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jerone / Github News Feed Filter

// ==UserScript==
// @name             Github News Feed Filter
// @namespace        https://github.com/jerone/UserScripts
// @description      Add filters for GitHub homepage news feed items
// @author           jerone
// @contributor      darkred
// @copyright        2014+, jerone (https://github.com/jerone)
// @license          CC-BY-NC-SA-4.0; https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
// @license          GPL-3.0-or-later; http://www.gnu.org/licenses/gpl-3.0.txt
// @homepage         https://github.com/jerone/UserScripts/tree/master/Github_News_Feed_Filter
// @homepageURL      https://github.com/jerone/UserScripts/tree/master/Github_News_Feed_Filter
// @downloadURL      https://github.com/jerone/UserScripts/raw/master/Github_News_Feed_Filter/Github_News_Feed_Filter.user.js
// @updateURL        https://github.com/jerone/UserScripts/raw/master/Github_News_Feed_Filter/Github_News_Feed_Filter.user.js
// @contributionURL  https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=VCYMHWQ7ZMBKW
// @icon             https://github.githubassets.com/pinned-octocat.svg
// @include          https://github.com/
// @include          https://github.com/?*
// @include          https://github.com/orgs/*/dashboard
// @include          https://github.com/orgs/*/dashboard?*
// @version          8.2.8
// @grant            none
// ==/UserScript==

// cSpell:ignore transform, osvg, opath, gollum, hovercards, profilecols
/* eslint security/detect-object-injection: "off" */

