Module: Lockbox::CarrierWaveExtensions

Defined in:
lib/lockbox/carrier_wave_extensions.rb

Instance Method Summary collapse

Instance Method Details

#encrypt(**options) ⇒ Object 



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# File 'lib/lockbox/carrier_wave_extensions.rb', line 3

def encrypt(**options)
  class_eval do
    before :cache, :encrypt

    def encrypt(file)
      @file = CarrierWave::SanitizedFile.new(lockbox_notify("encrypt_file") { lockbox.encrypt_io(file) })
    end

    # TODO safe to memoize?
    def read
      r = super
      lockbox_notify("decrypt_file") { lockbox.decrypt(r) } if r
    end

    def size
      read.bytesize
    end

    # based on CarrierWave::SanitizedFile#mime_magic_content_type
    def content_type
      MimeMagic.by_magic(read).try(:type) || "invalid/invalid"
    end

    def rotate_encryption!
      io = Lockbox::IO.new(read)
      io.original_filename = file.filename
      previous_value = enable_processing
      begin
        self.enable_processing = false
        store!(io)
      ensure
        self.enable_processing = previous_value
      end
    end

    private

    define_method :lockbox do
      @lockbox ||= begin
        table = model ? model.class.table_name : "_uploader"
        attribute = lockbox_name

        Utils.build_box(self, options, table, attribute)
      end
    end

    def lockbox_name
      if mounted_as
        mounted_as.to_s
      else
        uploader = self
        while uploader.parent_version
          uploader = uploader.parent_version
        end
        uploader.class.name.sub(/Uploader\z/, "").underscore
      end
    end

    def lockbox_notify(type)
      if defined?(ActiveSupport::Notifications)
        name = lockbox_name

        # get version
        version, _ = parent_version && parent_version.versions.find { |k, v| v == self }
        name = "#{name} #{version} version" if version

        ActiveSupport::Notifications.instrument("#{type}.lockbox", {name: name}) do
          yield
        end
      else
        yield
      end
    end
  end
end