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Return YouTube Dislike

Return of the YouTube Dislike, Based off https://www.returnyoutubedislike.com/

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// ==UserScript==
// @name         Return YouTube Dislike
// @namespace    https://www.returnyoutubedislike.com/
// @homepage     https://www.returnyoutubedislike.com/
// @version      3.1.5
// @encoding     utf-8
// @description  Return of the YouTube Dislike, Based off https://www.returnyoutubedislike.com/
// @icon         https://github.com/Anarios/return-youtube-dislike/raw/main/Icons/Return%20Youtube%20Dislike%20-%20Transparent.png
// @author       Anarios & JRWR
// @match        *://*.youtube.com/*
// @exclude      *://music.youtube.com/*
// @exclude      *://*.music.youtube.com/*
// @compatible   chrome
// @compatible   firefox
// @compatible   opera
// @compatible   safari
// @compatible   edge
// @grant        GM.xmlHttpRequest
// @connect      youtube.com
// @grant        GM_addStyle
// @run-at       document-end
// ==/UserScript==

const extConfig = {
  // BEGIN USER OPTIONS
  // You may change the following variables to allowed values listed in the corresponding brackets (* means default). Keep the style and keywords intact.
  showUpdatePopup: false, // [true, false*] Show a popup tab after extension update (See what's new)
  disableVoteSubmission: false, // [true, false*] Disable like/dislike submission (Stops counting your likes and dislikes)
  disableLogging: true, // [true*, false] Disable Logging API Response in JavaScript Console.
  coloredThumbs: false, // [true, false*] Colorize thumbs (Use custom colors for thumb icons)
  coloredBar: false, // [true, false*] Colorize ratio bar (Use custom colors for ratio bar)
  colorTheme: "classic", // [classic*, accessible, neon] Color theme (red/green, blue/yellow, pink/cyan)
  numberDisplayFormat: "compactShort", // [compactShort*, compactLong, standard] Number format (For non-English locale users, you may be able to improve appearance with a different option. Please file a feature request if your locale is not covered)
  numberDisplayRoundDown: true, // [true*, false] Round down numbers (Show rounded down numbers)
  tooltipPercentageMode: "none", // [none*, dash_like, dash_dislike, both, only_like, only_dislike] Mode of showing percentage in like/dislike bar tooltip.
  numberDisplayReformatLikes: false, // [true, false*] Re-format like numbers (Make likes and dislikes format consistent)
  rateBarEnabled: false, // [true, false*] Enables ratio bar under like/dislike buttons
  // END USER OPTIONS
};

const LIKED_STATE = "LIKED_STATE";
const DISLIKED_STATE = "DISLIKED_STATE";
const NEUTRAL_STATE = "NEUTRAL_STATE";
let previousState = 3; //1=LIKED, 2=DISLIKED, 3=NEUTRAL
let likesvalue = 0;
let dislikesvalue = 0;
let preNavigateLikeButton = null;

let isMobile = location.hostname == "m.youtube.com";
let isShorts = () => location.pathname.startsWith("/shorts");
let mobileDislikes = 0;
function cLog(text, subtext = "") {
  if (!extConfig.disableLogging) {
    subtext = subtext.trim() === "" ? "" : `(${subtext})`; 
    console.log(`[Return YouTube Dislikes] ${text} ${subtext}`); 
  }
}

function isInViewport(element) {
  const rect = element.getBoundingClientRect();
  const height = innerHeight || document.documentElement.clientHeight;
  const width = innerWidth || document.documentElement.clientWidth;
  return (
    // When short (channel) is ignored, the element (like/dislike AND short itself) is
    // hidden with a 0 DOMRect. In this case, consider it outside of Viewport
    !(rect.top == 0 && rect.left == 0 && rect.bottom == 0 && rect.right == 0) &&
    rect.top >= 0 &&
    rect.left >= 0 &&
    rect.bottom <= height &&
    rect.right <= width
  );
}

