Alexander
c73363e93d
Coop Supercard uses GS1 Data Matrix — the payload contains FNC1 separators between fields, not literal 0x1D bytes. Enable bwip-js parsefnc so ^FNC1 placeholders in the env value produce genuine FNC1 codewords (codeword 232), matching the physical card and letting checkout scanners parse the GS1 element string.
63 lines
2.0 KiB
TypeScript
63 lines
2.0 KiB
TypeScript
/**
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* Build-time generation of loyalty-card barcode SVGs.
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*
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* Reads card numbers from env vars and writes static/shopping/supercard.svg
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* + static/shopping/cumulus.svg. Skips cards whose env var is unset so the
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* site still builds in environments without secrets.
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*
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* SHOPPING_COOP_SUPERCARD_NUMBER → Data Matrix (Coop Supercard)
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* SHOPPING_MIGROS_CUMULUS_NUMBER → Code 128 (Migros Cumulus)
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*
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* Run: pnpm exec vite-node scripts/generate-loyalty-cards.ts
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*/
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import { mkdirSync, writeFileSync, rmSync } from 'node:fs';
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import { dirname, resolve } from 'node:path';
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import { fileURLToPath } from 'node:url';
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import { toSVG } from 'bwip-js/node';
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const HERE = dirname(fileURLToPath(import.meta.url));
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const OUT_DIR = resolve(HERE, '..', 'static', 'shopping');
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type CardSpec = {
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envVar: string;
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filename: string;
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bcid: 'datamatrix' | 'code128';
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scale: number;
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parsefnc?: boolean;
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};
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const cards: CardSpec[] = [
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// Coop Supercard uses GS1 Data Matrix with FNC1 separators between fields.
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// Put ^FNC1 in the env value wherever the real symbol has a separator
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// (dmtxread -G prints them as 0x1D); parsefnc: true turns each ^FNC1 into
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// a genuine FNC1 codeword so the regenerated code matches the card.
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{ envVar: 'SHOPPING_COOP_SUPERCARD_NUMBER', filename: 'supercard.svg', bcid: 'datamatrix', scale: 6, parsefnc: true },
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{ envVar: 'SHOPPING_MIGROS_CUMULUS_NUMBER', filename: 'cumulus.svg', bcid: 'code128', scale: 3 }
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];
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mkdirSync(OUT_DIR, { recursive: true });
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for (const card of cards) {
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const value = process.env[card.envVar]?.trim();
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const outPath = resolve(OUT_DIR, card.filename);
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if (!value) {
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try { rmSync(outPath); } catch { /* not present */ }
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console.log(`[loyalty-cards] ${card.envVar} not set — skipped ${card.filename}`);
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continue;
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}
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const svg = toSVG({
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bcid: card.bcid,
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text: value,
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scale: card.scale,
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includetext: false,
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paddingwidth: 8,
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paddingheight: 8,
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...(card.parsefnc ? { parsefnc: true } : {})
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});
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writeFileSync(outPath, svg, 'utf8');
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console.log(`[loyalty-cards] wrote ${card.filename} (${card.bcid})`);
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}
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