first commit

app/utils/validation/validateSupplier.util.js

@@ -0,0 +1,72 @@
+/**
+ * Copyright (c) 2026 Niolla
+ * All rights reserved.
+ *
+ * This source code is proprietary and confidential.
+ * Unauthorized copying, modification, distribution, or use
+ * of this file, via any medium, is strictly prohibited.
+ */
+
+// app/utils/validation/validateSupplier.util.js
+
+
+const db = require("../../models");
+const Supplier = db.Vendor;
+
+const extractCellValue = (value) => {
+  if (value && typeof value === "object") {
+    return value.text || value.result || "";
+  }
+  return value?.toString().trim() || "";
+};
+
+const validateSupplierColumn = async (worksheet, columns) => {
+  const supplierIdCol =
+    columns.findIndex((col) => col.column_name === "supplier_id") + 1;
+
+  if (!supplierIdCol) return;
+
+  const supplierIds = new Set();
+  const errors = [];
+
+  // 🔹 Extract values (ONLY collect non-empty)
+  for (let i = 2; i <= worksheet.rowCount; i++) {
+    let value = extractCellValue(
+      worksheet.getRow(i).getCell(supplierIdCol).value
+    );
+
+    if (value) {
+      supplierIds.add(value);
+    }
+  }
+
+  if (supplierIds.size === 0) return [];
+
+  // 🔹 Batch DB validation
+  const suppliers = await Supplier.findAll({
+    where: {
+      vendor_id: [...supplierIds],
+    },
+  });
+
+  const validIds = new Set(suppliers.map((s) => s.vendor_id));
+
+  // 🔹 Validate ONLY non-empty values
+  for (let i = 2; i <= worksheet.rowCount; i++) {
+    let value = extractCellValue(
+      worksheet.getRow(i).getCell(supplierIdCol).value
+    );
+
+    if (value && !validIds.has(value)) {
+      errors.push({
+        row: i,
+        column: "supplier_id",
+        message: `Invalid supplier ID: ${value}`,
+      });
+    }
+  }
+
+  return errors;
+};
+
+module.exports = { validateSupplierColumn };