Customer discount with prefill discount in sales.

bookie/src/app/sales/discount/discount-item.ts

@@ -0,0 +1,16 @@
+export class DiscountItem {
+  id: string;
+  name: string;
+  discount: number;
+  discountLimit: number;
+  customerDiscount: number;
+
+  public constructor(init?: Partial<DiscountItem>) {
+    this.id = '';
+    this.name = '';
+    this.discount = 0;
+    this.discountLimit = 0;
+    this.customerDiscount = 0;
+    Object.assign(this, init);
+  }
+}