Class: LcshLookupInput

Inherits:
MeiMultiLookupInput show all
Defined in:
app/inputs/lcsh_lookup_input.rb

Instance Method Summary collapse

Methods inherited from MeiMultiLookupInput

#build_field_options, #inner_wrapper, #input_type

Instance Method Details

#buffer_each(collection) ⇒ Object

include WithHelpIcon



4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'app/inputs/lcsh_lookup_input.rb', line 4

def buffer_each(collection)
  collection.each_with_object('').with_index do |(value, buffer), index|
    #buffer << yield(value, index) if value.match(/http:\/\/id.loc.gov\/authorities\/subjects\//) || value.blank?
    if  value.blank?
      buffer << yield(value, index)
    elsif value.match(/http:\/\/id.loc.gov\/authorities\/subjects\//)
      english_label = nil
      default_label = nil
      any_match = nil

      repo = Mei::Loc.pop_graph(value)

      if repo.query(:subject=>::RDF::URI.new(value), :predicate=>Mei::Loc.qskos('prefLabel')).count > 0
        repo.query(:subject=>::RDF::URI.new(value), :predicate=>Mei::Loc.qskos('prefLabel')).each_statement do |result_statement|
          #LoC has blank nodes... see alts of http://id.loc.gov/authorities/subjects/sh85102696 ... these aren't literals.
          #LoC's blank node representation.... alt: to_s == "_:t829213" or check .resource? or check .node? or .id == 't829213'
          if result_statement.object.literal?
            if result_statement.object.language == :en
              english_label ||= result_statement.object.value
            elsif result_statement.object.language.blank?
              default_label ||= result_statement.object.value
            else
              any_match ||= result_statement.object.value
            end
          end
        end

        default_label ||= any_match
        english_label ||= default_label

        buffer << yield("#{english_label} (#{value})", index)
      end
    end
  end
end