name: Build docker image

on:
  pull_request:
    branches:
      - "main"
    paths:
      - api/Dockerfile
      - web/Dockerfile

permissions:
  contents: read

concurrency:
  group: docker-build-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  check-changes:
    runs-on: ubuntu-latest
    outputs:
      api: ${{ steps.changes.outputs.api }}
      web: ${{ steps.changes.outputs.web }}
    steps:
      - name: Checkout code
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 2
          persist-credentials: false

      - name: Check changed files
        id: changes
        uses: dorny/paths-filter@fbd0ab8f3e69293af611ebaee6363fc25e6d187d # v4.0.1
        with:
          filters: |
            api:
              - 'api/Dockerfile'
            web:
              - 'web/Dockerfile'

  build-api:
    name: Build API Docker Image
    needs: check-changes
    if: needs.check-changes.outputs.api == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Build Docker Image
        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7.0.0
        with:
          push: false
          context: "{{defaultContext}}:api"
          file: Dockerfile
          platforms: linux/amd64
          cache-from: type=gha,scope=api-pr
          cache-to: type=gha,mode=max,scope=api-pr

  build-web:
    name: Build Web Docker Image
    needs: check-changes
    if: needs.check-changes.outputs.web == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0

      - name: Build Docker Image
        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7.0.0
        with:
          push: false
          context: "{{defaultContext}}:web"
          file: Dockerfile
          platforms: linux/amd64
          cache-from: type=gha,scope=web-pr
          cache-to: type=gha,mode=max,scope=web-pr