/**
 * 日期工具类
 */
export default class DateTools {
  static instance = new DateTools()

  constructor() {
    if (DateTools.instance) {
      return DateTools.instance
    }
    DateTools.instance = this
  }

  static getInstance() {
    if (!DateTools.instance) {
      DateTools.instance = new DateTools()
    }
    return DateTools.instance
  }

  /**
   * 获取当前时间
   * @returns {string} yyyy-MM-dd HH:mm:ss
   */
  getNow2() {
    const now = new Date()
    const year = now.getFullYear()
    const month = String(now.getMonth() + 1).padStart(2, '0') // 月份从 0 开始，所以要 +1
    const day = String(now.getDate()).padStart(2, '0')
    const hours = String(now.getHours()).padStart(2, '0')
    const minutes = String(now.getMinutes()).padStart(2, '0')
    const seconds = String(now.getSeconds()).padStart(2, '0')
    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`
  }
}