[游戏开发]脚本（一）计算同环比时间

该脚本是用于在js中计算各种类型的同环比时间，输入时间格式为 yyyy-MM，输出为各种格式的同环比时间字符串。

//拆解出查询条件中的年、月
var datetime = new Date(selected_month_time)
var year = datetime.getFullYear()
var month = datetime.getMonth() + 1

//当天凌晨时间戳，并拆解出当天年、月、日
var todayDateTime = new Date(new Date().toLocaleDateString())
var todayYear = todayDateTime.getFullYear()
var todayMonth = todayDateTime.getMonth() + 1
var todayDay = todayDateTime.getDate()

//判断查询是否为当月
var isCurrentMonth = false
if( year===todayYear && month===todayMonth){
    isCurrentMonth = true
}

//查询月份的起止时间
var selected_start_date = selected_month_time + '-01 00:00:00'
var selected_stop_date = addMonthOrGetNow(year,month,isCurrentMonth,todayYear,todayMonth,todayDay)
var selected_start_date_day = selected_start_date.substring(0,10)
var selected_stop_date_day = selected_stop_date.substring(0,10)
var selected_start_date_month = selected_start_date.substring(0,7)
var selected_stop_date_month = getStopMonth(isCurrentMonth,selected_stop_date.substring(0,7))
console.log("selected_start_date",selected_start_date);
console.log("selected_stop_date",selected_stop_date);
console.log("selected_start_date_day",selected_start_date_day);
console.log("selected_stop_date_day",selected_stop_date_day);
console.log("selected_start_date_month",selected_start_date_month);
console.log("selected_stop_date_month",selected_stop_date_month);
console.log("bq_month",month);
console.log("bq_last_day",getLastDay(year,month));

//同比查询月份的起止时间
var tb_selected_start_date = tbDateStr(selected_start_date)
var tb_selected_stop_date = tbDateStr(selected_stop_date)
var tb_selected_start_date_day = tb_selected_start_date.substring(0,10)
var tb_selected_stop_date_day = tb_selected_stop_date.substring(0,10)
var tb_selected_start_date_month = tb_selected_start_date.substring(0,7)
var tb_selected_stop_date_month = getStopMonth(isCurrentMonth,tb_selected_stop_date.substring(0,7))
console.log("tb_selected_start_date",tb_selected_start_date);
console.log("tb_selected_stop_date",tb_selected_stop_date);
console.log("tb_selected_start_date_day",tb_selected_start_date_day);
console.log("tb_selected_stop_date_day",tb_selected_stop_date_day);
console.log("tb_selected_start_date_month",tb_selected_start_date_month);
console.log("tb_selected_stop_date_month",tb_selected_stop_date_month);

//环比查询月份的起止时间
var hb_selected_start_date = hbDateStr(selected_start_date)
var hb_selected_stop_date = hbDateStr(selected_stop_date)
var hb_selected_start_date_day = hb_selected_start_date.substring(0,10)
var hb_selected_stop_date_day = hb_selected_stop_date.substring(0,10)
var hb_selected_start_date_month = hb_selected_start_date.substring(0,7)
var hb_selected_stop_date_month = getStopMonth(isCurrentMonth,hb_selected_stop_date.substring(0,7))
console.log("hb_selected_start_date",hb_selected_start_date);
console.log("hb_selected_stop_date",hb_selected_stop_date);
console.log("hb_selected_start_date_day",hb_selected_start_date_day);
console.log("hb_selected_stop_date_day",hb_selected_stop_date_day);
console.log("hb_selected_start_date_month",hb_selected_start_date_month);
console.log("hb_selected_stop_date_month",hb_selected_stop_date_month);

//计算近一年的本期、同期、环期的起止时间（只到天）
var select_start_data_recent_oneyear = tb_selected_start_date.substring(0,10)
var select_stop_data_recent_oneyear = selected_start_date.substring(0,10)
console.log('select_start_data_recent_oneyear',select_start_data_recent_oneyear)
console.log('select_stop_data_recent_oneyear',select_stop_data_recent_oneyear)

var tb_select_start_data_recent_oneyear = tbDateStr(tb_selected_start_date).substring(0,10)
var tb_select_stop_data_recent_oneyear = select_start_data_recent_oneyear
console.log('tb_select_start_data_recent_oneyear',tb_select_start_data_recent_oneyear)
console.log('tb_select_stop_data_recent_oneyear',tb_select_stop_data_recent_oneyear)

var hb_select_start_data_recent_oneyear = tbDateStr(hbDateStr(selected_start_date)).substring(0,10)
var hb_select_stop_data_recent_oneyear = hbDateStr(selected_start_date).substring(0,10)
console.log('hb_select_start_data_recent_oneyear',hb_select_start_data_recent_oneyear)
console.log('hb_select_stop_data_recent_oneyear',hb_select_stop_data_recent_oneyear)


function addMonthOrGetNow(year, month,isCurrentMonth,todayYear,todayMonth,todayDay) {
    if(isCurrentMonth){
        if(todayMonth<10){
            todayMonth = '0' + todayMonth
        }
        if(todayDay<10){
            todayDay = '0' + todayDay
        }
        return '' + todayYear + '-' + todayMonth + '-' + todayDay + ' 00:00:00'
    }else{
        if(month===12){
            year = year + 1
            month = 1
        }else{
            month = month + 1
        }
        if(month<10){
            month = '0' + month
        }
        return '' + year + '-' + month + '-01 00:00:00'
    }
    

}

function tbDateStr(selected_date){
    var datetime = new Date(selected_date)
    var year = datetime.getFullYear()
    year = year - 1
    return '' + year + selected_date.substring(4)
}

function hbDateStr(selected_date){
    var datetime = new Date(selected_date)
    var year = datetime.getFullYear()
    var month = datetime.getMonth() + 1

    if(month===1){
        year = year - 1
        month = 12
    }else{
        month = month - 1
    }
    if(month<10){
        month = '0' + month
    }
    
    return '' + year + '-' + month + selected_date.substring(7)
}


function getStopMonth(isCurrentMonth,stop_date_month) {
    var year = parseInt(stop_date_month.substring(0,4))
    var month = parseInt(stop_date_month.substring(5,7))
    if(isCurrentMonth){
        if(month==12){
            month = 1
            year = year + 1
        }else{
            month = month + 1
        }

        if(month<10){
            return '' + year + '-0' + month 
        }else{
            return '' + year + '-' + month 
        }
    }else{
        return stop_date_month
    }
}

function getLastDay(year,month){
    var lastDateTime = new Date(year,month,0)
    var bq_last_day = lastDateTime.getDate()
    if(bq_last_day<10){
        return '0' + bq_last_day
    }else{
        return '' + bq_last_day
    }
}