Class: WorldcatIdentities

Inherits:
Service
  • Object
show all
Includes:
MetadataHelper
Defined in:
app/service_adaptors/worldcat_identities.rb

Overview

. SRU was too slow and was timing out the background service. (because SRU parses the response with REXML? we don't want to have anything

to do with REXML! Even still retrieving the large XML file and traversing
it with Hpricot (what we used to use) was still rather slow. The suggestion is to enable few
note_types and then constrain the number shown. The defaults are hopefully 
sane in this regard. note_types can be set to false to turn them off.

Also can create an optional link to Wikipedia.

There's probably a lot more we could pull out of these identities pages if
we wanted to. If more of these are used they might warrant their own 
service type and part of the page for better layout.

Constant Summary collapse

RELATOR_CODES =

relator codes are from worldcat.org/identities/relators.xml which was referenced from worldcat.org/identities/Identities.xsl

{
  "act" => "Actor",
  "adp" => "Adapter",
  "aft" => "Author of afterword, colophon, etc.",
  "anm" => "Animator ",
  "ann" => "Annotator",
  "ant" => "Bibliographic antecedent",
  "app" => "Applicant",
  "aqt" => "Author in quotations or text abstracts",
  "arc" => "Architect",
  "arr" => "Arranger",
  "art" => "Artist",
  "asg" => "Assignee",
  "asn" => "Associated name",
  "att" => "Attributed name",
  "auc" => "Auctioneer",
  "aud" => "Author of dialog",
  "aui" => "Author of introduction",
  "aus" => "Author of screenplay",
  "aut" => "Author",
  "bdd" => "Binding designer",
  "bjd" => "Bookjacket designer",
  "bkd" => "Book designer",
  "bkp" => "Book producer",
  "bnd" => "Binder",
  "bpd" => "Bookplate designer",
  "bsl" => "Bookseller",
  "ccp" => "Conceptor",
  "chr" => "Choreographer",
  "clb" => "Collaborator",
  "cli" => "Client",
  "cll" => "Calligrapher",
  "clt" => "Collotyper",
  "cmm" => "Commentator",
  "cmp" => "Composer",
  "cmt" => "Compositor",
  "cng" => "Cinematographer ",
  "cnd" => "Conductor",
  "cns" => "Censor",
  "coe" => "Contestant -appellee",
  "col" => "Collector",
  "com" => "Compiler",
  "cos" => "Contestant",
  "cot" => "Contestant -appellant",
  "cov" => "Cover designer",
  "cpc" => "Copyright claimant",
  "cpe" => "Complainant-appellee",
  "cph" => "Copyright holder",
  "cpl" => "Complainant",
  "cpt" => "Complainant-appellant",
  "cre" => "Creator",
  "crp" => "Correspondent",
  "crr" => "Corrector",
  "csl" => "Consultant",
  "csp" => "Consultant to a project",
  "cst" => "Costume designer",
  "ctb" => "Contributor",
  "cte" => "Contestee-appellee",
  "ctg" => "Cartographer",
  "ctr" => "Contractor",
  "cts" => "Contestee",
  "ctt" => "Contestee-appellant",
  "cur" => "Curator",
  "cwt" => "Commentator for written text",
  "dfd" => "Defendant",
  "dfe" => "Defendant-appellee",
  "dft" => "Defendant-appellant",
  "dgg" => "Degree grantor",
  "dis" => "Dissertant",
  "dln" => "Delineator",
  "dnc" => "Dancer",
  "dnr" => "Donor",
  "dpc" => "Depicted",
  "dpt" => "Depositor",
  "drm" => "Draftsman",