function getButtons() {
  if (isShorts()) {
    let elements = document.querySelectorAll(
      isMobile ? "ytm-like-button-renderer" : "#like-button > ytd-like-button-renderer",
    );
    for (let element of elements) {
      if (isInViewport(element)) {
        return element;
      }
    }
  }
  if (isMobile) {
    return (
      document.querySelector(".slim-video-action-bar-actions .segmented-buttons") ??
      document.querySelector(".slim-video-action-bar-actions")
    );
  }
  if (document.getElementById("menu-container")?.offsetParent === null) {
    return (
      document.querySelector("ytd-menu-renderer.ytd-watch-metadata > div") ??
      document.querySelector("ytd-menu-renderer.ytd-video-primary-info-renderer > div")
    );
  } else {
    return document.getElementById("menu-container")?.querySelector("#top-level-buttons-computed");
  }
}

function getDislikeButton() {
  if (getButtons().children[0].tagName === "YTD-SEGMENTED-LIKE-DISLIKE-BUTTON-RENDERER") {
    if (getButtons().children[0].children[1] === undefined) {
      return document.querySelector("#segmented-dislike-button");
    } else {
      return getButtons().children[0].children[1];
    }
  } else {
    if (getButtons().querySelector("segmented-like-dislike-button-view-model")) {
      const dislikeViewModel = getButtons().querySelector("dislike-button-view-model");
      if (!dislikeViewModel) cLog("Dislike button wasn't added to DOM yet...");
      return dislikeViewModel;
    } else {
      return getButtons().children[1];
    }
  }
}

function getLikeButton() {
  return getButtons().children[0].tagName === "YTD-SEGMENTED-LIKE-DISLIKE-BUTTON-RENDERER"
    ? document.querySelector("#segmented-like-button") !== null
      ? document.querySelector("#segmented-like-button")
      : getButtons().children[0].children[0]
    : getButtons().querySelector("like-button-view-model") ?? getButtons().children[0];
}

function getLikeTextContainer() {
  return (
    getLikeButton().querySelector("#text") ??
    getLikeButton().getElementsByTagName("yt-formatted-string")[0] ??
    getLikeButton().querySelector("span[role='text']")
  );
}

function getDislikeTextContainer() {
  const dislikeButton = getDislikeButton();
  let result =
    dislikeButton?.querySelector("#text") ??
    dislikeButton?.getElementsByTagName("yt-formatted-string")[0] ??
    dislikeButton?.querySelector("span[role='text']");
  if (result === null) {
    let textSpan = document.createElement("span");
    textSpan.id = "text";
    textSpan.style.marginLeft = "6px";
    dislikeButton?.querySelector("button").appendChild(textSpan);
    if (dislikeButton) dislikeButton.querySelector("button").style.width = "auto";
    result = textSpan;
  }
  return result;
}

function createObserver(options, callback) {
  const observerWrapper = new Object();
  observerWrapper.options = options;
  observerWrapper.observer = new MutationObserver(callback);
  observerWrapper.observe = function (element) {
    this.observer.observe(element, this.options);
  };
  observerWrapper.disconnect = function () {
    this.observer.disconnect();
  };
  return observerWrapper;
}

let shortsObserver = null;

if (isShorts() && !shortsObserver) {
  cLog("Initializing shorts mutation observer");
  shortsObserver = createObserver(
    {
      attributes: true,
    },
    (mutationList) => {
      mutationList.forEach((mutation) => {
        if (
          mutation.type === "attributes" &&
          mutation.target.nodeName === "TP-YT-PAPER-BUTTON" &&
          mutation.target.id === "button"
        ) {
          cLog("Short thumb button status changed");
          if (mutation.target.getAttribute("aria-pressed") === "true") {
            mutation.target.style.color =
              mutation.target.parentElement.parentElement.id === "like-button"
                ? getColorFromTheme(true)
                : getColorFromTheme(false);
          } else {
            mutation.target.style.color = "unset";
          }
          return;
        }
        cLog("Unexpected mutation observer event: " + mutation.target + mutation.type);
      });
    },
  );
}

