Method: OpenLibrary#enhance_metadata

Defined in:
app/service_adaptors/open_library.rb

#enhance_metadata(referent, editions) ⇒ Object 



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# File 'app/service_adaptors/open_library.rb', line 260

def enhance_metadata(referent, editions)
  # Which one should we use to enhance? Whichever has the largest
  # oclcnum, or if none of them have an oclcnum, then whichever
  # has the most metadata elements. 
  winner = nil
  winner_oclcnum = 0
  winner_numfields = 0
  editions.each do |e|
    score = score_metadata(e)
    if ( ( score[:oclcnum] && score[:oclcnum] > winner_oclcnum ) ||
         ( winner_oclcnum == 0 && score[:numfields] > winner_numfields)) 
         winner = e
         winner_oclcnum = score[:oclcnum] if score[:oclcnum]
         winner_numfields = score[:numfields]
    end
  end

  if (winner)
    referent.enhance_referent("title", winner["title"], true, false, {:overwrite=>false}) unless winner["title"].blank?
    
    referent.enhance_referent("pub", winner["publishers"].join(","), true, false, {:overwrite=>false}) unless winner["publishers"].blank?
    
    referent.enhance_referent("date", winner["publish_date"], true, false, {:overwrite=>false}) if winner["publish_date"] =~ /^\d\d\d\d$/
    
    referent.enhance_referent("pub", winner["publish_places"].join(","), true, false, {:overwrite=>false}) unless winner["publish_places"].blank?
    
    referent.enhance_referent("lccn", winner["lccn"][0], true, false, {:overwrite=>false}) unless winner["lccn"].blank?

    # ISBN, prefer 13 if possible
    referent.enhance_referent("isbn", winner["isbn_13"][0], true, false, {:overwrite=>false}) unless winner["isbn_13"].blank?
    
    referent.enhance_referent("isbn", winner["isbn_10"][0], true, false, {:overwrite=>false}) if winner["isbn_13"].blank? && ! winner["isbn_10"].blank?

    referent.enhance_referent("oclcnum", winner["oclc_numbers"][0], true, false, {:overwrite=>false}) unless winner["oclc_numbers"].blank?
    
  end    
    
end