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在正方教务成绩页面一键计算平均学分绩点(GPA)
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// ==UserScript==
// @name 整活型GPA计算工具(适用于WHPU正方教务系统)
// @namespace https://github.com/SomeBottle/fastfood
// @version 1.0.2
// @description 在正方教务成绩页面一键计算平均学分绩点(GPA)
// @author SomeBottle
// @match *://*.edu.cn/*
// @icon https://ae01.alicdn.com/kf/Hf7b4a77c0dde45c2b69eb762ddc690236.jpg
// @grant none
// ==/UserScript==
(function () {
'use strict';
var GPAs = false;
const congratuVidURL = 'https://ae01.alicdn.com/kf/Hc2aa6292d6d4434c9204067e12fa4c2df.jpg',
popperVidURL = 'https://ae01.alicdn.com/kf/H6de89a79ee6644fcbc83efaaa6edf0ba6.jpg',
popperAudURL = 'https://ae01.alicdn.com/kf/H90b31944004c48fb9bd38384404ced05N.jpg',
congratuAudURL = 'http://music.163.com/song/media/outer/url?id=396696',
countingAudURL = 'https://ae01.alicdn.com/kf/Hbb784b22951a40708d4f1721f68cafb2b.jpg',
confirmAudURL = 'https://ae01.alicdn.com/kf/H9e546dbd00f84498a5dbd6b9c55cfb42O.jpg',
objectURLs = {},
applyStyle = (elemArr, styleObj) => { // 批量应用样式
elemArr = Array.isArray(elemArr) ? elemArr : [elemArr]; // 支持单一元素
elemArr.forEach(elem => {
if (elem instanceof Element) {
for (let key in styleObj) elem.style[key] = styleObj[key]; // 应用样式
}
});
},
S = (elemID) => document.querySelector(`#${elemID}`); // 按ID拾取元素
/*写正方教务的家伙真是个人才，把数组原型链上的filter方法给改了，你自己加个方法也好啊，非得覆盖，这里用MDN给出的polyfill加回来*/
if (!Array.prototype.myFilter) {
Array.prototype.myFilter = function (func, thisArg) {
'use strict';
if (!((typeof func === 'Function' || typeof func === 'function') && this))
throw new TypeError();
var len = this.length >>> 0,
res = new Array(len), // preallocate array
t = this, c = 0, i = -1;
if (thisArg === undefined) {
while (++i !== len) {
// checks to see if the key was set
if (i in this) {
if (func(t[i], i, t)) {
res[c++] = t[i];
}
}
}
}
else {
while (++i !== len) {
// checks to see if the key was set
if (i in this) {
if (func.call(thisArg, t[i], i, t)) {
res[c++] = t[i];
}
}
}
}
res.length = c; // shrink down array to proper size
return res;
};
}
// Polyfill End
function extractMedia(url, type = 'video/mp4') { // 从图片中提取出媒体
let key = btoa(url),
saved = objectURLs[key];
if (!saved) {
return fetch(url).then(res => res.blob(), rej => Promise.reject(rej))
.then(blob => {
let mediaBlob = blob.slice(70070, blob.size, type), // blob流前70070字节是图片
objURL = URL.createObjectURL(mediaBlob);
objectURLs[key] = objURL;
return Promise.resolve(objURL); // 返回objectURL
})
} else {
return Promise.resolve(saved);
}
}
async function congratulate() {
let mainVideo = S('mainVideo'),
popperVideo = S('popperVideo'),
popperAudio = S('popperAudio'),
pointSpan = S('finalGPA'),
mainAudio = S('mainAudio'),
afterAnimation = () => {
pointSpan.removeEventListener('animationend', afterAnimation, false);
applyStyle(pointSpan, {
'animation': 'bouncy 2s ease-in-out infinite',
'color': '#fbff00'
});
};
pointSpan.style.animation = 'popUp 2s 1 forwards';
pointSpan.addEventListener('animationend', afterAnimation, false);
applyStyle([mainVideo, popperVideo], {
'display': 'block'
});
mainVideo.src = await extractMedia(congratuVidURL);
popperVideo.src = await extractMedia(popperVidURL, 'video/webm');