  "drt" => "Director",
  "dsr" => "Designer",
  "dst" => "Distributor",
  "dte" => "Dedicatee",
  "dto" => "Dedicator",
  "dub" => "Dubious author",
  "edt" => "Editor",
  "egr" => "Engraver",
  "elt" => "Electrotyper",
  "eng" => "Engineer",
  "etr" => "Etcher",
  "exp" => "Expert",
  "fac" => "Facsimilist",
  "flm" => "Film editor",
  "fmo" => "Former owner",
  "fpy" => "First party",
  "fnd" => "Funder",
  "frg" => "Forger",
  "grt" => "Graphic technician",
  "hnr" => "Honoree",
  "hst" => "Host",
  "ill" => "Illustrator",
  "ilu" => "Illuminator",
  "ins" => "Inscriber",
  "inv" => "Inventor",
  "itr" => "Instrumentalist",
  "ive" => "Interviewee",
  "ivr" => "Interviewer",
  "lbt" => "Librettist",
  "lee" => "Libelee-appellee",
  "lel" => "Libelee",
  "len" => "Lender",
  "let" => "Libelee-appellant",
  "lgd" => "Lighting designer ",
  "lie" => "Libelant-appellee",
  "lil" => "Libelant",
  "lit" => "Libelant-appellant",
  "lsa" => "Landscape architect",
  "lse" => "Licensee",
  "lso" => "Licensor",
  "ltg" => "Lithographer",
  "lyr" => "Lyricist",
  "mfr" => "Manufacturer ",
  "mdc" => "Metadata contact",
  "mod" => "Moderator",
  "mon" => "Monitor",
  "mrk" => "Markup editor",
  "mte" => "Metal-engraver",
  "mus" => "Musician",
  "nrt" => "Narrator",
  "opn" => "Opponent",
  "org" => "Originator",
  "orm" => "Organizer of meeting",
  "oth" => "Other",
  "own" => "Owner",
  "pat" => "Patron",
  "pbd" => "Publishing director",
  "pbl" => "Publisher",
  "pfr" => "Proofreader",
  "pht" => "Photographer",
  "plt" => "Platemaker",
  "pop" => "Printer of plates",
  "ppm" => "Papermaker",
  "ppt" => "Puppeteer ",
  "prc" => "Process contact",
  "prd" => "Production personnel",
  "prf" => "Performer",
  "prg" => "Programmer",
  "prm" => "Printmaker",
  "pro" => "Producer",
  "prt" => "Printer",
  "pta" => "Patent applicant",
  "pte" => "Plaintiff -appellee",
  "ptf" => "Plaintiff",
  "pth" => "Patent holder",
  "ptt" => "Plaintiff-appellant",
  "rbr" => "Rubricator",
  "rce" => "Recording engineer",
  "rcp" => "Recipient",
  "red" => "Redactor",
  "ren" => "Renderer",
  "res" => "Researcher",
  "rev" => "Reviewer",
  "rpt" => "Reporter",
  "rpy" => "Responsible party",
  "rse" => "Respondent -appellee",
  "rsg" => "Restager ",
  "rsp" => "Respondent",
  "rst" => "Respondent-appellant",
  "rth" => "Research team head",
  "rtm" => "Research team member",
  "sad" => "Scientific advisor",
  "sce" => "Scenarist",
  "scl" => "Sculptor",
  "scr" => "Scribe",
  "sec" => "Secretary",
  "sgn" => "Signer",
  "sng" => "Singer",
  "spk" => "Speaker",
  "spn" => "Sponsor",
  "spy" => "Second party",
  "srv" => "Surveyor",
  "std" => "Set designer ",
  "stl" => "Storyteller",
  "stn" => "Standards body",
  "str" => "Stereotyper",
  "tch" => "Teacher ",
  "ths" => "Thesis advisor",
  "trc" => "Transcriber",
  "trl" => "Translator",
  "tyd" => "Type designer",
  "tyg" => "Typographer",
  "vdg" => "Videographer ",
  "voc" => "Vocalist",
  "wam" => "Writer of accompanying material",
  "wdc" => "Woodcutter",
  "wde" => "Wood -engraver",
  "wit" => "Witness"    
}

