pulibrary / bibdata / f04bc944-f9b4-4a42-8b26-dcacd0e3e688

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35.0
/marc_to_solr/lib/indigenous_languages.rb
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# frozen_string_literal: true
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# Identify materials in indigenous languages










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# from the Western Hemisphere










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module IndigenousLanguages




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  def in_an_indigenous_language?(record)




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    language_extractor = LanguageExtractor.new(record)




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    language_extractor.all_language_codes.any? { |code| language_codes.include? code } ||




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      language_extractor.possible_language_subject_headings.any? { |heading| subject_headings.include? heading }




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  end










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  def subject_headings




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    @subject_headings ||= fetch_subject_headings_from_file




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  end










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  def language_codes




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    @language_codes ||= fetch_language_codes_from_file




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  end










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  private




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    def fetch_subject_headings_from_file




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      column_name = 'LCSH for indigenous languages'




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      csv = CSV.read(File.join(File.dirname(__FILE__), 'augment_the_facet', 'indigenous_languages_western_hemisphere_lcsh.csv'), headers: true)




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      unless csv.headers.include? column_name




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        raise "Invalid CSV format, must have a column named \"#{column_name}\" containing LCSH"




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      end










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      csv[column_name]




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    end










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    def fetch_language_codes_from_file




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      csv = CSV.read(File.join(File.dirname(__FILE__), 'augment_the_facet', 'indigenous_languages_western_hemisphere_codes.csv'), headers: true)




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      column_contents = csv[csv.headers.first]




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      column_contents.select { |entry| entry&.length == 3 }




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                     .uniq










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    end










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end
























    

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