cocos-nodejs-io-game/apps/client/assets/Scripts/Global/NetworkManager.ts

import Singleton from '../Base/Singleton'
import { ApiMsgEnum, IModel, strdecode, strencode } from '../Common';
import { binaryEncode, binaryDecode } from '../Common/Binary';

const TIMEOUT = 5000

export interface ICallApiRet<T> {
  success: boolean;
  error?: Error;
  res?: T
}

type aaa = keyof IModel
export default class NetworkManager extends Singleton {
  static get Instance() {
    return super.GetInstance<NetworkManager>()
  }

  ws: WebSocket
  port = 8888
  maps: Map<ApiMsgEnum, Function[]> = new Map()
  isConnected = false

  connect() {
    return new Promise((resolve, reject) => {
      if (this.isConnected) {
        resolve(true)
        return
      }
      this.ws = new WebSocket(`ws://localhost:${this.port}`)

      this.ws.binaryType = 'arraybuffer';
      this.ws.onopen = () => {
        console.log("ws onopen")
        this.isConnected = true
        resolve(true)
      }

      this.ws.onerror = () => {
        this.isConnected = false
        reject("ws onerror")
      }

      this.ws.onclose = () => {
        this.isConnected = false
        reject("ws onclose")
      }

      this.ws.onmessage = (e) => {
        try {
          const json = binaryDecode(e.data)
          const { name, data } = json
          try {
            if (this.maps.has(name) && this.maps.get(name).length) {
              console.log(json);
              this.maps.get(name).forEach(cb => cb(data))
            }
          } catch (error) {
            console.log("this.maps.get(name).forEach(cb => cb(restData))", error)
          }

        } catch (error) {
          console.log('解析失败，不是合法的JSON格式', error)
        }
      }
    })
  }

  callApi<T extends keyof IModel['api']>(name: T, data: IModel['api'][T]['req']): Promise<ICallApiRet<IModel['api'][T]['res']>> {
    return new Promise((resolve) => {
      try {
        // 超时处理
        const timer = setTimeout(() => {
          resolve({ success: false, error: new Error('timeout') })
          this.unlistenMsg(name, cb)
        }, TIMEOUT)

        // 回调处理
        const cb = (res) => {
          resolve(res)
          clearTimeout(timer)
          this.unlistenMsg(name, cb)
        }
        this.listenMsg(name as any, cb)

        this.sendMsg(name as any, data)
      } catch (error) {
        console.log(error)
        resolve({ success: false, error: error as Error })
      }
    })
  }

  async sendMsg<T extends keyof IModel['msg']>(name: T, data: IModel['msg'][T]) {
    const view = binaryEncode(name, data)
    let networkLag = parseInt(new URLSearchParams(location.search).get('lag') || '0') || 0;
    await new Promise((r) => setTimeout(r, networkLag))
    this.ws.send(view.buffer)
  }

  listenMsg<T extends keyof IModel['msg']>(name: T, cb: (args: IModel['msg'][T]) => void) {
    if (this.maps.has(name)) {
      this.maps.get(name).push(cb)
    } else {
      this.maps.set(name, [cb])
    }
  }

  unlistenMsg(name: ApiMsgEnum, cb: Function) {
    if (this.maps.has(name)) {
      const index = this.maps.get(name).indexOf(cb)
      index > -1 && this.maps.get(name).splice(index, 1)
    }
  }
}