[GMT] Flexible Search Links

Appends versatile search links bar to linkbar

// ==UserScript==
// @name         [GMT] Flexible Search Links
// @namespace    https://greasyfork.org/users/321857-anakunda
// @version      1.61.0
// @description  Appends versatile search links bar to linkbar
// @author       Anakunda
// @copyright    2021, Anakunda (https://greasyfork.org/users/321857-anakunda)
// @license      GPL-3.0-or-later
// @match        https://*/torrents.php?id=*
// @match        https://*/artist.php?id=*
// @match        https://*/requests.php?action=view&id=*
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_deleteValue
// @grant        GM_listValues
// @grant        GM_registerMenuCommand
// @require      https://openuserjs.org/src/libs/Anakunda/libCtxtMenu.min.js
// ==/UserScript==

'use strict';

if (document.querySelector('div.sidebar > div.box_artists') == null) return; // not a music category
const header = document.querySelector('div#content div.header');
if (header == null) throw 'Unexpected page structure';
for (let fn of ['GM_getValue', 'GM_setValue'/*, 'GM_listValues'*/])
	if (!(fn in window)) throw 'GM extensions not available';

if (typeof GM_deleteValue == 'function') {
	var menu = document.createElement('menu');
	menu.type = 'context';
	menu.id = 'context-1d19ca90-5242-418a-b6d3-d9a9fd5e5cfc';
	menu.innerHTML = '<menuitem label="Remove this link" icon="data:image/png;base64,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" /><menuitem label="-" />';
	menu.deleter = function(searchLinks, branch) {
		if (typeof searchLinks != 'object') throw 'Invalid argument (searchLinks)';
		if (!branch) throw 'Invalid argument (branch)';
		if (!(this.invoker instanceof HTMLAnchorElement)) throw 'Invoker not set';
		if (!(this.invoker.textContent in searchLinks)) {
			console.debug('searchLinks:', Object.keys(searchLinks), this.invoker.textContent);
			throw '"' + this.invoker.textContent + '" not a key of searchLinks';
		}
		if (!confirm('Are you sure to remove ' + this.invoker.textContent + ' from search bar?')) return false;
		delete searchLinks[this.invoker.textContent];
		if (this.invoker.nextSibling != null && this.invoker.nextSibling.nodeType == 3) this.invoker.nextSibling.remove();
			else if (this.invoker.previousSibling.textContent == divisor) this.invoker.previousSibling.remove();
		this.invoker.remove();
		GM_setValue(branch, searchLinks);
		alert('Site was removed. To restore it, use reset command from script\'s submenu');
	}.bind(menu);
	menu.callerSetter = function(evt) { this.invoker = evt.currentTarget }.bind(menu);
	document.body.append(menu);
}

const searchBox = document.createElement('div'), divisor = ' | ';
searchBox.className = 'searchbox';
searchBox.style = 'text-align: center; padding-bottom: 5px; margin-top: -1px;';
const fileName = document.location.pathname.replace(/^.*\//, '').toLowerCase();
let searchLinks = GM_getValue(fileName);

String.prototype.toASCII = function() {
	return this.normalize("NFKD").replace(/[\x00-\x1F\u0080-\uFFFF]/g, '');
};

switch (fileName) {
	case 'torrents.php':
	case 'requests.php': {
		const defaultSearchLinks = fileName == 'torrents.php' ? {
			'Orpheus': 'https://orpheus.network/torrents.php?action=advanced&artistname=${real_artists}&groupname=${album}',
			'RuTracker': 'https://rutracker.org/forum/tracker.php?nm=${real_artists_quoted}+${album_quoted}',
			'Google': 'https://www.google.com/search?q=${artists_quoted}+${album_quoted}+${year}',
			'Google (Images)': 'https://www.google.com/search?q=${artists_quoted}+${album_quoted}+${year}&tbm=isch',
			'Wikipedia': 'https://www.wikipedia.org/w/index.php?search=${artists}+${album}',
			'Discogs': 'https://www.discogs.com/search/?title=${album}&artist=${real_artists}&type=all&layout=med',
