0,0,0,0.55), rgba(0,0,0,0.25));
    --ujs-red:   #e0245e;
    --ujs-blue:  #1da1f2;
    --ujs-green: #4caf50;
    --ujs-gray:  #c2cbd0;
    --ujs-yellow:#FFFF00;
    --ujs-error: white;
}

.ujs-progress {
  background-image: linear-gradient(to right, var(--ujs-yellow) var(--progress), transparent 0%);
}

.ujs-shadow {
  background-image: var(--ujs-shadow-1);
}
.ujs-btn-download:hover .ujs-hover {
  background-image: var(--ujs-shadow-2);
}
.ujs-btn-download.ujs-downloading .ujs-shadow {
  background-image: var(--ujs-shadow-3);
}
.ujs-btn-download:active .ujs-shadow {
  background-image: var(--ujs-shadow-4);
}

article[role=article]:hover .ujs-btn-download {
    opacity: 1;
}
div[aria-label="${labelText}"]:hover .ujs-btn-download {
    opacity: 1;
}
.ujs-btn-download.ujs-downloaded {
    opacity: 1;
}
.ujs-btn-download.ujs-downloading {
    opacity: 1;
}

.ujs-btn-download {
  cursor: pointer;
  top: 6em;
  left: 0.5em;
  position: absolute;
  opacity: 0;
}
.ujs-btn-common {
  width: 33px;
  height: 33px;
  border-radius: 0.3em;
  top: 0;
  position: absolute;
  border: 1px solid transparent;
  border-color: var(--ujs-gray);
  ${settings.addBorder ? "border: 2px solid white;" : "border-color: var(--ujs-gray);"}
}
.buttonParent {
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0px;
  left: 0px;
  right: 0px;
}
.ujs-not-downloaded .ujs-btn-background {
  background: var(--ujs-red);
}

.ujs-already-downloaded .ujs-btn-background {
  background: var(--ujs-green);
}

.ujs-downloaded .ujs-btn-background {
  background: var(--ujs-green);
}

.ujs-error .ujs-btn-background {
  background: var(--ujs-error);
}

.ujs-btn-error-text {
  display: flex;
  align-items: center;
  justify-content: center;
  color: black;
  font-size: 100%;
}`;
    return css.slice(1);
}

/*
Features depend on:

addRequiredCSS: IMAGE

expandSpoilers:     YES_VIEW_PROFILE,   SHOW_NUDITY,  VIEW
handleTitle:        QUOTES,             ON_TWITTER,   TWITTER
hideSignUpSection:  SIGNUP
hideTrends:         TRENDS
hideTopicsToFollowInstantly: TOPICS_TO_FOLLOW,

hideTopicsToFollow:          TOPICS_TO_FOLLOW,

[unused]
hideAndMoveFooter:  FOOTER
*/

// --- Twitter.LangConstants --- //
function getLanguageConstants() { //todo: "de", "fr"
    const defaultQuotes = [`"`, `"`];

    const SUPPORTED_LANGUAGES = ["en",                     "ru",                     "es",                                 "zh",               "ja",                       ];

    // texts
    const VIEW                = ["View",                   "Посмотреть",             "Ver",                                "查看",             "表示",                      ];
    const YES_VIEW_PROFILE    = ["Yes, view profile",      "Да, посмотреть профиль", "Sí, ver perfil",                     "是,查看个人资料",   "プロフィールを表示する",      ];

    const SHOW_NUDITY         = ["Show",                   "Показать",               "Mostrar",                            "显示",              "表示",                     ];
    // aria-label texts
    const IMAGE               = ["Image",                  "Изображение",            "Imagen",                             "图像",              "画像",                     ];
    const SIGNUP              = ["Sign up",                "Зарегистрироваться",     "Regístrate",                         "注册",             "アカウント作成",              ];
    const TRENDS              = ["Timeline: Trending now", "Лента: Актуальные темы", "Cronología: Tendencias del momento", "时间线:当前趋势",   "タイムライン: トレンド",      ];
    const TOPICS_TO_FOLLOW    = ["Timeline: ",             "Лента: ",                "Cronología: ",                       "时间线:", /*[1]*/  "タイムライン: ",  /*[1]*/    ];
    const WHO_TO_FOLLOW       = ["Who to follow",          "Кого читать",            "A quién seguir",                     "推荐关注",          "おすすめユーザー"             ];
    const FOOTER              = ["Footer",                 "Нижний колонтитул",      "Pie de página",                      "页脚",             "フッター",                   ];
    // *1 — it's a suggestion, need to recheck. But I can't find a page where I can check it. Was it deleted?

    // document.title "{AUTHOR}{ON_TWITTER} {QUOTES[0]}{TEXT}{QUOTES[1]} / {TWITTER}"
    const QUOTES              = [defaultQuotes,            [`«`, `»`],               defaultQuotes,                        defaultQuotes,      [`「`, `」`],                ];
    const ON_TWITTER          = [" on Twitter:",           " в Твиттере:",           " en Twitter:",                       " 在 Twitter:",      "さんはTwitterを使っています", ];
    const TWITTER             = ["Twitter",                "Твиттер",                "Twitter",                            "Twitter",          "Twitter",                  ];

    const lang = document.querySelector("html").getAttribute("lang");
    const langIndex = SUPPORTED_LANGUAGES.indexOf(lang);

    return {
        SUPPORTED_LANGUAGES,
        VIEW: VIEW[langIndex],
        YES_VIEW_PROFILE: YES_VIEW_PROFILE[langIndex],
        SIGNUP: SIGNUP[langIndex],
        TRENDS: TRENDS[langIndex],
        TOPICS_TO_FOLLOW: TOPICS_TO_FOLLOW[langIndex],
        WHO_TO_FOLLOW: WHO_TO_FOLLOW[langIndex],
        FOOTER: FOOTER[langIndex],
        QUOTES: QUOTES[langIndex],
        ON_TWITTER: ON_TWITTER[langIndex],
        TWITTER: TWITTER[langIndex],
        IMAGE: IMAGE[langIndex],
        SHOW_NUDITY: SHOW_NUDITY[langIndex],
    }
}

