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require 'hydra/derivatives'
module Hydra::Works
class PersistDerivative < Hydra::Derivatives::PersistOutputFileService
##
# Persists a derivative to a FileSet
# This Service conforms to the signature of `Hydra::Derivatives::PersistOutputFileService`.
# The purpose of this Service is for use as an alternative to the default Hydra::Derivatives::PersistOutputFileService.
# It's necessary because the default behavior in Hydra::Derivatives assumes that you're using LDP Basic Containment.
# Hydra::Works::FileSets use IndirectContainment. This Service handles that case.
# This service will always update existing and does not do versioning of persisted files.
#
# @param [#read] stream the derivative filestream
# @param [Hash] directives
# @option directives [FileSet] :object the FileSet object to attach to
# @option directives [Symbol] :label the type of derivative
# extract file type symbol (e.g. :thumbnail) from Hydra::Derivatives created destination_name
def self.call(stream, directives)
file = Hydra::Derivatives::IoDecorator.new(stream)
file.mime_type = new_mime_type(directives.fetch(:format))
object = directives.fetch(:object)
type = directives.fetch(:label)
Hydra::Works::AddFileToFileSet.call(object, file, type, update_existing: true, versioning: false)
end
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
end
end
Version data entries
18 entries across 18 versions & 1 rubygems