Class: Item::AmazonFnskuBarcode

Inherits:
BaseService show all
Defined in:
app/services/item/amazon_fnsku_barcode.rb

Overview

This will generate a FNSKU Barcode
30336 compatible Dymo labels (2.125" x 1") - This is paper size 'w72h154' in PrintNode
To make this work you will need a Dymo labelwriter 400 series with the right label and the PrintNode server running

  1. Go to localhost:631, manage printers, select the dymo
  2. Select "Set Default options"
  3. Select Media Size 30336, Continuous paper: false, output resolution 300x600, print quality barcode and graphics, media source auto
  4. In print node options, next to the printer, page width set to 1.0, page height set to 2.13

Defined Under Namespace

Classes: Result

Instance Attribute Summary

Attributes inherited from BaseService

#options

Instance Method Summary collapse

Methods inherited from BaseService

#initialize, #log_debug, #log_error, #log_info, #log_warning, #logger, #tagged_logger

Constructor Details

This class inherits a constructor from BaseService

Instance Method Details

#process(fnsku, file_path: nil, output_format: nil, xdim: 2, height: 50) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'app/services/item/amazon_fnsku_barcode.rb', line 16

def process(fnsku, file_path: nil, output_format: nil, xdim: 2, height: 50)
  require 'zint'

  output_format ||= :png

  return Result.new(success: false, message: "Unsupported format: #{output_format}, only png supported at this time") unless output_format == :png
  return Result.new(success: false, message: "Invalid FNSKU #{AmazonFnskuValidator::MESSAGE}") unless AmazonFnskuValidator.valid?(fnsku)

  barcode = Zint::Barcode.new(value: fnsku, symbology: Zint::Constants::Symbologies::BARCODE_CODE128)
  barcode.scale = xdim # width of each bar, in pixels
  barcode.height = (height.to_f / xdim).round # zint counts height in bar-width units
  barcode.show_hrt = 0 # barby rendered bars only; keep it that way

  barcode_output = barcode.to_memory_file(extension: '.png')

  return Result.new(success: true, output: barcode_output, fnsku:, output_format:, identifier_type: 'FNSKU', identifier_formatted: fnsku) unless file_path

  File.open(file_path, 'wb') do |f|
    f.write barcode_output
    f.flush
    f.fsync
  end
  Result.new(success: true, output: file_path, fnsku:, output_format:)
end