// ==UserScript==
// @name           今日优读
// @description    主要搭建一个知识平台以及读书辅助工具，提供书籍搜索，中图分类和学科搜索。
// @author         018(lyb018@gmail.com)
// @contributor    Rhilip
// @connect        *
// @grant          GM_xmlhttpRequest
// @require        https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js
// @require        https://greasyfork.org/scripts/420063-018-js/code/018js.js?version=890174
// @include        http://book.ucdrs.superlib.net/views/specific/*
// @include        http://product.dangdang.com/*
// @include        https://item.jd.com/*
// @include        https://book.douban.com/subject/*
// @version        0.1.2
// @icon           http://uread.today/static/img/favicon.ico
// @run-at         document-end
// @namespace      http://uread.today
// @downloadURL none
// ==/UserScript==

// This Userscirpt can't run under Greasemonkey 4.x platform
if (typeof GM_xmlhttpRequest === 'undefined') {
    alert('不支持Greasemonkey 4.x，请换用暴力猴或Tampermonkey')
    return
}

;(function () {
    'use strict';

    function addViewOrEmbody(isbnselecter, titleselecter) {
        let match = document.querySelector(isbnselecter).innerText.match(/ISBN.*/)
        if (match) {
            let isbn = match[0].replace(/\D/g, '');
            doGet('http://api.uread.today/master/anon/book/get?isbn=' + isbn, {isbn: isbn}, function(ret, responseDetail, meta) {
                if (ret && ret.resultcode === 1) {
                    $(titleselecter).append('<a target="_blank" href="http://uread.today/book?doi=' + ret.data + '" style="margin-left: 20px !important"><img title="查看" width="15px" src="data:image/jpeg;base64,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"></a>');
                } else {
                    $(titleselecter).append('<a target="_blank" href="http://uread.today/embody?isbn=' + meta.isbn + '" style="margin-left: 20px !important"><img title="收录" width="15px" src="data:image/jpeg;base64,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"></a>');
                }
            }, function(err, meta) {
                console.warn(err)
            });
        }
    }

    $(document).ready(function () {
        if (location.href.includes('http://book.ucdrs.superlib.net/views/specific')) {
            addViewOrEmbody('.tubox dl', '.tutilte');
        } else if (location.href.includes('http://product.dangdang.com')) {
            addViewOrEmbody('#detail_describe', '.name_info h1');
        } else if (location.href.includes('https://item.jd.com')) {
            addViewOrEmbody('.p-parameter-list', '.sku-name');
        } else if (location.href.includes('https://book.douban.com/subject')) {
            addViewOrEmbody('#info', '#wrapper > h1 > span');
        }
    })

    // 判断，空返回空字符串
    function opt(val) {
        if (!val) return '';

        if (val instanceof Array) {
            if (val.length > 0) {
                return val[0];
            }
        } else {
            return val;
        }
    }

    // 对使用GM_xmlhttpRequest返回的html文本进行处理并返回DOM树
    function page_parser(responseText) {
        // 替换一些信息防止图片和页面脚本的加载，同时可能加快页面解析速度
        responseText = responseText.replace(/s+src=/ig, ' data-src='); // 图片，部分外源脚本
        responseText = responseText.replace(/<script[^>]*?>[\S\s]*?<\/script>/ig, ''); //页面脚本
        return (new DOMParser()).parseFromString(responseText, 'text/html');
    }

    // 加载网页
    function loadDoc (url, meta, callback, fail) {
        GM_xmlhttpRequest({
            method: 'GET',
            url: url,
            onload: function (responseDetail) {
                if (responseDetail.status === 200) {
                    let doc = page_parser(responseDetail.responseText)
                    callback(doc, responseDetail, meta)
                } else if (fail){
                    fail(responseDetail, meta);
                }
            },
            onerror: function(err) {
                if (fail) {
                    fail(err, meta);
                }
            }
        })
    }

    // get请求
    function doGet (url, meta, callback, fail) {
        GM_xmlhttpRequest({
            method: 'GET',
            url: url,
            onload: function (responseDetail) {
                if (responseDetail.status === 200) {
                    callback(JSON.parse(responseDetail.responseText), responseDetail, meta)
                } else if (fail){
                    fail(responseDetail, meta);
                }
            },
            onerror: function(err) {
                if (fail) {
                    fail(err, meta);
                }
            }
        })
    }

    // post请求
    function doPost (url, headers, data, meta, callback, fail) {
        GM_xmlhttpRequest({
            method: "POST",
            url: url,
            data: data,
            headers: headers,
            onload: function(responseDetail){
                if (responseDetail.status === 200) {
                    callback(JSON.parse(responseDetail.responseText), responseDetail, meta)
                } else if (fail){
                    fail(responseDetail, meta);
                }
            },
            onerror: function(err) {
                if (fail) {
                    fail(err, meta);
                }
            }
        })
    }
})()