name: header check

on:
  push:
    paths:
      - '**.go'
  pull_request:
    paths:
      - '**.go'

jobs:
  check-headers:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: check license headers
        run: |
          missing_headers=()

          while IFS= read -r -d '' file; do
            # skip test files and generated files
            if [[ "$file" == *"_test.go" ]]; then
              continue
            fi

            # check if file starts with the license header (signature is on line 4)
            if ! head -n 5 "$file" | grep -q "█▀ █ █▀▀"; then
              missing_headers+=("$file")
            fi
          done < <(find . -name "*.go" -type f -print0)

          if [ ${#missing_headers[@]} -ne 0 ]; then
            echo "::error::the following files are missing the license header:"
            printf '%s\n' "${missing_headers[@]}"
            echo ""
            echo "expected header format:"
            echo '/*'
            echo '·━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━·'
            echo ':                                                                               :'
            echo ':   █▀ █ █▀▀   ·   Blazing-fast pentesting suite                                :'
            echo ':   ▄█ █ █▀    ·   BSD 3-Clause License                                         :'
            echo ':                                                                               :'
            echo ':   (c) 2022-2025 vmfunc (Celeste Hickenlooper), xyzeva,                        :'
            echo ':                 lunchcat alumni & contributors                                :'
            echo ':                                                                               :'
            echo '·━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━·'
            echo '*/'
            exit 1
          fi

          echo "all go files have proper license headers"