Class: Gared::Googlebooks

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

Instance Method Summary collapse

Constructor Details

#initialize(api_key, page_size = '40') ⇒ Googlebooks

Returns a new instance of Googlebooks.



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# File 'lib/gared/googlebooks.rb', line 5

def initialize(api_key, page_size = '40')
  @options = {api_key: api_key, maxResults: page_size}
end

Instance Method Details

#query_publications_by_person(person, ctx = nil) ⇒ Object 



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# File 'lib/gared/googlebooks.rb', line 13

def query_publications_by_person(person, ctx = nil)
  url = "https://www.googleapis.com/books/v1/volumes?q=inauthor:#{uri_escape(person)}&filter=full&key=#{@options[:api_key]}&maxResults=#{@options[:maxResults]}"
  resp = JSON.parse(RestClient.get(url))

  total = resp['totalItems']
  ret = []
  if total > 0
    start_at = 0
    recs = resp['items']
    while recs.length < total
      start_at += @options[:maxResults]
      resp = JSON.parse(RestClient.get(url+"&startIndex=#{start_at}"))
      recs += resp['items']
      sleep 2 # respect the server and avoid flood-blocking
    end
    recs.each do |r|
      next unless r['accessInfo']['pdf']['isAvailable']
      p = Publication.new(ctx)
      p.source_id = r['id']
      p.scanned = true
      p.title = r['volumeInfo']['title']
      h = Holding.new
      h.source_id = r['id']
      h.source_name = 'Google Books'
      p.add_holding(h)
      ret << p
    end
  end
  return ret
end

#uri_escape(s) ⇒ Object 



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# File 'lib/gared/googlebooks.rb', line 8

def uri_escape(s)
  p = URI::Parser.new
  return p.escape(s)
end