/*
@desc：时间日期函数集合
@author [Lee] <[]>
*/
function datetime(){
/*
 @desc：内部方法，不足10补0
 @param input 传入数值
 @return ret 转换后的数值
 */
this.parsetime = function(input){
    var ret
    if(input >= 0 && input < 10){
        ret = '0'+input
    }else{
        ret = input
    }
    return ret
}
/*
 @desc：时间缀转时间
 @param time 时间缀，10位
 @return ret 时间，格式为：2018-01-01 00:00:00
 */ this.timetostr = function(time){
    var time = (time)?(time):(Math.round(new Date().getTime()/1000))
    var date = new Date(time*1000)
    var year = this.parsetime(date.getFullYear())
    var month = this.parsetime(date.getMonth()+1)
    var day = this.parsetime(date.getDate())
    var hour = this.parsetime(date.getHours())
    var minute = this.parsetime(date.getMinutes())
    var second = this.parsetime(date.getSeconds())
    var ret = year+'-'+month+'-'+day+' '+hour+':'+minute+':'+second
    return ret
}
/*
 @desc：时间转时间缀
 @param str 时间字符串
 @return time 时间缀
 */
this.strtotime = function(str){
    var date = new Date(str)
    var year = this.parsetime(date.getFullYear())
    if(/^\d{4}(-\d{2}(-\d{2})?)?\s\d{2}:\d{2}(:)?(\d{2})?$/.test(str)){
        var month = this.parsetime(date.getMonth()+1)
        var day = this.parsetime(date.getDate())
        var hour = this.parsetime(date.getHours())
        var minute = this.parsetime(date.getMinutes())
        var second = this.parsetime(date.getSeconds())
    }else{
        var month = this.parsetime(date.getUTCMonth()+1)
        var day = this.parsetime(date.getUTCDate())
        var hour = this.parsetime(date.getUTCHours())
        var minute = this.parsetime(date.getUTCMinutes())
        var second = this.parsetime(date.getUTCSeconds())
    }
    str = year+'-'+month+'-'+day+' '+hour+':'+minute+':'+second
    date = new Date(str)
    var time = date.getTime().toString()
    time = time.slice(0,10)
    return time
}
/*
 @desc：求时间差
 @param sstr 开始时间，字符串
 @param estr 结束时间，字符串
 @return ret 时间差，单位：秒
 */
this.timediff = function(sstr,estr){
    var stime = this.strtotime(sstr)
    var etime = this.strtotime(estr)
    var ret = etime - stime
    return ret
}
/*
 @desc：时间相加函数
 @param dur 差数，如：-1year +2month
 @param time 时间，1、时间缀；2、时间字符串
 @return ret 得出的时间，格式为：2018-01-01 00:00:00
 */
this.dateadd = function(dur,time = false){
    var test_year = /(-)?\d+(\s)?year(s)?/.exec(dur)
    var test_month = /(-)?\d+(\s)?month(s)?/.exec(dur)
    var test_day = /(-)?\d+(\s)?day(s)?/.exec(dur)
    var test_hour = /(-)?\d+(\s)?hour(s)?/.exec(dur)
    var test_minute = /(-)?\d+(\s)?minute(s)?/.exec(dur)
    var test_second = /(-)?\d+(\s)?second(s)?/.exec(dur)
    test_year = (!test_year)?0:parseInt(test_year[0])
    test_month = (!test_month)?0:parseInt(test_month[0])
    test_day = (!test_day)?0:parseInt(test_day[0])
    test_hour = (!test_hour)?0:parseInt(test_hour[0])
    test_minute = (!test_minute)?0:parseInt(test_minute[0])
    test_second = (!test_second)?0:parseInt(test_second[0])
    var outtime
    if(time){
        if(((typeof(time)=='string') || (time instanceof String)) && (/^\d{4}(-\d{2}(-\d{2})?)?(\s)?(\d{2})?(:)?(\d{2})?(:)?(\d{2})?$/.test(time))){
            outtime = new Date(time)
            outtime.setFullYear(parseInt(outtime.getFullYear()) + test_year)
            outtime.setMonth(parseInt(outtime.getMonth()) + test_month)
            outtime.setDate(parseInt(outtime.getDate()) + test_day)
            outtime.setHours(parseInt(outtime.getHours()) + test_hour)
            outtime.setMinutes(parseInt(outtime.getMinutes()) + test_minute)
            outtime.setSeconds(parseInt(outtime.getSeconds()) + test_second)
            var month = this.parsetime(parseInt(outtime.getUTCMonth())+1)
            var date = this.parsetime(parseInt(outtime.getUTCDate()))
            var hour = this.parsetime(parseInt(outtime.getUTCHours()))
            var minute = this.parsetime(parseInt(outtime.getUTCMinutes()))
            var second = this.parsetime(parseInt(outtime.getUTCSeconds()))
        }else{
