// ==UserScript==
// @name         教务系统均分计算
// @version      1.0
// @description  用于电子科技大学教务系统中成绩模块计算均分。
// @author       You
// @match        http://eams.uestc.edu.cn/eams/teach/grade/course/person!historyCourseGrade.action?projectType=MAJOR
// @icon         https://www.google.com/s2/favicons?sz=64&domain=uestc.edu.cn
// @grant        none
// @namespace https://greasyfork.org/users/1044572
// ==/UserScript==
(function() {
'use strict';
//var mark=0;
//var total=0;
//var average=0;
// var trs = document.querySelectorAll('#grid21344342991_data tr');
// for(let j=0;j<trs.length;j++){
//     if(Number.isNaN(trs[j].children[6].textContent-0))
//    {continue;}
//   mark=mark + Number(trs[j].children[5].textContent *1* trs[j].children[6].textContent);
//    total=total + trs[j].children[5].textContent *1;
//console.log(j,average,mark,total);
// }
//    average=mark/total;
// console.log(average.toFixed(2),mark,total);
var heads= document.querySelector('#grid21344342991 > thead > tr');
var total = document.createElement('th');
total.innerHTML="统计";
total.setAttribute("width","3%");
heads.appendChild(total);
var grades = document.querySelector('#grid21344342991_data');
for(let i=0;i<grades.children.length;i++){
let a = document.createElement('td');
let b = document.createElement('input');
b.setAttribute("type","checkbox");
b.onclick=function(e){
e.stopPropagation();
}
a.appendChild(b);
grades.children[i].appendChild(a)
grades.children[i].onclick=function(e){
grades.children[i].children[8].firstChild.checked=!grades.children[i].children[8].firstChild.checked;
}
}
var scores=0;
var num =0;
var fn= function(){
scores=0;
num =0;
for(let i =0;i<grades.children.length;i++){
if(grades.children[i].children[8].firstChild.checked==true){
switch(grades.children[i].children[6].textContent.replace(/[\t\r\f\n\s]*/g, '')){
case 'A':
scores+=Number(grades.children[i].children[5].textContent)*100;
break;
case 'B':
scores+=Number(grades.children[i].children[5].textContent)*85;
break;
case 'C':
scores+=Number(grades.children[i].children[5].textContent)*85;//不清楚
break;
case 'D':
scores+=Number(grades.children[i].children[5].textContent)*85;
break;
case 'P':
scores+=Number(grades.children[i].children[5].textContent)*85;
break;
default:
scores+=Number(grades.children[i].children[6].textContent * grades.children[i].children[5].textContent);
}
num+=Number(grades.children[i].children[5].textContent);
}
}
console.log(num,scores);
}
var temp = document.querySelector('body > div:nth-child(3)')
var btn = document.createElement('button')
btn.textContent="计算均分"
var body = document.querySelector('body')
body.insertBefore(btn,temp)
var r###lt = document.createElement('div')
body.insertBefore(r###lt,temp)
var allChecked = document.createElement('button')
allChecked.textContent="全选"
allChecked.onclick= function(){
for(let i =0;i<grades.children.length;i++){
grades.children[i].children[8].firstChild.checked=true;
}
}
body.insertBefore(allChecked,temp)
var allUnchecked = document.createElement('button')
allUnchecked.textContent="取消全选"
allUnchecked.onclick= function(){
for(let i =0;i<grades.children.length;i++){
grades.children[i].children[8].firstChild.checked=false;
}
}
body.insertBefore(allUnchecked,temp)
btn.onclick=function(){
fn();
if(num==0){
alert("未选择课程");
}else{
r###lt.innerHTML="均分为："+(scores/num).toFixed(2);}
}
})();