class Playbook::PbAdvancedTable::TableHeader

def process_columns(columns, rows, current_depth, max_depth)
  total_columns = columns.size
  columns.each_with_index do |col, index|
    is_last = index == total_columns - 1
    if col[:columns]
      colspan = compute_leaf_columns(col[:columns])
      rows[current_depth] << {
        label: col[:label],
        colspan: colspan,
        is_last_in_group: is_last && current_depth.positive?,
      }
      process_columns(col[:columns], rows, current_depth + 1, max_depth)
    else
      raw_styling       = col[:column_styling] || {}
      header_alignment  = raw_styling[:header_alignment]
      colspan = 1
      rows[current_depth] << {
        label: col[:label],
        colspan: colspan,
        accessor: col[:accessor],
        sort_menu: col[:sort_menu],
        is_last_in_group: is_last && current_depth.positive?,
        header_alignment: header_alignment,
      }
    end
  end
end