Adds quick English filter to nHentai pages.
// ==UserScript==
// @name nHentai English Filter
// @description Adds quick English filter to nHentai pages.
// @author Hen-Tie
// @homepage https://hen-tie.tumblr.com/
// @namespace https://greasyfork.org/en/users/8336
// @include /https:\/\/nhentai\.net\/(parody|favorites|artist|tag|group|category|search)\/(?!.*english)/
// @icon https://i.imgur.com/pGYy5SR.png
// @version 5.2
// ==/UserScript==
var pathname = window.location.pathname;
var namespaceQuery = window.location.pathname.split('/')[2];
var searchQuery = window.location.search.split('=')[1];
var namespaceSearchLink = '<div class="sort-type"><a href="https://nhentai.net/search/?q=' + namespaceQuery + '+English">English Only</a></div>';
var siteSearchLink = '<div class="sort-type"><a href="https://nhentai.net/search/?q=' + searchQuery + '+English">English Only</a></div>';
var favSearchBtn = '<a class="btn btn-primary" href="https://nhentai.net/favorites/?q=English+' + searchQuery + '"><i class="fa fa-flag"></i> ENG</a>';
var favPageBtn = '<a class="btn btn-primary" href="https://nhentai.net/favorites/?q=English+"><i class="fa fa-flag"></i> ENG</a>';
if (/\/(artist|tag|group|category|parody)\//.test(pathname)) { // namespace searches
document.getElementsByClassName('sort')[0].innerHTML += namespaceSearchLink;
} else if (/\/search\//.test(pathname)) { // general searches
document.getElementsByClassName('sort')[0].innerHTML += siteSearchLink;
} else if (/\/favorites\//.test(pathname)) { // fav searches
if (window.location.search.length) {
document.getElementById('favorites-random-button').insertAdjacentHTML('afterend', favSearchBtn);
} else {
document.getElementById('favorites-random-button').insertAdjacentHTML('afterend', favPageBtn);
}
}