(function () {
	var ICONS = {};
	ICONS["octicon-book"] =
		"M3 5h4v1H3V5zm0 3h4V7H3v1zm0 2h4V9H3v1zm11-5h-4v1h4V5zm0 2h-4v1h4V7zm0 2h-4v1h4V9zm2-6v9c0 .55-.45 1-1 1H9.5l-1 1-1-1H2c-.55 0-1-.45-1-1V3c0-.55.45-1 1-1h5.5l1 1 1-1H15c.55 0 1 .45 1 1zm-8 .5L7.5 3H2v9h6V3.5zm7-.5H9.5l-.5.5V12h6V3z";
	ICONS["octicon-comment-discussion"] =
		"M15 1H6c-.55 0-1 .45-1 1v2H1c-.55 0-1 .45-1 1v6c0 .55.45 1 1 1h1v3l3-3h4c.55 0 1-.45 1-1V9h1l3 3V9h1c.55 0 1-.45 1-1V2c0-.55-.45-1-1-1zM9 11H4.5L3 12.5V11H1V5h4v3c0 .55.45 1 1 1h3v2zm6-3h-2v1.5L11.5 8H6V2h9v6z";
	ICONS["octicon-git-branch"] =
		"M10 5c0-1.11-.89-2-2-2a1.993 1.993 0 0 0-1 3.72v.3c-.02.52-.23.98-.63 1.38-.4.4-.86.61-1.38.63-.83.02-1.48.16-2 .45V4.72a1.993 1.993 0 0 0-1-3.72C.88 1 0 1.89 0 3a2 2 0 0 0 1 1.72v6.56c-.59.35-1 .99-1 1.72 0 1.11.89 2 2 2 1.11 0 2-.89 2-2 0-.53-.2-1-.53-1.36.09-.06.48-.41.59-.47.25-.11.56-.17.94-.17 1.05-.05 1.95-.45 2.75-1.25S8.95 7.77 9 6.73h-.02C9.59 6.37 10 5.73 10 5zM2 1.8c.66 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2C1.35 4.2.8 3.65.8 3c0-.65.55-1.2 1.2-1.2zm0 12.41c-.66 0-1.2-.55-1.2-1.2 0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2zm6-8c-.66 0-1.2-.55-1.2-1.2 0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2z";
	ICONS["octicon-git-branch-create"] = ICONS["octicon-git-branch"];
	ICONS["octicon-git-branch-delete"] = ICONS["octicon-git-branch"];
	ICONS["octicon-git-commit"] =
		"M10.86 7c-.45-1.72-2-3-3.86-3-1.86 0-3.41 1.28-3.86 3H0v2h3.14c.45 1.72 2 3 3.86 3 1.86 0 3.41-1.28 3.86-3H14V7h-3.14zM7 10.2c-1.22 0-2.2-.98-2.2-2.2 0-1.22.98-2.2 2.2-2.2 1.22 0 2.2.98 2.2 2.2 0 1.22-.98 2.2-2.2 2.2z";
	ICONS["octicon-home"] =
		"M16 9l-3-3V2h-2v2L8 1 0 9h2l1 5c0 .55.45 1 1 1h8c.55 0 1-.45 1-1l1-5h2zm-4 5H9v-4H7v4H4L2.81 7.69 8 2.5l5.19 5.19L12 14z";
	ICONS["octicon-issue-opened"] =
		"M7 2.3c3.14 0 5.7 2.56 5.7 5.7S10.14 13.7 7 13.7 1.3 11.14 1.3 8s2.56-5.7 5.7-5.7m0-1.3C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7S10.86 1 7 1z m1 3H6v5h2V4z m0 6H6v2h2V10z";
	ICONS["octicon-person"] =
		"M12 14.002a.998.998 0 0 1-.998.998H1.001A1 1 0 0 1 0 13.999V13c0-2.633 4-4 4-4s.229-.409 0-1c-.841-.62-.944-1.59-1-4 .173-2.413 1.867-3 3-3s2.827.586 3 3c-.056 2.41-.159 3.38-1 4-.229.59 0 1 0 1s4 1.367 4 4v1.002z";
	ICONS["octicon-organization"] =
		"M16 12.999c0 .439-.45 1-1 1H7.995c-.539 0-.994-.447-.995-.999H1c-.54 0-1-.561-1-1 0-2.634 3-4 3-4s.229-.409 0-1c-.841-.621-1.058-.59-1-3 .058-2.419 1.367-3 2.5-3s2.442.58 2.5 3c.058 2.41-.159 2.379-1 3-.229.59 0 1 0 1s1.549.711 2.42 2.088C9.196 9.369 10 8.999 10 8.999s.229-.409 0-1c-.841-.62-1.058-.59-1-3 .058-2.419 1.367-3 2.5-3s2.437.581 2.495 3c.059 2.41-.158 2.38-1 3-.229.59 0 1 0 1s3.005 1.366 3.005 4";
	ICONS["octicon-plus"] = "M12 9H7v5H5V9H0V7h5V2h2v5h5z";
	ICONS["octicon-radio-tower"] =
		"M4.79 6.11c.25-.25.25-.67 0-.92-.32-.33-.48-.76-.48-1.19 0-.43.16-.86.48-1.19.25-.26.25-.67 0-.92a.613.613 0 0 0-.45-.19c-.16 0-.33.06-.45.19-.57.58-.85 1.35-.85 2.11 0 .76.29 1.53.85 2.11.25.25.66.25.9 0zM2.33.52a.651.651 0 0 0-.92 0C.48 1.48.01 2.74.01 3.99c0 1.26.47 2.52 1.4 3.48.25.26.66.26.91 0s.25-.68 0-.94c-.68-.7-1.02-1.62-1.02-2.54 0-.92.34-1.84 1.02-2.54a.66.66 0 0 0 .01-.93zm5.69 5.1A1.62 1.62 0 1 0 6.4 4c-.01.89.72 1.62 1.62 1.62zM14.59.53a.628.628 0 0 0-.91 0c-.25.26-.25.68 0 .94.68.7 1.02 1.62 1.02 2.54 0 .92-.34 1.83-1.02 2.54-.25.26-.25.68 0 .94a.651.651 0 0 0 .92 0c.93-.96 1.4-2.22 1.4-3.48A5.048 5.048 0 0 0 14.59.53zM8.02 6.92c-.41 0-.83-.1-1.2-.3l-3.15 8.37h1.49l.86-1h4l.84 1h1.49L9.21 6.62c-.38.2-.78.3-1.19.3zm-.01.48L9.02 11h-2l.99-3.6zm-1.99 5.59l1-1h2l1 1h-4zm5.19-11.1c-.25.25-.25.67 0 .92.32.33.48.76.48 1.19 0 .43-.16.86-.48 1.19-.25.26-.25.67 0 .92a.63.63 0 0 0 .9 0c.57-.58.85-1.35.85-2.11 0-.76-.28-1.53-.85-2.11a.634.634 0 0 0-.9 0z";
	ICONS["octicon-repo"] =
		"M4 9H3V8h1v1zm0-3H3v1h1V6zm0-2H3v1h1V4zm0-2H3v1h1V2zm8-1v12c0 .55-.45 1-1 1H6v2l-1.5-1.5L3 16v-2H1c-.55 0-1-.45-1-1V1c0-.55.45-1 1-1h10c.55 0 1 .45 1 1zm-1 10H1v2h2v-1h3v1h5v-2zm0-10H2v9h9V1z";
	ICONS["octicon-repo-clone"] =
		"M15 0H9v7c0 .55.45 1 1 1h1v1h1V8h3c.55 0 1-.45 1-1V1c0-.55-.45-1-1-1zm-4 7h-1V6h1v1zm4 0h-3V6h3v1zm0-2h-4V1h4v4zM4 5H3V4h1v1zm0-2H3V2h1v1zM2 1h6V0H1C.45 0 0 .45 0 1v12c0 .55.45 1 1 1h2v2l1.5-1.5L6 16v-2h5c.55 0 1-.45 1-1v-3H2V1zm9 10v2H6v-1H3v1H1v-2h10zM3 8h1v1H3V8zm1-1H3V6h1v1z";
	ICONS["octicon-repo-create"] = ICONS["octicon-plus"];
	ICONS["octicon-repo-push"] =
		"M4 3H3V2h1v1zM3 5h1V4H3v1zm4 0L4 9h2v7h2V9h2L7 5zm4-5H1C.45 0 0 .45 0 1v12c0 .55.45 1 1 1h4v-1H1v-2h4v-1H2V1h9.02L11 10H9v1h2v2H9v1h2c.55 0 1-.45 1-1V1c0-.55-.45-1-1-1z";
	ICONS["octicon-repo-forked"] =
		"M8 1a1.993 1.993 0 0 0-1 3.72V6L5 8 3 6V4.72A1.993 1.993 0 0 0 2 1a1.993 1.993 0 0 0-1 3.72V6.5l3 3v1.78A1.993 1.993 0 0 0 5 15a1.993 1.993 0 0 0 1-3.72V9.5l3-3V4.72A1.993 1.993 0 0 0 8 1zM2 4.2C1.34 4.2.8 3.65.8 3c0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2zm3 10c-.66 0-1.2-.55-1.2-1.2 0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2zm3-10c-.66 0-1.2-.55-1.2-1.2 0-.65.55-1.2 1.2-1.2.65 0 1.2.55 1.2 1.2 0 .65-.55 1.2-1.2 1.2z";
	ICONS["octicon-repo-delete"] = ICONS["octicon-repo"];
	ICONS["octicon-repo-pull"] =
		"M13 8V6H7V4h6V2l3 3-3 3zM4 2H3v1h1V2zm7 5h1v6c0 .55-.45 1-1 1H6v2l-1.5-1.5L3 16v-2H1c-.55 0-1-.45-1-1V1c0-.55.45-1 1-1h10c.55 0 1 .45 1 1v2h-1V1H2v9h9V7zm0 4H1v2h2v-1h3v1h5v-2zM4 6H3v1h1V6zm0-2H3v1h1V4zM3 9h1V8H3v1z";
	ICONS["octicon-star"] =
		"M14 6l-4.9-.64L7 1 4.9 5.36 0 6l3.6 3.26L2.67 14 7 11.67 11.33 14l-.93-4.74z";
	ICONS["octicon-tag"] =
		"M7.73 1.73C7.26 1.26 6.62 1 5.96 1H3.5C2.13 1 1 2.13 1 3.5v2.47c0 .66.27 1.3.73 1.77l6.06 6.06c.39.39 1.02.39 1.41 0l4.59-4.59a.996.996 0 0 0 0-1.41L7.73 1.73zM2.38 7.09c-.31-.3-.47-.7-.47-1.13V3.5c0-.88.72-1.59 1.59-1.59h2.47c.42 0 .83.16 1.13.47l6.14 6.13-4.73 4.73-6.13-6.15zM3.01 3h2v2H3V3h.01z";
	ICONS["octicon-tag-add"] = ICONS["octicon-tag"];
	ICONS["octicon-tag-remove"] = ICONS["octicon-tag"];
	ICONS["octicon-triangle-left"] = "M6 2L0 8l6 6z";

