index.js

const labeler = require('./lib/labeler')
const reviewer = require('./lib/reviewer')
const greetings = require('./lib/greetings')
const issuelink = require('./lib/issuelink')
const titleValidator = require('./lib/title_validator')
const upToDateChecker = require('./lib/up_to_date_checker')
const utils = require('./lib/utils')

module.exports = app => {
  app.log('Yay, the app was loaded!')

  app.on('*', async context => {
    context.log({ event: context.event, action: context.payload.action })
  })

  // "Labeler" - Add Labels on PRs
  app.on([
    'pull_request.opened',
    'pull_request.reopened',
    'pull_request.edited',
    'pull_request.synchronize'], async context => {
    const config = await utils.getConfig(context)
    await labeler.addLabelsOnPr(context, config)
  })

  // "Reviewer" - Assign reviewers on PRs based on label
  app.on([
    'pull_request.labeled',
    'pull_request.unlabeled'], async context => {
      const config = await utils.getConfig(context)
      await reviewer.addReviewersOnPr(context, config)
  })

  // "Greetings" - Welcome Authors on opening their first PR
  app.on('pull_request.opened', async context => {
    const config = await utils.getConfig(context)
    await greetings.commentOnfirstPR(context, config)
  })

  // "Greetings" - Congratulate Authors on getting their first PR merged
  app.on('pull_request.closed', async context => {
    const config = await utils.getConfig(context)
    await greetings.commentOnfirstPRMerge(context, config)
  })

  // "Greetings" - Welcome Authors on opening their first Issue
  app.on('issues.opened', async context => {
    const config = await utils.getConfig(context)
    await greetings.commentOnfirstIssue(context, config)
  })

  // "IssueLink" - Update issue links in PRs
  app.on([
    'pull_request.opened',
    'pull_request.reopened',
    'pull_request.edited',
    'pull_request.synchronize'], async context => {
    const config = await utils.getConfig(context)
    await issuelink.insertIssueLinkInPrDescription(context, config)
  })

  // "Commit Validator" - validate commit messages for regular expression
  app.on([
    'pull_request.opened',
    'pull_request.reopened',
    'pull_request.edited',
    'pull_request.synchronize'], async context => {
    const config = await utils.getConfig(context)
    await titleValidator.verifyTitles(context, config)
  })

  // "Up to date checker" - Check if PR is up to date with master
  app.on([
    'pull_request.opened',
    'pull_request.reopened',
    'pull_request.edited',
    'pull_request.synchronize'], async context => {
    const config = await utils.getConfig(context)
    await upToDateChecker.checkUpToDate(context, config)
  })
}