			'Discogs (title/year)': 'https://www.discogs.com/search/?title=${album}&year=${year}&type=all&layout=med',
			'MusicBrainz': 'https://musicbrainz.org/taglookup/index?tag-lookup.artist=${real_artists}&tag-lookup.release=${album}',
			'AllMusic': 'https://www.allmusic.com/search/all/${real_artists_quoted}%20${album_quoted}',
			'Rate Your Music': 'https://rateyourmusic.com/search?searchterm=${real_artists_quoted}+${album_quoted}&searchtype=l',
			'Album of the Year': 'https://www.albumoftheyear.org/search/?q=${real_artists}+${album}',
			'Apple Music': 'https://music.apple.com/search?term=${real_artists_quoted}+${album_quoted}',
			'Deezer': 'https://www.deezer.com/search/${artists_quoted}%20${album_quoted}/album',
			'Spotify': 'https://open.spotify.com/search/${artists_quoted}%20${album_quoted}',
			'Tidal': 'https://listen.tidal.com/search/albums?q=${real_artists_quoted}+${album_quoted}',
			'Qobuz': 'https://www.qobuz.com/search?q=${real_artist}+${album}&i=boutique',
			'HighResAudio': 'https://www.highresaudio.com/en/search/?artist=${real_artist_quoted}&album=${album_quoted}&sort=-releaseDate',
			'Bandcamp': 'https://bandcamp.com/search?q=${real_artist_quoted}+${album_quoted}&item_type=a',
			'Mora': 'https://mora.jp/search/top?keyWord=${real_artists_quoted}+${album_quoted}',
			'e-onkyo': 'https://www.e-onkyo.com/search/search.aspx?q=${real_artists_quoted}+${album_quoted}',
			'7digital': 'https://uk.7digital.com/search?q=${real_artists_quoted}+${album_quoted}',
			'Boomkat': 'https://boomkat.com/products?q[keywords]=${album_quoted}',
			'Bleep': 'https://bleep.com/search/query?q=${album}',
			'SoundCloud': 'https://soundcloud.com/search/albums?q=${real_artists_quoted}+${album_quoted}',
			'Amazon Music': 'https://music.amazon.com/search/${real_artists_quoted}%20${album_quoted}',
			'YouTube Music': 'https://music.youtube.com/search?q=${real_artists_quoted}%20${album_quoted}',
			'Presto Jazz': 'https://www.prestomusic.com/jazz/search?search_query=${real_artists_quoted}%20${album_quoted}',
			'Presto Classical': 'https://www.prestomusic.com/classical/search?search_query=${real_artists_quoted}%20${album_quoted}',
			'ProStudioMasters': 'https://www.prostudiomasters.com/search?cs=1&q=${real_artists_quoted}+${album_quoted}',
			'Acoustic Sounds': 'https://store.acousticsounds.com/index.cfm?get=results&Artist=${real_artists}&Album=${album}',
			'Beatport': 'https://www.beatport.com/search/releases?q=${real_artists_quoted}+${album_quoted}',
			'Beatsource': 'https://www.beatsource.com/search?q=${real_artists_quoted}+${album_quoted}',
			'Juno Download': 'https://www.junodownload.com/search/?solrorder=relevancy&q%5Ball%5D%5B%5D=${real_artists}%20${album}',
			'Traxsource': 'https://www.traxsource.com/search/titles?term=${real_artists_quoted}+${album_quoted}',
			'Last.fm': 'https://www.last.fm/search?q=${real_artists_quoted}+${album_quoted}',
			'OTOTOY': 'https://ototoy.jp/find/?q=${album_quoted}',
			'Recochoku (レコチョク)': 'https://recochoku.jp/search/all?q=${real_artist}+${album}',
			'NetEase': 'https://music.163.com/#/search/m/?s=${real_artists_quoted}%20${album_quoted}&type=10',
			'QQ音乐': 'https://y.qq.com/portal/search.html#t=album&w=${real_artists_quoted}%20${album_quoted}',
		} : {
			'Orpheus': 'https://orpheus.network/torrents.php?action=advanced&artistname=${real_artists}&groupname=${album}',
			'RuTracker': 'https://rutracker.org/forum/tracker.php?nm=${real_artists_quoted}+${album_quoted}',
			'Google': 'https://www.google.com/search?q=${artists_quoted}+${album_quoted}+${year}',
			'Google (Images)': 'https://www.google.com/search?q=${artists_quoted}+${album_quoted}+${year}&tbm=isch',
