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Contents
# frozen_string_literal: true
require 'iiif/presentation'
module Spotlight
module Resources
# harvest Images from IIIF Manifest and turn them into a Spotlight::Resource
# Note: IIIF API : http://iiif.io/api/presentation/2.0
class IiifHarvester < Spotlight::Resource
self.weight = -5000
validate :valid_url?
def iiif_manifests
@iiif_manifests ||= IiifService.parse(url)
end
def self.indexing_pipeline
@indexing_pipeline ||= super.dup.tap do |pipeline|
pipeline.sources = [Spotlight::Etl::Sources::SourceMethodSource(:iiif_manifests)]
pipeline.transforms = [
->(data, p) { data.merge(p.source.to_solr(exhibit: p.context.resource.exhibit)) }
] + pipeline.transforms
end
end
private
def valid_url?
errors.add(:url, 'Invalid IIIF URL') unless url_is_iiif?(url)
end
def url_is_iiif?(url)
valid_content_types = ['application/json', 'application/ld+json']
req = Spotlight::Resources::IiifService.http_client.head(url)
req = Spotlight::Resources::IiifService.http_client.get(url) if req.status == 405
return unless req.success?
valid_content_types.any? do |valid_type|
req.headers['content-type'].include?(valid_type)
end
end
end
end
end
Version data entries
50 entries across 50 versions & 1 rubygems