// --- Twitter.Tweet --- //
function hoistTweet() {
    class Tweet {
        constructor({elem, url}) {
            if (url) {
                this.elem = null;
                this.url = url;
            } else {
                this.elem = elem;
                this.url = Tweet.getUrl(elem);
            }
        }

        static of(innerElem) {
            // Workaround for media from a quoted tweet
            const url = innerElem.closest(`a[href^="/"]`)?.href;
            if (url && url.includes("/status/")) {
                return new Tweet({url});
            }

            const elem = innerElem.closest(`[data-testid="tweet"]`);
            if (!elem) { // opened image
                verbose && console.log("no-tweet elem");
            }
            return new Tweet({elem});
        }

        static getUrl(elem) {
            if (!elem) { // if opened image
                return location.href;
            }

            const tweetAnchor = [...elem.querySelectorAll("a")].find(el => {
                return el.childNodes[0]?.nodeName === "TIME";
            });

            if (tweetAnchor) {
                return tweetAnchor.href;
            }
            // else if selected tweet
            return location.href;
        }

        get author() {
            console.log("_____________URL: " + this.url);
            return this.url.match(/(?<=x\.com\/).+?(?=\/)/)?.[0];
        }

        get id() {
            return this.url.match(/(?<=\/status\/)\d+/)?.[0];
        }
    }

    return Tweet;
}

// --- Twitter.API --- //
function hoistAPI() {
    class API {
        static guestToken = getCookie("gt");
        static csrfToken  = getCookie("ct0");  // todo: lazy — not available at the first run
        // Guest/Suspended account Bearer token
        static guestAuthorization = "Bearer AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs%3D1Zv7ttfk8LF81IUq16cHjhLTvJu4FA33AGWWjCpTnA";

        // Seems to be outdated at 2022.05
        static async _requestBearerToken() {
            const scriptSrc = [...document.querySelectorAll("script")]
                .find(el => el.src.match(/https:\/\/abs\.twimg\.com\/responsive-web\/client-web\/main[\w.]*\.js/)).src;

            let text;
            try {
                text = await (await fetch(scriptSrc)).text();
            } catch (e) {
                console.error(e, scriptSrc);
                throw e;
            }

            const authorizationKey = text.match(/(?<=")AAAAAAAAAAAAAAAAAAAAANRILgAAAAAAnNwIzUejRCOuH5E6I8xnZz4puTs%3D.+?(?=")/)[0];
            const authorization = `Bearer ${authorizationKey}`;

            return authorization;
        }

        static async getAuthorization() {
            if (!API.authorization) {
                API.authorization = await API._requestBearerToken();
            }
            return API.authorization;
        }

        static async apiRequest(url) {
            const _url = url.toString();
            console.log("[ujs][apiRequest]", _url);

            // Hm... it is always the same. Even for a logged user.
            // const authorization = API.guestToken ? API.guestAuthorization : await API.getAuthorization();
            const authorization = API.guestAuthorization;

            // for debug
            verbose && sessionStorage.setItem("guestAuthorization", API.guestAuthorization);
            verbose && sessionStorage.setItem("authorization", API.authorization);
            verbose && sessionStorage.setItem("x-csrf-token", API.csrfToken);
            verbose && sessionStorage.setItem("x-guest-token", API.guestToken);

            const headers = new Headers({
                authorization,
                "x-csrf-token": API.csrfToken,
                "x-twitter-client-language": "en",
                "x-twitter-active-user": "yes"
            });
            if (API.guestToken) {
                headers.append("x-guest-token", API.guestToken);
            } else { // may be skipped
                headers.append("x-twitter-auth-type", "OAuth2Session");
            }

            let json;
            try {
                //const response = await fetch(_url, {headers});
                const response = await fetch(_url, {headers});
                json = await response.json();
                //console.log("_____________[apiRequest]" + JSON.stringify(json, null, 2));
            } catch (e) {
                console.error(e, _url);
                throw e;
            }

            //console.log("____JSON: " + JSON.stringify(json, null, 2));

            // verbose && console.log("[ujs][apiRequest]", JSON.stringify(json, null, " "));
            // 429 - [{code: 88, message: "Rate limit exceeded"}] — for suspended accounts

            return json;
        }

        static async getAuthorName(button)
        {
            let status_id = Tweet.of(button).id;
            //console.log("___getAuthorName status_id " + status_id);
            let url = ' https://x.com/i/api/2/timeline/conversation/' + status_id + '.json?tweet_mode=extended&include_entities=false&include_user_entities=false';
            //console.log("___getAuthorName url " + url);
            const json = await API.apiRequest(url);
            //console.log("___JSON " + JSON.stringify(json, null, 2));

            let tweet = json.globalObjects.tweets[status_id];
            let user = json.globalObjects.users[tweet.user_id_str];
            let invalid_chars = {'\\': '\', '\/': '/', '\|': '|', '<': '<', '>': '>', ':': ':', '*': '*', '?': '?', '"': '"', '\u200b': '', '\u200c': '', '\u200d': '', '\u2060': '', '\ufeff': '', '🔞': ''};

            let authorName = user.name.replace(/([\\/|*?:"]|[\u200b-\u200d\u2060\ufeff]|🔞)/g, v => invalid_chars[v]);

            console.log("___authorName : " + authorName);
            return authorName;
        }

