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src/api/routes/article/shared.js

@@ -127,6 +127,24 @@ export function formatPrice(amount) {
     return CURRENCY_FORMATTER.format(Number(amount));
 }
 
+const BASEPRICE_FORMATTER = new Intl.NumberFormat('de-DE', {
+    minimumFractionDigits: 2,
+    maximumFractionDigits: 2,
+});
+
+/** Formats the price per base unit, e.g. "€ 4,05 / L". Empty when unit data or price is missing. */
+export function formatBasePrice(net, taxRate, article) {
+    const unit = article?.unit;
+    const unitamount = Number(article?.unitamount);
+    const factor = Number(unit?.basesifactor);
+    if (net == null || !unit || !(unitamount > 0) || !(factor > 0)) return '';
+    const baseAmount = unitamount * factor;
+    const perBase = (net * (1 + taxRate / 100)) / baseAmount;
+    const label = factor === 1 ? (unit.symbol || unit.basesi) : unit.basesi;
+    if (!label) return '';
+    return `€ ${BASEPRICE_FORMATTER.format(perBase)} / ${label}`;
+}
+
 export function interpolateString(str, article) {
     if (typeof str !== 'string') return str;
     const basePrice = Array.isArray(article?.prices) && article.prices.length > 0
@@ -144,6 +162,7 @@ export function interpolateString(str, article) {
 
     return str
         .replace(/\{\{name\}\}/gi, article?.name || '')
+        .replace(/\{\{baseprice\}\}/gi, formatBasePrice(net, taxRate, article))
         .replace(/\{\{price\}\}/gi, formatPrice(gross));
 }