// 时间工具：提供简单的日期时间格式化

export function pad2(num: number): string {
  return num < 10 ? `0${num}` : `${num}`
}

/**
 * 按照简单占位符格式化当前时间
 * 支持占位：YYYY MM DD HH mm ss
 * @param format 默认 'YYYY-MM-DD HH:mm:ss'
 */
export function formatNow(format: string = 'YYYY-MM-DD HH:mm:ss'): string {
  const d = new Date()
  const map: Record<string, string> = {
    YYYY: `${d.getFullYear()}`,
    MM: pad2(d.getMonth() + 1),
    DD: pad2(d.getDate()),
    HH: pad2(d.getHours()),
    mm: pad2(d.getMinutes()),
    ss: pad2(d.getSeconds()),
  }
  let out = format
  Object.keys(map).forEach((k) => {
    out = out.replace(new RegExp(k, 'g'), map[k])
  })
  return out
}