获取近几年年份 月份 季度 。。

import dayjs from 'dayjs'

//获取近几年的年份
export function handleLastYearList(num = 5, year?: string | number) {
  if (year) year = year.toString()
  const currentYear = year ? new Date(year).getFullYear() : new Date().getFullYear()
  const originYearList = []
  for (let i = 0; i < num; i++) {
    originYearList.push(`${currentYear - i}`)
  }
  return originYearList.reverse()
}

//获取近几月的月份
export function handleLastMonthList(num = 12, separator = '-', month?: string) {
  let data = new Date()
  const result = []
  if (month) {
    data = new Date(month)
  }
  data.setMonth(data.getMonth() + 1, 1)
  for (let i = 0; i < num; i++) {
    data.setMonth(data.getMonth() - 1)
    let m: string | number = data.getMonth() + 1
    m = m < 10 ? '0' + m : m
    result.push(`${data.getFullYear()}${separator}${m}`)
  }
  return result.reverse()
}

//获取近几天的日期
export function handleLastDayList(num = 10, format = 'YYYY-MM-DD') {
  const result = []
  const time = +new Date()
  const oneDayTime = 24 * 60 * 60 * 1000
  for (let i = 0; i < num; i++) {
    const daytime = time - i * oneDayTime
    const formatTime = dayjs(daytime).format(format)
    result.push(formatTime)
  }
  return result.reverse()
}

// 获取前几个季度
function getLast4Quarters(count = 5, date?: string) {
  const quarters = [] // 季度的结果
  const result: string[] = []
  let currentDate = new Date() // 获取当前日期
  if (date) {
    currentDate = new Date(date)
  }
  const currentYear = currentDate.getFullYear() // 获取当前年
  let currentMonth = currentDate.getMonth() // 获取当前月份
  for (let i = 0; i < count; i++) {
    const currentQuarter = Math.floor(currentMonth / 3) + 1 // 计算当前季度
    quarters.push(currentQuarter) // 将当前季度存入数组中
    currentMonth -= 3 // 计算上一个季度的月份
  }
  quarters.forEach((ele) => {
    if (ele > 0) {
      result.push(currentYear + '年第' + ele + '季度')
    } else {
      const year = currentYear - 1 - Math.abs(Math.ceil(ele / 4))
      const num = 4 + (ele % 4)
      result.push(year + '年第' + num + '季度')
    }
  })
  return result.reverse()
}