Extract language

Author: fbacall

lib/tess/rdf/event_extractor.rb

@@ -36,6 +36,7 @@ def extract_params
         params[:prerequisites] = extract_course_prerequisites
         params[:learning_objectives] = markdownify_list extract_names_or_values(RDF::Vocab::SCHEMA.teaches)
         params[:target_audience] = extract_audience
+        params[:language] = extract_names_or_values(RDF::Vocab::SCHEMA.inLanguage).first
 
         remove_blanks(params)
       end

lib/tess/rdf/extraction.rb

@@ -255,6 +255,12 @@ def extract_mentions(subject: resource)
           [:mention, RDF::Vocab::SCHEMA.url, :url, { optional: true }]).map { |a| { title: a[:name], url: a[:url] } }.compact
       end
 
+      def extract_language(subject: resource)
+        query(
+          [subject, RDF::Vocab::SCHEMA.inLanguage, :language],
+          [:language, RDF::Vocab::SCHEMA.name, :language, { optional: true }])
+      end
+
       def extract_names_or_ids(predicate, subject: resource)
         query([subject, predicate, :thing],
               [:thing, RDF::Vocab::SCHEMA.name, :name, { optional: true }],

test/field_test.rb

@@ -256,6 +256,30 @@ class FieldTest < Test::Unit::TestCase
     assert_equal 'Patricia Palagi (https://orcid.org/0000-0001-9062-6303), SIB Swiss Institute of Bioinformatics (https://www.sib.swiss/), Someone, https://cool.guys',
                  course_instance_extractor(json).send(:extract_names_or_ids, RDF::Vocab::SCHEMA.organizer).join(', ')
   end
+
+  test 'extract language' do
+    json = %(
+[{
+  "@context": "https://schema.org/",
+  "@type": "CourseInstance",
+  "name": "Dummy Course",
+  "inLanguage": "en"
+}])
+    assert_equal 'en', course_instance_extractor(json).extract_params[:language]
+
+    json = %(
+[{
+  "@context": "https://schema.org/",
+  "@type": "CourseInstance",
+  "name": "Dummy Course",
+  "inLanguage": {
+    "@type": "Language",
+    "name" : "de"
+  }
+}])
+    assert_equal 'de', course_instance_extractor(json).extract_params[:language]
+  end
+
   private
 
   def course_extractor(fixture, format: :jsonld, base_uri: 'https://example.com/my.json')