	var ACTIONS = [
		{
			id: "*-action",
			text: "All news feed",
			icon: "octicon-radio-tower",
			classNames: ["*-action"],
		},
		{
			id: "issues",
			text: "Issues",
			icon: "octicon-issue-opened",
			classNames: ["issues_labeled"],
			subFilters: [
				{
					id: "issues labeled",
					text: "Labeled",
					icon: "octicon-tag",
					classNames: ["issues_labeled"],
				},
			],
		},
		{
			id: "commits",
			text: "Commits",
			icon: "octicon-git-commit",
			classNames: ["push", "commit_comment"],
			subFilters: [
				{
					id: "commits pushed",
					text: "Pushed",
					icon: "octicon-git-commit",
					classNames: ["push"],
				},
				{
					id: "commits comments",
					text: "Comments",
					icon: "octicon-comment-discussion",
					classNames: ["commit_comment"],
				},
			],
		},
		{
			id: "repo",
			text: "Repo",
			icon: "octicon-repo",
			classNames: [
				"repo",
				"create",
				"public",
				"fork",
				"branch_create",
				"branch_delete",
				"tag_add",
				"tag_remove",
				"release",
				"delete",
			],
			subFilters: [
				{
					id: "repo created",
					text: "Created",
					icon: "octicon-repo-create",
					classNames: ["repo", "create"],
				},
				{
					id: "repo public",
					text: "Public",
					icon: "octicon-repo-push",
					classNames: ["public"],
				},
				{
					id: "repo forked",
					text: "Forked",
					icon: "octicon-repo-forked",
					classNames: ["fork"],
				},
				{
					id: "repo deleted",
					text: "Deleted",
					icon: "octicon-repo-delete",
					classNames: ["delete"],
				},
				{
					id: "repo released",
					text: "Release",
					icon: "octicon-repo-pull",
					classNames: ["release"],
				},
				{
					id: "repo branched",
					text: "Branch",
					icon: "octicon-git-branch",
					classNames: ["branch_create", "branch_delete"],
					subFilters: [
						{
							id: "repo branch created",
							text: "Created",
							icon: "octicon-git-branch-create",
							classNames: ["branch_create"],
						},
						{
							id: "repo branch deleted",
							text: "Deleted",
							icon: "octicon-git-branch-delete",
							classNames: ["branch_delete"],
						},
					],
				},
				{
					id: "repo tagged",
					text: "Tag",
					icon: "octicon-tag",
					classNames: ["tag_add", "tag_remove"],
					subFilters: [
						{
							id: "repo tag added",
							text: "Added",
							icon: "octicon-tag-add",
							classNames: ["tag_add"],
						},
						{
							id: "repo tag removed",
							text: "Removed",
							icon: "octicon-tag-remove",
							classNames: ["tag_remove"],
						},
					],
				},
			],
		},
		{
			id: "user",
			text: "User",
			icon: "octicon-person",
			classNames: ["follow"],
		},
		{
			id: "starred",
			text: "Starred",
			icon: "octicon-star",
			classNames: ["watch_started"],
		},
		{
			id: "wiki",
			text: "Wiki",
			icon: "octicon-book",
			classNames: ["wiki_created", "wiki_edited"],
			subFilters: [
				{
					id: "wiki created",
					text: "Created",
					icon: "octicon-plus",
					classNames: ["wiki_created"],
				},
				{
					id: "wiki edited",
					text: "Edited",
					icon: "octicon-book",
					classNames: ["wiki_edited"],
				},
			],
		},
	];

