BarcodeGenerator

Online documentation | Hex.pm

BarcodeGenerator generates a list of barcodes from a given start and end barcode.

This library allows you to generate GTIN barcodes by passing it the first and last barcode of a range.

Examples

Validating

BarcodeGenerator allows simple check-digit validation for GTIN barcodes, both in binary and numeric format:

BarcodeGenerator.valid?("6291041500206")
# true

BarcodeGenerator.valid?(6291041500206)
# true

BarcodeGenerator.valid?("6291041500200")
# false

BarcodeGenerator.valid?(6291041500200)
# false

Generating

BarcodeGenerator can generate barcodes in three different ways:

Plain list

BarcodeGenerator.generate/2 generates barcodes in a simple list format.

BarcodeGenerator.generate(6_291_041_500_200, 6_291_041_500_299)

Stream

BarcodeGenerator.generate_stream/2 returns a Stream that can be enumerated. Barcodes are generated as the stream is consumed, reducing memory footprint.

stream = BarcodeGenerator.generate_stream(6_291_041_500_200, 6_291_041_500_299)
barcodes = Enum.to_list(stream)

Flow (optional dependency)

BarcodeGenerator.generate_flow/3 returns a Flow, but requires that flow is present as dependency. Generating barcodes using Flow is heavily optimized to use all available resources to generate as quickly as possible.

BarcodeGenerator.generate_flow/3 accepts an optional third argument, opts, which is passed to Flow.from_enumerable/2, and defaults to max_demand: 1000.

# Assuming `{:flow, "~> 1.0"}` is in mix.exs
flow = BarcodeGenerator.generate_flow(6_291_041_500_200, 6_291_041_500_299)
barcodes = Enum.to_list(flow)

Installation

Add barcode_generator to your list of dependencies in mix.exs:

def deps do
  [{:barcode_generator, "~> 1.1.0"}]
end

License

This library is MIT licensed. See the LICENSE file in this repository for details.