index.js

#!/usr/bin/env node
let readline = require('readline');
let smarttv = require('./cast.js');
const fs = require('fs');
const path = require('path');
const util = require('util');
const os = require('os');

const CONFIG = ".vizio.json";
let argv = require('yargs')
  .version('v1.0.2')
  .usage("$0 [args]")
  .option("save",{
    type: 'boolean',
    desc: 'Save IP/Token to ~/'+CONFIG
  }).option("input",{
    type: 'string',
    desc: 'Set the input. Leave blank for a list of inputs'
  }).option("volumeUp", {
    type:'count',
    desc: "Amount to increase the volume"
  }).option("volumeDown", {
    type:'count',
    desc: "Amount to decrease the volume"
  }).option('volume',{
    type: 'number',
    desc:'Set the TV volume'
  }).argv;
async function get_user_input(userprompt){
  return new Promise(resolve => {
    const i = readline.createInterface(process.stdin, process.stdout, null);
    i.question(userprompt, output=>{
      i.close();
      resolve(output);
    });
  });
}
async function list(viz){
  const list = await viz.input_list();
  console.log("Inputs:");
  for(let i = 0; i < list.length; i++){
    if(list[i].current){
      console.log(`  ${list[i].name} (Current)`);
    } else {
      console.log(`  ${list[i].name}`);
    }
  }
}
function device_print(device){
  console.log(`  TV: ${device.name}`);
  console.log(`      ${device.manufacturer} ${device.model}`);
  console.log(`  IP: ${device.ip}`);
}
async function main(){
  const readFile = util.promisify(fs.readFile);
  let config = await readFile(path.resolve(os.homedir(),CONFIG))
    .catch(()=>{return null;})
    .then((data)=>{return JSON.parse(data);});
  let ip, token, viz;
  if(argv.ip !== undefined){
    ip = argv.ip;
  } else if(process.env.SMARTCAST_IP !== undefined){
    ip = process.env.SMARTCAST_IP;
  } else if(config != null && config.ip !== undefined) {
    ip = config.ip;
  } else {
    //ip = await get_user_input('IP: ');
    const devices = await smarttv.discover(true);
    if(devices.length == 0){
      console.log("Error: No VIZIO tvs found");
      return;
    } else if (devices.length == 1){
      const device = devices[0];
      ip = device.ip;
      device_print(device);
    } else {
      for(let i = 0; i < devices.length; i++){
        console.log(`${i}:`);
        device_print(devices[i]);
      }
      const answer = await get_user_input("Enter device number: ");
      ip = devices[parseInt(answer)].ip;
    }
  }
  if(argv.ip !== undefined){
    token = argv.token;
  } else if(process.env.SMARTCAST_IP !== undefined){
    token = process.env.SMARTCAST_TOKEN;
  } else if (config != null && config.token !== undefined){
    token = config.token;
  }
  if(token === undefined){
    viz = new smarttv(ip);
    token = await viz.pair(get_user_input("PIN: "));
  } else {
    viz = new smarttv(ip, token);
  }
  if(argv.save == true){
    await util.promisify(fs.writeFile)(path.resolve(os.homedir(), CONFIG),
      JSON.stringify({ip:ip,token:token}));
  }

  if(argv.input !== undefined){
    if(argv.input === ''){
      await list(viz);
    } else {
      try {
        await viz.input_set(argv.input);
      } catch(e){
        console.log(e);
      }
    }
  }
  if(argv.volumeUp !== undefined){
    if(argv.volumeUp === true){
      await viz.volume_up(1);
    } else {
      await viz.volume_up(parseInt(argv.volumeUp));
    }
  }
  if(argv.volumeDown !== undefined){
    if(argv.volumeDown === true){
      await viz.volume_down(1);
    } else {
      await viz.volume_down(parseInt(argv.volumeDown));
    }
  }
  if(argv.volume !== undefined && argv.volume !== true){
    await viz.volume_set(parseInt(argv.volume));
  }
}
main();