			'Wikipedia': 'https://www.wikipedia.org/w/index.php?search=${artists}+${album}',
			'Discogs': 'https://www.discogs.com/search/?title=${album}&artist=${real_artists}&type=all&layout=med',
			'Discogs (title/year)': 'https://www.discogs.com/search/?title=${album}&year=${year}&type=all&layout=med',
			'Discogs (label/cat№)': 'https://www.discogs.com/search/?label=${label}&catno=${cat_no}&type=all&layout=med',
			'MusicBrainz': 'https://musicbrainz.org/taglookup/index?tag-lookup.artist=${real_artists}&tag-lookup.release=${album}',
			'AllMusic': 'https://www.allmusic.com/search/all/${real_artists_quoted}%20${album_quoted}',
			'Rate Your Music': 'https://rateyourmusic.com/search?searchterm=${real_artists_quoted}+${album_quoted}&searchtype=l',
			'Album of the Year': 'https://www.albumoftheyear.org/search/?q=${real_artists_quoted}+${album_quoted}',
			'Apple Music': 'https://music.apple.com/search?term=${real_artists_quoted}+${album_quoted}',
			'Deezer': 'https://www.deezer.com/search/${artists_quoted}%20${album_quoted}/album',
			'Spotify': 'https://open.spotify.com/search/${artists_quoted}%20${album_quoted}',
			'Tidal': 'https://listen.tidal.com/search/albums?q=${real_artists_quoted}+${album_quoted}',
			'Qobuz': 'https://www.qobuz.com/search?q=${real_artist}+${album}&i=boutique',
			'HighResAudio': 'https://www.highresaudio.com/en/search/?artist=${real_artist_quoted}&album=${album_quoted}&sort=-releaseDate',
			'Bandcamp': 'https://bandcamp.com/search?q=${real_artist_quoted}+${album_quoted}&item_type=a',
			'Mora': 'https://mora.jp/search/top?keyWord=${real_artists_quoted}+${album_quoted}',
			'e-onkyo': 'https://www.e-onkyo.com/search/search.aspx?q=${real_artists_quoted}+${album_quoted}',
			'7digital': 'https://uk.7digital.com/search?q=${real_artists_quoted}+${album_quoted}',
			'Boomkat': 'https://boomkat.com/products?q[keywords]=${album_quoted}',
			'Bleep': 'https://bleep.com/search/query?q=${album}',
			'SoundCloud': 'https://soundcloud.com/search/albums?q=${real_artists_quoted}+${album_quoted}',
			'Amazon Music': 'https://music.amazon.com/search/${real_artists_quoted}%20${album_quoted}',
			'YouTube Music': 'https://music.youtube.com/search?q=${real_artists_quoted}%20${album_quoted}',
			'Presto Jazz': 'https://www.prestomusic.com/jazz/search?search_query=${real_artists_quoted}%20${album_quoted}',
			'Presto Classical': 'https://www.prestomusic.com/classical/search?search_query=${real_artists_quoted}%20${album_quoted}',
			'ProStudioMasters': 'https://www.prostudiomasters.com/search?cs=1&q=${real_artists_quoted}+${album_quoted}',
			'Acoustic Sounds': 'https://store.acousticsounds.com/index.cfm?get=results&Artist=${real_artists}&Album=${album}',
			'Beatport': 'https://www.beatport.com/search/releases?q=${real_artists_quoted}+${album_quoted}',
			'Beatsource': 'https://www.beatsource.com/search?q=${real_artists_quoted}+${album_quoted}',
			'Juno Download': 'https://www.junodownload.com/search/?solrorder=relevancy&q%5Ball%5D%5B%5D=${real_artists}%20${album}',
			'Traxsource': 'https://www.traxsource.com/search/titles?term=${real_artists_quoted}+${album_quoted}',
			'Last.fm': 'https://www.last.fm/search?q=${real_artists_quoted}+${album_quoted}',
			'OTOTOY': 'https://ototoy.jp/find/?q=${album_quoted}',
			'Recochoku (レコチョク)': 'https://recochoku.jp/search/all?q=${real_artist}+${album}',
			'NetEase': 'https://music.163.com/#/search/m/?s=${real_artists_quoted}%20${album_quoted}&type=10',
			'QQ音乐': 'https://y.qq.com/portal/search.html#t=album&w=${real_artists_quoted}%20${album_quoted}',
		};
		if (typeof searchLinks != 'object') GM_setValue(fileName, searchLinks = defaultSearchLinks);
		//console.debug('searchLinks:', searchLinks);
		if (typeof GM_registerMenuCommand == 'function' && typeof GM_deleteValue == 'function')
