name: Pull Request Check

on: [pull_request]

jobs:
  check-modified-files:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout
      uses: actions/checkout@v2

    - name: Check modified files
      run: |
        echo "Fetching origin/${{ github.base_ref }}"
        git fetch origin ${{ github.base_ref }}
    
        echo "Checking for changes outside 'build/' and 'src/' directories"
        OUTSIDE_CHANGE=$(git diff --name-only origin/${{ github.base_ref }} | grep -vE '^(build/|src/)' | tr -d '[:space:]')

    
        if [ ! -z "$OUTSIDE_CHANGE" ]; then
          echo "Error: Pull Request contains changes outside 'build/' and 'src/' directories."
          echo "The following files/directories are outside the allowed paths:"
          echo "$OUTSIDE_CHANGE"
          exit 1
        else
          echo "No changes outside 'build/' and 'src/' directories. Proceeding with the workflow."
          exit 0
        fi

    
    - name: Check group_name folder modifications
      run: |
        echo "Fetching origin/${{ github.base_ref }}"
        git fetch origin ${{ github.base_ref }}
    
        echo "Listing changed files from origin/${{ github.base_ref }}"
        CHANGED_FILES_LIST=$(git diff --name-only origin/${{ github.base_ref }})
        
        echo "List of changed files:"
        echo "$CHANGED_FILES_LIST"
    
        echo "Filtering changed files for specific directories"
        if echo "$CHANGED_FILES_LIST" | grep -E '^build/group_name|^src/group_name'; then
          echo "Error: Changes detected in restricted directories ('build/group_name' or 'src/group_name')."
          echo "Please ensure that your pull request does not modify files in these directories."
          echo "The following files triggered this error:"
          echo "$CHANGED_FILES_LIST" | grep -E '^build/group_name|^src/group_name'
          exit 1
        else
          echo "No changes in restricted directories detected. Proceeding with the workflow."
          exit 0
        fi
        
    - name: Check for newly created files in src/ and build/
      run: |
        echo "Checking for newly created files in 'src/' and 'build/' directories"
    
        # Fetch the base branch
        git fetch origin ${{ github.base_ref }}
    
        # List only newly created files, excluding directories
        NEW_FILES=$(git diff --name-only --diff-filter=A origin/${{ github.base_ref }} | grep -E '^(build/|src/)[^/]+$' | tr -d '[:space:]') 
    
        echo "List of new files:"
        echo "$NEW_FILES"
    
        if [ ! -z "$NEW_FILES" ]; then
          echo "Error: New files have been created in 'src/' or 'build/' directories."
          echo "Creating new files in these directories is not allowed in this workflow."
          echo "The following files triggered this error:"
          echo "$NEW_FILES"
          exit 1
        else
          echo "No new files in 'src/' or 'build/' directories. Proceeding with the workflow."
          exit 0
        fi