	var REPOS = [];

	var USERS = [];

	var datasetId = "githubNewsFeedFilter";
	var datasetIdLong = "data-github-news-feed-filter";
	var filterElement = "github-news-feed-filter";
	var filterListElement = "github-news-feed-filter-list";

	function proxy(fn) {
		return function () {
			var that = this;
			return function (e) {
				var args = that.slice(0); // Clone.
				args.unshift(e); // Prepend event.
				fn.apply(this, args);
			};
		}.call([].slice.call(arguments, 1));
	}

	function addStyle(css) {
		var node = document.createElement("style");
		node.type = "text/css";
		node.appendChild(document.createTextNode(css));
		document.head.appendChild(node);
	}

	addStyle(`
		github-news-feed-filter { display: block; }

		github-news-feed-filter .filter-bar { padding: 0; }

		github-news-feed-filter .count { margin-right: 15px; }

		github-news-feed-filter .filter-list .mini-repo-list-item { padding-right: 64px; }

		github-news-feed-filter .filter-list .filter-list .mini-repo-list-item { padding-left: 40px; border-top: 1px dashed #E5E5E5; }
		github-news-feed-filter .filter-list .filter-list .filter-list .mini-repo-list-item { padding-left: 50px; }

		github-news-feed-filter .filter-list { display: none; }
		github-news-feed-filter .open > .filter-list { display: block; }
		github-news-feed-filter .filter-list.open { display: block; }

		github-news-feed-filter .private { font-weight: bold; }

		github-news-feed-filter .stars .octicon { position: absolute; right: -4px; }
		github-news-feed-filter .filter-list-item.open > a > .stars > .octicon { transform: rotate(-90deg); }

		.no-alerts { font-style: italic; }
	`);

	// Add filter menu list.
	function addFilterMenu(
		type,
		filters,
		parent,
		newsContainer,
		filterContainer,
		main,
	) {
		var ul = document.createElement("ul");
		ul.classList.add("filter-list");
		if (main) {
			ul.classList.add("mini-repo-list");
		}
		parent.appendChild(ul);

		filters.forEach(function (subFilter) {
			var li = addFilterMenuItem(
				type,
				subFilter,
				ul,
				newsContainer,
				filterContainer,
			);

			if (subFilter.subFilters) {
				addFilterMenu(
					type,
					subFilter.subFilters,
					li,
					newsContainer,
					filterContainer,
					false,
				);
			}
		});
	}

