Bill change should be working

Reduce quantity should be working.

bookie/src/app/sales/bills/bills.component.html

@@ -94,7 +94,7 @@
           <button
             mat-icon-button
             (click)="quantity(row)"
-            [disabled]="row.isPrinted"
+            [disabled]="rowQuantityDisabled(row)"
             *ngIf="!row.isKot"
           >
             {{ row.quantity }}

bookie/src/app/sales/bills/bills.component.ts

@@ -106,12 +106,24 @@ export class BillsComponent implements OnInit {
       if (!result) {
         return;
       }
-      this.bs.quantity(item, result as number);
+      if (!item.isPrinted) {
+        this.bs.quantity(item, result as number);
+      } else {
+        const quantity = result as number;
+        const product = {
+          ...item.product,
+          hasHappyHour: item.isHappyHour,
+          tax: item.tax,
+          price: item.price,
+        };
+        this.bs.addProduct(product, quantity, item.discount);
+      }
     });
   }
 
   subtractOne(item: any): void {
-    this.bs.subtractOne(item);
+    const canEdit = this.auth.user.perms.indexOf('edit-printed-product') !== -1;
+    this.bs.subtractOne(item, canEdit);
   }
 
   removeItem(item: any): void {
@@ -171,4 +183,17 @@ export class BillsComponent implements OnInit {
         },
       );
   }
+
+  rowQuantityDisabled(row: any) {
+    if (!row.isPrinted) {
+      return false;
+    }
+    if (this.bs.bill.isVoid) {
+      return true;
+    }
+    if (this.auth.user.perms.indexOf('edit-printed-product') === -1) {
+      return true;
+    }
+    return false;
+  }
 }