add vat to tax calculations

src/features/order/orderSlice.ts

@@ -662,15 +662,26 @@ export const {
 } = orderSlice.actions;
 
 // Tax calculation helper functions
-const calculateTaxAmount = (amount: number, tax: Tax): number => {
+const calculateTaxAmount = (
+  state: RootState,
+  amount: number,
+  tax: Tax,
+): number => {
   const percentage = parseFloat(tax.percentage);
-  return (percentage * amount) / 100;
+  return (((state.order.restaurant?.vat || 0) + percentage) * amount) / 100;
 };
 
-const calculateTotalTax = (subtotal: number, taxes: Tax[]): number => {
+const calculateTotalTax = (
+  state: RootState,
+  subtotal: number,
+  taxes: Tax[],
+): number => {
   return taxes
     .filter((tax) => tax.is_active === 1)
-    .reduce((total, tax) => total + calculateTaxAmount(subtotal, tax), 0);
+    .reduce(
+      (total, tax) => total + calculateTaxAmount(state, subtotal, tax),
+      0,
+    );
 };
 
 // Selectors
@@ -742,7 +753,7 @@ export const selectTaxes = (state: RootState) => state.order.restaurant.taxes;
 export const selectTaxAmount = (state: RootState) => {
   const subtotal = selectCartTotal(state) - selectDiscountTotal(state);
   const taxes = selectTaxes(state);
-  return calculateTotalTax(subtotal, taxes || []);
+  return calculateTotalTax(state, subtotal, taxes || []);
 };
 
 export const selectGrandTotal = (state: RootState) => {