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course2ics.js
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function genics(firstMonday) {
// Author: @Saafo
// Version: v0.2.0
// Link: https://github.com/Saafo/uestc-coursetable-parser/blob/master/course2ics.js
// License: GPL-3.0 License
const timeTable = [
["0830", "0915"], // startTime, endTime
["0920", "1005"],
["1020", "1105"],
["1110", "1155"],
["1430", "1515"],
["1520", "1605"],
["1620", "1705"],
["1710", "1755"],
["1930", "2015"],
["2020", "2105"],
["2110", "2155"],
["2200", "2245"]
];
const sectionTable = [
{ "section": 1, "startTime": timeTable[0][0], "endTime": timeTable[0][1] },
{ "section": 2, "startTime": timeTable[1][0], "endTime": timeTable[1][1] },
{ "section": 3, "startTime": timeTable[2][0], "endTime": timeTable[2][1] },
{ "section": 4, "startTime": timeTable[3][0], "endTime": timeTable[3][1] },
{ "section": 5, "startTime": timeTable[4][0], "endTime": timeTable[4][1] },
{ "section": 6, "startTime": timeTable[5][0], "endTime": timeTable[5][1] },
{ "section": 7, "startTime": timeTable[6][0], "endTime": timeTable[6][1] },
{ "section": 8, "startTime": timeTable[7][0], "endTime": timeTable[7][1] },
{ "section": 9, "startTime": timeTable[8][0], "endTime": timeTable[8][1] },
{ "section": 10, "startTime": timeTable[9][0], "endTime": timeTable[9][1] },
{ "section": 11, "startTime": timeTable[10][0], "endTime": timeTable[10][1] },
{ "section": 12, "startTime": timeTable[11][0], "endTime": timeTable[11][1] },
];
function dateToStr(date) { // format date to YYYYMMDD
return String(date.getFullYear()) +
String(date.getMonth() > 8 ? "" + (date.getMonth() + 1) : "0" + (date.getMonth() + 1)) +
String(date.getDate() > 9 ? "" + date.getDate() : "0" + date.getDate());
};
function strToDate(str) {
let date = new Date();
date.setFullYear(Number(str.slice(0, 4)), Number(str.slice(4, 6)) - 1, Number(str.slice(6, 8)));
return date;
};
function timeToStr(date) {
return String(date.getHours() > 9 ? "" + date.getHours() : "0" + date.getHours()) +
String(date.getMinutes() > 9 ? "" + date.getMinutes() : "0" + date.getMinutes()) +
String(date.getSeconds() > 9 ? "" + date.getSeconds() : "0" + date.getSeconds());
};
// function begins here
// format firstMonday
if (Number(firstMonday.slice(4, 6)) > 12 || Number(firstMonday.slice(6, 8) > 31)) {
console.error("开始日期不合法");
return;
}
// firstMonday String to Date
const constFirstMonday = strToDate(firstMonday);
if (constFirstMonday.getDay() != 1) {
console.error("参数为第一周的周一日期，格式如:'20200907'");
return;
}
// format to ics
// head of ics
var icsString =
"BEGIN:VCALENDAR\n\
METHOD:PUBLISH\n\
VERSION:2.0\n\
X-WR-CALNAME:课表\n\
PRODID:-//Saafo//github.com/Saafo/uestc-coursetable-parser/blob/master/course2ics.js 0.2.0//CN\n\
X-WR-TIMEZONE:Asia/Shanghai\n\
CALSCALE:GREGORIAN\n\
BEGIN:VTIMEZONE\n\
TZID:Asia/Shanghai\n\
BEGIN:STANDARD\n\
TZOFFSETFROM:+0800\n\
DTSTART:19890917T020000\n\
TZNAME:GMT+8\n\
TZOFFSETTO:+0800\n\
END:STANDARD\n\
END:VTIMEZONE\n\
"
// event of ics
let i = 0;
for (; i < 84; i++) {
if ($("#TD" + i + "_0")[0].title != "") {
let item = {};
let rawString = $("#TD" + i + "_0")[0].title;// str of class
let span = $("#TD" + i + "_0")[0].getAttribute('rowspan');// length of class
item.teacher = rawString.split(" ")[0];
item.name = rawString.split(" ")[1].split("(")[0];
// let courseId = rawString.split("(")[1].split(")")[0];
let weeksAndPlace = rawString.split(";")[1].split("(")[1].split(")")[0];
let rawWeeks = weeksAndPlace.split(",")[0];
if (weeksAndPlace.split(",")[1] !== undefined) {
item.position = weeksAndPlace.split(",")[1];
} else {
item.position = "暂无地点";
}
// parse weeks
item.weeks = []