            outtime = new Date(time*1000)
            outtime.setFullYear(parseInt(outtime.getFullYear()) + test_year)
            outtime.setMonth(parseInt(outtime.getMonth()) + test_month)
            outtime.setDate(parseInt(outtime.getDate()) + test_day)
            outtime.setHours(parseInt(outtime.getHours()) + test_hour)
            outtime.setMinutes(parseInt(outtime.getMinutes()) + test_minute)
            outtime.setSeconds(parseInt(outtime.getSeconds()) + test_second)
            var month = this.parsetime(parseInt(outtime.getMonth())+1)
            var date = this.parsetime(parseInt(outtime.getDate()))
            var hour = this.parsetime(parseInt(outtime.getHours()))
            var minute = this.parsetime(parseInt(outtime.getMinutes()))
            var second = this.parsetime(parseInt(outtime.getSeconds()))
        }
    }else{
        outtime = new Date()
        outtime.setFullYear(parseInt(outtime.getFullYear()) + test_year)
        outtime.setMonth(parseInt(outtime.getMonth()) + test_month)
        outtime.setDate(parseInt(outtime.getDate()) + test_day)
        outtime.setHours(parseInt(outtime.getHours()) + test_hour)
        outtime.setMinutes(parseInt(outtime.getMinutes()) + test_minute)
        outtime.setSeconds(parseInt(outtime.getSeconds()) + test_second)
        var month = this.parsetime(parseInt(outtime.getMonth())+1)
        var date = this.parsetime(parseInt(outtime.getDate()))
        var hour = this.parsetime(parseInt(outtime.getHours()))
        var minute = this.parsetime(parseInt(outtime.getMinutes()))
        var second = this.parsetime(parseInt(outtime.getSeconds()))
    }
    var year = outtime.getFullYear()
    var ret = year+'-'+month+'-'+date+' '+hour+':'+minute+':'+second
    return ret
}
/*
 @desc：求出当年/月/日的时间
 @param time 传入时间，格式为：2018|2018-01|2018-01-01
 @return ret stime:开始时间缀，etime:结束时间缀
 */
this.timeswitch = function(time){
    if(/^\d{4}$/.test(time)){  // 年
        var stime = this.strtotime(time)
        var etime = this.strtotime(this.dateadd('+1year',time))
    }else if(/^\d{4}-{1}\d{1,2}$/.test(time)){  // 月
        var stime = this.strtotime(time)
        var etime = this.strtotime(this.dateadd('+1month',time))
    }else if(/^\d{4}-{1}\d{1,2}-{1}\d{1,2}$/.test(time)){  // 日
        var stime = this.strtotime(time)
        var etime = this.strtotime(this.dateadd('+1day',time))
    }else{  // 格式错误
        return false;
    }
    var ret = {
        stime:stime,
        etime:etime
    }
    return ret
}
/*
 @desc：时间友好显示函数
 @param stamp 时间缀，10位
 @return ret 转换后的时间显示
 */
this.timefriend = function(stamp){
    if(!stamp){
        return '—';
    }
    var date = new Date(stamp*1000)
    var time = Math.round(new Date().getTime()/1000)
    diff = time - stamp
    if(diff<0){
        return '—';
    }else if(diff<60){
        return diff+'秒前'
    }else if(diff<3600){
        return Math.floor(diff/60)+'分钟前'
    }else if(diff<86400){
        return Math.floor(diff/3600)+'小时前'
    }else if(diff<259200){
        return Math.floor(diff/86400)+'天前'
    }else{
        var year = this.parsetime(date.getFullYear())
        var month = this.parsetime(date.getMonth()+1)
        var day = this.parsetime(date.getDate())
        var hour = this.parsetime(date.getHours())
        var minute = this.parsetime(date.getMinutes())
        var second = this.parsetime(date.getSeconds())
        var ret = year+'-'+month+'-'+day+' '+hour+':'+minute+':'+second
        return ret
    }
}
}

var datetime = new datetime()
var ret1 = datetime.timetostr(1528593779)
var ret2 = datetime.strtotime('2018')
var ret3 = datetime.timediff('2017','2018-06')
var ret4 = datetime.dateadd('-1year','2018')
var ret5 = datetime.timeswitch('2018-06')
var ret6 = datetime.timefriend(1528593779)
console.log(ret1)
console.log(ret2)
console.log(ret3)
console.log(ret4)
console.log(ret5)
console.log(ret6)

2018-06-10 09:22:59
1514736000
44582400
2017-01-01 00:00:00
{ stime: '1527782400', etime: '1530374400' }
1天前