js 常用时间处理函数

import moment from 'moment'
// 前面添加0方法
export  function add0(m){
    
    return m<10?'0'+m:m
}

export function parseTime(time) {
    
    if (time) {
    
        const date = new Date(time)
        const year = date.getFullYear()
        /* 在日期格式中，月份是从0开始的，因此要加0 * 使用三元表达式在小于10的前面加0，以达到格式统一 如 09:11:05 * */
        const month = date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1
        const day = date.getDate() < 10 ? '0' + date.getDate() : date.getDate()
        const hours = date.getHours() < 10 ? '0' + date.getHours() : date.getHours()
        const minutes = date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()
        const seconds = date.getSeconds() < 10 ? '0' + date.getSeconds() : date.getSeconds()
        // 拼接
        return year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds
    } else {
    
        return ''
    }
}

// 获取某月天数
export function getMonthDays(year, month) {
    
    var new_year = year; //取当前的年份
    var nextMonth = month++;
    if (month>12) {
    
        nextMonth -=12; //月份减
        new_year++; //年份增
    }
    var nextMonthFirstDay=new Date(new_year,nextMonth,1);//下个月第一天
    var oneDay=1000*60*60*24;
    var dateString=new Date(nextMonthFirstDay-oneDay);
    var dateTime = dateString.getDate();
    return dateTime;
};

// 获取上个月第一天
export  function getPriorMonthFirstDay(year, month) {
    
    //年份为0代表,是本年的第一月,所以不能减
    if (month == 0) {
    
        month = 11; //月份为上年的最后月份
        year--; //年份减1
        return new Date(year, month, 1);
    }
    //否则,只减去月份
    month--;
    return new Date(year, month, 1);
};

// 获取当天开始时间结束时间
export function getTodayDate(){
    
    var today = [];
    var todayDate = new Date();
    var y = todayDate.getFullYear();
    var m = todayDate.getMonth() + 1;
    var d = todayDate.getDate();
    var s = y+'-'+add0(m)+'-'+add0(d)+' 00:00:00';//今日开始
    var e = y+'-'+add0(m)+'-'+add0(d)+' 23:59:59';//今日结束
    today.push(s);
    today.push(e);
    return(today);
}

// 获取昨天时间
export function getYesterdayDate(){
    
    var dateTime = [];
    var today = new Date();
    var yesterday = new Date(today.setTime(today.getTime()-24*60*60*1000));
    var y = yesterday.getFullYear();
    var m = yesterday.getMonth() + 1;
    var d = yesterday.getDate();
    var s = y+'-'+add0(m)+'-'+add0(d)+' 00:00:00';//开始
    var e = y+'-'+add0(m)+'-'+add0(d)+' 23:59:59';//结束
    dateTime.push(s);
    dateTime.push(e);
    return(dateTime);
}

// 获取本周开始时间结束时间
export function getCurrentWeek(){
    
    const startStop = new Array();
    //获取当前时间
    const currentDate = new Date();
    //返回date是一周中的某一天
    const week = currentDate.getDay();
    //返回date是一个月中的某一天
    const month = currentDate.getDate();
    //一天的毫秒数
    const millisecond = 1000 * 60 * 60 * 24;
    //减去的天数
    const minusDay = week != 0 ? week - 1 : 6;
    //alert(minusDay);
    //本周 周一
    const monday = new Date(currentDate.getTime() - (minusDay * millisecond));
    //本周 周日
    const sunday = new Date(monday.getTime() + (6 * millisecond));
    const sy = monday.getFullYear();
    const sm = monday.getMonth() + 1;
    const sd = monday.getDate();
    const ey = sunday.getFullYear();
    const em = sunday.getMonth() + 1;
    const ed = sunday.getDate();
    const s = sy+'-'+add0(sm)+'-'+add0(sd)+' 00:00:00';//开始
    const e = ey+'-'+add0(em)+'-'+add0(ed)+' 23:59:59';//结束
    startStop.push(s);
    startStop.push(e);
    return startStop;
}

// 获取上周时间
export function getLastWeek(){
    
    //起止日期数组
    const startStop = new Array();
    //获取当前时间
    const currentDate = new Date();
    //返回date是一周中的某一天
    const week = currentDate.getDay();
    //返回date是一个月中的某一天
    const month = currentDate.getDate();
    //一天的毫秒数
    const millisecond = 1000 * 60 * 60 * 24;
    //减去的天数
    const minusDay = week != 0 ? week - 1 : 6;
    //获得当前周的第一天
    const currentWeekDayOne = new Date(currentDate.getTime() - (millisecond * minusDay));
    //上周最后一天即本周开始的前一天
    const priorWeekLastDay = new Date(currentWeekDayOne.getTime() - millisecond);
    //上周的第一天
    const priorWeekFirstDay = new Date(priorWeekLastDay.getTime() - (millisecond * 6));
    const sy = priorWeekFirstDay.getFullYear();
    const sm = priorWeekFirstDay.getMonth() + 1;
    const sd = priorWeekFirstDay.getDate();
    const ey = priorWeekLastDay.getFullYear();
    const em = priorWeekLastDay.getMonth() + 1;
    const ed = priorWeekLastDay.getDate();
    const s = sy+'-'+add0(sm)+'-'+add0(sd)+' 00:00:00';//开始
    const e = ey+'-'+add0(em)+'-'+add0(ed)+' 23:59:59';//结束
    startStop.push(s);
    startStop.push(e);
    return startStlet
}