        // @return {bitrate, content_type, url, vidNumber, authorName}
        static async getVideoInfo(tweetId, screenName, posterUrl) {
            console.log("___getVideoInfo");
            const url = API.createVideoEndpointUrl(tweetId);

            console.log('cute url  = ' + url);
            const json = await API.apiRequest(url);

            const instruction = json.data.threaded_conversation_with_injections_v2.instructions.find(ins => ins.type === "TimelineAddEntries");
            const tweetEntry = instruction.entries.find(ins => ins.entryId === "tweet-" + tweetId);
            const tweetResult = tweetEntry.content.itemContent.tweet_results.result
            // important
            let tweetData = tweetResult.legacy;

            const isVideoInQuotedPost = !tweetData.extended_entities || tweetData.extended_entities.media.findIndex(e => e.media_url_https === posterUrl) === -1;
            if (tweetData.quoted_status_id_str && isVideoInQuotedPost) {
                const tweetDataQuoted     = tweetResult.quoted_status_result.result.legacy;
                const tweetDataQuotedCore = tweetResult.quoted_status_result.result.core.user_results.result.legacy;

                tweetId = tweetData.quoted_status_id_str;
                screenName = tweetDataQuotedCore.screen_name;
                tweetData = tweetDataQuoted;
                console.leg("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
            }

            // types: "photo", "video", "animated_gif"

            let vidNumber = tweetData.extended_entities.media
                .filter(e => e.type !== "photo")
                .findIndex(e => e.media_url_https === posterUrl);

            let mediaIndex = tweetData.extended_entities.media
                .findIndex(e => e.media_url_https === posterUrl);

            if (vidNumber === -1 || mediaIndex === -1) {
                verbose && console.log("[ujs][warning]: vidNumber === -1 || mediaIndex === -1");
                vidNumber = 0;
                mediaIndex = 0;
            }
            const videoVariants = tweetData.extended_entities.media[mediaIndex].video_info.variants;
            verbose && console.log("[getVideoInfo]", videoVariants);

            const video = videoVariants
                .filter(el => el.bitrate !== undefined) // if content_type: "application/x-mpegURL" // .m3u8
                .reduce((acc, cur) => cur.bitrate > acc.bitrate ? cur : acc);

            if (!video) {
                throw new Error("No video URL");
            }

            let authorName = json.data.threaded_conversation_with_injections_v2.instructions[0].entries[0].content.itemContent.tweet_results.result.core.user_results.result.legacy.name;
            console.log("___authorName: " + authorName);
            return {video, tweetId, screenName, vidNumber, authorName};
        }

        static async getTweetJson(tweetId) {
            const url = API.createTweetJsonEndpointUrl(tweetId);
            const json = await API.apiRequest(url);
            verbose && console.log("[ujs][getTweetJson]", json, JSON.stringify(json));
            return json;
        }

        /** return {tweetResult, tweetLegacy, tweetUser} */
        static parseTweetJson(json, tweetId) {
            const instruction = json.data.threaded_conversation_with_injections_v2.instructions.find(ins => ins.type === "TimelineAddEntries");
            const tweetEntry  = instruction.entries.find(ins => ins.entryId === "tweet-" + tweetId);
            let tweetResult = tweetEntry.content.itemContent.tweet_results.result; // {"__typename": "Tweet"} // or {"__typename": "TweetWithVisibilityResults", tweet: {...}} (1641596499351212033)
            if (tweetResult.tweet) {
                tweetResult = tweetResult.tweet;
            }
            verbose && console.log("[ujs][parseTweetJson] tweetResult", tweetResult, JSON.stringify(tweetResult));
            const tweetUser   = tweetResult.core.user_results.result; // {"__typename": "User"}
            const tweetLegacy = tweetResult.legacy;
            verbose && console.log("[ujs][parseTweetJson] tweetLegacy", tweetLegacy, JSON.stringify(tweetLegacy));
            verbose && console.log("[ujs][parseTweetJson] tweetUser", tweetUser, JSON.stringify(tweetUser));
            return {tweetResult, tweetLegacy, tweetUser};
        }

        /**
         * @typedef {Object} TweetMediaEntry
         * @property {string} screen_name - "kreamu"
         * @property {string} tweet_id - "1687962620173733890"
         * @property {string} download_url - "https://pbs.twimg.com/media/FWYvXNMXgAA7se2?format=jpg&name=orig"
         * @property {"photo" | "video"} type - "photo"
         * @property {"photo" | "video" | "animated_gif"} type_original - "photo"
         * @property {number} index - 0
         * @property {number} type_index - 0
         * @property {number} type_index_original - 0
         * @property {string} preview_url - "https://pbs.twimg.com/media/FWYvXNMXgAA7se2.jpg"
         * @property {string} media_id  -   "1687949851516862464"
         * @property {string} media_key - "7_1687949851516862464"
         * @property {string} expanded_url - "https://twitter.com/kreamu/status/1687962620173733890/video/1"
         * @property {string} short_expanded_url - "pic.twitter.com/KeXR8T910R"
         * @property {string} short_tweet_url - "https://t.co/KeXR8T910R"
         * @property {string} tweet_text - "Tracer providing some In-flight entertainment"
         */
        /** @returns {TweetMediaEntry[]} */
        static parseTweetLegacyMedias(tweetResult, tweetLegacy, tweetUser) {
            if (!tweetLegacy.extended_entities || !tweetLegacy.extended_entities.media) {
                return [];
            }

