Class: Hydra::Derivatives::PersistBasicContainedOutputFileService

Inherits:
PersistOutputFileService show all
Defined in:
lib/hydra/derivatives/services/persist_basic_contained_output_file_service.rb

Overview

This Service is an implementation of the Hydra::Derivatives::PeristOutputFileService It supports basic contained files, which is the behavior associated with Fedora 3 file datastreams that were migrated to Fedora 4 and, at the time that this class was authored, corresponds to the behavior of ActiveFedora::Base.attach_file and ActiveFedora::Base.attached_files Rename this

Class Method Summary collapse

Methods inherited from PersistOutputFileService

determine_mime_type, determine_original_name

Class Method Details

.call(stream, directives) ⇒ Object

This method conforms to the signature of the .call method on Hydra::Derivatives::PeristOutputFileService

  • Persists the file within the object at destination_name

NOTE: Uses basic containment. If you want to use direct containment (ie. with PCDM) you must use a different service (ie. Hydra::Works::AddFileToGenericFile Service)

Parameters:

  • stream (#read) —

    the data to be persisted

  • directives (Hash) —

    directions which can be used to determine where to persist to.

Options Hash (directives):

  • url (String) —

    This can determine the path of the object.

Raises:

  • (ArgumentError) 


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# File 'lib/hydra/derivatives/services/persist_basic_contained_output_file_service.rb', line 15

def self.call(stream, directives)
  file = Hydra::Derivatives::IoDecorator.new(stream, new_mime_type(directives.fetch(:format)))
  o_name = determine_original_name(file)
  m_type = determine_mime_type(file)
  uri = URI(directives.fetch(:url))
  raise ArgumentError, "#{uri} is not an http uri" unless uri.scheme == 'http'
  remote_file = ActiveFedora::File.new(uri.to_s)
  remote_file.content = file
  remote_file.mime_type = m_type
  remote_file.original_name = o_name
  remote_file.save
end

.new_mime_type(format) ⇒ Object 



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# File 'lib/hydra/derivatives/services/persist_basic_contained_output_file_service.rb', line 28

def self.new_mime_type(format)
  case format
  when 'mp4'
    'video/mp4' # default is application/mp4
  when 'webm'
    'video/webm' # default is audio/webm
  else
    MIME::Types.type_for(format).first.to_s
  end
end