preview.yml

name: Preview deployment

on:
  pull_request:
    types:
      - opened
      - reopened
      - synchronize
      - closed
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}/preview

jobs:
  build:
    if: github.event.action != 'closed'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    outputs:
      image: ${{ steps.meta.outputs.tags }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=sha,format=short,prefix=pr-${{ github.event.pull_request.number }}-

      - name: Build and push container image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./container/Containerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  deploy-preview:
    if: github.event_name == 'pull_request' && github.event.action != 'closed'
    runs-on: ubuntu-latest
    permissions:
      deployments: write
      pull-requests: write
    needs: build
    environment:
      name: pr${{ github.event.pull_request.number }}
      url: ${{ steps.deploy.outputs.url }}
    steps:
      - name: Deploy to ZAD
        id: deploy
        uses: RijksICTGilde/zad-actions/deploy@v2
        with:
          api-key: ${{ secrets.ZAD_API_KEY }}
          project-id: pm-5sj
          deployment-name: pr${{ github.event.pull_request.number }}
          component: proef
          image: ${{ needs.build.outputs.image }}
          comment-on-pr: true
          qr-code: true
          wait-for-ready: true
          github-token: ${{ secrets.GITHUB_TOKEN }}

  cleanup-preview:
    if: github.event_name == 'pull_request' && github.event.action == 'closed'
    runs-on: ubuntu-latest
    permissions:
      deployments: write
      packages: write
      pull-requests: write
    steps:
      - name: Cleanup ZAD deployment
        uses: RijksICTGilde/zad-actions/cleanup@v2
        with:
          api-key: ${{ secrets.ZAD_API_KEY }}
          project-id: pm-5sj
          deployment-name: pr${{ github.event.pull_request.number }}
          delete-github-env: true
          delete-github-deployments: true
          delete-pr-comment: true
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Delete container images for this PR
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}
          CONTAINER_ORG: ${{ github.repository_owner }}
          TAG_PREFIX: pr-${{ github.event.pull_request.number }}-
          CONTAINER_NAME: ${{ github.event.repository.name }}/preview
        run: |
          echo "Deleting container images with tag prefix: $TAG_PREFIX"

          ENCODED_NAME=$(printf '%s' "$CONTAINER_NAME" | jq -sRr @uri)

          VERSIONS=$(gh api "orgs/$CONTAINER_ORG/packages/container/$ENCODED_NAME/versions" 2>/dev/null | \
            jq -r --arg prefix "$TAG_PREFIX" '.[] | select(.metadata.container.tags[]? | startswith($prefix)) | .id')

          if [ -z "$VERSIONS" ]; then
            echo "No versions found with tag prefix: $TAG_PREFIX (may already be deleted)"
            exit 0
          fi

          DELETED_COUNT=0
          for VERSION_ID in $VERSIONS; do
            if gh api "orgs/$CONTAINER_ORG/packages/container/$ENCODED_NAME/versions/$VERSION_ID" -X DELETE 2>/dev/null; then
              echo "Deleted version: $VERSION_ID"
              DELETED_COUNT=$((DELETED_COUNT + 1))
            else
              echo "Failed to delete version: $VERSION_ID"
            fi
          done

          echo "Deleted $DELETED_COUNT container version(s)"