// ==UserScript==
// @name         Navigator for Reaper Scans/Leviatan Scans/Zero Scans/No Names Scans/KKJ Scans/Edelgarde Scans
// @namespace    secpick.ReaperScans
// @version      0.1
// @description  A navigator to read the various mangas on multiple scan groups. Left arrow for previous chapter, right arrow for next chaper. Home button is back to the overview screen of the manga
// @author       secpick
// @match        https://reaperscans.com/comics/*
// @match        https://leviatanscans.com/comics/*
// @match        https://zeroscans.com/comics/*
// @match        https://the-nonames.com/comics/*
// @match        https://kkjscans.co/comics/*
// @match        https://edelgardescans.com/comics/*
// @grant        none
// @downloadURL none
// ==/UserScript==
 
(function() {
    'use strict';
 
    document.onkeydown = checkKey;
 
    function get_href(which) {
        var btn_class = which == 'home' ? 'fa-home-alt' : 'fa-arrow-' + which
        var btn = document.getElementsByClassName(btn_class)[0]
        if (btn) {
            return btn.parentElement.href
        }
    }
 
    function checkKey(e) {
 
        e = e || window.event;
 
        if (e.keyCode == '39') {
            // right arrow
            window.location = get_href('right') || get_href('home')
        }
        else if (e.keyCode == '37') {
            // left arrow
            window.location = get_href('left') || get_href('home')
        }
        else if (e.keyCode == '36') {
            // home
            window.location = get_href('home')
        }
    }
})();