function isVideoLiked() {
  if (isMobile) {
    return getLikeButton().querySelector("button").getAttribute("aria-label") == "true";
  }
  return getLikeButton().classList.contains("style-default-active");
}

function isVideoDisliked() {
  if (isMobile) {
    return getDislikeButton()?.querySelector("button").getAttribute("aria-label") == "true";
  }
  return getDislikeButton()?.classList.contains("style-default-active");
}

function isVideoNotLiked() {
  if (isMobile) {
    return !isVideoLiked();
  }
  return getLikeButton().classList.contains("style-text");
}

function isVideoNotDisliked() {
  if (isMobile) {
    return !isVideoDisliked();
  }
  return getDislikeButton()?.classList.contains("style-text");
}

function checkForUserAvatarButton() {
  if (isMobile) {
    return;
  }
  if (document.querySelector("#avatar-btn")) {
    return true;
  } else {
    return false;
  }
}

function getState() {
  if (isVideoLiked()) {
    return LIKED_STATE;
  }
  if (isVideoDisliked()) {
    return DISLIKED_STATE;
  }
  return NEUTRAL_STATE;
}

function setLikes(likesCount) {
  if (isMobile) {
    getButtons().children[0].querySelector(".button-renderer-text").innerText = likesCount;
    return;
  }
  getLikeTextContainer().innerText = likesCount;
}

function setDislikes(dislikesCount) {
  if (isMobile) {
    mobileDislikes = dislikesCount;
    return;
  }

  const _container = getDislikeTextContainer();
  _container?.removeAttribute("is-empty");
  if (_container?.innerText !== dislikesCount) {
    _container.innerText = dislikesCount;
  }
}

function getLikeCountFromButton() {
  try {
    if (isShorts()) {
      //Youtube Shorts don't work with this query. It's not necessary; we can skip it and still see the results.
      //It should be possible to fix this function, but it's not critical to showing the dislike count.
      return false;
    }
    let likeButton =
      getLikeButton().querySelector("yt-formatted-string#text") ?? getLikeButton().querySelector("button");

    let likesStr = likeButton.getAttribute("aria-label").replace(/\D/g, "");
    return likesStr.length > 0 ? parseInt(likesStr) : false;
  } catch {
    return false;
  }
}

(typeof GM_addStyle != "undefined"
  ? GM_addStyle
  : (styles) => {
      let styleNode = document.createElement("style");
      styleNode.type = "text/css";
      styleNode.innerText = styles;
      document.head.appendChild(styleNode);
    })(`
    #return-youtube-dislike-bar-container {
      background: var(--yt-spec-icon-disabled);
      border-radius: 2px;
    }

    #return-youtube-dislike-bar {
      background: var(--yt-spec-text-primary);
      border-radius: 2px;
      transition: all 0.15s ease-in-out;
    }

    .ryd-tooltip {
      position: absolute;
      display: block;
      height: 2px;
      bottom: -10px;
    }

    .ryd-tooltip-bar-container {
      width: 100%;
      height: 2px;
      position: absolute;
      padding-top: 6px;
      padding-bottom: 12px;
      top: -6px;
    }

    ytd-menu-renderer.ytd-watch-metadata {
      overflow-y: visible !important;
    }
    
    #top-level-buttons-computed {
      position: relative !important;
    }
  `);

function createRateBar(likes, dislikes) {
  if (isMobile || !extConfig.rateBarEnabled) {
    return;
  }
  let rateBar = document.getElementById("return-youtube-dislike-bar-container");

  const widthPx = getLikeButton().clientWidth + (getDislikeButton()?.clientWidth ?? 52);

  const widthPercent = likes + dislikes > 0 ? (likes / (likes + dislikes)) * 100 : 50;

  var likePercentage = parseFloat(widthPercent.toFixed(1));
  const dislikePercentage = (100 - likePercentage).toLocaleString();
  likePercentage = likePercentage.toLocaleString();