weekParts = rawWeeks.split(" ");
for (let weekPartIndex in weekParts) {
let weekPart = weekParts[weekPartIndex]
// type 0: 1-17
if (weekPart[0] != "单" && weekPart[0] != "双") {
if (weekPart.indexOf("-") > 0) {
let startWeek = Number(weekPart.split("-")[0])
let endWeek = Number(weekPart.split("-")[1])
for (let j = startWeek; j <= endWeek; j++) {
item.weeks.push(j)
}
} else { // weekPart doesn't include "-", single week
// type 2: 7
item.weeks.push(Number(weekPart));
}
}
// type 1: 单1-17 or 双2-16
else { // if (weekPart[0] == "单" || weekPart[0] == "双")
let startWeek = Number(weekPart.slice(1).split("-")[0]);
let endWeek = Number(weekPart.split("-")[1]);
for (let j = startWeek; j <= endWeek; j = j + 2) {
item.weeks.push(j);
}
}
}
// parse day
item.day = Math.floor(i / 12) + 1;
// parse sections
item.sections = [];
let currentSection = i % 12;
item.sections.push(sectionTable[currentSection]);
while (--span > 0) {
// guard in same day and countinued same class
++i; ++currentSection;
item.sections.push(sectionTable[currentSection]);
};
// judge repeat type
if (weekParts.length == 1) {
if (weekParts[0][0] != "单" && weekParts[0][0] != "双") {
if (weekParts[0].indexOf("-") > 0) {
item.repeatType = 0; // simple repetition
} else {
item.repeatType = 2; // single / no repetition
}
} else {
item.repeatType = 1; // odd / even repetition
}
} else {
item.repeatType = 3; // multi repetition
item.exDate = [];
for (let i = item.weeks[0]; i < item.weeks[item.weeks.length - 1]; i++) {
if (item.weeks.indexOf(i) == -1) {
tempDate = new Date();
tempDate.setDate(constFirstMonday.getDate() + (i - 1) * 7 + item.day - 1);
item.exDate.push(dateToStr(tempDate)); //format to YYYYMMDD
}
}
}
// turn item into icsString
let currentTime = new Date();
let currentTimeStr = dateToStr(currentTime) + "T" + timeToStr(currentTime);
icsString += "BEGIN:VEVENT\nTRANSP:OPAQUE\nSEQUENCE:1";
icsString += "\nCREATED:" + currentTimeStr;
icsString += "Z\nDTSTAMP:" + currentTimeStr;
icsString += "Z\nLAST-MODIFIED:" + currentTimeStr;
icsString += "Z\nUID:" + 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
icsString += "\nSUMMARY:" + item.name;
if (item.position != "暂无地点") {
icsString += "\nLOCATION:" + item.position;
};
icsString += "\nDESCRIPTION:教师：" + item.teacher;
let tempStartDate = new Date(constFirstMonday);
tempStartDate.setDate(constFirstMonday.getDate() + (item.weeks[0] - 1) * 7 + item.day - 1)
icsString += "\nDTSTART;TZID=Asia/Shanghai:" + dateToStr(tempStartDate) + "T" + item.sections[0].startTime + "00";
icsString += "\nDTEND;TZID=Asia/Shanghai:" + dateToStr(tempStartDate) + "T" + item.sections[item.sections.length - 1].endTime + "00";
let tempEndDate = new Date(constFirstMonday);
tempEndDate.setDate(constFirstMonday.getDate() + (item.weeks[item.weeks.length - 1] - 1) * 7 + item.day - 1);
// repeat rule
if (item.repeatType != 2) { // repetition
icsString += "\nRRULE:FREQ=WEEKLY;INTERVAL=";
if (item.repeatType == 1) { // odd / even
icsString += "2";
} else { // interval = 1
icsString += "1";
}
icsString += ";UNTIL=" + dateToStr(tempEndDate) + "T" + "235959Z\n"
// exdate
if (item.repeatType == 3) { //multi repetition
for (let extra in item.exDate) {
icsString += "EXDATE;TZID=Asia/Shanghai:" + item.exDate[extra] + "T" + item.sections[0].startTime + "00\n";
}
}
}
icsString += "END:VEVENT\n";
}
}
// tail of ics
icsString += "END:VCALENDAR"
// generate ics file
var element = document.createElement('a');
element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(icsString));
element.setAttribute('download', '课表.ics');
element.style.display = 'none';
document.body.appendChild(element);
element.click();
document.body.removeChild(element);
};
genics('20210301');