// ==UserScript==
// @name         志愿云，日期自动填写脚本
// @namespace    https://penicillin.github.io/
// @description  对4个日期框做数据同步，修改起始日期会默认对结束日期+7。
// @version      0.1.7
// @match        http://www.fjvs.org/app/opp/*
// @downloadURL none
// ==/UserScript==
document.body.style.fontSize="1em";

function addDate(date, days) {
     if (days == undefined || days == '') {
         days = 0;
     }
    return new Date(date.valueOf()+ days * 24 * 60 * 60 * 1000);

}
function getFormatedDate(str){
var DateStr=str.split('-');
return new Date(DateStr[0],DateStr[1]-1,DateStr[2]);
}

var titileStringEL=document.getElementById('opp_name');

var userV1y=document.getElementById('opp_start_date_year');
var userV1m=document.getElementById('opp_start_date_month');
var userV1d=document.getElementById('opp_start_date_day');

var userV2y=document.getElementById('opp_end_date_year');
var userV2m=document.getElementById('opp_end_date_month');
var userV2d=document.getElementById('opp_end_date_day');

var userV3y=document.getElementById('opp_recruit_start_date_year');
var userV3m=document.getElementById('opp_recruit_start_date_month');
var userV3d=document.getElementById('opp_recruit_start_date_day');

var userV4y=document.getElementById('opp_recruit_end_date_year');
var userV4m=document.getElementById('opp_recruit_end_date_month');
var userV4d=document.getElementById('opp_recruit_end_date_day');

userV3y.parentNode.style.opacity='0.3';//灰色显示

function setOtherDate(){
var calcDate=addDate(new Date(userV1y.value,userV1m.value-1,userV1d.value),6);
userV2y.value=calcDate.getFullYear()
userV2m.value=calcDate.getMonth()+1;
userV2d.value=calcDate.getDate();
userV3y.value=userV1y.value;
userV3m.value=userV1m.value;
userV3d.value=userV1d.value;
userV4y.value=userV2y.value;
userV4m.value=userV2m.value;
userV4d.value=userV2d.value;
}

function setAllDate(){
var titileStringDate=getFormatedDate(titileStringEL.value.match(/(\(=?)(\S*)(?=\))/)[2]);//拿到标题日期字符串并转为日期格式
var startDate=addDate(titileStringDate, -6);//初始化日期为结束前的6天
userV1y.value=startDate.getFullYear();//设置起始日期-年
userV1m.value=startDate.getMonth()+1;//设置起始日期-月
userV1d.value=startDate.getDate();//设置起始日期-日
setOtherDate();//设置其余日期
}

titileStringEL.addEventListener('keyup',function(){setAllDate()});//注册事件
userV1y.addEventListener('change',function(){userV3y.value=userV1y.value;setOtherDate()});//注册事件
userV1m.addEventListener('change',function(){userV3m.value=userV1m.value;setOtherDate()});//注册事件
userV1d.addEventListener('change',function(){userV3d.value=userV1d.value;setOtherDate()});//注册事件

userV2y.addEventListener('change',function(){userV4y.value=userV2y.value});//注册事件
userV2m.addEventListener('change',function(){userV4m.value=userV2m.value});//注册事件
userV2d.addEventListener('change',function(){userV4d.value=userV2d.value});//注册事件

setAllDate();