name: Update issues on release
on:
  release:
    types: [published]

jobs:
  update_issues:
    runs-on: ubuntu-latest
    steps:
      - name: Get milestone for release
        id: milestone
        uses: actions/github-script@0.9.0
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const options = github.issues.listMilestonesForRepo.endpoint.merge({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'all'
            })

            const milestones = await github.paginate(options)

            return milestones.find( milestone => milestone.title == "${{github.event.release.name}}" ).number
      - name: Get issues for milestone
        id: issues
        uses: actions/github-script@0.9.0
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const options = github.issues.listForRepo.endpoint.merge({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'all',
              milestone: ${{steps.milestone.outputs.result}}
            })

            const issues = await github.paginate(options)

            // Pull requests are issues so filter them out
            return issues.filter( issue => !issue["pull_request"] )
      - name: Comment and close issues
        uses: actions/github-script@0.9.0
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            for (let issue of ${{ steps.issues.outputs.result }}) {
              // This can be parallelized better by moving the await but it might trip rate limits
              await github.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue.number,
                body: ':robot: This issue has been addressed in the latest release.  See full details in the [Release Notes]( ${{ github.event.release.html_url }}).'
              })

              await github.issues.update({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue.number,
                state: 'closed'
              })
            }