Constants inherited from Service

Service::LinkOutFilterTask, Service::StandardTask

Instance Attribute Summary collapse

Attributes inherited from Service

#group, #name, #priority, #request, #service_id, #status, #task

Instance Method Summary collapse

Methods included from MetadataHelper

#get_doi, #get_epage, #get_gpo_item_nums, #get_identifier, #get_isbn, #get_issn, #get_lccn, #get_month, #get_oclcnum, #get_pmid, #get_search_creator, #get_search_terms, #get_search_title, #get_spage, #get_sudoc, #get_top_level_creator, #get_year, #normalize_lccn, #normalize_title, #raw_search_title, title_is_serial?

Methods included from MarcHelper

#add_856_links, #edition_statement, #get_title, #get_years, #gmd_values, #service_type_for_856, #should_skip_856_link?, #strip_gmd

Methods inherited from Service

#credits, #handle_wrapper, #link_out_filter, #preempted_by, required_config_params, #response_url, #translate

Constructor Details

#initialize(config) ⇒ WorldcatIdentities

Returns a new instance of WorldcatIdentities


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# File 'app/service_adaptors/worldcat_identities.rb', line 42

def initialize(config)
  @url = 'http://worldcat.org/identities/search/'
  @note_types = ["combined_counts"]
  @display_name = "WorldCat Identities"
  @require_identifier = false
  # any plural note_types can be restrained 
  @num_of_roles = 5
  @num_of_works = 1
  @num_of_genres = 5
  @wikipedia_link = true
  @openurl_widely_held = true
  @worldcat_widely_held = false
  @openurl_base  = '/resolve'
  
  @credits = {
    "WorldCat Identities" => "http://www.worldcat.org/identities/"
  }
  
  super(config)
end

Instance Attribute Details

#display_nameObject (readonly)

Returns the value of attribute display_name


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def display_name
  @display_name
end

#note_typesObject (readonly)

Returns the value of attribute note_types


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def note_types
  @note_types
end

#num_of_genresObject (readonly)

Returns the value of attribute num_of_genres


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def num_of_genres
  @num_of_genres
end

#num_of_rolesObject (readonly)

Returns the value of attribute num_of_roles


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def num_of_roles
  @num_of_roles
end

#num_of_subject_headingsObject (readonly)

Returns the value of attribute num_of_subject_headings


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def num_of_subject_headings
  @num_of_subject_headings
end

#num_of_worksObject (readonly)

Returns the value of attribute num_of_works


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def num_of_works
  @num_of_works
end

#openurl_baseObject (readonly)

Returns the value of attribute openurl_base


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def openurl_base
  @openurl_base
end

#require_identifierObject (readonly)

Returns the value of attribute require_identifier


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def require_identifier
  @require_identifier
end

#urlObject (readonly)

Returns the value of attribute url


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def url
  @url
end

Returns the value of attribute wikipedia_link


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# File 'app/service_adaptors/worldcat_identities.rb', line 33

def wikipedia_link
  @wikipedia_link
end

Instance Method Details

#circular_link?(request, citation_info) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'app/service_adaptors/worldcat_identities.rb', line 299

def circular_link?(request, citation_info)
  rft = request.referent
  request_oclcnum = get_identifier(:info, "oclcnum", rft)
  request_title = get_search_title(rft)
  return true if citation_info['oclcnum'] == request_oclcnum
  #further cleaning might be necessary for titles to be good matches
  return true if citation_info['title'].strip == request_title.strip
end

#clean_name(name) ⇒ Object

We might have to remove certain characters, but for now we just CGI.escape it and remove any periods


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# File 'app/service_adaptors/worldcat_identities.rb', line 129

def clean_name(name)
  CGI.escape(name).gsub('.', '')
end

#clean_oclcnum(num) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 386

def clean_oclcnum(num)
  if num =~ /(ocn0*|ocm0*|on0*|\(OCoLC\)|ocl70*|0+)(.*)$/
    num = $2
  end
  return num
end

