// ==UserScript==
// @name         【伟哥自用】salttiger电子书网盘提取码合成
// @namespace    http://tampermonkey.net/
// @version      0.11
// @description  try to take over the world!
// @author       You
// @match        https://salttiger.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=salttiger.com
// @grant        none
// ==/UserScript==
(function() {
    'use strict';
    function AddpanButton(url,infoarea){
        let btn = document.createElement("button");
        btn.innerHTML = "直达网盘";
        btn.onclick = function(){
            window.open(url);
        }
        infoarea.append(btn);
    }

    function detectBaidupan(){
        /** 针对https://salttiger.com/pandas-in-action/ 这里面超链接也有pan,所以匹配整个'pan.baidu.com'*/
        let baidupan = document.querySelector("a[href*='pan.baidu.com']").href;
        /** https://stackoverflow.com/questions/31773599/can-i-use-an-attribute-selector-for-contains-in-queryselector
         *  Pattern	         Represents
         *  E[foo*="bar"]	 An E element whose foo attribute value contains the substring bar.
         */
        return baidupan;
    }

    function fucksharecode(){
        let baidupan = detectBaidupan();
        let infoarea = document.querySelector("a[href*='pan.baidu.com']").parentNode;
        let textarr = infoarea.textContent.split("\n")
        if(!(typeof infoarea === 'undefined') & textarr.length==4){
            let sharecode = textarr[3].split("：")[1];/** eg.'提取码    ：edxh'*/
            let url = baidupan+"&pwd="+sharecode;/**带提取码的百度网盘链接 */
            console.log(url)
            AddpanButton(url,infoarea);
        }/* sometimes, sharecode is not listed and there is no need to combine them*/
    }

    function isDetailPage(){
        let isdetailpage = false;
        try{
            if(!(typeof detectBaidupan() === 'undefined')){
                isdetailpage = true;
            }
        }catch(err){}
        return isdetailpage;
    }

    if(isDetailPage()==true){/** book detail */
        fucksharecode();
    }

})();

/**
 * ==================================================================================================
 * A UserScript to combine pan.baidu.com and sharecode on salttiger.com
 * ==================================================================================================
 *           本脚本只针对salttiger.com图书详情页中的百度网盘链接处理
 * 在salttiger.com这个电子书分享网站上,百度网盘的链接有时候不带提取码,例如这个页面:
 * https://salttiger.com/principles-of-web-api-design/
 * 本脚本的功能就是把salttiger网站里提取码弄进百度网盘链接,并且加个按钮直达,对于那些
 * 网盘链接里本身自带提取码的,就没必要加,salttiger最近的分享基本都不需要
 */