dailyCronTask.js

const IncomingWebhook = require('@slack/client').IncomingWebhook
const slackWebhook = require('./slackWebhook')
const GitHub = require('github-api')
const Repository = GitHub.Repository
const fs = require('fs')
const CronJob = require('cron').CronJob
require('dotenv').config()

const GitHubAccessToken = process.env.GITHUB_ACCESS_TOKEN
const url = process.env.SLACK_WEBHOOK_URL
const slack = new slackWebhook(url)

new CronJob('00 59 23 * * *', () => {
  const organization = 'BoostIO'
  const repository = 'Boostnote'
  const gh = new GitHub({ token: GitHubAccessToken })
  const repo = gh.getRepo(organization, repository)

  const filename = 'star-count.txt'
  const yesterday = fs.readFileSync(filename)

  repo.getDetails().then(res => {
    const starCount = res.data.stargazers_count
    const difference = parseInt(starCount) - parseInt(yesterday)
    const message = `@here: It's time to notice the star counts!\nTotal: ${starCount}\nToday: ${difference}`
    slack.sendMessage(message)
    fs.writeFile(filename, starCount)
  })
}, null, true, 'Japan')