            const medias = [];
            const typeIndex = {}; // "photo", "video", "animated_gif"
            let index = -1;

            for (const media of tweetLegacy.extended_entities.media) {
                index++;
                let   type          = media.type;
                const type_original = media.type;
                typeIndex[type] = (typeIndex[type] === undefined ? -1 : typeIndex[type]) + 1;
                if (type === "animated_gif") {
                    type = "video";
                    typeIndex[type] = (typeIndex[type] === undefined ? -1 : typeIndex[type]) + 1;
                }

                let download_url;
                if (media.video_info) {
                    const videoInfo = media.video_info.variants
                        .filter(el => el.bitrate !== undefined) // if content_type: "application/x-mpegURL" // .m3u8
                        .reduce((acc, cur) => cur.bitrate > acc.bitrate ? cur : acc);
                    download_url = videoInfo.url;
                } else {
                    if (media.media_url_https.includes("?format=")) {
                        download_url = media.media_url_https;
                    } else {
                        // "https://pbs.twimg.com/media/FWYvXNMXgAA7se2.jpg" -> "https://pbs.twimg.com/media/FWYvXNMXgAA7se2?format=jpg&name=orig"
                        const parts = media.media_url_https.split(".");
                        const ext = parts[parts.length - 1];
                        const urlPart = parts.slice(0, -1).join(".");
                        download_url = `${urlPart}?format=${ext}&name=orig`;
                    }
                }

                const screen_name   = tweetUser.legacy.screen_name;              // "kreamu"
                const tweet_id      = tweetResult.rest_id || tweetLegacy.id_str; // "1687962620173733890"

                const type_index          = typeIndex[type];          // 0
                const type_index_original = typeIndex[type_original]; // 0

                const preview_url = media.media_url_https; // "https://pbs.twimg.com/ext_tw_video_thumb/1687949851516862464/pu/img/mTBjwz--nylYk5Um.jpg"
                const media_id    = media.id_str;          //   "1687949851516862464"
                const media_key   = media.media_key;       // "7_1687949851516862464"

                const expanded_url       = media.expanded_url; // "https://twitter.com/kreamu/status/1687962620173733890/video/1"
                const short_expanded_url = media.display_url;  // "pic.twitter.com/KeXR8T910R"
                const short_tweet_url    = media.url;          // "https://t.co/KeXR8T910R"
                const tweet_text = tweetLegacy.full_text       // "Tracer providing some In-flight entertainment https://t.co/KeXR8T910R"
                                              .replace(` ${media.url}`, "");

                // {screen_name, tweet_id, download_url, preview_url, type_index}
                /** @type {TweetMediaEntry} */
                const mediaEntry = {
                    screen_name, tweet_id,
                    download_url, type, type_original, index,
                    type_index, type_index_original,
                    preview_url, media_id, media_key,
                    expanded_url, short_expanded_url, short_tweet_url, tweet_text,
                };
                medias.push(mediaEntry);
            }

            verbose && console.log("[ujs][parseTweetLegacyMedias] medias", medias);
            return medias;
        }

        static async getTweetMedias(tweetId) {
            const tweetJson = await API.getTweetJson(tweetId);
            const {tweetResult, tweetLegacy, tweetUser} = API.parseTweetJson(tweetJson, tweetId);

            let result = API.parseTweetLegacyMedias(tweetResult, tweetLegacy, tweetUser);

            if (tweetResult.quoted_status_result && tweetResult.quoted_status_result.result /* check is the qouted tweet not deleted */) {
                const tweetResultQuoted = tweetResult.quoted_status_result.result;
                const tweetLegacyQuoted = tweetResultQuoted.legacy;
                const tweetUserQuoted   = tweetResultQuoted.core.user_results.result;
                result = [...result, ...API.parseTweetLegacyMedias(tweetResultQuoted, tweetLegacyQuoted, tweetUserQuoted)];
            }
            return result;
        }

        // todo: keep `queryId` updated
        static TweetDetailQueryId      = "VwKJcAd7zqlBOitPLUrB8A"; // TweetDetail      (for videos)
        static UserByScreenNameQueryId = "qW5u-DAuXpMEG0zA1F7UGQ"; // UserByScreenName (for the direct user profile url)

        static createVideoEndpointUrl(tweetId) {
            const variables = {
                "focalTweetId": tweetId,
                "with_rux_injections": false,
                "includePromotedContent": true,
                "withCommunity": true,
                "withQuickPromoteEligibilityTweetFields": true,
                "withBirdwatchNotes": true,
                "withVoice": true,
                "withV2Timeline": true
            };
            const features = {
                "rweb_lists_timeline_redesign_enabled": true,
                "responsive_web_graphql_exclude_directive_enabled": true,
                "verified_phone_label_enabled": false,
                "creator_subscriptions_tweet_preview_api_enabled": true,
                "responsive_web_graphql_timeline_navigation_enabled": true,
                "responsive_web_graphql_skip_user_profile_image_extensions_enabled": false,
                "tweetypie_unmention_optimization_enabled": true,
                "responsive_web_edit_tweet_api_enabled": true,
                "graphql_is_translatable_rweb_tweet_is_translatable_enabled": true,
                "view_counts_everywhere_api_enabled": true,
                "longform_notetweets_consumption_enabled": true,
                "responsive_web_twitter_article_tweet_consumption_enabled": false,
                "tweet_awards_web_tipping_enabled": false,
                "freedom_of_speech_not_reach_fetch_enabled": true,
                "standardized_nudges_misinfo": true,
                "tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled": true,
                "longform_notetweets_rich_text_read_enabled": true,
                "longform_notetweets_inline_media_enabled": true,
                "responsive_web_media_download_video_enabled": false,
                "responsive_web_enhance_cards_enabled": false
            };
            const fieldToggles = {
                "withArticleRichContentState": false
            };