  var tooltipInnerHTML;
  switch (extConfig.tooltipPercentageMode) {
    case "dash_like":
      tooltipInnerHTML = `${likes.toLocaleString()}&nbsp;/&nbsp;${dislikes.toLocaleString()}&nbsp;&nbsp;-&nbsp;&nbsp;${likePercentage}%`;
      break;
    case "dash_dislike":
      tooltipInnerHTML = `${likes.toLocaleString()}&nbsp;/&nbsp;${dislikes.toLocaleString()}&nbsp;&nbsp;-&nbsp;&nbsp;${dislikePercentage}%`;
      break;
    case "both":
      tooltipInnerHTML = `${likePercentage}%&nbsp;/&nbsp;${dislikePercentage}%`;
      break;
    case "only_like":
      tooltipInnerHTML = `${likePercentage}%`;
      break;
    case "only_dislike":
      tooltipInnerHTML = `${dislikePercentage}%`;
      break;
    default:
      tooltipInnerHTML = `${likes.toLocaleString()}&nbsp;/&nbsp;${dislikes.toLocaleString()}`;
  }

  if (!rateBar && !isMobile) {
    let colorLikeStyle = "";
    let colorDislikeStyle = "";
    if (extConfig.coloredBar) {
      colorLikeStyle = "; background-color: " + getColorFromTheme(true);
      colorDislikeStyle = "; background-color: " + getColorFromTheme(false);
    }

    getButtons().insertAdjacentHTML(
      "beforeend",
      `
        <div class="ryd-tooltip" style="width: ${widthPx}px">
        <div class="ryd-tooltip-bar-container">
           <div
              id="return-youtube-dislike-bar-container"
              style="width: 100%; height: 2px;${colorDislikeStyle}"
              >
              <div
                 id="return-youtube-dislike-bar"
                 style="width: ${widthPercent}%; height: 100%${colorDislikeStyle}"
                 ></div>
           </div>
        </div>
        <tp-yt-paper-tooltip position="top" id="ryd-dislike-tooltip" class="style-scope ytd-sentiment-bar-renderer" role="tooltip" tabindex="-1">
           <!--css-build:shady-->${tooltipInnerHTML}
        </tp-yt-paper-tooltip>
        </div>
`,
    );
    let descriptionAndActionsElement = document.getElementById("top-row");
    descriptionAndActionsElement.style.borderBottom = "1px solid var(--yt-spec-10-percent-layer)";
    descriptionAndActionsElement.style.paddingBottom = "10px";
  } else {
    document.querySelector(".ryd-tooltip").style.width = widthPx + "px";
    document.getElementById("return-youtube-dislike-bar").style.width = widthPercent + "%";

    if (extConfig.coloredBar) {
      document.getElementById("return-youtube-dislike-bar-container").style.backgroundColor = getColorFromTheme(false);
      document.getElementById("return-youtube-dislike-bar").style.backgroundColor = getColorFromTheme(true);
    }
  }
}

function setState() {
  cLog("Fetching votes...");
  let statsSet = false;

  fetch(`https://returnyoutubedislikeapi.com/votes?videoId=${getVideoId()}`).then((response) => {
    response.json().then((json) => {
      if (json && !("traceId" in response) && !statsSet) {
        const { dislikes, likes } = json;
        cLog(`Received count: ${dislikes}`);
        likesvalue = likes;
        dislikesvalue = dislikes;
        setDislikes(numberFormat(dislikes));
        if (extConfig.numberDisplayReformatLikes === true) {
          const nativeLikes = getLikeCountFromButton();
          if (nativeLikes !== false) {
            setLikes(numberFormat(nativeLikes));
          }
        }
        createRateBar(likes, dislikes);
        if (extConfig.coloredThumbs === true) {
          const dislikeButton = getDislikeButton();
          if (isShorts()) {
            // for shorts, leave deactived buttons in default color
            const shortLikeButton = getLikeButton().querySelector("tp-yt-paper-button#button");
            const shortDislikeButton = dislikeButton?.querySelector("tp-yt-paper-button#button");
            if (shortLikeButton.getAttribute("aria-pressed") === "true") {
              shortLikeButton.style.color = getColorFromTheme(true);
            }
            if (shortDislikeButton && shortDislikeButton.getAttribute("aria-pressed") === "true") {
              shortDislikeButton.style.color = getColorFromTheme(false);
            }
            shortsObserver.observe(shortLikeButton);
            shortsObserver.observe(shortDislikeButton);
          } else {
            getLikeButton().style.color = getColorFromTheme(true);
            if (dislikeButton) dislikeButton.style.color = getColorFromTheme(false);
          }
        }
      }
    });
  });
}

