Module: PaperclipArchiveProcessor::ClassMethods

Defined in:
lib/paperclip_archive_processor/integration.rb

Class Method Summary collapse

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/paperclip_archive_processor/integration.rb', line 11

def self.extended(base)
  base.module_eval do

    private

    def create_callback(name, &block)
      class_eval do
        define_method(name, &block)
      end
    end

    def define_before_save_callback(variable_name, attachment_name)
      name = "before_save_filter_for_#{attachment_name}"
      create_callback(name) do
        instance_variable_set(variable_name, try(attachment_name).dirty?)
        true
      end
      send(:before_save, name)
    end

    def define_after_save_callback(variable_name, attachment_name)
      name = "after_save_filter_for_#{attachment_name}"
      create_callback(name) do
        if instance_variable_get(variable_name)
          PaperclipArchiveProcessor::Processor.extract(try(attachment_name))
          true
        end
      end
      send(:after_save, name)
    end

    def define_processor_callbacks(attachment_name)
      variable_name = "@_#{attachment_name}_has_changed"
      define_before_save_callback(variable_name, attachment_name)
      define_after_save_callback(variable_name, attachment_name)
    end

    public

    alias has_attached_file_original has_attached_file

    def has_attached_file(name, options = {})
      has_attached_file_original(name, options)

      if options.delete(:extract_archive)
        define_processor_callbacks(name)
      end
    end
  end

end