			GM_registerMenuCommand('Reset links to default', function() {
				if (!confirm('Are you sure to discard current configuration?')) return;
				GM_setValue(fileName, searchLinks = defaultSearchLinks);
				if (header.querySelector('div.searchbox') == null) header.append(searchBox);
				searchBox.build();
			}, 'R');
		if (Object.keys(searchLinks) <= 0) return;
		menu.onclick = evt => menu.deleter(searchLinks, fileName);
		let full_title = header.querySelector('h2 > span:last-of-type');
		if (full_title != null) full_title = full_title.textContent.trim(); else throw 'Unexpected page structure';
		const title = full_title.replace(/\s+(?:EP|E\.\s?P\.|\(EP\)|\(E\.\s?P\.\)|-\s*EP|-\s*E\.\s?P\.|\(Live\)|- Live)$/, '');
		let albumArtist = header.querySelector('div.header > h2 > a:last-of-type');
		if (albumArtist != null) albumArtist = albumArtist.textContent.trim();
		let releaseType, label, cat_no;
		switch (fileName) {
			case 'torrents.php':
				releaseType = header.querySelector('div.header > h2');
				if (releaseType != null) releaseType = /\[([^\[\]]*)\]$/.exec(releaseType.textContent.trim());
				releaseType = releaseType != null && releaseType[1] || undefined;
				label = cat_no = '';
				break;
			case 'requests.php': {
				function getValue(label) {
					if (label) for (let tr of document.body.querySelectorAll('div.main_column > table > tbody > tr'))
						if ([0, 1].every(ndx => tr.children[ndx] != null)
								&& tr.children[0].textContent.trim().toLowerCase() == label.toLowerCase())
							return tr.children[1].textContent.trim();
					return '';
				}
				releaseType = getValue('Release type');
				label = getValue('Record label');
				cat_no = getValue('Catalogue number');
				break;
			}
		}
		const isComp = releaseType == 'Compilation', VA = 'Various Artists';
		let year = header.querySelector('h2');
		if (year != null) year = /\[(\d{4})\]/.exec(year.lastChild.textContent);
		year = year != null ? parseInt(year[1]) : '????';
		console.debug(year >= 1900 && year < 1e4, 'year >= 1900 && year < 1e4');
		const mainArtists = Array.from(document.querySelectorAll((fileName == 'torrents.php' ?
			'ul#artist_list > li.artist_main' : 'ul > li.artists_main') + ' > a[href]')).map(a => a.textContent.trim());
		const artist = isComp ? VA : mainArtists.length > 0 ? encodeURIComponent(mainArtists[0]) : '',
					artist_asc = isComp ? VA : mainArtists.length > 0 ? encodeURIComponent(mainArtists[0].toASCII()) : '',
					artist_quoted = isComp ? VA : mainArtists.length > 0 ? encodeURIComponent('"' + mainArtists[0] + '"') : '',
					artist_asc_quoted = isComp ? VA : mainArtists.length > 0 ? encodeURIComponent('"' + mainArtists[0].toASCII() + '"') : '',
					real_artist = isComp ? '' : mainArtists.length > 0 ? encodeURIComponent(mainArtists[0]) : '',
					real_artist_asc = isComp ? '' : mainArtists.length > 0 ? encodeURIComponent(mainArtists[0].toASCII()) : '',
					real_artist_quoted = isComp ? '' : mainArtists.length > 0 ? encodeURIComponent('"' + mainArtists[0] + '"') : '',
					real_artist_asc_quoted = isComp ? '' : mainArtists.length > 0 ? encodeURIComponent('"' + mainArtists[0].toASCII() + '"') : '',
					artists = isComp ? VA : encodeURIComponent(mainArtists.slice(0, 3).join(' ')),
					artists_asc = isComp ? VA : encodeURIComponent(mainArtists.slice(0, 3).map(name => name.toASCII()).join(' ')),
					artists_quoted = isComp ? VA : encodeURIComponent(mainArtists.slice(0, 3).map(artist => '"' + artist + '"').join(' ')),
					artists_asc_quoted = isComp ? VA : encodeURIComponent(mainArtists.slice(0, 3).map(artist => '"' + artist.toASCII() + '"').join(' ')),
					real_artists = isComp ? '' : encodeURIComponent(mainArtists.slice(0, 3).join(' ')),