function updateDOMDislikes() {
  setDislikes(numberFormat(dislikesvalue));
  createRateBar(likesvalue, dislikesvalue);
}

function likeClicked() {
  if (checkForUserAvatarButton() == true) {
    if (previousState == 1) {
      likesvalue--;
      updateDOMDislikes();
      previousState = 3;
    } else if (previousState == 2) {
      likesvalue++;
      dislikesvalue--;
      updateDOMDislikes();
      previousState = 1;
    } else if (previousState == 3) {
      likesvalue++;
      updateDOMDislikes();
      previousState = 1;
    }
    if (extConfig.numberDisplayReformatLikes === true) {
      const nativeLikes = getLikeCountFromButton();
      if (nativeLikes !== false) {
        setLikes(numberFormat(nativeLikes));
      }
    }
  }
}

function dislikeClicked() {
  if (checkForUserAvatarButton() == true) {
    if (previousState == 3) {
      dislikesvalue++;
      updateDOMDislikes();
      previousState = 2;
    } else if (previousState == 2) {
      dislikesvalue--;
      updateDOMDislikes();
      previousState = 3;
    } else if (previousState == 1) {
      likesvalue--;
      dislikesvalue++;
      updateDOMDislikes();
      previousState = 2;
      if (extConfig.numberDisplayReformatLikes === true) {
        const nativeLikes = getLikeCountFromButton();
        if (nativeLikes !== false) {
          setLikes(numberFormat(nativeLikes));
        }
      }
    }
  }
}

function setInitialState() {
  setState();
}

function getVideoId() {
  const urlObject = new URL(window.location.href);
  const pathname = urlObject.pathname;
  if (pathname.startsWith("/clip")) {
    return (document.querySelector("meta[itemprop='videoId']") || document.querySelector("meta[itemprop='identifier']")).content;
  } else {
    if (pathname.startsWith("/shorts")) {
      return pathname.slice(8);
    }
    return urlObject.searchParams.get("v");
  }
}

function isVideoLoaded() {
  if (isMobile) {
    return document.getElementById("player").getAttribute("loading") == "false";
  }
  const videoId = getVideoId();

  return (
    // desktop: spring 2024 UI
    document.querySelector(`ytd-watch-grid[video-id='${videoId}']`) !== null ||
    // desktop: older UI
    document.querySelector(`ytd-watch-flexy[video-id='${videoId}']`) !== null ||
    // mobile: no video-id attribute
    document.querySelector('#player[loading="false"]:not([hidden])') !== null
  );
}

function roundDown(num) {
  if (num < 1000) return num;
  const int = Math.floor(Math.log10(num) - 2);
  const decimal = int + (int % 3 ? 1 : 0);
  const value = Math.floor(num / 10 ** decimal);
  return value * 10 ** decimal;
}

function numberFormat(numberState) {
  let numberDisplay;
  if (extConfig.numberDisplayRoundDown === false) {
    numberDisplay = numberState;
  } else {
    numberDisplay = roundDown(numberState);
  }
  return getNumberFormatter(extConfig.numberDisplayFormat).format(numberDisplay);
}

