Customer discount with prefill discount in sales.

bookie/src/app/core/customer-discount.ts

@@ -0,0 +1,12 @@
+export class CustomerDiscount {
+  id: string;
+  name: string;
+  discount: number;
+
+  public constructor(init?: Partial<CustomerDiscount>) {
+    this.id = '';
+    this.name = '';
+    this.discount = 0;
+    Object.assign(this, init);
+  }
+}

bookie/src/app/core/customer.ts

@@ -1,14 +1,18 @@
+import { CustomerDiscount } from './customer-discount';
+
 export class Customer {
   id: string;
   name: string;
   phone: string;
   address: string;
+  discounts: CustomerDiscount[];
 
   public constructor(init?: Partial<Customer>) {
     this.id = '';
     this.name = '';
     this.phone = '';
     this.address = '';
+    this.discounts = [];
     Object.assign(this, init);
   }
 }