Class: Barby::Bookland

Bookland barcodes are EAN-13 barcodes with number system 978 (hence "Bookland"). The data they encode is an ISBN with its check digit removed. This is a convenience class that takes an ISBN no instead of "pure" EAN-13 data.

Methods

data isbn_only new

Constants

BOOKLAND_NUMBER_SYSTEM = '978'

Attributes

isbn [RW]

Public Class methods

new(isbn)

[Source]

    # File lib/barby/barcode/bookland.rb, line 15
15:     def initialize(isbn)
16:       self.isbn = isbn
17:       raise ArgumentError, 'data not valid' unless valid?
18:     end

Public Instance methods

data()

[Source]

    # File lib/barby/barcode/bookland.rb, line 20
20:     def data
21:       BOOKLAND_NUMBER_SYSTEM+isbn_only
22:     end

isbn_only()

Removes any non-digit characters, number system and check digit from ISBN, so "978-82-92526-14-9" would result in "829252614"

[Source]

    # File lib/barby/barcode/bookland.rb, line 26
26:     def isbn_only
27:       s = isbn.gsub(/[^0-9]/, '')
28:       if s.size > 10#Includes number system
29:         s[3,9]
30:       else#No number system, may include check digit
31:         s[0,9]
32:       end
33:     end