function getNumberFormatter(optionSelect) {
  let userLocales;
  if (document.documentElement.lang) {
    userLocales = document.documentElement.lang;
  } else if (navigator.language) {
    userLocales = navigator.language;
  } else {
    try {
      userLocales = new URL(
        Array.from(document.querySelectorAll("head > link[rel='search']"))
          ?.find((n) => n?.getAttribute("href")?.includes("?locale="))
          ?.getAttribute("href"),
      )?.searchParams?.get("locale");
    } catch {
      cLog("Cannot find browser locale. Use en as default for number formatting.");
      userLocales = "en";
    }
  }

  let formatterNotation;
  let formatterCompactDisplay;
  switch (optionSelect) {
    case "compactLong":
      formatterNotation = "compact";
      formatterCompactDisplay = "long";
      break;
    case "standard":
      formatterNotation = "standard";
      formatterCompactDisplay = "short";
      break;
    case "compactShort":
    default:
      formatterNotation = "compact";
      formatterCompactDisplay = "short";
  }

  const formatter = Intl.NumberFormat(userLocales, {
    notation: formatterNotation,
    compactDisplay: formatterCompactDisplay,
  });
  return formatter;
}

function getColorFromTheme(voteIsLike) {
  let colorString;
  switch (extConfig.colorTheme) {
    case "accessible":
      if (voteIsLike === true) {
        colorString = "dodgerblue";
      } else {
        colorString = "gold";
      }
      break;
    case "neon":
      if (voteIsLike === true) {
        colorString = "aqua";
      } else {
        colorString = "magenta";
      }
      break;
    case "classic":
    default:
      if (voteIsLike === true) {
        colorString = "lime";
      } else {
        colorString = "red";
      }
  }
  return colorString;
}

let smartimationObserver = null;

function setEventListeners(evt) {
  let jsInitChecktimer;

  function checkForJS_Finish() {
    //console.log();
    if (isShorts() || (getButtons()?.offsetParent && isVideoLoaded())) {
      const buttons = getButtons();
      const dislikeButton = getDislikeButton();

      if (preNavigateLikeButton !== getLikeButton() && dislikeButton) {
        cLog("Registering button listeners...");
        try {
          getLikeButton().addEventListener("click", likeClicked);
          dislikeButton?.addEventListener("click", dislikeClicked);
          getLikeButton().addEventListener("touchstart", likeClicked);
          dislikeButton?.addEventListener("touchstart", dislikeClicked);
          dislikeButton?.addEventListener("focusin", updateDOMDislikes);
          dislikeButton?.addEventListener("focusout", updateDOMDislikes);
          preNavigateLikeButton = getLikeButton();

          if (!smartimationObserver) {
            smartimationObserver = createObserver(
              {
                attributes: true,
                subtree: true,
                childList: true,
              },
              updateDOMDislikes,
            );
            smartimationObserver.container = null;
          }

          const smartimationContainer = buttons.querySelector("yt-smartimation");
          if (smartimationContainer && smartimationObserver.container != smartimationContainer) {
            cLog("Initializing smartimation mutation observer");
            smartimationObserver.disconnect();
            smartimationObserver.observe(smartimationContainer);
            smartimationObserver.container = smartimationContainer;
          }
        } catch {
          return;
        } //Don't spam errors into the console
      }
      if (dislikeButton) {
        setInitialState();
        clearInterval(jsInitChecktimer);
      }
    }
  }

  cLog("Setting up...");
  jsInitChecktimer = setInterval(checkForJS_Finish, 111);
}

(function () {
  "use strict";
  window.addEventListener("yt-navigate-finish", setEventListeners, true);
  setEventListeners();
})();
if (isMobile) {
  let originalPush = history.pushState;
  history.pushState = function (...args) {
    window.returnDislikeButtonlistenersSet = false;
    setEventListeners(args[2]);
    return originalPush.apply(history, args);
  };
  setInterval(() => {
    const dislikeButton = getDislikeButton();
    if (dislikeButton?.querySelector(".button-renderer-text") === null) {
      getDislikeTextContainer().innerText = mobileDislikes;
    } else {
      if (dislikeButton) dislikeButton.querySelector(".button-renderer-text").innerText = mobileDislikes;
    }
  }, 1000);
}