	// Add filter menu item.
	function addFilterMenuItem(
		type,
		filter,
		parent,
		newsContainer,
		filterContainer,
	) {
		// Filter item.
		var li = document.createElement("li");
		li.classList.add("filter-list-item");
		li.filterClassNames = filter.classNames;
		parent.appendChild(li);

		// Filter link.
		var a = document.createElement("a");
		a.classList.add("mini-repo-list-item", "css-truncate");
		a.setAttribute("href", filter.link || "/");
		a.setAttribute("title", filter.classNames.join(" & "));
		a.dataset[datasetId] = filter.id;
		a.addEventListener(
			"click",
			proxy(onFilterItemClick, type, newsContainer, filterContainer),
		);
		li.appendChild(a);

		// Filter icon.
		var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
		svg.classList.add("repo-icon", "octicon", filter.icon);
		svg.setAttribute("height", "16");
		svg.setAttribute("width", "16");
		a.appendChild(svg);
		var path = document.createElementNS(
			"http://www.w3.org/2000/svg",
			"path",
		);
		path.setAttribute("d", ICONS[filter.icon]);
		svg.appendChild(path);

		// Filter text.
		var text = filter.text.split("/");
		var t = document.createElement("span");
		t.classList.add("repo-and-owner", "css-truncate-target");
		a.appendChild(t);
		var to = document.createElement("span");
		to.classList.add("owner");
		to.appendChild(document.createTextNode(text[0]));
		t.appendChild(to);
		if (text.length > 1) {
			text.shift();
			t.appendChild(document.createTextNode("/"));
			var tr = document.createElement("span");
			tr.classList.add("repo");
			tr.appendChild(document.createTextNode(text.join("/")));
			t.appendChild(tr);
		}

		// Filter count & sub list arrow.
		var s = document.createElement("span");
		s.classList.add("stars");
		var c = document.createElement("span");
		c.classList.add("count");
		c.appendChild(document.createTextNode("0"));
		s.appendChild(c);
		if (filter.subFilters) {
			s.appendChild(document.createTextNode(" "));
			var osvg = document.createElementNS(
				"http://www.w3.org/2000/svg",
				"svg",
			);
			osvg.classList.add("octicon", "octicon-triangle-left");
			osvg.setAttribute("height", "16");
			osvg.setAttribute("width", "6");
			s.appendChild(osvg);
			var opath = document.createElementNS(
				"http://www.w3.org/2000/svg",
				"path",
			);
			opath.setAttribute("d", ICONS["octicon-triangle-left"]);
			osvg.appendChild(opath);
		}
		a.appendChild(s);

		return li;
	}

	// Filter item click event.
	function onFilterItemClick(e, type, newsContainer, filterContainer) {
		e.preventDefault();

		// Store current filter.
		setCurrentFilter(type, this.dataset[datasetId]);

		// Open/close sub list.
		Array.forEach(
			filterContainer.querySelectorAll(":scope .open"),
			function (item) {
				item.classList.remove("open");
			},
		);
		showParentMenu(this);
		this.parentNode.classList.add("open");

		// Give it a colored background.
		Array.forEach(
			filterContainer.querySelectorAll(":scope .private"),
			function (m) {
				m.classList.remove("private");
			},
		);
		this.parentNode.classList.add("private");

		// Toggle alert visibility.
		toggleAlertsVisibility(newsContainer);
	}

	// Toggle alert visibility.
	function toggleAlertsVisibility(newsContainer) {
		// Get selected filters.
		var anyVisibleAlert = false;
		var classNames = [];
		var selected = document.querySelectorAll(
			":scope " + filterElement + " .private",
		);
		if (selected.length > 0) {
			Array.prototype.forEach.call(selected, function (item) {
				classNames.push(item.filterClassNames);
			});
		}

		// Show/hide alerts.
		if (
			classNames.length === 0 ||
			classNames.every(function (cl) {
				return cl.every(function (c) {
					return ~c.indexOf("*");
				});
			})
		) {
			anyVisibleAlert = true;
			getAllAlerts(newsContainer).forEach(function (alert) {
				alert.style.display = "block";
			});
		} else {
			getAllAlerts(newsContainer).forEach(function (alert) {
				var show = classNames.every(function (cl) {
					return cl.some(function (c) {
						return ~c.indexOf("*") || alert.classList.contains(c);
					});
				});
				anyVisibleAlert = show || anyVisibleAlert;
				alert.style.display = show ? "block" : "none";
				// DEBUG: uncomment following line and comment previous line to debug all alerts.
				//if(show) alert.style.display = 'none';
			});
		}

