// ==UserScript==
// @name         轻之国度百度盘无提取码跳转
// @namespace    http://tampermonkey.net/
// @version      1.0.4
// @update       2021.01.20
// @description  在发布的百度网盘链接后添加一个无提取码跳转的链接，需要安装“百度盘分享提取码自动跳转”脚本，否则无法自动输入提取码。由于轻之国度发布者分享链接无固定格式，故可能无法识别到。如果无法识别，请将链接反馈给我，我将尽量适配。
// @author       charghet
// @grant        none
// @run-at  document-start
// @license GPL
// @include https://www.lightnovel.us/detail/*
// @downloadURL none
// ==/UserScript==

(function() {
    var end = false;
    document.onreadystatechange = function(){
        if(document.readyState = 'interactive' && !end){
            var f = function(){
                var urls = document.getElementsByTagName('a');
                for(var i = 0;i < urls.length;i++){
                    var index = -1;
                    if((index = urls[i].href.indexOf("pan.baidu.com/s/")) != -1){
                        var href = urls[i].href;
                        var id = href.substring(index+17,href.length);
                        var node = urls[i].parentNode.childNodes;
                        for(var j = 0;j < node.length;j++){
                            if(node[j] == urls[i]){
                                break;
                            }
                        }
                        var pwd = '';
                        if(j != node.length){
                            var a = document.createElement('a');
                            a.target = "_blank";
                            a.innerText = '无提取码跳转';
                            a.href = "https://pan.baidu.com/share/init?surl="+id+"&pwd=";
                            var n = -1;
                            //提取码跟在链接后
                            try{
                                var s = node[j+1].data;
                                if((n = s.search(/[A-z0-9]{4}/)) != -1 && s.replace(/[A-z0-9]{4}/,'').search(/[A-z0-9]/) == -1){
                                    pwd = s.substring(n,n+4);
                                    a.href += pwd;
                                    urls[i].parentNode.insertBefore(a,node[j+2]);
                                    continue;
                                }
                            }catch(e){};
                            //提取码为链接名
                            s = urls[i].innerText;
                            if((n = s.search(/[A-z0-9]{4}/)) != -1 && s.replace(/[A-z0-9]{4}/,'').search(/[A-z0-9]/) == -1){
                                pwd = s.substring(n,n+4);
                                a.href += pwd;
                                if(j+1 == node.length){
                                    urls[i].parentNode.appendChild(a);
                                }else{
                                    urls[i].parentNode.insertBefore(a,node[j+1]);
                                }
                            }
                        }
                    }
                }
                end = true;
            }
            window.setTimeout(f, 0);
        }
    }
})();