popperAudio.src = await extractMedia(popperAudURL, 'audio/wav');
mainVideo.play();
popperVideo.play();
mainAudio.play();
popperAudio.play();
}
// Polyfill End
function collectMyGPA() {
let tdElems = document.getElementsByTagName('td'), // 先找到所有的td元素
tBodyElem,
GPACalc = (x) => {
let totalCreditPoint = x.reduce((prev, current) => prev + current.creditPoint, 0), // 求出学分绩点总和
totalCredit = x.reduce((prev, current) => prev + current.credit, 0), // 求出总学分
GPA = totalCreditPoint / totalCredit; // 求出GPA
//console.log(totalCredit, totalCreditPoint);
return GPA.toFixed(3); // 保留三位小数
};
for (let td of tdElems) {
if (td.getAttribute('aria-describedby') == 'tabGrid_cj') { // 找到包含成绩项的列表分量
tBodyElem = td.parentNode.parentNode; // 向上两层找到tbody元素
break;
}
}
if (tBodyElem && tBodyElem.tagName.toLowerCase() == 'tbody') { // 确认上层是tbody元素
let trElems = tBodyElem.getElementsByTagName('tr'), // 找到所有的tr元素
trArr = [],
rows = [];
for (let i of trElems) {
if (i.getAttribute('class') !== 'jqgfirstrow') {
trArr.push(i);
}
}
trArr.forEach(tr => {
let tdElems = tr.getElementsByTagName('td'),
currentObj = {};
for (let td of tdElems) {
switch (td.getAttribute('aria-describedby')) {
case 'tabGrid_kcmc': // 课程名称
currentObj['courseName'] = td.innerText;
break;
case 'tabGrid_kch': // 课程号
currentObj['courseCode'] = td.innerText;
break;
case 'tabGrid_kcxzmc': // 课程性质
currentObj['courseChr'] = td.innerText;
break;
case 'tabGrid_xf': // 学分
currentObj['credit'] = parseFloat(td.innerText);
break;
case 'tabGrid_cj': // 成绩
currentObj['score'] = parseFloat(td.innerText);
break;
case 'tabGrid_jd': // 绩点
currentObj['gradePoint'] = parseFloat(td.innerText);
break;
case 'tabGrid_xfjd': // 学分绩点
currentObj['creditPoint'] = parseFloat(td.innerText);
break;
case 'tabGrid_kcbj': // 课程标记
currentObj['courseMark'] = td.innerText;
break;
}
}
rows.push(currentObj);
});
let rowsCompulsory = rows.myFilter((row) => row['courseChr'].includes('必修')),
rowsElective = rows.myFilter(row => row['courseChr'].includes('选修')),
GPAResults = {
'all': GPACalc(rows), // 注意GPACalc返回值是字符串
'compulsory': GPACalc(rowsCompulsory),
'elective': GPACalc(rowsElective)
};
GPAs = GPAResults;
} else {
GPAs = false;
GPANotice('找不到任何成绩信息诶...')
}
}
function insertDot(str) { // 插入小数点
return str.slice(0, 1) + '.' + str.slice(1);
}
function promiseDuration(audio) { // 等待音频duration属性
return new Promise(res => {
let timer = setInterval(() => {
if (!isNaN(audio.duration)) {
res(audio.duration);
clearInterval(timer);
}
}, 50);
});
}
async function countingAnimation(pointStr) { // 动画效果
console.log('Start counting.');
let drumAudio = document.createElement('audio'), // 小军鼓音频
confirmAudio = document.createElement('audio'), // 确定数字时的音频
zeroFiller = (times, str = '') => {
if (times > 0) {
times -= 1;
str += '0';
return zeroFiller(times, str)
} else {
return str;
}
},
mainAudio = S('mainAudio'),
pointSpan = S('finalGPA'),
closeBtn = S('closeBtn'),
counterTimer,
finalTp = pointStr.replaceAll(/\./g, ''), // 最终去除小数点的GPA字符串
currentTp = zeroFiller(finalTp.length), // 当前去除小数点的GPA字符串
pointer = currentTp.length - 1, // 下标指针
playEnded = () => {
drumAudio.removeEventListener('ended', playEnded, false);
drumAudio.currentTime = 0;
clearInterval(counterTimer);