					real_artists_asc = isComp ? '' : encodeURIComponent(mainArtists.slice(0, 3).map(name => name.toASCII()).join(' ')),
					real_artists_quoted = isComp ? '' : encodeURIComponent(mainArtists.slice(0, 3).map(artist => '"' + artist + '"').join(' ')),
					real_artists_asc_quoted = isComp ? '' : encodeURIComponent(mainArtists.slice(0, 3).map(artist => '"' + artist.toASCII() + '"').join(' ')),
					all_artists = isComp ? VA : encodeURIComponent(mainArtists.join(' ')),
					all_artists_asc = isComp ? VA : encodeURIComponent(mainArtists.map(name => name.toASCII()).join(' ')),
					all_artists_quoted = isComp ? VA : encodeURIComponent(mainArtists.map(artist => '"' + artist + '"').join(' ')),
					all_artists_asc_quoted = isComp ? VA : encodeURIComponent(mainArtists.map(artist => '"' + artist.toASCII() + '"').join(' ')),
					album_artist = isComp ? VA : albumArtist ? encodeURIComponent(albumArtist) : '',
					album_artist_asc = isComp ? VA : albumArtist ? encodeURIComponent(albumArtist.toASCII()) : '',
					album_artist_quoted = isComp ? VA : albumArtist ? encodeURIComponent('"' + albumArtist + '"') : '',
					album_artist_asc_quoted = isComp ? VA : albumArtist ? encodeURIComponent('"' + albumArtist.toASCII() + '"') : '',
					real_album_artist = isComp ? '' : albumArtist ? encodeURIComponent(albumArtist) : '',
					real_album_artist_asc = isComp ? '' : albumArtist ? encodeURIComponent(albumArtist.toASCII()) : '',
					real_album_artist_quoted = isComp ? '' : albumArtist ? encodeURIComponent('"' + albumArtist + '"') : '',
					real_album_artist_asc_quoted = isComp ? '' : albumArtist ? encodeURIComponent('"' + albumArtist.toASCII() + '"') : '',
					album = encodeURIComponent(title),
					album_asc = encodeURIComponent(title.toASCII()),
					album_quoted = encodeURIComponent('"' + title + '"'),
					album_asc_quoted = encodeURIComponent('"' + title.toASCII() + '"'),
					release_type = releaseType ? encodeURIComponent(releaseType) : '';
		(searchBox.build = function() {
			this.textContent = 'Lookup on: ';
			for (let key in searchLinks) {
				if (this.lastChild.nodeName == 'A') this.append(divisor);
				let a = document.createElement('A');
				a.textContent = key;
				try { a.href = eval('`' + searchLinks[key] + '`') } catch(e) {
					console.error('Invalid URL format for', key, searchLinks[key], e);
					continue;
				}
				a.target = '_blank';
				if (typeof GM_deleteValue == 'function' && menu instanceof HTMLElement) {
					a.setAttribute('contextmenu', menu.id);
					a.oncontextmenu = menu.callerSetter;
				}
				this.append(a);
			}
		}.bind(searchBox))();
		header.append(searchBox);
		break;
	}
	case 'artist.php': {
		const defaultSearchLinks = {
			'Orpheus': 'https://orpheus.network/artist.php?artistname=${artist}',
			'RuTracker': 'https://rutracker.org/forum/tracker.php?nm=${artist_quoted}',
			'Google': 'https://www.google.com/search?q=${artist_quoted}',
			'Google (Images)': 'https://www.google.com/search?q=${artist_quoted}&tbm=isch',
			'Wikipedia': 'https://www.wikipedia.org/w/index.php?search=${artist_quoted}',
			'Discogs': 'https://www.discogs.com/search/?q=${artist}&type=artist&layout=med',
			'MusicBrainz': 'https://musicbrainz.org/search?query=${artist_quoted}&type=artist',
			'AllMusic': 'https://www.allmusic.com/search/artists/${artist}',
			'Rate Your Music': 'https://rateyourmusic.com/search?searchterm=${artist_quoted}&searchtype=a',
			'Album of the Year': 'https://www.albumoftheyear.org/search/?q=${artist}',
			'Artist Info': 'https://music.metason.net/artistinfo?name=${artist}',
			'Apple Music': 'https://music.apple.com/search?term=${artist_quoted}',
			'Deezer': 'https://www.deezer.com/search/${artist}/artist',