            const urlBase = `https://twitter.com/i/api/graphql/${API.TweetDetailQueryId}/TweetDetail`;
            const urlObj = new URL(urlBase);
            urlObj.searchParams.set("variables", JSON.stringify(variables));
            urlObj.searchParams.set("features", JSON.stringify(features));
            urlObj.searchParams.set("fieldToggles", JSON.stringify(fieldToggles));
            const url = urlObj.toString();
            return url;
        }

        static createTweetJsonEndpointUrl(tweetId) {
            const variables = {
                "focalTweetId": tweetId,
                "with_rux_injections": true,
                "includePromotedContent": true,
                "withCommunity": true,
                "withQuickPromoteEligibilityTweetFields": true,
                "withBirdwatchNotes": true,
                "withVoice": true,
                "withV2Timeline": true
            };
            const features = {
                "rweb_tipjar_consumption_enabled": true,
                "responsive_web_graphql_exclude_directive_enabled": true,
                "verified_phone_label_enabled": false,
                "creator_subscriptions_tweet_preview_api_enabled": true,
                "responsive_web_graphql_timeline_navigation_enabled": true,
                "responsive_web_graphql_skip_user_profile_image_extensions_enabled": false,
                "communities_web_enable_tweet_community_results_fetch": true,
                "c9s_tweet_anatomy_moderator_badge_enabled": true,
                "articles_preview_enabled": true,
                "tweetypie_unmention_optimization_enabled": true,
                "responsive_web_edit_tweet_api_enabled": true,
                "graphql_is_translatable_rweb_tweet_is_translatable_enabled": true,
                "view_counts_everywhere_api_enabled": true,
                "longform_notetweets_consumption_enabled": true,
                "responsive_web_twitter_article_tweet_consumption_enabled": true,
                "tweet_awards_web_tipping_enabled": false,
                "creator_subscriptions_quote_tweet_preview_enabled": false,
                "freedom_of_speech_not_reach_fetch_enabled": true,
                "standardized_nudges_misinfo": true,
                "tweet_with_visibility_results_prefer_gql_limited_actions_policy_enabled": true,
                "rweb_video_timestamps_enabled": true,
                "longform_notetweets_rich_text_read_enabled": true,
                "longform_notetweets_inline_media_enabled": true,
                "responsive_web_enhance_cards_enabled": false
            };
            const fieldToggles = {
                "withArticleRichContentState": true,
                "withArticlePlainText": false,
                "withGrokAnalyze": false
            };

            const urlBase = `https://${sitename}.com/i/api/graphql/${API.TweetDetailQueryId}/TweetDetail`;
            const urlObj = new URL(urlBase);
            urlObj.searchParams.set("variables", JSON.stringify(variables));
            urlObj.searchParams.set("features", JSON.stringify(features));
            urlObj.searchParams.set("fieldToggles", JSON.stringify(fieldToggles));
            const url = urlObj.toString();
            return url;
        }

        static async getUserInfo(username) {
            const variables = {
                "screen_name": username,
                "withSafetyModeUserFields": true,
            };
            const features = {
                "creator_subscriptions_tweet_preview_api_enabled": true,
                "hidden_profile_likes_enabled": true,
                "hidden_profile_subscriptions_enabled": true,
                "highlights_tweets_tab_ui_enabled": true,
                "responsive_web_graphql_exclude_directive_enabled": true,
                "responsive_web_graphql_skip_user_profile_image_extensions_enabled": false,
                "responsive_web_graphql_timeline_navigation_enabled": true,
                "responsive_web_twitter_article_notes_tab_enabled": true,
                "rweb_tipjar_consumption_enabled": true,
                "subscriptions_verification_info_is_identity_verified_enabled": true,
                "subscriptions_verification_info_verified_since_enabled": true,
                "verified_phone_label_enabled": false,
            };
            const fieldToggles = {
                "withAuxiliaryUserLabels": false,
            };

            const urlBase = `https://${sitename}.com/i/api/graphql/${API.UserByScreenNameQueryId}/UserByScreenName?`;
            const urlObj = new URL(urlBase);
            urlObj.searchParams.set("variables", JSON.stringify(variables));
            urlObj.searchParams.set("features", JSON.stringify(features));
            urlObj.searchParams.set("fieldToggles", JSON.stringify(fieldToggles));
            const url = urlObj.toString();

            const json = await API.apiRequest(url);
            verbose && console.log("[ujs][getUserInfo][json]", json);
            return json.data.user.result.legacy.entities.url?.urls[0].expanded_url;
        }
    }

    return API;
}

function getHistoryHelper() {
    function migrateLocalStore() {
        // 2023.07.05 // todo: uncomment after two+ months
        // Currently I disable it for cases if some browser's tabs uses the old version of the script.
        // const migrated = localStorage.getItem(StorageNames.migrated);
        // if (migrated === "true") {
        //     return;
        // }

        const newToOldNameMap = [
            [StorageNames.settings,                StorageNamesOld.settings],
            [StorageNames.settingsImageHistoryBy,  StorageNamesOld.settingsImageHistoryBy],
            [StorageNames.downloadedImageNames,    StorageNamesOld.downloadedImageNames],
            [StorageNames.downloadedImageTweetIds, StorageNamesOld.downloadedImageTweetIds],
            [StorageNames.downloadedVideoTweetIds, StorageNamesOld.downloadedVideoTweetIds],
        ];

