u

src/utils/articleDetail.js

@@ -2,6 +2,7 @@
 
 import {
   formatPriceAmount,
+  grossFromNet,
   netFromGross,
   parsePriceInput,
 } from './price';
@@ -156,3 +157,87 @@ export function formatPhotoSizeKb(fullSize) {
 export function formatPhotoDimensions(fullW, fullH) {
   return `${fullW}×${fullH}`;
 }
+
+/**
+ * Resolves the sales price (VK-Preis) and tax rate for an article.
+ * Inspects `article.prices` (matching optional `customerGroupId`, falling back to base price),
+ * top-level `article.net` / `article.price` / `article.vknetto`, and calculates gross with optional rebate.
+ *
+ * @param {object|null} article
+ * @param {object} [options]
+ * @param {number|string|null} [options.customerGroupId]
+ * @param {number|string} [options.defaultTaxRate=19]
+ * @param {number|string} [options.rebate=0]
+ * @returns {{ net: number|null, gross: number|null, taxRate: number|null }}
+ */
+export function resolveSalesPrice(article, { customerGroupId, defaultTaxRate = 19, rebate = 0 } = {}) {
+  const normTax = defaultTaxRate != null && Number.isFinite(Number(defaultTaxRate)) ? Number(defaultTaxRate) : 19;
+  if (!article) {
+    return { net: null, gross: null, taxRate: normTax };
+  }
+
+  const r = Number.isFinite(Number(rebate)) ? Number(rebate) : 0;
+
+  let matchedPrice = null;
+  if (Array.isArray(article.prices) && article.prices.length > 0) {
+    if (customerGroupId != null) {
+      matchedPrice =
+        article.prices.find(
+          (p) => String(p.customergroupId) === String(customerGroupId) && (p.minmultiplier === 1 || p.minmultiplier == null)
+        ) ||
+        article.prices.find((p) => String(p.customergroupId) === String(customerGroupId));
+    }
+    if (!matchedPrice) {
+      matchedPrice = primaryPrice(article);
+    }
+  }
+
+  let net = null;
+  let taxRate = null;
+  let gross = null;
+
+  if (matchedPrice) {
+    if (matchedPrice.net != null && Number.isFinite(Number(matchedPrice.net))) {
+      net = Number(matchedPrice.net);
+    }
+    const rawTax = matchedPrice.taxRate ?? matchedPrice.tax;
+    if (rawTax != null && Number.isFinite(Number(rawTax))) {
+      taxRate = Number(rawTax);
+    }
+    if (matchedPrice.gross != null && Number.isFinite(Number(matchedPrice.gross))) {
+      gross = Number(matchedPrice.gross);
+    } else if (net != null && taxRate != null) {
+      gross = priceBrutto(matchedPrice);
+    }
+  }
+
+  if (net == null) {
+    const rawNet = article.price ?? article.net ?? article.vknetto;
+    if (rawNet != null && Number.isFinite(Number(rawNet))) {
+      net = Number(rawNet);
+    }
+  }
+
+  if (taxRate == null) {
+    const rawTax = article.taxRate ?? article.taxrate ?? article.tax;
+    taxRate = rawTax != null && Number.isFinite(Number(rawTax)) ? Number(rawTax) : normTax;
+  }
+
+  if (gross == null && article.gross != null && Number.isFinite(Number(article.gross))) {
+    gross = Number(article.gross);
+  }
+
+  if (net == null && gross != null && taxRate != null) {
+    net = netFromGross(gross, taxRate, 0);
+  }
+
+  if (net != null && taxRate != null) {
+    if (r !== 0) {
+      gross = grossFromNet(net, taxRate, r);
+    } else if (gross == null) {
+      gross = Math.round((net * (1 + taxRate / 100) + Number.EPSILON) * 100) / 100;
+    }
+  }
+
+  return { net, gross, taxRate };
+}