ykonsole-server/src/drivers/iconsole.js

const Client = require("iconsole-bike-client");
const _ = require("underscore");

class IConsoleDriver {
  constructor(connect) {
    this.connectString = connect;
    this.client = null;
    this.maxLevel = 24;
    this.lastLevel = 18;

    this.workoutState = {};
  }

  async connect() {
    this.client = await Client.scan(this.connectString, 15000)
  
    this.client.events.on("maxLevel", ({maxLevel}) => {
      this.maxLevel = maxLevel;

      this.events.emit("maxLevel", maxLevel);
    });

    this.client.events.on("workoutState", ({workoutState}) => {
      this.workoutState = workoutState;

      if (!_.isEqual(this.workoutState, workoutState)) {
        this.workoutState = {...workoutState};
        this.events.emit("workoutState", {...workoutState});
      }
    });
  }

  async start() {
    await this.client.start({level: this.lastLevel});
  }

  async pause() {
    await this.client.pause();
  }

  async resume() {
    await this.client.resume();
  }

  async stop() {
    await this.client.pause();
  }

  async setLevel(n) {
    if (n < 0 || n > this.maxLevel) {
      return Promise.reject(new Error(`Level is out of range (0 - ${this.maxLevel})`))
    }

    this.lastLevel = n;

    return await this.client.setLevel(n);
  }

  destroy() {
    this.stop();
    this.client.disconnect();
    this.events.emit("destroy");
    this.events.removeAllListeners();
  }
}

module.exports = IConsoleDriver;