        /**
         * @param {string} newName
         * @param {string} oldName
         * @param {string} value
         */
        function setValue(newName, oldName, value) {
            try {
                localStorage.setItem(newName, value);
            } catch (err) {
                localStorage.removeItem(oldName); // if there is no space ("exceeded the quota")
                localStorage.setItem(newName, value);
            }
            localStorage.removeItem(oldName);
        }

        function mergeOldWithNew({newName, oldName}) {
            const oldValueStr = localStorage.getItem(oldName);
            if (oldValueStr === null) {
                return;
            }
            const newValueStr = localStorage.getItem(newName);
            if (newValueStr === null) {
                setValue(newName, oldName, oldValueStr);
                return;
            }
            try {
                const oldValue = JSON.parse(oldValueStr);
                const newValue = JSON.parse(newValueStr);
                if (Array.isArray(oldValue) && Array.isArray(newValue)) {
                    const resultArray = [...new Set([...newValue, ...oldValue])];
                    const resultArrayStr = JSON.stringify(resultArray);
                    setValue(newName, oldName, resultArrayStr);
                }
            } catch (err) {
                // return;
            }
        }

        for (const [newName, oldName] of newToOldNameMap) {
            mergeOldWithNew({newName, oldName});
        }
        // localStorage.setItem(StorageNames.migrated, "true");
    }

    function exportHistory(onDone) {
        const exportObject = [
            StorageNames.settings,
            StorageNames.settingsImageHistoryBy,
            StorageNames.downloadedImageNames,    // only if "settingsImageHistoryBy" === "IMAGE_NAME" (by default)
            StorageNames.downloadedImageTweetIds, // only if "settingsImageHistoryBy" === "TWEET_ID" (need to set manually with DevTools)
            StorageNames.downloadedVideoTweetIds,
        ].reduce((acc, name) => {
            const valueStr = localStorage.getItem(name);
            if (valueStr === null) {
                return acc;
            }
            let value = JSON.parse(valueStr);
            if (Array.isArray(value)) {
                value = [...new Set(value)];
            }
            acc[name] = value;
            return acc;
        }, {});
        const browserName = localStorage.getItem(StorageNames.browserName) || getBrowserName();
        const browserLine = browserName ? "-" + browserName : "";

        downloadBlob(new Blob([toLineJSON(exportObject, true)]), `ujs-twitter-click-n-save-export-${dateToDayDateString(new Date())}${browserLine}.json`);
        onDone();
    }

    function verify(jsonObject) {
        if (Array.isArray(jsonObject)) {
            throw new Error("Wrong object! JSON contains an array.");
        }
        if (Object.keys(jsonObject).some(key => !key.startsWith("ujs-twitter-click-n-save"))) {
            throw new Error("Wrong object! The keys should start with 'ujs-twitter-click-n-save'.");
        }
    }

    function importHistory(onDone, onError) {
        const importInput = document.createElement("input");
        importInput.type = "file";
        importInput.accept = "application/json";
        importInput.style.display = "none";
        document.body.prepend(importInput);
        importInput.addEventListener("change", async _event => {
            let json;
            try {
                json = JSON.parse(await importInput.files[0].text());
                verify(json);

                Object.entries(json).forEach(([key, value]) => {
                    if (Array.isArray(value)) {
                        value = [...new Set(value)];
                    }
                    localStorage.setItem(key, JSON.stringify(value));
                });
                onDone();
            } catch (err) {
                onError(err);
            } finally {
                await sleep(1000);
                importInput.remove();
            }
        });
        importInput.click();
    }

    function mergeHistory(onDone, onError) { // Only merges arrays
        const mergeInput = document.createElement("input");
        mergeInput.type = "file";
        mergeInput.accept = "application/json";
        mergeInput.style.display = "none";
        document.body.prepend(mergeInput);
        mergeInput.addEventListener("change", async _event => {
            let json;
            try {
                json = JSON.parse(await mergeInput.files[0].text());
                verify(json);
                Object.entries(json).forEach(([key, value]) => {
                    if (!Array.isArray(value)) {
                        return;
                    }
                    const existedValue = JSON.parse(localStorage.getItem(key));
                    if (Array.isArray(existedValue)) {
                        const resultValue = [...new Set([...existedValue, ...value])];
                        localStorage.setItem(key, JSON.stringify(resultValue));
                    } else {
                        localStorage.setItem(key, JSON.stringify(value));
                    }
                });
                onDone();
            } catch (err) {
                onError(err);
            } finally {
                await sleep(1000);
                mergeInput.remove();
            }
        });
        mergeInput.click();
    }

    return {exportHistory, importHistory, mergeHistory, migrateLocalStore};
}

// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------
// --- Common Utils --- //

