YouTube: Add Channel Name to Shorts Thumbnail

To add channel name to Shorts thumbnail
目前為 2023-07-04 提交的版本，檢視最新版本。
安裝腳本 ?
Wrap lines
/*
 
MIT License
 
Copyright 2023 CY Fung
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 
*/
// ==UserScript==
// @name         YouTube: Add Channel Name to Shorts Thumbnail
// @namespace    UserScript
// @match        https://www.youtube.com/*
// @grant        none
// @version      0.1.7
// @license      MIT License
// @author       CY Fung
// @description  To add channel name to Shorts thumbnail
// @require      https://gf.qytechs.cn/scripts/465819-api-for-customelements-in-youtube/code/API%20for%20CustomElements%20in%20YouTube.js?version=1215161
// @run-at       document-start
// ==/UserScript==
 
 
((__CONTEXT__) => {
 
  const { Promise, fetch } = __CONTEXT__;
 
  class Mutex {
 
    constructor() {
      this.p = Promise.resolve()
    }
 
    /**
     *  @param {(lockResolve: () => void)} f
     */
    lockWith(f) {
      this.p = this.p.then(() => new Promise(f).catch(console.warn))
    }
 
  }
 
 
  customYtElements.whenRegistered('ytd-rich-grid-slim-media', (proto) => {
 
    const mutex = new Mutex();
 
    const resolvedValues = new Map();
 
    Promise.resolve().then(() => {
 
      if (document.querySelector('style#ePCWh')) return;
 
 
      let style = document.createElement('style')
      style.id = 'ePCWh'
      style.textContent = `
 
#metadata-line[ePCWh]::before {
    width: 100%;
    content: attr(ePCWh);
    display: block;
    max-width: 100%;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}
`;
      document.head.appendChild(style);
 
    });
 
    const createPromise = (videoId) => {
 
      return new Promise(resolve => {
 
        mutex.lockWith(lockResolve => {
 
          fetch(`/watch?v=${videoId}`, {
 
            "method": "GET",
            "mode": "same-origin",
            "credentials": "omit",
            referrerPolicy: "no-referrer",
            cache: "default",
            redirect: "error", // there shall be no redirection in this API request
            integrity: "",
            keepalive: false,
 
            "headers": {
              "Cache-Control": "public, max-age=900, stale-while-revalidate=1800",
              // refer "Cache-Control Use Case Examples" in https://www.koyeb.com/blog/using-cache-control-and-cdns-to-improve-performance-and-reduce-latency
              // seems YouTube RSS Feeds server insists its own Cache-Control.
 
              // "Content-Type": "text/xml; charset=UTF-8",
              "Accept-Encoding": "gzip, deflate, br", // YouTube Response - gzip
              // X-Youtube-Bootstrap-Logged-In: false,
              // X-Youtube-Client-Name: 1, // INNERTUBE_CONTEXT_CLIENT_NAME
              // X-Youtube-Client-Version: "2.20230622.06.00" // INNERTUBE_CONTEXT_CLIENT_VERSION
 
              "Accept": "text/html",
              "Pragma": ""
            }
 
          }).then(res => {
            lockResolve();
            return res.text();
          }).then(resText => {
 
            let wIdx2 = resText.indexOf('itemprop="author"');
            let wIdx1 = wIdx2 > 0 ? resText.lastIndexOf('<span', wIdx2) : -1;
            let wIdx3 = wIdx1 > 0 ? resText.indexOf('<\/span>', wIdx2) : -1;
            if (wIdx3 > 0) {
 
              let mText = resText.substring(wIdx1, wIdx3 + '<\/span>'.length);
              let template = document.createElement('template');
              template.innerHTML = mText;
              let span = template.content.firstElementChild;
              if (span && span.nodeName === "SPAN") {
                let name = span.querySelector('link[itemprop="name"]')
                if (name) {
                  name = name.getAttribute('content');
                  if (name) {
                    return name;
                  }
                }
              }
              template.innerHTML = '';
            }
 
            return '';
 
          }).then(resolve);
 
        })
 
      });
 
    };
 
    proto.onDataChanged = ((onDataChanged) => {
 
      return function () {
        let nameToAdd = '';
        const data = this.data;
        if (data && data.videoType === "REEL_VIDEO_TYPE_VIDEO" && typeof data.videoId === 'string') {
          const videoId = data.videoId;
          if (data.rsVideoId === videoId && typeof data.rsChannelName === 'string') {
            nameToAdd = data.rsChannelName;
          } else {
            let promise = resolvedValues.get(videoId);
            if (!promise) {
              promise = createPromise(videoId);
              resolvedValues.set(videoId, promise);
            }
            promise.then(name => {
              this.data = Object.assign({}, this.data, { rsVideoId: videoId, rsChannelName: name });
            });
          }
        }
 
        let ml = HTMLElement.prototype.querySelector.call(this, 'ytd-rich-grid-slim-media #details #metadata-line');
        if (ml) {
          if (nameToAdd) {
            ml.setAttribute('ePCWh', nameToAdd);
          } else if (ml.hasAttribute('ePCWh')) {
            ml.removeAttribute('ePCWh');
          }
        }
 
        return onDataChanged.apply(this, arguments);
      };
 
    })(proto.onDataChanged)
 
  });
 
})({ Promise, fetch });
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