BarcodeGeneratorService

Generates PDF barcodes for products/variants using Barby and Prawn. Lifts out cleanly - just requires barby, prawn, and variant objects with name, options_text, price, and sku.

module Spree
  class BarcodeGeneratorService
    require 'barby'
    require 'barby/barcode/code_128'
    require 'barby/barcode/ean_13'
    require 'barby/outputter/png_outputter'
    require 'prawn'
    require 'prawn/measurement_extensions'

    def append_barcode_to_pdf_for_variants_of_product(variants)
      variants.inject(empty_pdf(height: 120)) { |pdf, variant| append_barcode_to_pdf_for_variant(variant, pdf) }
    end

    def append_barcode_to_pdf_for_variant(variant, pdf = empty_pdf)
      [ variant.name, variant.options_text, (variant.price.to_s + current_symbol) ].each { |item| pdf.text(item) }

      barcode = get_barcode(variant)
      pdf.image(StringIO.new(barcode.to_png(xdim: 5)), width: 50.mm, height: 10.mm, margin: 2.mm) if barcode
      pdf.text(' ')
      pdf
    end



... (truncated -- full source via MCP)