name: Keep Repository Active

on:
  schedule:
    # Runs at 00:00 UTC every Monday
    - cron: '0 0 * * 1'
  
  # Allow manual trigger for testing
  workflow_dispatch:

jobs:
  update-dummy:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        
      - name: Modify dummy file
        run: |
          if grep -q " $" DUMMY.txt; then
            # If file ends with space, remove it
            sed -i 's/ $//' DUMMY.txt
          else
            # If file doesn't end with space, add one
            echo -n " " >> DUMMY.txt
          fi
      
      - name: Commit and push if changed
        run: |
          git config --global user.name 'GitHub Action'
          git config --global user.email 'action@github.com'
          git add DUMMY.txt
          git diff --quiet && git diff --staged --quiet || (git commit -m "Update DUMMY.txt to keep repository active" && git push)