Barcode GS1

This module adds GS1 barcode parsing to the Barcode suite.

It registers a GS1 parser into the barcode_scanner base — through the barcode_parsers registry, without patching the base. Scanned GS1-128 barcodes, whether written with parenthesised application identifiers ((01)...(10)...) or as raw FNC1-separated data, are decoded into structured fields: GTIN (AI 01), batch/lot (10), serial (21), production/pack/best-before/ expiry dates (11/13/15/16/17), count (30/37), net weight and other measures (310n–360n), amounts payable (390n–393n), SSCC (00) and location GLNs (410/413/414).

What each application identifier means is read from Odoo's own GS1 nomenclature (barcode.nomenclature and its rules, as shipped by the standard Barcode - GS1 Nomenclature module), so a rule added or adapted in Settings applies to the scanner too. Identifiers the nomenclature does not define fall back to the ones built into this module, so an unknown AI in the middle of a barcode never cuts the rest of the scan short.

Numeric identifiers — GTIN, SSCC, GLN — are only accepted when their check digit matches, so a misread is reported instead of quietly resolving to the wrong product.

Every screen then receives the parsed data alongside the raw scan, so a single GS1 scan can identify the product and fill lot, expiry and quantity at once. Non-GS1 codes fall through to the base EAN13 parser, so the module is safe to install next to the rest of the suite.