Youtube - Fix channel links in sidebar recommendations

Fixes the channel links for the "Up next" and recommended videos below it on youtube.
当前为 2024-01-17 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Youtube - Fix channel links in sidebar recommendations
// @namespace    1N07
// @version      0.7.2
// @description  Fixes the channel links for the "Up next" and recommended videos below it on youtube.
// @author       1N07
// @license      unlicense
// @icon         https://www.google.com/s2/favicons?domain=youtube.com
// @match        https://www.youtube.com/*
// @require      https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
// @require      https://update.gf.qytechs.cn/scripts/12036/70722/Mutation%20Summary.js
// @grant        GM_registerMenuCommand
// @grant        GM_unregisterMenuCommand
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_addStyle
// @compatible   firefox Compatible with: Tampermonkey, Violentmonkey
// @compatible   firefox Not compatible with: Greasemonkey, FireMonkey
// @compatible   chrome Latest version untested, but likely works with at least Tampermonkey
// @compatible   opera Latest version untested, but likely works with at least Tampermonkey
// @compatible   edge Latest version untested, but likely works with at least Tampermonkey
// @compatible   safari Latest version untested, but likely works with at least Tampermonkey
// ==/UserScript==

(function() {
    'use strict';

    var videoSectionOption;
    var videoSection = GM_getValue("videoSection", true);
    SetVidSecOption();

    GM_addStyle(`
		ytd-compact-video-renderer .channel-link-blocker:hover ~ a #text.ytd-channel-name {
			text-decoration: underline;
		}
		.channel-link-blocker-parent
		{
			position: relative;
		}
		.channel-link-blocker
		{
			display: inline-block;
			position: absolute;
			width: 100%;
			height: 25px;
			background-color: rgba(255, 25, 25, 0);
			top: 32px;
			left: 0;
			z-index: 2019;
		}
	`);

    var perVideoObservers = [];
    var perVideoObserverIndexTally = 0;

    var containerObserver = new MutationSummary({
        callback: (containerSummary) => {
            //console.log("%cContainer Observer triggered - Added: " + containerSummary[0].added.length + ", Removed: " + containerSummary[0].removed.length + ", Reparented: " + containerSummary[0].reparented.length, "color: green");

            //On video added
            containerSummary[0].added.forEach(vid => {
                //add blocker element
                const blockerParent = $(vid).find(".metadata.ytd-compact-video-renderer");
                blockerParent.addClass("channel-link-blocker-parent");
                blockerParent.prepend(`<a class="channel-link-blocker" href="#"></a>`);
                const channelLink = $(blockerParent).find(".channel-link-blocker");

                UpdateBlockerPositioning(channelLink);
                UpdateUrl(vid, channelLink);

                //add observer id to element so we can clean up the right observer when the element is later removed
                $(vid).attr("data-active-observer-id", perVideoObserverIndexTally);

                //Add per-video observer for when the video href changes, so we can update the channel link accordingly. Doing this because apparently these days YT just swaps the data in the elements without swapping the elements themselves.
                //Also put the observer in an array with an access key for later access
                perVideoObservers.push({
                    key: perVideoObserverIndexTally,
                    observer: new MutationSummary({
                        callback: (vidSummary) => {
                            //console.log("%cPer Video Observer triggered: href changed", "color: green");

                            UpdateBlockerPositioning(channelLink);
                            UpdateUrl(vid, channelLink);
                        },
                        rootNode: $(blockerParent).find("a[href^='/watch']")[0],
                        queries: [{attribute: "href"}]
                    })
                });
                perVideoObserverIndexTally++;
            });

            //on removed
            containerSummary[0].removed.forEach(vid => {
                //get the observer id/key we stored in the element previously
                const id = $(vid).data("activeObserverId");
                //console.log("%cAttempting to remove observer: " + id, "color: red");
                if(id !== undefined) {
                    //console.log("id valid");
                    //get the observer from the observer array with the key
                    const index = perVideoObservers.findIndex(o => o.key === id);
                    if(index > -1) {
                        //console.log("observer found");
                        //disconnect the observer and remove it from the array
                        perVideoObservers[index].observer.disconnect();
                        perVideoObservers.splice(index, 1);
                        //console.log("%cRemoved observer: " + id, "color: red");
                    }
                }
            });

            //console.log("%cObservers alive: ", "color: yellow");
            //console.log(perVideoObservers.map(x => x.key));
        },
        queries: [{element: "ytd-compact-video-renderer.ytd-item-section-renderer, ytd-compact-video-renderer.ytd-watch-next-secondary-results-renderer"}]
    });



    function UpdateBlockerPositioning(blocker) {
        //blocker position adjustment
        $(blocker).prop("style", "top: " + $(blocker).parent().find("a[href^='/watch'] > h3").height() + "px;");
        //above adjustment appears to rarely and randomly fail. Attempted fix by delaying adjustment as perhaps the height hasn't been computed yet?
        setTimeout(() => { $(blocker).prop("style", "top: " + $(blocker).parent().find("a[href^='/watch'] > h3").height() + "px;") }, 1000);
    }

    function UpdateUrl(fromElem, toElem) {
        //get data source object from element. Newest source used by YT is .polymerController, but older sources that may still be in use if certain flags are in place include .inst or just the element itself
        const getVideoDataSource = o => o ? (o.polymerController || o.inst || o || 0) : (o || 0);

        let channelHandle = getVideoDataSource(fromElem)?.data?.longBylineText?.runs?.find(el => el.navigationEndpoint?.browseEndpoint?.canonicalBaseUrl?.match(/^\/(@|channel)/))?.navigationEndpoint.browseEndpoint.canonicalBaseUrl;
        if(channelHandle?.length) {
            $(toElem).prop("href", channelHandle + (videoSection ? "/videos" : ""));
        } else {
            console.log("Failed to get channel url");
            $(toElem).on("click", (e) => {
                e.preventDefault();
                e.stopPropagation();
                alert("'Youtube - Fix channel links in sidebar recommendations' failed to get the channel link for this video for some reason. If this happens consistently, please report it at greasyfork.");
            });
        }
    }

    function SetVidSecOption() {
        GM_unregisterMenuCommand(videoSectionOption);
        videoSectionOption = GM_registerMenuCommand("Fix channel links- videos section (" + (videoSection ? "yes" : "no") + ") -click to change-", function(){
            videoSection = !videoSection;
            GM_setValue("videoSection", videoSection);
            SetVidSecOption();
        });
    }
})();
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