			'Spotify': 'https://open.spotify.com/search/${artist_quoted}',
			'Tidal': 'https://listen.tidal.com/search/artists?q=${artist_quoted}',
			'Qobuz': 'https://www.qobuz.com/search?q=${artist}&i=boutique',
			'HighResAudio': 'https://www.highresaudio.com/en/search/?artist=${artist_quoted}',
			'Bandcamp': 'https://bandcamp.com/search?q=${artist_quoted}&item_type=b',
			'Mora': 'https://mora.jp/search/top?keyWord=${artist_quoted}',
			'e-onkyo': 'https://www.e-onkyo.com/search/search.aspx?q=${artist_quoted}',
			'7digital': 'https://uk.7digital.com/search?q=${artist_quoted}',
			'Boomkat': 'https://boomkat.com/products?q[keywords]=${artist_quoted}',
			'Bleep': 'https://bleep.com/search/query?q=${artist}',
			'SoundCloud': 'https://soundcloud.com/search/people?q=${artist_quoted}',
			'Amazon Music': 'https://music.amazon.com/search/${artist_quoted}',
			'YouTube Music': 'https://music.youtube.com/search?q=${artist_quoted}',
			'Presto Jazz': 'https://www.prestomusic.com/jazz/search?search_query=${artist_quoted}',
			'Presto Classical': 'https://www.prestomusic.com/classical/search?search_query=${artist_quoted}',
			'ProStudioMasters': 'https://www.prostudiomasters.com/search?cs=1&q=${artist_quoted}',
			'Acoustic Sounds': 'https://store.acousticsounds.com/index.cfm?get=results&Artist=${artist}',
			'Beatport': 'https://www.beatport.com/search/artists?q=${artist_quoted}',
			'Beatsource': 'https://www.beatsource.com/search?q=${artist_quoted}',
			'Juno Download': 'https://www.junodownload.com/search/?solrorder=relevancy&q%5Ball%5D%5B%5D=${artist}',
			'Traxsource': 'https://www.traxsource.com/search/artists?term=${artist_quoted}',
			'Last.fm': 'https://www.last.fm/search/artists?q=${artist_quoted}',
			'OTOTOY': 'https://ototoy.jp/find/?q=${artist_quoted}',
			'Recochoku (レコチョク)': 'https://recochoku.jp/search/artist?q=${artist}',
			'NetEase': 'https://music.163.com/#/search/m/?s=${artist_quoted}&type=100',
			'QQ音乐': 'https://y.qq.com/portal/search.html#t=artist&w=${artist_quoted}',
		};
		if (typeof searchLinks != 'object') GM_setValue(fileName, searchLinks = defaultSearchLinks);
		//console.debug('searchLinks:', searchLinks);
		if (typeof GM_registerMenuCommand == 'function' && typeof GM_deleteValue == 'function')
			GM_registerMenuCommand('Reset links to default', function() {
				if (!confirm('Are you sure to discard current configuration?')) return;
				GM_setValue(fileName, searchLinks = defaultSearchLinks);
				if (header.querySelector('div.searchbox') == null) header.append(searchBox);
				searchBox.build();
			}, 'R');
		if (Object.keys(searchLinks) <= 0) return;
		menu.onclick = evt => menu.deleter(searchLinks, fileName);
		let h2 = header.querySelector('h2');
		if (h2 == null) throw 'Unexpected page structure';
		const artist = encodeURIComponent(h2.textContent.trim()),
					artist_asc = encodeURIComponent(h2.textContent.trim().toASCII()),
					artist_quoted = encodeURIComponent('"' + h2.textContent.trim() + '"'),
					artist_asc_quoted = encodeURIComponent('"' + h2.textContent.trim().toASCII() + '"');
		searchBox.style.marginBottom = '1em';
		(searchBox.build = function() {
			this.textContent = 'Lookup on: ';
			for (let key in searchLinks) {
				if (this.lastChild.nodeName == 'A') this.append(divisor);
				let a = document.createElement('A');
				a.textContent = key;
				try { a.href = eval('`' + searchLinks[key] + '`') } catch(e) {
					console.error('Invalid URL format for', key, searchLinks[key], e);
					continue;
				}
				a.target = '_blank';
				if (typeof GM_deleteValue == 'function' && menu) {
					a.setAttribute('contextmenu', menu.id);
					a.oncontextmenu = menu.callerSetter;
				}
				this.append(a);
			}
		}.bind(searchBox))();
		header.append(searchBox);
		break;
	}
}