pointSpan.innerHTML = insertDot(finalTp); // 显示最终绩点
congratulate();
closeBtn.style.display = 'block'; // 显示关闭按钮
setTimeout(() => {
closeBtn.style.opacity = '1';
}, 10);
},
startPlaying = async () => {
let slices = currentTp.length, // 分成几个阶段
duration = await promiseDuration(drumAudio), // 获得音频时长
interval = duration / slices, // 每阶段持续时长
stages = [duration]; // 存放每个阶段的时间
for (let i = 0; i < (slices - 1); i++) {
let last = stages[stages.length - 1];
stages.push(last - interval);
}
mainAudio.src = congratuAudURL; // 预加载主音乐
drumAudio.removeEventListener('play', startPlaying, false);
counterTimer = setInterval(() => {
counting(stages); // 传入存放time阶段数组
}, 10);
},
counting = (stages) => {
let randomNum = Math.floor(Math.random() * 10).toString(), // 获得一个随机数字
beforeParts = currentTp.slice(0, pointer), // 指针前的部分
afterParts = currentTp.slice(pointer + 1), // 指针后的部分
currentTime = drumAudio.currentTime, // 获得音频播放进度
currentStage = stages[pointer]; // 获得当前阶段上限时间
pointSpan.innerHTML = insertDot(beforeParts + randomNum + afterParts);
if (currentTime >= currentStage && pointer > 0) { // 超过当前阶段时间了，指针前移
currentTp = currentTp.slice(0, pointer) + finalTp.slice(pointer, pointer + 1) + currentTp.slice(pointer + 1);
confirmAudio.currentTime = 0;
confirmAudio.play(); // 确认一个数字的时候就播放音频
pointer -= 1; // 指针前移
}
};
drumAudio.src = await extractMedia(countingAudURL, 'audio/mpeg');
confirmAudio.src = await extractMedia(confirmAudURL, 'audio/mpeg');
closeBtn.style.opacity = 0; // 开始动画后暂时隐藏关闭按钮
setTimeout(() => {
closeBtn.style.display = 'none';
}, 500);
drumAudio.addEventListener('ended', playEnded, false); // 监听音频播放结束（结束后展示最终GPA结果）
drumAudio.addEventListener('play', startPlaying, false); // 监听音频播放开始
drumAudio.play(); // 播放小军鼓
}
window.showMyGPA = function (option = false) {
if (!option) { // 有没有选择选项
collectMyGPA(); // 先把各项GPA计算好
if (GPAs) { // 如果能算出GPA
let floatPage = S('GPAFloat'),
optionElem = S('GPAOptions');
applyStyle([floatPage, optionElem], {
'display': 'block'
})
setTimeout(() => {
floatPage.style.opacity = 1;
}, 10);
}
} else { // 点击了选项
let optionElem = S('GPAOptions'),
GPADisplay = S('GPADisplay'),
optionDict = { // 选项映射的GPA类型
1: 'compulsory',
2: 'elective',
3: 'all'
};
optionElem.style.transform = "translate(-50%,-500%)";
setTimeout(() => {
applyStyle([optionElem], {
'display': 'none',
'transform': 'translate(-50%,-50%)'
});// 动画完成后暗中还原
}, 1000);
GPADisplay.style.display = 'block';
setTimeout(() => {
GPADisplay.style.opacity = 1; // 展示GPA的几个数字
}, 10);
countingAnimation(GPAs[optionDict[option]]); // 开始动画
}
}
window.closeFloat = function () { // 关闭浮页
let floatPage = S('GPAFloat'),
GPADisplay = S('GPADisplay'),
pointSpan = S('finalGPA'),
mainVideo = S('mainVideo'),
popperVideo = S('popperVideo'),
popperAudio = S('popperAudio'),
mainAudio = S('mainAudio');
applyStyle([floatPage, GPADisplay], {
'opacity': 0
});
setTimeout(() => {
pointSpan.innerHTML = '0.000';
pointSpan.style.animation = 'none';
pointSpan.style.color = 'black';
applyStyle(pointSpan, {
'animation': 'none',
'color': 'black'
});
applyStyle([floatPage, GPADisplay, mainVideo, popperVideo], {
'display': 'none'
});
popperAudio.pause();
mainAudio.pause();
mainVideo.pause();
popperVideo.pause();
popperAudio.currentTime = 0;
