node-pulseaudio-control/main.js

const nativeCode = require('bindings')('miccontrol.node');
const {promisify} = require("util");
let connectionStarted = false;
let connected = false;
let queuedRequests = [];

let aAddon = [
  "connectToPulse",
  //"getSources"
].reduce((obj, fn) => {
  obj[fn] = promisify(nativeCode[fn]);
  return obj;
}, {});

module.exports = () => {
  console.log("Starting connection");
  if(!connectionStarted) {
    nativeCode.connectToPulse((e) => {
      console.log("CONNECTED!");
      if(e) {
        connectionStarted = false;
      } else {
        connected = true;
      }
      queuedRequests.forEach(f => f(e));
      queuedRequests = [];
    });
    connectionStarted = true;
  }

  const miccontrol =  {
    getSources: () => {
      return new Promise(async (res, rej) => {
        if(!connected) {
          return queuedRequests.push(e => e ? rej(e) : res(miccontrol.getSources()));
        }
        const sources = await aAddon.getSources();

        const sourceControllers = sources.map((source) => {
          let {id, description, isDefault} = source;
          return {
            id,
            description,
            isDefault,
            mute: async () => {
              return aAddon.muteSource(id);
            },
            unmute: async () => {
              return aAddon.unmuteSource(id);
            },
            isMuted: async () => {
              return aAddon.isSourceMuted(id);
            },
            toggleMute: async () => {
              if(await aAddon.isSourceMuted(id)) {
                return aAddon.unmuteSource(id);
              }
              return aAddon.muteSource(id);
            }
          };
        });

        res(sourceControllers)
      });
    }
  };
  
  return miccontrol;
}