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# File 'app/service_adaptors/worldcat_identities.rb', line 154

def create_link(request, xml)
  display_name = "About " + extract_display_name(xml)
  extracted_notes = extract_notes(xml) if @note_types
  url = extract_url(xml)
  create_service_response(request, display_name, url, extracted_notes )
end

#create_openurl(request, wh) ⇒ Object

createsa minimal openurl to make a new request to umlaut


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# File 'app/service_adaptors/worldcat_identities.rb', line 309

def create_openurl(request, wh)
   = request.referent.
  
  co = OpenURL::ContextObject.new
  cor = co.referent
  cor.set_format(wh['record_type'])
  cor.add_identifier("info:oclcnum/#{wh['oclcnum']}")
  cor.('aulast', ['aulast'] ) if ['aulast']
  cor.('aufirst', ['aufirst']) if ['aufirst']
  cor.('aucorp', ['aucorp']) if ['aucorp']
  cor.('title', wh['title'])
  link = @openurl_base + '?' + co.kev
  return link
end

#create_openurl_widely_held(request, xml) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 284

def create_openurl_widely_held(request, xml)
  widely_held = get_widely_held_info(xml)
  # try to remove circular links
  return nil if circular_link?(request, widely_held)
  
  openurl = create_openurl(request, widely_held) 
  
  request.add_service_response( 
      :service=>self,    
      :url=>openurl,
      :display_text=> widely_held['title'],
      :notes => "This author's most widely held work.",
      :service_type_value => :highlighted_link) 
end

#create_service_response(request, display_name, url, extracted_notes) ⇒ Object


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

def create_service_response(request, display_name, url, extracted_notes)
  request.add_service_response( 
      :service=>self,    
      :url=>url,
      :display_text=>display_name,
      :notes => extracted_notes,
      :service_type_value => :highlighted_link)
end

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# File 'app/service_adaptors/worldcat_identities.rb', line 269

def create_wikipedia_link(request, xml)
  name_element =  xml.at("wikiLink")
  return nil unless name_element
  name = name_element.inner_text
  # This is the base link that worldcat identities uses so we use the same
  link = "http://en.wikipedia.org/wiki/Special:Search?search=" << name
  request.add_service_response( 
      :service=>self,    
      :url=>link,
      :display_text=> "About " + name.titlecase,
      :notes => '', 
      :source => 'Wikipedia',
      :service_type_value => :highlighted_link)
end

#create_worldcat_widely_held(request, xml) ⇒ Object

We just link to worldcat using the oclc number provided FIXME this might need special partial if we incorporate a cover image


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# File 'app/service_adaptors/worldcat_identities.rb', line 326

def create_worldcat_widely_held(request, xml)
  
  # try to prevent circular links
  top_holding_info = get_widely_held_info(xml) 
  return nil if circular_link?(request, top_holding_info)    
  
  # http://www.worldcat.org/links/
  most = top_holding_info['most']
  title = top_holding_info['title']
  oclcnum = top_holding_info['oclcnum']
  
  link = 'http://www.worldcat.org/oclc/' << oclcnum
  cover_image_link = extract_cover_image_link(request, most)    
  notes = "this author's most widely held work in WorldCat"
   if  cover_image_link 
    display_text = '<img src="' << cover_image_link << '" style="width:75px;"/>' 
    notes = title << ' is ' << notes
  else
    display_text = title
  end
  
  request.add_service_response( 
      :service=>self,    
      :url=>link,
      :display_text=> display_text,
      :notes => notes,
      :service_type_value => :highlighted_link) 
end

#define_query(rft) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 72

def define_query(rft)
  oclcnum = get_identifier(:info, "oclcnum", rft)
   = rft.
  
