Module: CurationConcerns::FileSet::Derivatives

Extended by:
ActiveSupport::Concern
Included in:
CurationConcerns::FileSetBehavior
Defined in:
app/models/concerns/curation_concerns/file_set/derivatives.rb

Instance Method Summary collapse

Instance Method Details

#create_derivatives(filename) ⇒ Object

This completely overrides the version in Hydra::Works so that we read and write to a local file. It’s important that characterization runs before derivatives so that we have a credible mime_type field to work with.



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# File 'app/models/concerns/curation_concerns/file_set/derivatives.rb', line 16

def create_derivatives(filename)
  case mime_type
  when *self.class.pdf_mime_types
    Hydra::Derivatives::PdfDerivatives.create(filename,
                                              outputs: [{ label: :thumbnail, format: 'jpg', size: '338x493', url: derivative_url('thumbnail') }])
    Hydra::Derivatives::FullTextExtract.create(filename,
                                               outputs: [{ url: uri, container: "extracted_text" }])
  when *self.class.office_document_mime_types
    Hydra::Derivatives::DocumentDerivatives.create(filename,
                                                   outputs: [{ label: :thumbnail, format: 'jpg',
                                                               size: '200x150>',
                                                               url: derivative_url('thumbnail') }])
    Hydra::Derivatives::FullTextExtract.create(filename,
                                               outputs: [{ url: uri, container: "extracted_text" }])
  when *self.class.audio_mime_types
    Hydra::Derivatives::AudioDerivatives.create(filename,
                                                outputs: [{ label: 'mp3', format: 'mp3', url: derivative_url('mp3') },
                                                          { label: 'ogg', format: 'ogg', url: derivative_url('ogg') }])
  when *self.class.video_mime_types
    Hydra::Derivatives::VideoDerivatives.create(filename,
                                                outputs: [{ label: :thumbnail, format: 'jpg', url: derivative_url('thumbnail') },
                                                          { label: 'webm', format: 'webm', url: derivative_url('webm') },
                                                          { label: 'mp4', format: 'mp4', url: derivative_url('mp4') }])
  when *self.class.image_mime_types
    Hydra::Derivatives::ImageDerivatives.create(filename,
                                                outputs: [{ label: :thumbnail, format: 'jpg', size: '200x150>', url: derivative_url('thumbnail') }])
  end
end