mainAudio.currentTime = 0;
popperVideo.currentTime = 0;
}, 500);
}
window.GPANotice = function (txt) { // 弹出提示窗口
let popElem = S('GPANotice');
popElem.innerHTML = txt;
popElem.style.transform = 'none';
clearInterval(window.GPATimer);
window.GPATimer = setTimeout(() => {
popElem.style.transform = 'translateY(-100%)';
}, 1500);
}
/*渲染HTML元素*/
let GPADiv = document.createElement('div');
GPADiv.id = 'GPADiv';
GPADiv.innerHTML = `<style>
.GPAFloat{
position: fixed;
left:0;
top:0;
width:100%;
height:100%;
z-index:3000;
display:none;
opacity:0;
background-color: rgba(255,255,255,0.5);
transition:.5s ease;
}
.GPAFloat video{
display:none;
width: 100%;
height: 100%;
}
.GPAFloat #popperVideo{
position:fixed;
left:0;
top:0;
z-index:3001;
width:100%;
height:100%;
}
.GPABtn{
position: fixed;
bottom: 0;
left: 0;
border: dashed 2px;
border-radius: .5em;
padding: .5em;
margin: .5em;
transition:.5s ease;
}
.GPABtn:hover{
background-color: #acacac;
}
.GPANotice{
position: fixed;
top:0;
left:0;
width:100%;
height:auto;
background-color: rgba(255,255,255,0.7);
text-align: center;
padding: 1em 0;
font-size: 1.5em;
font-weight: bold;
transition: .5s ease;
z-index:1000;
transform: translateY(-100%);
}
.GPAOptions{
position:fixed;
top:50%;
left:50%;
transform:translate(-50%,-50%);
z-index: inherit;
transition:1s ease;
}
.GPADisplay{
position:fixed;
top:50%;
left:50%;
transform:translate(-50%,-50%);
z-index: inherit;
display:none;
opacity:0;
transition:1s ease;
}
.GPADisplay span{
display:block;
font-size: 4em;
font-weight: bold;
transition: .5s ease;
}
.GPAOptions a{
display:block;
font-size: 2em;
margin: 1em 0;
font-weight: normal;
color: #272727;
transition:.5s ease;
}
.GPAOptions a:hover{
color:#007eff;
text-decoration: none;
}
.closeBtn{
position: fixed;
z-index: 3002;
right: 0;
top: 0;
font-size: 3em;
margin: .5em 1em;
color: black;
transition:.5s ease;
}
.closeBtn:hover{
text-decoration: none;
}
@keyframes bouncy{
0%{
transform: scale(1);
}
50%{
transform: scale(1.5);
}
100%{
transform: scale(1);
}
}
@keyframes popUp{
0%{
font-size:4em;
}
20%{
font-size:8em;
color:#ffeb00;
}
40%{
font-size:2em;
}
50%{
font-size:5em;
}
60%{
transform:rotate(360deg);
}
70%{
transform:translate(10px,10px);
}
72%{
transform:translate(-10px,-10px);
}
74%{
transform:translate(20px,-10px);
}
76%{
transform:translate(0,0);
}
80%{
font-size:8em;
}
100%{
font-size:4em;
color:#ffeb00;
}
}
</style>
<a href="javascript:void(0);" onclick="showMyGPA()" class="GPABtn">算算GPA</a>
<div class="GPANotice" id="GPANotice">Hello</div>
<div class="GPAFloat" id="GPAFloat">
<a href="javascript:void(0);" onclick="closeFloat()" class="closeBtn" id="closeBtn">×</a>
<div class="GPAOptions" id="GPAOptions">
<a href="javascript:void(0);" onclick="showMyGPA(1)">算必修课</a>
<a href="javascript:void(0);" onclick="showMyGPA(2)">算选修课</a>
<a href="javascript:void(0);" onclick="showMyGPA(3)">我全都要</a>
</div>
<div class="GPADisplay" id="GPADisplay">
<span id="finalGPA">0.000</span>
</div>
<video id="mainVideo" src="" style="width:100%;height:100%" loop=true autoplay></video>
<video id="popperVideo" src=""></video>
<audio id="mainAudio"></audio>
<audio id="popperAudio"></audio>
</div>`;
document.body.appendChild(GPADiv); // 渲染到页面上
})();