name: Signed commits

on:
  pull_request_target:
    types:
      - opened
      - reopened
      - synchronize
      - ready_for_review

permissions:
  pull-requests: write

jobs:
  signed-commits:
    if: github.repository_owner == 'shadcn-ui'
    runs-on: ubuntu-latest
    name: Signed commits
    steps:
      - name: Check PR commits
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const body = "Can you sign the commits please? See https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits. Thank you."

            const { owner, repo } = context.repo
            const pullNumber = context.payload.pull_request.number

            const commits = await github.paginate(github.rest.pulls.listCommits, {
              owner,
              repo,
              pull_number: pullNumber,
              per_page: 100,
            })

            const unsignedCommits = commits.filter((commit) => {
              return commit.commit.verification?.reason === "unsigned"
            })

            const comments = await github.paginate(github.rest.issues.listComments, {
              owner,
              repo,
              issue_number: pullNumber,
              per_page: 100,
            })

            const existingComments = comments.filter((comment) => {
              return comment.user.type === "Bot" && comment.body.trim() === body
            })

            if (unsignedCommits.length > 0) {
              core.info(`Found ${unsignedCommits.length} unsigned commits.`)

              if (existingComments.length === 0) {
                await github.rest.issues.createComment({
                  owner,
                  repo,
                  issue_number: pullNumber,
                  body,
                })
              }

              return
            }

            core.info("All commits are signed.")

            for (const comment of existingComments) {
              await github.rest.issues.deleteComment({
                owner,
                repo,
                comment_id: comment.id,
              })
            }