Module: LCCallNumber

Defined in:
lib/lc_callnumber/lcc.rb,
lib/lc_callnumber/parser.rb,
lib/lc_callnumber/version.rb

Defined Under Namespace

Classes: CallNumber, Cutter, Decimal, FirstCutterSet, Lead, Parser, Transform, UnparseableCallNumber

Constant Summary collapse

VERSION = 
"0.1.1"

Class Method Summary collapse

Class Method Details

.parse(i) ⇒ Object 



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# File 'lib/lc_callnumber/lcc.rb', line 8

def self.parse(i)
  return UnparseableCallNumber.new(i) if i.nil?
  i.chomp!
  i.strip!
  orig = i
  i.gsub!(/\[(.+)\]/, "$1")
  i.gsub!('\\', ' ')

  # We also have a bunch that start with a slash and have slashes where you'd
  # expect logical breaks. Don't know why.

  if i =~ /\A\//
    i.gsub!('/', ' ')
  end

  # Ditch leading + or *
  i.gsub!(/\A[+*]/, '')

  # Strip off any leading/trailing spaces and upcase it
  i.strip!
  i.upcase!

  # Don't bother if it starts with a number, four letters, or the string 'law'
  # Don't bother if there's no numbers at all
  if (/\A\d/.match i) or
     (/\A[[:alpha:]]{4}/.match i) or
     (/\ALAW/i.match i) or
     !(/\d/.match i)
     return UnparseableCallNumber.new(orig)
  end

  begin
    p = @parser.parse(i)
    # puts p
    lc = @transformer.apply(p)
    lc.original_string = orig
    return lc
  rescue Parslet::ParseFailed => e
    return UnparseableCallNumber.new(orig)
  end
end