emis-frontend/src/utils/XDNoticeSdk.js

'use strict'
/*
  XDNoticeSdk
 */
class XDNoticeSdk {

    VERSION="1.0.0"
    MAX_SENT_RETRY_COUNT = 9;
    WS_URL = 'ws://'+process.env.VUE_APP_WS_HOST+'/ws/';

    userId = null;


    AUTH_TOKEN=null;

    WS_INIT = 0;
    WS_OPEN = 1;
    WS_CLOSING = 2;
    WS_CLOSE = 3;

    // 和服务端连接的socket对象
    ws = null;
    // WS 回调函数
    onOpenCallback =[];
    onCloseCallback=[];
    onErrorCallback =[];
    // onMessageCallback =[];

    onMessageCallback=[];

    // 自定义 回调函数
    callbacks ={}

    // 标识:是否连接成功 , 记录重试的次数,重新连接尝试的次数
    connected = false;
    printerIsRead = false;
    sendRetryCount = 0;
    connectRetryCount = 0;

    static instance = null;
    constructor() {
      this.instance = null
    }
    static getInstance() {
      if (!this.instance) {
          this.instance = new XDNoticeSdk()
      }
      return this.instance
    }
    // 外部方法----------------------------------------------------------------
    init(userId){
      // 初始化参数建立连接
      // this.token=getToken();
      this.userId=userId;
      this.connect();
      this.start();
    }

    setOnOpen(callback){
      this.onOpenCallback.push(callback);

      if(this.connected){
        if(callback!=null){
          callback();
        }
      }
    }

    setOnClose(callback){
      this.onCloseCallback.push(callback);

      if(!this.connected){
        if(callback!=null){
          callback();
        }
      }
    }

    setOnError(callback){
      this.onErrorCallback.push(callback);
    }

    setOnMessage(callback){
      this.onMessageCallback.push(callback);
      if(this.connected){
        if(callback!=null){
          callback();
        }
      }

    }

    getRequestId() {
      let requestId = 'req' + new Date().getTime().toString(36) + Math.random().toString(36).substring(2, 9);
      return requestId;
    }

    //--内部方法--------------------------------------------------------------

    // 连接服务器的方法
    connect() {
      // 连接服务器
      if (!window.WebSocket) {
          console.log('您的浏览器不支持WebSocket');
          return null;
      }

      if (!this.ws || this.getWSReadyState() === this.WS_CLOSING || this.getWSReadyState() === this.WS_CLOSE) {
        try {
          this.ws = new WebSocket(this.WS_URL+""+this.userId);

          this.ws.onerror = () => {
              // console.log("ws onerror!");
              if(this.onErrorCallback.length>0){
                this.onErrorCallback.forEach(callback=>{
                  if(callback!=null){
                    callback();
                  }
                })
              }
          }
          this.ws.onopen = () => {
              // console.log("ws onopen!");

              this.connected = true
              this.connectRetryCount = 0

              if(this.onOpenCallback.length>0){
                this.onOpenCallback.forEach(callback=>{
                  if(callback!=null){
                    callback();
                  }
                })
              }

          };

          this.ws.onpong = () => {
            // console.log("ws onpong!");
          }

          this.ws.onclose = () => {
            // console.log("ws onclose!");

            this.connected = false;
            this.connectRetryCount++;

            if(this.connectRetryCount>120){
              this.connectRetryCount=0;
            }

            if(this.onCloseCallback.length>0){
              this.onCloseCallback.forEach(callback=>{
                if(callback!=null){
                  callback();
                }
              })
            }
            // * this.connectRetryCount

            setTimeout(() => {
               this.connect()
            }, 1000 )
          };

          this.ws.onmessage = e => {
            // console.log('ws onmessage:' + e.data)
             if(this.onMessageCallback.length>0){
                this.onMessageCallback.forEach(callback=>{
                  if(callback!=null){
                    callback(e);
                  }
                })
              }
            // if (e.data.charAt(0) === "{") {
            //     var data = this.jsonToObj(e.data);
            //     if(this.onMessageCallback){
            //       this.onMessageCallback(data);
            //     }
            //     // if(msg["CMD"]=='printerIsRead'){
            //     //   printerIsRead=true;
            //     // }
            //     // else{

            //     // }
            // } else {
            //     console.log("数据格式非法:" + e.data);
            // }
          };

        } catch (ex) {
          setTimeout(() => {
            this.connect()
          }, 1000 )

        }
      }

      return this.ws;
    }

    jsonToObj(json){
      return JSON.parse(json)
    }

    objToJson(obj){
      return JSON.stringify(obj)
    }

    /**
     * readyState->0:尚未建立连接;1:已经建立连接;2:正在关闭;3:已经关闭或不可用
     * @param thisWs
     * @returns {*}
    */
    getWSReadyState() {
        if (this.ws.readyState !== undefined) {
            return this.ws.readyState;
        }
        return this.WS_INIT;
    };

    // 发送数据的方法
    send(data) {
        // console.log("send:"+data)
        if (this.getWSReadyState()  === this.WS_OPEN ) {
            this.sendRetryCount = 0
            this.ws.send(data)
            return 1;
        } else {
            console.log("Ws is abnormal,send faild!!")
            return -1
        }
    }

    // 关闭socket连接
    close() {
        if (this.ws) {
            this.ws.close();
            this.connected = false; // 更新连接状态
            clearInterval(this.heartbeatInterval); // 清除心跳检测定时器
        }
    }
    // 开启心跳检测
    start() {
        // this.heartbeatInterval = setInterval(() => {
        //     if (this.getWSReadyState()  === this.WS_OPEN ) {
        //       // this.ws.ping();
        //       this.ws.send(0x9);
        //     }
        // }, 1000);
    }
}


export default XDNoticeSdk;