//获取本月时间
export function getCurrentMonth(){
    
    //起止日期数组
    let startStop = new Array();
    //获取当前时间
    let currentDate = new Date();
    //获得当前月份0-11
    let currentMonth = currentDate.getMonth();
    //获得当前年份4位年
    let currentYear = currentDate.getFullYear();
    //求出本月第一天
    let firstDay = new Date(currentYear, currentMonth, 1);
    //当为12月的时候年份需要加1
    //月份需要更新为0 也就是下一年的第一个月
    if (currentMonth == 11) {
    
        currentYear++;
        currentMonth = 0; //就为
    } else {
    
        //否则只是月份增加,以便求的下一月的第一天
        currentMonth++;
    }
    //一天的毫秒数
    let millisecond = 1000 * 60 * 60 * 24;
    //下月的let
    let nextMonthDayOne = new Date(currentYear, currentMonth, 1);
    //求出上月的最后一天
    let lastDay = new Date(nextMonthDayOne.getTime() - millisecond);
    let sy = firstDay.getFullYear();
    let sm = firstDay.getMonth() + 1;
    let sd = firstDay.getDate();
    let ey = lastDay.getFullYear();
    let em = lastDay.getMonth() + 1;
    let ed = lastDay.getDate();
    let s = sy+'-'+add0(sm)+'-'+add0(sd)+' 00:00:00';//开始
    let e = ey+'-'+add0(em)+'-'+add0(ed)+' 23:59:59';//结束
    startStop.push(s);
    startStop.push(e);
    return startStop;
}

// 获取上月时间
export function getLastMonth(){
    
    let startStop = new Array();
    //获取当前时间
    let currentDate = new Date();
    //获得当前月份0-11
    let currentMonth = currentDate.getMonth();
    //获得当前年份4位年
    let currentYear = currentDate.getFullYear();
    //获得上一个月的第一天
    let priorMonthFirstDay = getPriorMonthFirstDay(currentYear, currentMonth);
    //获得上一月的最后一天
    let priorMonthLastDay = new Date(priorMonthFirstDay.getFullYear(), priorMonthFirstDay.getMonth(), getMonthDays(priorMonthFirstDay.getFullYear(), priorMonthFirstDay.getMonth()));
    let sy = priorMonthFirstDay.getFullYear();
    let sm = priorMonthFirstDay.getMonth() + 1;
    let sd = priorMonthFirstDay.getDate();
    let ey = priorMonthLastDay.getFullYear();
    let em = priorMonthLastDay.getMonth() + 1;
    let ed = priorMonthLastDay.getDate();
    let s = sy+'-'+add0(sm)+'-'+add0(sd)+' 00:00:00';//开始
    let e = ey+'-'+add0(em)+'-'+add0(ed)+' 23:59:59';//结束
    startStop.push(s);
    startStop.push(e);
    return startStop;
}


// 不能选择今天之前的时间
// 判断传入时间是否小于今天0时0分0秒0毫秒的时间戳
// 如果不传入参数，则传入null，即用moment()来比较
// setHours用于设置指定的(小时[, 分钟[, 秒[, 毫秒]]])
// dateObj.setHours(hoursValue[, minutesValue[, secondsValue[, msValue]]])
// 如果不指定 minutesValue，secondsValue 和 msValue 参数，则会使用getMinutes()，getSeconds() 和getMilliseconds() 方法的返回值。
// 组件用法{/* 不能选择今天之前的日期 */}
// <DatePicker
// showTime
// allowClear
// disabledDate={isBefore}
// style={
    { width: '100%' }}
// ></DatePicker>
export function isBefore(date) {
    
    const today = new Date().setHours(0, 0, 0, 0)
    return moment(date).isBefore(today)
}


/* 格式化日期 */
export function formateDate(time) {
    
    if (!time) return ''
    let date = new Date(time)
    return date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate() +
        ' ' + date.getHours() + ':' + date.getMinutes() + ':' + date.getSeconds()
}


// 倒计时
// 函数接收两个参数，当前时间和结束时间（使用毫秒）。调用一次后，时间会开始倒计时~
export const countDown = (current, ends) => {
    
    const leftTime = ends - current;
    let [h, m, s] = ['00', '00', '00'];
    if (leftTime >= 0) {
    
        h =
            Math.floor((leftTime / 1000 / 60 / 60) % 24) >= 10
                ? Math.floor((leftTime / 1000 / 60 / 60) % 24)
                : `0${
      Math.floor((leftTime / 1000 / 60 / 60) % 24)}`;
        m =
            Math.floor((leftTime / 1000 / 60) % 60) >= 10
                ? Math.floor((leftTime / 1000 / 60) % 60)
                : `0${
      Math.floor((leftTime / 1000 / 60) % 60)}`;
        s =
            Math.floor((leftTime / 1000) % 60) >= 10
                ? Math.floor((leftTime / 1000) % 60)
                : `0${
      Math.floor((leftTime / 1000) % 60)}`;
    }
    setTimeout(countDown, 1000);
}

// 获取当前年月季度
export const getYearSeason =()=>{
    
    const nowDate = new Date()
    const y = nowDate.getFullYear()  // 年
    const currMonth = nowDate.getMonth() + 1  //月
    const currQuarter = Math.floor((currMonth % 3 === 0 ? (currMonth / 3) : (currMonth / 3 + 1)))  // 季度
    return {
    y,currQuarter,currMonth}
}