module FileMutate
  module RemoveContent
    def remove_content options=nil, &block
      opt_str = case options
                when String
                  options
                when Hash
                  content = options[:content] || options[:where]
                  raise ArgumentError, "Bad :content value in Hash" if !content || content.strip.empty?
                  content.strip
                else
                  raise ArgumentError, "non-block argument must be either String or Hash with a :content option" if !block
                end
      content = block ? yield : opt_str

      File.remove_content_from self.path, :content => content, :with => '', &block
    end
    alias_method :remove, :remove_content

    module ClassMethods
      def remove_from file_name, content=nil, &block
        content ||= yield
        replace_content_from file_name, :content => content, :with => '', &block
      end

      def remove_content_from file_name, options = {}, &block
        replace_content_from file_name, options.merge(:with => ''), &block
      end
    end
  end
end