		// Show/hide message about no alerts.
		var none = newsContainer.querySelector(":scope .no-alerts");
		if (anyVisibleAlert && none) {
			none.parentNode.removeChild(none);
		} else if (!anyVisibleAlert && !none) {
			none = document.createElement("div");
			none.classList.add("no-alerts");
			none.appendChild(
				document.createTextNode(
					"No feed items for this filter. Please select another filter.",
				),
			);
			var firstAlert = getAllAlerts(newsContainer)[0];
			firstAlert.parentNode.insertBefore(none, firstAlert);
		}
	}

	// Traverse back up the tree to open sub lists.
	function showParentMenu(menuItem) {
		var parentMenuItem = menuItem.parentNode;
		if (parentMenuItem.classList.contains("filter-list-item")) {
			parentMenuItem.classList.add("open");
			showParentMenu(parentMenuItem.parentNode);
		}
	}

	// Fix filter action identification.
	function fixActionAlerts(newsContainer) {
		getAllAlerts(newsContainer).forEach(function (alert) {
			if (~alert.textContent.indexOf("created branch")) {
				alert.classList.remove("create");
				alert.classList.add("branch_create");
			} else if (~alert.textContent.indexOf("deleted branch")) {
				alert.classList.remove("delete");
				alert.classList.add("branch_delete");
			} else if (
				alert.getElementsByClassName("octicon-tag").length > 0 &&
				!alert.classList.contains("release")
			) {
				alert.classList.remove("create");
				alert.classList.add("tag_add");
			} else if (
				alert.getElementsByClassName("octicon-tag-remove").length > 0
			) {
				alert.classList.remove("delete");
				alert.classList.add("tag_remove");
			} else if (~alert.textContent.indexOf("labeled an issue")) {
				alert.classList.add("issues_labeled");
			} else if (alert.classList.contains("gollum")) {
				alert.classList.remove("gollum");
				if (~alert.innerText.indexOf(" created a wiki page in ")) {
					alert.classList.add("wiki_created");
				} else if (
					~alert.innerText.indexOf(" edited a wiki page in ")
				) {
					alert.classList.add("wiki_edited");
				}
			}
		});
	}
	// Fix filter repo identification.
	function fixRepoAlerts(newsContainer) {
		REPOS = [
			{
				id: "*-repo",
				text: "All repositories",
				icon: "octicon-repo",
				classNames: ["*-repo"],
			},
		];

		// Get unique list of repos.
		var userRepos = new Set();
		getAllAlerts(newsContainer).forEach(function (alert) {
			var alertRepo = alert.querySelector(
				':scope [data-ga-click*="target:repo"]:not([data-ga-click*="target:repositories"])',
			);
			if (alertRepo) {
				// Follow doesn't contain a repo link.
				var userRepo = alertRepo.textContent;
				userRepos.add(userRepo);
				var repo = userRepo.split("/")[1];
				alert.classList.add(repo, userRepo);
			}
		});

		// Get list of user repos (forks) per repo names.
		var repos = {};
		userRepos.forEach(function (userRepo) {
			var repo = userRepo.split("/")[1];
			if (!repos[repo]) {
				repos[repo] = [];
			}
			repos[repo].push(userRepo);
		});

		// Populate global property.
		Object.keys(repos).forEach(function (repo) {
			if (repos[repo].length === 1) {
				var userRepo = repos[repo][0];
				REPOS.push({
					id: userRepo,
					text: userRepo,
					link: userRepo,
					icon: "octicon-repo",
					classNames: [userRepo],
				});
			} else {
				var repoForks = {
					id: repo,
					text: repo,
					icon: "octicon-repo-clone",
					classNames: [repo],
					subFilters: [],
				};
				repos[repo].forEach(function (userRepo) {
					repoForks.classNames.push(userRepo);
					repoForks.subFilters.push({
						id: userRepo,
						text: userRepo,
						link: userRepo,
						icon: "octicon-repo",
						classNames: [userRepo],
					});
				});
				REPOS.push(repoForks);
			}
		});
	}
	// Fix filter user identification.
	function fixUserAlerts(newsContainer) {
		USERS = [
			{
				id: "*-user",
				text: "All users",
				icon: "octicon-organization",
				classNames: ["*-user"],
			},
		];

		var users = new Set();
		getAllAlerts(newsContainer).forEach(function (alert) {
			var usernameElms = alert.querySelectorAll(
				':scope [data-ga-click*="target:actor"]',
			);
			Array.prototype.find.call(usernameElms, function (usernameElm) {
				var username = usernameElm.textContent;
				if (username) {
					alert.classList.add(username);
					users.add(username);
					return true;
				}
				return false;
			});
		});