  # Do we have enough info to do a query with sufficient precision?
  # We are choosing better recall in exchange for lower precision. 
  # We'll search with oclcnum if we have it, but not require it, we'll search
  # fuzzily on various parts of the name if neccesary.
  if ( oclcnum.blank? && ( ['aulast'].blank? || ['aufirst'].blank? ) && ['au'].blank? && ['aucorp'].blank?  ) or (oclcnum.blank? && @require_identifier) 
    Rails.logger.debug("Worldcat Identities Service Adaptor: Skipped: Insufficient metadata for lookup")      
    return nil
  end
  
  
  # instead of searching across all indexes we target the one we want
  name_operator = "%3D"
  if ((! ['aulast'].blank?) && oclcnum)
    # Just last name is enough, we have an oclcnum.       
    index = 'PersonalIdentities'
    name_part = 'FamilyName'
    name = clean_name(['aulast'])
  elsif (! ['au'].blank? )
    # Next choice, undivided author string
    index = "PersonalIdentities"
    name_part = 'Name'
    name = clean_name(['au'])
    name_operator = "all"
  elsif (not ['aulast'].blank? and not ['aufirst'].blank?)
    # combine them.
    index = "PersonalIdentities"
    name_part = 'Name'
    name = clean_name(['aufirst'] + ' ' + ['aulast'])
    name_operator = "all"
  elsif ['aucorp']
    # corp name
    index = 'CorporateIdentities'
    name_part = 'Name'
    name = clean_name(['aucorp'])
  else
    # oclcnum but no author information at all! Might still work...
    index = "Identities"
  end

  query_conditions = []
  query_conditions << "local.#{name_part}+#{name_operator}+%22#{name}%22" if name    
  query_conditions << "local.OCLCNumber+%3D+%22#{CGI.escape(oclcnum)}%22" unless oclcnum.blank?

  query = query_conditions.join("+and+")
  
  # Sort keys is important when we don't have an oclcnumber, and doesn't hurt
  # when we do. 
  query += "&sortKeys=holdingscount"
  return index, query 
end

#do_query(request, index, query) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 133

def do_query(request, index, query)
  # since we're only doing exact matching with last name and OCLCnum
  # we only request 1 record to hopefully speed things up.
  link = @url + index + '?query=' +query + "&maximumRecords=1"

  result = open(link, "Accept" => "text/xml").read
  xml = Nokogiri::XML(result)
  
  # Identities namespaces are all over the place, it's too hard
  # to interrogate with namespaces, ask nokogiri to remove them all
  # instead. 
  xml.remove_namespaces!
  
  return nil if xml.at("numberOfRecords").inner_text == '0'
 
  create_link(request, xml)
  create_wikipedia_link(request, xml) if @wikipedia_link
  create_openurl_widely_held(request, xml) if @openurl_widely_held
  create_worldcat_widely_held(request, xml) if @worldcat_widely_held
end

#extract_combined_counts(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 229

def extract_combined_counts(doc)
  work_count = extract_work_count(doc)
  publications_count = extract_publications_count(doc)
  holdings_count = extract_holdings_count(doc)
  work_count << " in " << publications_count << " with " <<
    holdings_count
end

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# File 'app/service_adaptors/worldcat_identities.rb', line 364

def extract_cover_image_link(request, citation)
  cover = citation.at("cover")
  return nil unless cover
  # we try not to show a cover if we already probably have the same cover 
  # showing.
  oclc = clean_oclcnum( cover.attributes['oclc'] )
   = request.referent.
  if ['oclcnum'] and ['oclcnum'] =~ oclc
    return nil
  end 
  cover_number = cover.inner_text
  if ['isbn'] and ['isbn'] == cover_number
    return nil
  end
  
  if cover.attributes["type"] == 'isbn'
    link = "http://www.worldcat.org/wcpa/servlet/DCARead?standardNoType=1&standardNo="
    return link << cover_number
  end
  return nil
end