// --- LocalStorage util class --- //
function hoistLS(settings = {}) {
    const {
        verbose, // debug "messages" in the document.title
    } = settings;

    class LS {
        constructor(name) {
            this.name = name;
        }
        getItem(defaultValue) {
            return LS.getItem(this.name, defaultValue);
        }
        setItem(value) {
            LS.setItem(this.name, value);
        }
        removeItem() {
            LS.removeItem(this.name);
        }
        async pushItem(value) {  // array method
            await LS.pushItem(this.name, value);
        }
        async popItem(value) {   // array method
            await LS.popItem(this.name, value);
        }
        hasItem(value) {         // array method
            return LS.hasItem(this.name, value);
        }

        static getItem(name, defaultValue) {
            const value = localStorage.getItem(name);
            if (value === undefined) {
                return undefined;
            }
            if (value === null) { // when there is no such item
                LS.setItem(name, defaultValue);
                return defaultValue;
            }
            return JSON.parse(value);
        }
        static setItem(name, value) {
            localStorage.setItem(name, JSON.stringify(value));
        }
        static removeItem(name) {
            localStorage.removeItem(name);
        }
        static async pushItem(name, value) {
            const array = LS.getItem(name, []);
            array.push(value);
            LS.setItem(name, array);

            //sanity check
            await sleep(50);
            if (!LS.hasItem(name, value)) {
                if (verbose) {
                    document.title = "🟥" + document.title;
                }
                await LS.pushItem(name, value);
            }
        }
        static async popItem(name, value) { // remove from an array
            const array = LS.getItem(name, []);
            if (array.indexOf(value) !== -1) {
                array.splice(array.indexOf(value), 1);
                LS.setItem(name, array);

                //sanity check
                await sleep(50);
                if (LS.hasItem(name, value)) {
                    if (verbose) {
                        document.title = "🟨" + document.title;
                    }
                    await LS.popItem(name, value);
                }
            }
        }
        static hasItem(name, value) { // has in array
            const array = LS.getItem(name, []);
            return array.indexOf(value) !== -1;
        }
    }

    return LS;
}

// --- Just groups them in a function for the convenient code looking --- //
function getUtils({verbose}) {
    function sleep(time) {
        return new Promise(resolve => setTimeout(resolve, time));
    }

    async function fetchResource(url, onProgress = props => console.log(props)) {
        try {
            let response = await fetch(url, {
                // cache: "force-cache",
            });
            const lastModifiedDateSeconds = response.headers.get("last-modified");
            const contentType = response.headers.get("content-type");

            const lastModifiedDate = dateToDayDateString(lastModifiedDateSeconds);
            const extension = contentType ? extensionFromMime(contentType) : null;

            if (onProgress) {
                response = responseProgressProxy(response, onProgress);
            }

            const blob = await response.blob();

            // https://pbs.twimg.com/media/AbcdEFgijKL01_9?format=jpg&name=orig                                     -> AbcdEFgijKL01_9
            // https://pbs.twimg.com/ext_tw_video_thumb/1234567890123456789/pu/img/Ab1cd2345EFgijKL.jpg?name=orig   -> Ab1cd2345EFgijKL.jpg
            // https://video.twimg.com/ext_tw_video/1234567890123456789/pu/vid/946x720/Ab1cd2345EFgijKL.mp4?tag=10  -> Ab1cd2345EFgijKL.mp4
            const _url = new URL(url);
            const {filename} = (_url.origin + _url.pathname).match(/(?<filename>[^\/]+$)/).groups;

            const {name} = filename.match(/(?<name>^[^.]+)/).groups;
            return {blob, lastModifiedDate, contentType, extension, name};
        } catch (error) {
            verbose && console.error("[fetchResource]", url, error);
            throw error;
        }
    }

    function extensionFromMime(mimeType) {
        let extension = mimeType.match(/(?<=\/).+/)[0];
        extension = extension === "jpeg" ? "jpg" : extension;
        return extension;
    }

    // the original download url will be posted as hash of the blob url, so you can check it in the download manager's history
    function downloadBlob(blob, name, url) {
        const anchor = document.createElement("a");
        anchor.setAttribute("download", name || "");
        const blobUrl = URL.createObjectURL(blob);
        anchor.href = blobUrl + (url ? ("#" + url) : "");
        anchor.click();
        setTimeout(() => URL.revokeObjectURL(blobUrl), 30000);
    }

    // "Sun, 10 Jan 2021 22:22:22 GMT" -> "2021.01.10"
    function dateToDayDateString(dateValue, utc = true) {
        const _date = new Date(dateValue);
        function pad(str) {
            return str.toString().padStart(2, "0");
        }
        const _utc = utc ? "UTC" : "";
        const year  = _date[`get${_utc}FullYear`]();
        const month = _date[`get${_utc}Month`]() + 1;
        const date  = _date[`get${_utc}Date`]();

        return year + "." + pad(month) + "." + pad(date);
    }

    function addCSS(css) {
        const styleElem = document.createElement("style");
        styleElem.textContent = css;
        document.body.append(styleElem);
        return styleElem;
    }

    function getCookie(name) {
        verbose && console.log(document.cookie);
        const regExp = new RegExp(`(?<=${name}=)[^;]+`);
        return document.cookie.match(regExp)?.[0];
    }

    function throttle(runnable, time = 50) {
        let waiting = false;
        let queued = false;
        let context;
        let args;

        return function() {
            if (!waiting) {
                waiting = true;
                setTimeout(function() {
                    if (queued) {
                        runnable.apply(context, args);
                        context = args = undefined;
                    }
                    waiting = queued = false;
                }, time);
                return runnable.apply(this, arguments);
            } else {
                queued = true;
                context = this;
                args = arguments;
            }
        }
    }

    function throttleWithResult(func, time = 50) {
        let waiting = false;
        let args;
        let context;
        let timeout;
        let promise;