		[...users]
			.sort(function (a, b) {
				return a.toLowerCase().localeCompare(b.toLowerCase());
			})
			.forEach(function (username) {
				var user = {
					id: username,
					text: username,
					icon: "octicon-person",
					classNames: [username],
				};
				USERS.push(user);
			});
	}

	// Update filter counts.
	function updateFilterCounts(filterContainer, newsContainer) {
		Array.forEach(
			filterContainer.querySelectorAll(":scope li.filter-list-item"),
			function (li) {
				// Count alerts based on other filters.
				var countFiltered = 0;
				var classNames = [li.filterClassNames];
				var selected = document.querySelectorAll(
					":scope " + filterElement + " li.filter-list-item.private",
				);
				if (selected.length > 0) {
					Array.prototype.forEach.call(selected, function (item) {
						if (item.parentNode.parentNode !== filterContainer) {
							// Exclude list item from current filter container.
							classNames.push(item.filterClassNames);
						}
					});
				}
				getAllAlerts(newsContainer).forEach(function (alert) {
					var show = classNames.every(function (cl) {
						return cl.some(function (c) {
							return (
								~c.indexOf("*") || alert.classList.contains(c)
							);
						});
					});
					if (show) {
						countFiltered++;
					}
				});

				// Count alerts based on current filter.
				var countAll = 0;
				if (~li.filterClassNames[0].indexOf("*")) {
					countAll = getAllAlerts(newsContainer).length;
				} else {
					getAllAlerts(newsContainer).forEach(function (alert) {
						if (
							li.filterClassNames.some(function (cl) {
								return alert.classList.contains(cl);
							})
						) {
							countAll++;
						}
					});
				}

				li.querySelector(":scope .count").textContent =
					countAll + " (" + countFiltered + ")";
			},
		);
	}

	// Get all alerts.
	function getAllAlerts(newsContainer) {
		return Array.prototype.map.call(
			newsContainer.querySelectorAll(
				":scope div[data-repository-hovercards-enabled] > div > .body",
			),
			function (alert) {
				return alert.parentNode;
			},
		);
	}

	var CURRENT = {};

	// Set current filter.
	function setCurrentFilter(type, filter) {
		CURRENT[type] = filter;
	}

	// Get current filter.
	function getCurrentFilter(type, filterContainer) {
		var filter = CURRENT[type] || "*-" + type;
		filterContainer
			.querySelector(":scope [" + datasetIdLong + '="' + filter + '"]')
			.dispatchEvent(new Event("click"));
	}

	// Add filter tab.
	function addFilterTab(type, text, inner, filterer, onCreate, onSelect) {
		var filterTabInner = document.createElement("a");
		filterTabInner.setAttribute("href", "#");
		filterTabInner.classList.add("UnderlineNav-item");
		filterTabInner.appendChild(document.createTextNode(text));
		filterer.appendChild(filterTabInner);

		var filterContainer = document.createElement(filterListElement);
		inner.appendChild(filterContainer);

		filterTabInner.addEventListener(
			"click",
			proxy(filterTabInnerClick, type, inner, filterContainer, onSelect),
		);

		onCreate && onCreate(type, filterContainer);
	}

	// Filter tab click event.
	function filterTabInnerClick(e, type, inner, filterContainer, onSelect) {
		e.preventDefault();

		var selected = inner.querySelector(":scope .selected");
		selected && selected.classList.remove("selected");
		this.classList.add("selected");

		Array.forEach(
			inner.querySelectorAll(filterListElement),
			function (menu) {
				menu && menu.classList.remove("open");
			},
		);
		filterContainer.classList.add("open");

		onSelect && onSelect(type, filterContainer);
	}

	// Init.
	(function init() {
		var newsContainer = document.querySelector(".news");
		if (!newsContainer) {
			return;
		}

