class Shelvit

Generates normalized shelf keys from call numbers, using the Lcsort gem.

Constants

LOWER_MAP
VERSION

Public Class Methods

normalize(call_number) click to toggle source 
# File lib/shelvit.rb, line 9
def self.normalize(call_number)
  return if call_number.nil?

  Lcsort.normalize(call_number) || Lcsort.normalize(cleaned(call_number))
end

Private Class Methods

cleaned(call_number) click to toggle source

@note If Lcsort can’t properly normalize the call number, we “clean” it up by translating unsortable characters into sortable ones:

  1. Lower-case letters are translated into numbers 00 through 25. Ex. PZ7.H56774Fz becomes PZ7.H56774F25

  2. Colons are replaced with periods

  3. LC numbers that have no number after their letter classification have a ‘0’ added. Ex, KKP.B634 becomes KKP0.B634

# File lib/shelvit.rb, line 22
def self.cleaned(call_number)
  call_number
    .gsub(/([a-z])/, LOWER_MAP)
    .gsub(/:/, '.')
    .gsub(/(^[A-Z]{1,3})\.([A-Z])/, '\10.\2')
end