        return async function() {
            if (!waiting) {
                waiting = true;
                timeout = new Promise(async resolve => {
                    await sleep(time);
                    waiting = false;
                    resolve();
                });
                return func.apply(this, arguments);
            } else {
                args = arguments;
                context = this;
            }

            if (!promise) {
                promise = new Promise(async resolve => {
                    await timeout;
                    const result = func.apply(context, args);
                    args = context = promise = undefined;
                    resolve(result);
                });
            }
            return promise;
        }
    }

    function xpath(path, node = document) {
        let xPathResult = document.evaluate(path, node, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
        return xPathResult.singleNodeValue;
    }
    function xpathAll(path, node = document) {
        let xPathResult = document.evaluate(path, node, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
        const nodes = [];
        try {
            let node = xPathResult.iterateNext();

            while (node) {
                nodes.push(node);
                node = xPathResult.iterateNext();
            }
            return nodes;
        } catch (e) {
            // todo need investigate it
            console.error(e); // "The document has mutated since the result was returned."
            return [];
        }
    }

    const identityContentEncodings = new Set([null, "identity", "no encoding"]);
    function getOnProgressProps(response) {
        const {headers, status, statusText, url, redirected, ok} = response;
        const isIdentity = identityContentEncodings.has(headers.get("Content-Encoding"));
        const compressed = !isIdentity;
        const _contentLength = parseInt(headers.get("Content-Length")); // `get()` returns `null` if no header present
        const contentLength = isNaN(_contentLength) ? null : _contentLength;
        const lengthComputable = isIdentity && _contentLength !== null;

        // Original XHR behaviour; in TM it equals to `contentLength`, or `-1` if `contentLength` is `null` (and `0`?).
        const total = lengthComputable ? contentLength : 0;
        const gmTotal = contentLength > 0 ? contentLength : -1; // Like `total` is in TM and GM.

        return {
            gmTotal, total, lengthComputable,
            compressed, contentLength,
            headers, status, statusText, url, redirected, ok
        };
    }
    function responseProgressProxy(response, onProgress) {
        const onProgressProps = getOnProgressProps(response);
        let loaded = 0;
        const reader = response.body.getReader();
        const readableStream = new ReadableStream({
            async start(controller) {
                while (true) {
                    const {done, /** @type {Uint8Array} */ value} = await reader.read();
                    if (done) {
                        break;
                    }
                    loaded += value.length;
                    try {
                        onProgress({loaded, ...onProgressProps});
                    } catch (e) {
                        console.error("[onProgress]:", e);
                    }
                    controller.enqueue(value);
                }
                controller.close();
                reader.releaseLock();
            },
            cancel() {
                void reader.cancel();
            }
        });
        return new ResponseEx(readableStream, response);
    }
    class ResponseEx extends Response {
        [Symbol.toStringTag] = "ResponseEx";

        constructor(body, {headers, status, statusText, url, redirected, type}) {
            super(body, {
                status, statusText, headers: {
                    ...headers,
                    "content-type": headers.get("content-type").split("; ")[0] // Fixes Blob type ("text/html; charset=UTF-8") in TM
                }
            });
            this._type = type;
            this._url = url;
            this._redirected = redirected;
            this._headers = headers; // `HeadersLike` is more user-friendly for debug than the original `Headers` object
        }
        get redirected() { return this._redirected; }
        get url() { return this._url; }
        get type() { return this._type || "basic"; }
        /** @returns {HeadersLike} */
        get headers() { return this._headers; }
    }

    function toLineJSON(object, prettyHead = false) {
        let result = "{\n";
        const entries = Object.entries(object);
        const length = entries.length;
        if (prettyHead && length > 0) {
            result += `"${entries[0][0]}":${JSON.stringify(entries[0][1], null, " ")}`;
            if (length > 1) {
                result += `,\n\n`;
            }
        }
        for (let i = 1; i < length - 1; i++) {
            result += `"${entries[i][0]}":${JSON.stringify(entries[i][1])},\n`;
        }
        if (length > 0 && !prettyHead || length > 1) {
            result += `"${entries[length - 1][0]}":${JSON.stringify(entries[length - 1][1])}`;
        }
        result += `\n}`;
        return result;
    }

    const isFirefox = navigator.userAgent.toLowerCase().indexOf("firefox") !== -1;

    function getBrowserName() {
        const userAgent = window.navigator.userAgent.toLowerCase();
        return userAgent.indexOf("edge") > -1 ? "edge-legacy"
            : userAgent.indexOf("edg") > -1 ? "edge"
            : userAgent.indexOf("opr") > -1 && !!window.opr ? "opera"
            : userAgent.indexOf("chrome") > -1 && !!window.chrome ? "chrome"
            : userAgent.indexOf("firefox") > -1 ? "firefox"
            : userAgent.indexOf("safari") > -1 ? "safari"
            : "";
    }

    function removeSearchParams(url) {
        const urlObj = new URL(url);
        const keys = []; // FF + VM fix // Instead of [...urlObj.searchParams.keys()]
        urlObj.searchParams.forEach((v, k) => { keys.push(k); });
        for (const key of keys) {
            urlObj.searchParams.delete(key);
        }
        return urlObj.toString();
    }

    return {
        sleep, fetchResource, extensionFromMime, downloadBlob, dateToDayDateString,
        addCSS,
        getCookie,
        throttle, throttleWithResult,
        xpath, xpathAll,
        responseProgressProxy,
        toLineJSON,
        isFirefox,
        getBrowserName,
        removeSearchParams,
    }
}

// ---------------------------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------------------------