Blueprint: GTIN Barcode Support

[lasley]

GTIN is a barcode nomenclature that provides package, unit, and item references in the code + a mod10 checksum similar to EAN.

There are multiple types of GTIN - my project goal is specifically to GTIN14, but I believe I will be able to nail support for all of them because the lower ones are just zero padded. The other GTIN versions are encoded with EAN13 (GTIN13), UPC-A (GTIN12), or EAN8 (GTIN8)

Following are the high level items that need to be accomplished as part of this. It looks like we do have some logic available in base_gs1_barcode for the encoding too (GTIN14 is encoded as GS1-128).

• [ ] Base GTIN14 validation - #36
  • Also known as EAN14. Can use similar logic to the existing EAN sums - too bad they're not more abstracted so I could just use them though 😦
• [ ] GTIN* => GTIN14 conversions
• [ ] Add a package reference column on product.packaging - this will need to be used to identify the quantity multiplier
• [ ] Add company prefix model, with GS1, GS1-8, and UPC as types. M2M with vendors, allowing for relation to their company prefix codes
• [ ] GTIN14 nomenclature type
  • First digit is indicator (how many quantity of package units)
  • Twelve digits following are GS1 company prefix and item reference
  • Last digit is check digit
• [ ] GTIN12 nomenclature
  • Eleven digit UPC Company Prefix
  • Last digit is check digit
• [ ] GTIN8 nomenclature type
  • Seven digit GS1-8 company prefix
  • Last digit is check digit

More info on GTIN:

• http://www.entmerch.org/programsinitiatives/packaging-labeling-and-edi/gtin-implementation-guide.pdf
• https://www.gs1us.org/Portals/0/gs1%20us%20library/standards/gs1%20identification%20numbers/An%20Introduction%20to%20the%20Global%20Trade%20Item%20Number%20(GTIN).pdf

Please let me know if this overlaps with anything existing, or if there are already existing strategies in existence for handling of GTIN 😄

cc @t3ddftw

[pedrobaeza]

See https://github.com/OCA/product-attribute/tree/8.0/product_gtin

A logical move is to bring this module here in 9.0 and remove it from the other repository.

[lasley]

PR #36