		// GitHub homepage or profile activity tab.
		var sidebar =
			document.querySelector(".dashboard-sidebar:not(.is-placeholder)") ||
			document.querySelector(".profilecols > .column:first-child");

		var wrapper = document.createElement(filterElement);
		wrapper.classList.add("boxed-group", "flush", "user-repos");
		sidebar.insertBefore(
			wrapper,
			sidebar.querySelector(":scope > *:not(details)"),
		);

		var headerAction = document.createElement("div");
		headerAction.classList.add("boxed-group-action");
		wrapper.appendChild(headerAction);

		var headerLink = document.createElement("a");
		headerLink.setAttribute(
			"href",
			"https://github.com/jerone/UserScripts",
		);
		headerLink.classList.add("btn", "btn-sm");
		headerAction.appendChild(headerLink);

		var headerLinkSvg = document.createElementNS(
			"http://www.w3.org/2000/svg",
			"svg",
		);
		headerLinkSvg.classList.add("octicon", "octicon-home");
		headerLinkSvg.setAttribute("height", "16");
		headerLinkSvg.setAttribute("width", "16");
		headerLinkSvg.setAttribute(
			"title",
			"Open Github News Feed Filter homepage",
		);
		headerLink.appendChild(headerLinkSvg);
		var headerLinkPath = document.createElementNS(
			"http://www.w3.org/2000/svg",
			"path",
		);
		headerLinkPath.setAttribute("d", ICONS["octicon-home"]);
		headerLinkSvg.appendChild(headerLinkPath);

		var headerText = document.createElement("h3");
		headerText.appendChild(document.createTextNode("News feed filter"));
		wrapper.appendChild(headerText);

		var inner = document.createElement("div");
		inner.classList.add("boxed-group-inner");
		wrapper.appendChild(inner);

		var bar = document.createElement("div");
		bar.classList.add("filter-bar");
		inner.appendChild(bar);

		var filterer = document.createElement("nav");
		filterer.classList.add("UnderlineNav-body");
		bar.appendChild(filterer);

		// Create filter tabs.
		addFilterTab(
			"action",
			"Actions",
			inner,
			filterer,
			function onCreateActions(type, filterContainer) {
				// Create filter menu.
				addFilterMenu(
					type,
					ACTIONS,
					filterContainer,
					newsContainer,
					filterContainer,
					true,
				);
			},
			function onSelectActions(type, filterContainer) {
				// Fix alert identification.
				fixActionAlerts(newsContainer);
				// Update filter counts.
				updateFilterCounts(filterContainer, newsContainer);
				// Restore current filter.
				getCurrentFilter(type, filterContainer);
			},
		);
		addFilterTab(
			"repo",
			"Repositories",
			inner,
			filterer,
			function onCreateRepos(type, filterContainer) {
				// Fix filter identification and create repos list.
				fixRepoAlerts(newsContainer);
				// Create filter menu.
				addFilterMenu(
					type,
					REPOS,
					filterContainer,
					newsContainer,
					filterContainer,
					true,
				);
			},
			function onSelectRepos(type, filterContainer) {
				// Fix alert identification and create repos list.
				fixRepoAlerts(newsContainer);
				// Empty list, so it can be filled again.
				while (filterContainer.hasChildNodes()) {
					filterContainer.removeChild(filterContainer.lastChild);
				}
				// Create filter menu.
				addFilterMenu(
					type,
					REPOS,
					filterContainer,
					newsContainer,
					filterContainer,
					true,
				);
				// Update filter counts.
				updateFilterCounts(filterContainer, newsContainer);
				// Restore current filter.
				getCurrentFilter(type, filterContainer);
			},
		);
		addFilterTab(
			"user",
			"Users",
			inner,
			filterer,
			function onCreateUsers(type, filterContainer) {
				// Fix filter identification and create users list.
				fixUserAlerts(newsContainer);
				// Create filter menu.
				addFilterMenu(
					type,
					USERS,
					filterContainer,
					newsContainer,
					filterContainer,
					true,
				);
			},
			function onSelectUsers(type, filterContainer) {
				// Fix filter identification and create users list.
				fixUserAlerts(newsContainer);
				// Empty list, so it can be filled again.
				while (filterContainer.hasChildNodes()) {
					filterContainer.removeChild(filterContainer.lastChild);
				}
				// Create filter menu.
				addFilterMenu(
					type,
					USERS,
					filterContainer,
					newsContainer,
					filterContainer,
					true,
				);
				// Update filter counts.
				updateFilterCounts(filterContainer, newsContainer);
				// Restore current filter.
				getCurrentFilter(type, filterContainer);
			},
		);

		// Open first filter tab.
		filterer.querySelector("a").dispatchEvent(new Event("click"));

		// Update on clicking "More"-button.
		new MutationObserver(function () {
			// Re-click the current selected filter on open filter tab.
			filterer
				.querySelector("a.selected")
				.dispatchEvent(new Event("click"));
		}).observe(newsContainer, { childList: true, subtree: true });
	})();
})();