greengit-lambda

greengit-lambda.js

const GitHubApi = require('github')
const github = new GitHubApi({
    version: '3.0.0',
    debug: false,
    protocol: 'https',
    host: 'api.github.com',
    pathPrefix: '',
    timeout: 5000,
    headers: {
        'user-agent': 'GitHub Commits Abuser' // GitHub is happy with a unique user agent
    }
})

github.authenticate({
    type: 'token',
    token: 'YOUR GITHUB AUTH TOKEN'
})

const commitIntoStreak = shaKey => {
    var rand = Math.floor(Math.random() * 1488)
    const content = new Buffer(`${rand} days of endless commiting and counting..`).toString('base64')
    return github.repos.updateFile({
        owner: 'fletcherist',
        repo: 'greengit-repo',
        path: 'streak.md',
        message: 'streak update',
        sha: shaKey,
        content: content
    })
}

const ONE_DAY = 432e5
const ONE_HOUR = 36e5

// global variable to save 
let LAST_COMMITED_TIME = Date.now()

const IS_READY_TIMEOUT = ONE_DAY
const isReadyComparator = initialTime => Date.now() - initialTime > IS_READY_TIMEOUT

const getReadyTime = () => IS_READY_TIMEOUT - (Date.now() - LAST_COMMITED_TIME)
const convertReadyTimeIntoHours = readyTime => (readyTime / ONE_HOUR).toPrecision(4)

const isReadyForCommiting = ((initialTime = Date.now()) => {
  return () => {
    const isReady = isReadyComparator(initialTime)
    isReady ? initialTime = Date.now() : null
    LAST_COMMITED_TIME = initialTime
    return isReady
  }
})()

const getGithubSha = () => new Promise(resolve => {
  github.repos.getContent({
    owner: 'fletcherist',
    repo: 'greengit-repo',
    path: 'streak.md'
  }).then(res => resolve(res.data.sha))
})

exports.greengit = (req, res) => {
  if (!isReadyForCommiting()) {
    return res.send(`Not ready for commiting yet.
      Left ${convertReadyTimeIntoHours(getReadyTime())} hours`)
  }

  getGithubSha()
    .then(commitIntoStreak)
    .then(() => {
      console.log('Commited successfully!')
      return res.send('Commited successfully!')
    })
    .catch(error => res.send(error))
}