name: Report PR Age

on:
    pull_request:
        types:
            - closed

jobs:
    report-pr-age:
        name: Report age of PR
        runs-on: ubuntu-20.04
        if: github.event.pull_request.head.repo.full_name == github.repository && github.event.pull_request.merged == true
        steps:
            - name: Calculate PR age
              run: |
                  pr_age=$((($(date '+%s') - $(date -d "${{ github.event.pull_request.created_at }}" '+%s'))))
                  echo pr_age=$pr_age >> $GITHUB_ENV
                  first_commit_message_in_pr=$(curl -s "${{github.event.pull_request._links.commits.href}}" | jq '.[0].commit.message')
                  echo first_commit_message_in_pr=$first_commit_message_in_pr >> $GITHUB_ENV
                  if [[ $first_commit_message_in_pr =~ Revert[[:space:]] ]]; then
                      echo is_revert=true >> $GITHUB_ENV
                  else
                      echo is_revert=false >> $GITHUB_ENV
                  fi
            - name: Capture PR age to PostHog
              uses: PostHog/posthog-github-action@v0.1
              with:
                  posthog-token: ${{secrets.POSTHOG_API_TOKEN}}
                  event: 'posthog-ci-pr-stats'
                  properties: '{"prAgeInSeconds": ${{ env.pr_age }}, "isRevert": ${{env.is_revert}}, "prTitle": "${{ github.event.pull_request.title}}", "prNumber": "${{ github.event.pull_request.number}}"  }'