name: Check JSON on PR
on:
  pull_request:
    paths:
      - 'domains/**/*.json'

jobs:
  check_json:
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v2

      - name: Check JSON
        run: |
          for jsonfile in $(find domains -name "*.json"); do
            echo "\nProcessing ${jsonfile}"
            if ! cat ${jsonfile} | jq empty; then 
              echo "Failed parsing ${jsonfile}"
              exit 1
            fi
            REQUIRED_FIELDS=('subdomain' 'url' 'email')
            for field in ${REQUIRED_FIELDS[@]}; do
              if ! cat "${jsonfile}" | jq -e "has(\"${field}\")"; then
                echo "${field} does not exist in ${jsonfile}"
                exit 1
              fi
            done
            TYPE=$(jq -r '.type // "CNAME"' ${jsonfile})
            URL=$(jq -r '.url' ${jsonfile})
            if [ ${TYPE} = "CNAME" ] || [ -z ${TYPE} ]; then
              if echo ${URL} | grep -qE '^https?://[^/]*/.*'; then
                echo "URL in ${jsonfile} must not contain subdirectories for CNAME records."
                exit 1
              fi
            fi
          done