// ==UserScript==
// @name         轻之国度百度盘无提取码跳转
// @namespace    http://tampermonkey.net/
// @version      1.0.5
// @update       2021.02.21
// @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 article = document.getElementById('article-main-contents');
                var nodes = article.childNodes;
                for(var i = 0;i < nodes.length;i++){
                    if(nodes[i].nodeName == 'A'){
                        var href = nodes[i].href;
                    }else if(nodes[i].nodeName == '#text'){
                        href = nodes[i].data;
                    }else{
                        continue;
                    }
                    var index = -1;
                    if((index = href.indexOf("pan.baidu.com/s/")) != -1){
                        var id = href.substring(index+17,index+39);
                        var pwd = '';
                        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 pwdIndex = i + 1;
                            if(nodes[pwdIndex].tagName == 'BR'){
                                pwdIndex += 1;
                            }
                            var s = nodes[pwdIndex].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;
                                article.insertBefore(a,nodes[pwdIndex+1]);
                                continue;
                            }
                        }catch(e){};
                        //提取码为链接名
                        if(pwd == ''){
                            if((n = href.search(/[A-z0-9]{4}/)) != -1 && href.replace(/[A-z0-9]{4}/,'').search(/[A-z0-9]/) == -1){
                                pwd = href.substring(n,n+4);
                                a.href += pwd;
                                article.insertBefore(a,nodes[i+1]);
                            }
                        }
                        //提取码在链接中
                        if(pwd == ''){
                            href = href.substring(47);
                            if((n = href.search(/[A-z0-9]{4}/)) != -1 && href.replace(/[A-z0-9]{4}/,'').search(/[A-z0-9]/) == -1){
                                pwd = href.substring(n,n+4);
                                a.href += pwd;
                                article.insertBefore(a,nodes[i+1]);
                            }
                        }
                    }
                }
                end = true;
            }
            window.setTimeout(f, 0);
        }
    }
})();