nhentai Page Changer

Allows to change page with keyboard arrows in results /search pages

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         nhentai Page Changer
// @namespace    http://tampermonkey.net/
// @version      0.5.7
// @description  Allows to change page with keyboard arrows in results /search pages
// @author       You
// @match        https://nhentai.net/search/*
// @include      https://nhentai.net/*
// @grant        none
// ==/UserScript==

(function () {
    "use strict";
    // Your code here...
    window.onkeydown = function (e) {
        var origURL = document.URL;
        var num;
        var prenum;
        var newUrl;
        function getNum() {
            var counter = 1;
            do {
                prenum = origURL.charAt(origURL.length - counter - 1);
                console.log(origURL);
                console.log("prenum: " + prenum);
                console.log(prenum.match(/[0-9]+/g));
                if (prenum.match(/[0-9]+/g)) {
                    counter++;
                }
            } while (prenum.match(/[0-9]+/g));

            return counter;
        }

        var code = e.keyCode ? e.keyCode : e.which;
        if (code === 39) {
            //right key
            if (origURL.includes("page")) {
                if (
                    document.URL.includes("page") &&
                    !document.URL.charAt(document.URL.length - 1).match(/[1-9]/)
                ) {
                    var regx = /(&page=[0-9]+)/g;
                    var match;
                    match = regx.exec(this.document.URL);
                    var index1 = match.index;
                    var index2 = match[0].length;
                    this.console.log(`index 1: ${index1} y index 2: ${index2}`);
                    this.console.log(this.document.URL.substr(index1,index2));
                    var array1 = origURL.split(/(&page=[0-9]+)/g);
                    this.console.log(array1);
                    var temp = array1[2];
                    array1[2] = array1[1];
                    array1[1] = temp;
                    origURL = array1.join("");
                }
                var counter = getNum();
                console.log("counter: " + counter);
                num = origURL.substring(origURL.length - counter, origURL.length);
                num++;
                newUrl = origURL.substring(0, origURL.length - counter);
                newUrl = newUrl.concat(num);
                window.location = newUrl;
            }
            else if (origURL.match(/^.*nhentai.net\/g\/[0-9]*\/$/)){
                window.location = origURL.concat("1/");
            }else if (origURL.match(/.*nhentai.net\/g\/[0-9]*\//)){
                return;
            }
            else if (origURL.includes("tag") || origURL == "https://nhentai.net/") {
                newUrl = origURL;
                newUrl = newUrl.concat("?page=2");
                window.location = newUrl;
            }
            else if (!origURL.includes("page")) {
                newUrl = origURL.substring(0, origURL.length - 1);
                newUrl = newUrl.concat("&page=2");
                window.location = newUrl;
            }
        } else if (code === 37 && !origURL.match(/.*nhentai.net\/g\/[0-9]*\//)) {
            //left key
            counter = getNum();
            console.log(counter);
            num = origURL.substring(origURL.length - counter, origURL.length);
            console.log(num);
            num--;
            newUrl = origURL.substring(0, origURL.length - counter);
            newUrl = newUrl.concat(num);
            window.location = newUrl;
        }
    };
})();