Class: DBLPQuery

Inherits:
Object
  • Object
show all
Defined in:
lib/dblp/query.rb

Constant Summary collapse

BASE_URI = 
"http://dblp.mpi-inf.mpg.de/autocomplete-php/autocomplete/ajax.php"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DBLPQuery

Returns a new instance of DBLPQuery.



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# File 'lib/dblp/query.rb', line 12

def initialize
  @result = []

  @params = {
    :name => "dblpmirror",
    :path => "/dblp-mirror/",
    :page => "index.php",
    :log => "/var/opt/completesearch/log/completesearch.error_log",
    :qid => 6,
    :navigation_mode => "history",
    :language => "en",
    :mcsr => 40,
    :mcc => 0,
    :mcl => 80,
    :hpp => 20,
    :eph => 1,
    :er => 20,
    :dm => 3,
    :bnm => "R",
    :ll => 2,
    :mo => 100,
    :accc => ":",
    :syn => 0,
    :deb => 0,
    :hrd => "1a",
    :hrw => "1d",
    :qi => 1,
    :fh => 1,
    :fhs => 1,
    :mcs => 20,
    :rid => 0,
    :qt => "H"
  }

end

Instance Attribute Details

#params ⇒ Object

Returns the value of attribute params.



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# File 'lib/dblp/query.rb', line 10

def params
  @params
end

#result ⇒ Object

Returns the value of attribute result.



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# File 'lib/dblp/query.rb', line 10

def result
  @result
end

Instance Method Details

#cite(num) ⇒ Object 



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# File 'lib/dblp/query.rb', line 117

def cite(num)
  "\\cite{#{select(num)}}"
end

#extreact_from_body(body) ⇒ Object 



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# File 'lib/dblp/query.rb', line 76

def extreact_from_body(body)
  raw = body.split("\n")[27][11..-2].gsub("'", "\"")
  full = JSON.parse(raw)
  full["body"]
end

#parse_table(body) ⇒ Object 



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# File 'lib/dblp/query.rb', line 82

def parse_table(body)
  result = []

  body.scan(/<tr>(.*?)<\/tr>/m) do |match|
    
    cells = match[0].scan(/<td.*?>(.*?)<\/td>/m)
    next unless cells.size == 3
    
    obj = OpenStruct.new
    # First Cell is the cite key
    obj.cite = "DBLP:" << cells[0][0].match(/href="http:\/\/dblp\.uni-trier\.de\/rec\/bibtex\/(.*?)">/)[1]

    # second cell the link to the electronic version

    # Third cell is author + title
    obj.title = cells[2][0].gsub(/<.*?>/,"")

    result << obj
  end
  result
end

#present ⇒ Object 



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# File 'lib/dblp/query.rb', line 111

def present
  @result.each_with_index do |item, i|
    puts "\t#{i+1}\t#{item.title}\n"
  end
end

#query(what) ⇒ Object 



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# File 'lib/dblp/query.rb', line 49

def query(what)

  # Make some simple means of caching
  return if @params["query"] == what

  @params["query"] = what

  url = URI.parse(BASE_URI)
  req = Net::HTTP::Post.new(url.path)

  req.set_form_data(@params)
  res = Net::HTTP.new(url.host, url.port).start {|http| http.request(req) }

  case res
  when Net::HTTPSuccess, Net::HTTPRedirection
    # OK
    puts "Success"
    body = extreact_from_body(res.body)
    parse_table(body)
    @result = parse_table(body)
  else
    res.error!
  end

end

#select(num) ⇒ Object

Based on the last result that was fetched, a new cite key is returned based on the position inside the result.



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# File 'lib/dblp/query.rb', line 106

def select(num)
  return if @result.size == 0 || @result.size < num
  return @result[num.abs].cite
end