HS code validation added

app/controllers/establishment.controller.js

@@ -977,13 +977,28 @@ exports.establishmentBulkUpload = async (req, res) => {
       emirateMap[e.name.trim().toLowerCase()] = e.id;
     });
 
-    const products = await Product.findAll({ attributes: ["id", "hs_code"] });
-    const productMap = {};
-    products.forEach(p => {
-      const normalized = p.hs_code.replace(/[^0-9]/g, "").replace(/^0+/, "");
-      productMap[normalized] = p.id;
-    });
+        function normalizeHS(val) {
+      if (!val) return "";
 
+      return val
+        .toString()
+        .normalize("NFKD")           
+        .replace(/[^\d]/g, "")       
+        .trim();
+    }
+
+    const products = await Product.findAll({ attributes: ["id", "hs_code"] });
+
+    const productMap = {};
+
+      products.forEach(p => {
+        const cleaned = normalizeHS(p.hs_code);
+
+        // Only store valid HS codes 1–10 digits
+        if (cleaned.length >= 1 && cleaned.length <= 10) {
+          productMap[cleaned] = p.id;
+        }
+      });
     const existingEsts = await Establishment.findAll({
       attributes: ["establishment_code", "factory_name", "establishment_contact_email"]
     });
@@ -1121,22 +1136,26 @@ exports.establishmentBulkUpload = async (req, res) => {
       // DB-level HS Code validation
       const invalid = [];
 
-      for (const raw of hsRaw) {
-        const cleaned = raw.replace(/\D/g, ""); // remove non-numeric fast
+        for (const raw of hsRaw) {
+          const cleaned = normalizeHS(raw);
 
-        // Check 10-digit requirement + DB existence
-        if (cleaned.length !== 10 || !productMap[cleaned]) {
-          invalid.push(raw); // always push RAW value
+          if (cleaned.length < 1 || cleaned.length > 10) {
+            invalid.push(raw);
+            continue;
+          }
+
+          if (!productMap[cleaned]) {
+            invalid.push(raw);
+          }
         }
-      }
 
-      if (invalid.length > 0) {
-        errors.push({
-          row: rowNum,
-          error: `HS Code not found in database: ${invalid.join(", ")}`
-        });
-        continue;
-      }
+        if (invalid.length > 0) {
+          errors.push({
+            row: rowNum,
+            error: `HS Code not found in database: ${invalid.join(", ")}`
+          });
+          continue;
+        }
 
       prepared.push({
         est,