name: ocelot.social backend test CI


on: [push]

jobs:
  files-changed:
    name: Detect File Changes - Backend
    runs-on: ubuntu-latest
    outputs:
      backend: ${{ steps.changes.outputs.backend }}
      docker: ${{ steps.changes.outputs.docker }}
    steps:
      - uses: actions/checkout@v3.3.0

      - name: Check for backend file changes
        uses: dorny/paths-filter@v2.11.1
        id: changes
        with:
          token: ${{ github.token }}
          filters: .github/file-filters.yml
          list-files: shell

  build_test_neo4j:
    name: Docker Build Test - Neo4J
    if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true'
    needs: files-changed
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Neo4J | Build 'community' image
        run: |
          docker build --target community -t "ocelotsocialnetwork/neo4j-community:test" neo4j/
          docker save "ocelotsocialnetwork/neo4j-community:test" > /tmp/neo4j.tar
      
      - name: Cache docker images
        id: cache-neo4j
        uses: actions/cache/save@v3.3.1
        with:
          path: /tmp/neo4j.tar
          key: backend-neo4j-cache-${{ GITHUB_RUN_NUMBER }}

  build_test_backend:
    name: Docker Build Test - Backend
    if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true'
    needs: files-changed
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: backend | Build 'test' image
        run: |
          docker build --target test -t "ocelotsocialnetwork/backend:test" backend/
          docker save "ocelotsocialnetwork/backend:test" > /tmp/backend.tar
      
      - name: Cache docker images
        id: cache-backend
        uses: actions/cache/save@v3.3.1
        with:
          path: /tmp/backend.tar
          key: backend-cache-${{ GITHUB_RUN_NUMBER }}

  lint_backend:
    name: Lint Backend
    if: needs.files-changed.outputs.backend == 'true'
    needs: files-changed
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: backend | Lint
        run: cd backend && yarn && yarn run lint

  unit_test_backend:
    name: Unit tests - Backend
    if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true'
    needs: [files-changed, build_test_neo4j, build_test_backend]
    runs-on: ubuntu-latest
    permissions: 
      checks: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Restore Neo4J cache
        uses: actions/cache/restore@v3.3.1
        with:
          path: /tmp/neo4j.tar
          key: backend-neo4j-cache-${{ GITHUB_RUN_NUMBER }}
          fail-on-cache-miss: true

      - name: Restore Backend cache
        uses: actions/cache/restore@v3.3.1
        with:
          path: /tmp/backend.tar
          key: backend-cache-${{ GITHUB_RUN_NUMBER }}
          fail-on-cache-miss: true

      - name: Load Docker Images
        run: |
          docker load < /tmp/neo4j.tar
          docker load < /tmp/backend.tar

      - name: backend | copy env files
        run: |
          cp webapp/.env.template webapp/.env
          cp backend/.env.template backend/.env

      - name: backend | docker-compose
        run: docker-compose -f docker-compose.yml -f docker-compose.test.yml up --detach --no-deps neo4j backend

      - name: backend | Initialize Database
        run: docker-compose exec -T backend yarn db:migrate init

      - name: backend | Migrate Database Up
        run: docker-compose exec -T backend yarn db:migrate up

      - name: backend | Unit test incl. coverage check
        run: docker-compose exec -T backend yarn test

  cleanup:
    name: Cleanup
    if: always()
    needs: [files-changed, unit_test_backend]
    runs-on: ubuntu-latest
    continue-on-error: true
    steps:
      - name: Delete cache
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh extension install actions/gh-actions-cache
          KEY="backend-neo4j-cache-${{ GITHUB_RUN_NUMBER }}"
          gh actions-cache delete $KEY -R Ocelot-Social-Community/Ocelot-Social --confirm
          KEY="backend-cache-${{ GITHUB_RUN_NUMBER }}"
          gh actions-cache delete $KEY -R Ocelot-Social-Community/Ocelot-Social --confirm