Class: Gared::Aleph

Inherits:
Object
  • Object
show all
Defined in:
lib/gared/aleph.rb

Instance Method Summary collapse

Constructor Details

#initialize(host, port, database, syntax = 'USMARC') ⇒ Aleph

Returns a new instance of Aleph.



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# File 'lib/gared/aleph.rb', line 21

def initialize(host, port, database, syntax = 'USMARC')
  @options = {host: host, port: port, database: database, syntax: syntax}
end

Instance Method Details

#query_person(person) ⇒ Object 



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# File 'lib/gared/aleph.rb', line 27

def query_person(person)
end

#query_persons(q) ⇒ Object 



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# File 'lib/gared/aleph.rb', line 24

def query_persons(q)
end

#query_publication(publication) ⇒ Object 



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# File 'lib/gared/aleph.rb', line 33

def query_publication(publication)
end

#query_publications(q) ⇒ Object 



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# File 'lib/gared/aleph.rb', line 30

def query_publications(q)
end

#query_publications_by_person(person, ctx = nil) ⇒ Object 



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# File 'lib/gared/aleph.rb', line 36

def query_publications_by_person(person, ctx = nil)
  ZOOM::Connection.open(@options[:host], @options[:port]) do |conn|
    conn.database_name = @options[:database] # 'aleph.nli.org.il',9991
    conn.preferred_record_syntax = @options[:syntax]
    rset = conn.search("@attr 1=1003 @attr 2=3 @attr 4=1 \"#{person}\"")
    rr = rset.records
    return nil if rr.nil? or rr.empty?
    ret = []
    rr.each do |r|
      xml = Nokogiri::Slop(r.xml)
      xml.remove_namespaces! # keeps biting me :)
      # these scrapes are based on the National Library of Israel usage. No attempt to make it generic. :)
      p = Publication.new(ctx)
      begin
        p.author_line = xml.xpath('//datafield[@tag=\'100\']/subfield[@code=\'a\']')[0].text
        # puts "author: #{p.author_line}" # DEBUG
      rescue
        nil
      end
      begin
        p.title = xml.xpath('//datafield[@tag=\'245\']/subfield[@code=\'a\']')[0].text
        # puts "title: #{p.title}" # DEBUG
      rescue
        nil
      end
      begin
        p.notes = xml.xpath('//datafield[@tag=\'500\']/subfield[@code=\'a\']').collect{|note| note.text}.join("\n")
      rescue
        nil
      end
      begin
        h = Holding.new
        h.source_id = xml.xpath('//datafield[@tag=\'090\']/subfield[@code=\'a\']')[0].text
        h.source_name = @options[:database]
        p.add_holding(h)
        ret << p
      rescue
        nil # ignore records with no holdings; they may be archival files or other non-publications
      end # 
    end
    return ret
  end
end