Support pluggable barcode lookup drivers

[jpdevries]

Summary

Add a driver/adapter pattern for barcode lookup so users can choose which API powers their barcode scanner. Currently hardcoded to Open Food Facts.

Motivation

Open Food Facts is great for groceries but has gaps for non-food household items. A pluggable driver system would let users configure alternative APIs based on their needs.

Proposed drivers

• Open Food Facts (default, current) — free, open source, food-focused
• Barcode Lookup — broader product coverage (see #$NEXT)

Design

An env var like BARCODE_DRIVER=openfoodfacts selects the active driver. Each driver implements a common interface:

interface BarcodeLookupDriver {
  lookup(barcode: string): Promise<BarcodeLookupResult | null>;
}

The existing Open Food Facts logic in packages/app/pages/api/lookup-barcode.ts becomes the first driver.

References

• Current implementation: packages/app/pages/api/lookup-barcode.ts
• Open Food Facts API: https://world.openfoodfacts.org/

🤖 Generated with Claude Code