neat-log-debug.js

var neat = require('neat-log')
var output = require('neat-log/output')
var progress = require('progress-string')
var crypto = require('crypto')

var hypercore = require('hypercore')
var hyperdiscovery = require('hyperdiscovery')

var feed = hypercore('data', process.argv[2], {valueEncoding: 'json'})

function debug (state) {
  if (feed.writable) feed.append({time: Date.now(), state: state})
}

var log = neat(function (state) {
  debug(state)
  return output`
    Mining BitCoin ... (${state.hash})

    [${progress(state)(state.progress)}]

    Coins mined: ${state.mined}
  `
})

feed.on('ready', function () {
  console.log('feed is ' + feed.key.toString('hex'))
  hyperdiscovery(feed, {live: true})

  log.use(function (state, bus) {
    state.progress = 0
    state.mined = 0

    if (!feed.writable) {
      feed.createReadStream({live: true, tail: true}).on('data', function (data) {
        var keys = Object.keys(data.state)
        keys.forEach(function (k) {
          state[k] = data.state[k]
        })
        bus.render()
      })
      return
    }

    setInterval(function () {
      state.width = 50
      state.total = 200
      state.progress++
      if (state.progress > 200) {
        state.progress = 0
        state.mined++
      }
      state.hash = crypto.randomBytes(16).toString('hex')
      bus.render()
    }, 250)
  })
})

package.json

{
  "name": "neat-log-debug",
  "version": "1.0.0",
  "description": "",
  "main": "test.js",
  "dependencies": {
    "hypercore": "^6.6.6",
    "hyperdiscovery": "^6.0.4",
    "neat-log": "^1.1.0",
    "progress-string": "^1.2.1"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}