#extract_display_name(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 174

def extract_display_name(doc)
  name = []    
  rawname = doc.at("nameInfo/rawName")
  return nil unless rawname
  rawname.children.each do |name_part|
    name << name_part.inner_text      
  end
  return nil if name.blank?
  return name.join(' ')
end

#extract_genres(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 219

def extract_genres(doc)
  genres = []
  doc.search("genres/genre").each_with_index do |g, i|
    genres << g.inner_text
    break if @num_of_genres == i + 1
  end
  return nil if genres.blank?
  "genres: " + genres.join(', ')
end

#extract_holdings_count(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 242

def extract_holdings_count(doc)
  total_holdings = doc.at("totalHoldings").inner_text
  return insert_commas(total_holdings) << " total holdings in WorldCat"
end

#extract_notes(xml) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 161

def extract_notes(xml)    
  note_pieces = []    
  # a tiny bit of metaprogramming to make it easy to add methods and config
  # for note_types
  @note_types.each do |nt|
    method = ("extract_" + nt).to_sym  
    answer = self.send(method, xml)
    note_pieces << answer unless answer.nil?
  end
 return nil if note_pieces.blank? 
 return note_pieces.join(' | ')
end

#extract_publications_count(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 247

def extract_publications_count(doc)
  return insert_commas( doc.at("recordCount").inner_text ) << " publications"
end

#extract_roles(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 195

def extract_roles(doc)
  codes = []
  (doc.search("relators/relator")).each_with_index do |relate, i|
    codes << relate.attributes['code']
    break if @num_of_roles == i + 1
  end
  return nil if codes.blank?
  roles = codes.map{|code| RELATOR_CODES[code] }
  "roles: " + roles.join(', ')
end

#extract_subject_headings(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 185

def extract_subject_headings(doc)
  subject_headings = []
  (doc.search("biogSH")).each_with_index do |sh, i|
    subject_headings << sh.inner_text
    break if @num_of_subject_headings == i + 1
  end
  return nil if subject_headings.blank?
  "subject headings: " + subject_headings.join('; ')
end

#extract_url(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 251

def extract_url(doc)
  pnkey = doc.at("pnkey").inner_text
  return 'http://worldcat.org/identities/' << pnkey
end

#extract_work_count(doc) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 237

def extract_work_count(doc)
  work_count = doc.at("workCount").inner_text
  return insert_commas(work_count)  << " works"
end

#extract_works(doc) ⇒ Object

FIXME a lot more could be done with “by citations”. identities gives summaries of the most popular works as well as other descriptive information like subject headings. This might be able to be used for enhancing metadata.


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# File 'app/service_adaptors/worldcat_identities.rb', line 209

def extract_works(doc)
  works = []
  doc.search("by/citation/title").each_with_index do |t, i|
    works << t.inner_text
    break if @num_of_works == i + 1
  end
  return nil if works.blank?
  "most widely held #{works.length == 1 ? "work" : "works"}: " + works.join("; ")
end

#get_widely_held_info(xml) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 355

def get_widely_held_info(xml)
  h = {}
  h['most'] = most = xml.at("by/citation")
  h['oclcnum'] = clean_oclcnum(most.at("oclcnum").inner_text)
  h['title'] = most.at("title").inner_text
  h['record_type'] = most.at('recordType').inner_text
  h
end

#handle(request) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 63

def handle(request)
  index, query = define_query(request.referent)
  
  unless query.blank?
    do_query(request, index, query)
  end
  return request.dispatched(self, true)    
end

#insert_commas(n) ⇒ Object


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# File 'app/service_adaptors/worldcat_identities.rb', line 256

def insert_commas(n)
  n.reverse.scan(/(?:\d*\.)?\d{1,3}-?/).join(',').reverse
end

#service_types_generatedObject


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# File 'app/service_adaptors/worldcat_identities.rb', line 38

def service_types_generated
  return [ ServiceTypeValue[:highlighted_link] ]
end