/**
 * ELMessage 去重
 */
class FilterMessage {
  constructor(delay=3000) {
    this.messages = new Set()
    this.delay=delay
  }

  /**
   * 添加消息
   * @param {String} message
   */
  add(message){
    const m = this.messages.has(message)
    if (m){
      return
    }

    this.messages.add(message)
    setTimeout(()=>{
      this.messages.delete(message)
    },this.delay)
  }

  has(message){
    return this.messages.has(message)
  }
}

export {FilterMessage}