name: Prefer TypeScript

on:
  pull_request:
    branches:
      - master

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - name: Get changed files
        id: changed
        uses: trilom/file-changes-action@master
        with:
          githubToken: ${{ secrets.GITHUB_TOKEN }}

      - name: Determine if a .js or .jsx file was added
        id: check
        run: |
          js_files_added() {
            jq -r '
              map(
                select((endswith(".js") or endswith(".jsx"))
              ) | join("\n")
            ' ${HOME}/files_added.json
          }
          echo ::set-output name=js_files_added::$(js_files_added)

      - if: steps.check.outputs.js_files_added
        name: Add Comment to PR
        uses: unsplash/comment-on-pr@master
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          msg: |
            ### WARNING: Prefer TypeScript

            Looks like your PR contains new `.js` or `.jsx` files:

            ```
            ${{steps.check.outputs.js_files_added}}
            ```

            As decided in [SIP-36](https://github.com/apache/incubator-superset/issues/9101), all new frontend code should be written in TypeScript. Please convert above files to TypeScript then re-request review.