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SJTU-Course Selection Assistant

添加一个打开选课社区(course.sjtu.plus)的按钮

当前为 2022-05-16 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         SJTU-Course Selection Assistant
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.3.0
  5. // @description  添加一个打开选课社区(course.sjtu.plus)的按钮
  6. // @author       Me
  7. // @match        https://i.sjtu.edu.cn/xsxk/zzxkyzb_cxZzxkYzbIndex.html*
  8. // @connect f002.backblazeb2.com
  9. // @grant GM_setValue
  10. // @grant GM_getValue
  11. // @grant GM_xmlhttpRequest
  12. // @homepageURL https://github.com/dzx-dzx/Course-Selection-Assistant
  13. // @license Apache
  14. // ==/UserScript==
  15.  
  16. (async function () {
  17.     'use strict';
  18.     // Your code here...
  19.     
  20.     function showHideJxb(obj){
  21.         if($(obj).children(".expand_close").attr("class").indexOf("expand1")>0){
  22.             $(obj).children(".expand_close").removeClass('expand1').addClass('close1');
  23.             $(obj).next(".panel-body").slideDown();
  24.         }else{
  25.             $(obj).children(".expand_close").removeClass('close1').addClass('expand1');
  26.             $(obj).next(".panel-body").slideUp();
  27.         }
  28.     }
  29.     addJS_Node (showHideJxb);
  30.     function addJS_Node (text, s_URL, funcToRun, runOnLoad) {
  31.         var D                                   = document;
  32.         var scriptNode                          = D.createElement ('script');
  33.         if (runOnLoad) {
  34.             scriptNode.addEventListener ("load", runOnLoad, false);
  35.         }
  36.         scriptNode.type                         = "text/javascript";
  37.         if (text)       scriptNode.textContent  = text;
  38.         if (s_URL)      scriptNode.src          = s_URL;
  39.         if (funcToRun)  scriptNode.textContent  = '(' + funcToRun.toString() + ')()';
  40.  
  41.         var targ = D.getElementsByTagName ('head')[0] || D.body || D.documentElement;
  42.         targ.appendChild (scriptNode);
  43.     }
  44.     
  45.     const courseToIdRaw = (await (async () => {
  46.         const courseListTimestampResponse = await new Promise((resolve, reject) => {
  47.             GM_xmlhttpRequest({
  48.                 method: "GET",
  49.                 url: "https://f002.backblazeb2.com/file/course/course.json",
  50.                 headers: { "Range": "bytes=0-0" },
  51.                 onload: function (response) { resolve(response) }
  52.             })
  53.         })
  54.         const latestCourseListTimestamp = parseInt(courseListTimestampResponse.responseHeaders.split('\n').filter((i,/*教务系统似乎私自修改了Array的原型*/s) => s.includes("x-bz-info-src_last_modified_millis"))[0].split(":")[1])
  55.         if (GM_getValue('course_list_timestamp') !== latestCourseListTimestamp) {
  56.             const courseListResponse = await new Promise((resolve, reject) => {
  57.                 GM_xmlhttpRequest({
  58.                     method: "GET",
  59.                     url: "https://f002.backblazeb2.com/file/course/course.json",
  60.                     onload: function (response) { resolve(response) }
  61.                 })
  62.             })
  63.             const courseToIdRaw = JSON.parse(courseListResponse.response)
  64.             GM_setValue("course_list", courseToIdRaw)
  65.             GM_setValue("course_list_timestamp", latestCourseListTimestamp)
  66.             return courseToIdRaw
  67.         }
  68.         else return GM_getValue("course_list")
  69.     })())
  70.  
  71.     const courseToIdMap = new Map(Object.entries(courseToIdRaw))
  72.  
  73.     function addButton(tr) {
  74.         const classCodeRaw = tr.querySelector("td.jxbmc").textContent
  75.         const classCode = classCodeRaw.split("-").at(-2)//什么你说兼容性?能吃吗?
  76.  
  77.         if (!courseToIdMap.has(classCode)) {
  78.             console.warn(`课程${classCode}无法找到,请向开发者联系.`); return;
  79.         }
  80.         const classes = courseToIdMap.get(classCode)
  81.  
  82.         const teachers = Array.from(tr.querySelector("td.jsxmzc").querySelectorAll("a"), a => a.textContent)
  83.  
  84.         const id = teachers.reduce((pre, teacher) => {
  85.             if (pre != null) return pre
  86.             const res = classes.find((c) => c.teacher === teacher)
  87.             if (res) return res.id
  88.             else return null
  89.         }, null)
  90.  
  91.         if (!id) {
  92.             console.warn(`课程${classCode}下教师${teachers}均未找到,请向开发者联系.`); return;
  93.         }
  94.  
  95.         const button = document.createElement("button")
  96.         button.onclick = function () { window.open(`https://course.sjtu.plus/course/${id}`, "_blank"/*始终新建窗口,改成"course"以覆盖前一窗口*/) }
  97.         button.setAttribute("class", "btn btn-primary btn-sm")
  98.         button.textContent = "跳转到选课社区"
  99.         tr.querySelector("td.jxbmc").append(document.createElement("br"), button)
  100.     }
  101.     document.querySelectorAll("div.panel-body > table > tbody > tr ").forEach((tr => {
  102.         if (tr.querySelector(".kkxymc").textContent !== "") addButton(tr)
  103.     }))
  104.  
  105.     const observer = new MutationObserver((mutationList) => {
  106.         mutationList.forEach((mutation) => { if (mutation.target.getAttribute("class") === "kkxymc") addButton(mutation.target.parentElement) })
  107.     })
  108.     observer.observe(document.querySelector("#displayBox"), { "childList": true, "subtree": true })
  109.  
  110. })();