required-field-check.yml

name: Required Field Check

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  required-field-check:
    runs-on: ubuntu-20.04

    timeout-minutes: 5

    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Use Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}
          registry-url: 'https://registry.npmjs.org'
          cache: yarn

      - name: Install Dependencies
        run: yarn install --frozen-lockfile

      - name: Get files changed in the PR
        id: get_files
        uses: actions/github-script@v7
        with:
          script: |
            const response = await github.request('GET /repos/{owner}/{repo}/pulls/{pull_number}/files', {
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number
            })
            const files = response.data.map(file => file.filename)
            core.setOutput('files', files.join(' '))
            if (files.length === 0) {
              core.setOutput('no_files_changed', true)
            }

      - name: Find required fields on current branch
        id: required-fields-curr-branch
        if: steps.get_files.outputs.no_files_changed != 'true'
        run: |
          REQUIRED_FIELDS_CURR_BRANCH=$(./bin/run list-required-fields -p ${{ steps.get_files.outputs.files }} | jq -c .)
          echo "REQUIRED_FIELDS_CURR_BRANCH=$REQUIRED_FIELDS_CURR_BRANCH" >> $GITHUB_ENV

      - name: Check for required fields on main branch
        id: required-fields-main-branch
        if: steps.get_files.outputs.no_files_changed != 'true'
        run: |
          git checkout main
          REQUIRED_FIELDS_MAIN_BRANCH=$(./bin/run list-required-fields -p ${{ steps.get_files.outputs.files }} | jq -c .)
          echo "REQUIRED_FIELDS_MAIN_BRANCH=$REQUIRED_FIELDS_MAIN_BRANCH" >> $GITHUB_ENV

      - name: Add comment on PR if there is diff in required fields
        if: steps.get_files.outputs.no_files_changed != 'true'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs')
            const path = require('path')

            const fieldsAdded = []
            if(process.env.REQUIRED_FIELDS_CURR_BRANCH && process.env.REQUIRED_FIELDS_MAIN_BRANCH) {
              const requiredFieldsOnBranch = JSON.parse(process.env.REQUIRED_FIELDS_CURR_BRANCH)
              const requiredFieldsOnMain = JSON.parse(process.env.REQUIRED_FIELDS_MAIN_BRANCH)

              Object.keys(requiredFieldsOnBranch).forEach(key => {
                // Check if key is present in requiredFieldsOnMain
                if(requiredFieldsOnMain[key]) {
                  const getActionKeys = Object.keys(requiredFieldsOnBranch[key])
                  for(const actionKey of getActionKeys) {
                    const branchRequiredFields = requiredFieldsOnBranch[key][actionKey]
                    const mainRequiredFields = requiredFieldsOnMain[key][actionKey]
                    const diff = branchRequiredFields.filter(field => !mainRequiredFields?.includes(field))
                    if(diff.length > 0) {
                      const actionOrSettings = actionKey === 'settings' ? '**Setting**' : `**${actionOrSettings}**:${actionKey},`
                      fieldsAdded.push(`- **Destination**: ${key}, ${actionOrSettings} **Field(s)**:${diff.join(',')}`)
                    }
                  }
                } else {
                  
                  // If key is not present in requiredFieldsOnMain, then all fields are added recently
                  const getActionKeys = Object.keys(requiredFieldsOnBranch[key])
                  for(const actionKey of getActionKeys) {
                    const branchRequiredFields = requiredFieldsOnBranch[key][actionKey]
                    const actionOrSettings = actionKey === 'settings' ? 'Settings' : 'Action'
                    fieldsAdded.push(`- **Destination**: ${key}, **${actionOrSettings}**:${actionKey}, **Fields**:${branchRequiredFields.join(',')}`)
                  }
                }
              })
            }

            // Get the comments of the current PR
            const comments = await github.rest.issues.listComments({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo
            })
            const diffComment = comments.data.find(comment => comment.body.includes('<!--REQUIRED_FIELD_DIFF-->')) 

            const comment = fs.readFileSync("./.github/REQUIRED_FIELD_WARNING_TEMPLATE.md", "utf8")
            const commentBody = comment.replace('{{FIELDS_ADDED}}', fieldsAdded.join('\n'))

            if (fieldsAdded.length > 0) {
              // Check if the comment is already added

              if (!diffComment) {
                await github.rest.issues.createComment({
                  issue_number: context.issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  body: commentBody
                  })
              } else {
                await github.rest.issues.updateComment({
                  comment_id: diffComment.id,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  body: commentBody
                })
              }
            } else {
              if (diffComment) {
                await github.rest.issues.deleteComment({
                  comment_id: diffComment.id,
                  owner: context.repo.owner,
                  repo: context.repo.repo
                })
              }
            }