chore: complete the the invoice module - not tested

src/modules/invoices/entities/invoice.entity.ts

@@ -1,7 +1,10 @@
-import { Column, Entity, ManyToOne } from "typeorm";
+// eslint-disable-next-line import/no-named-as-default
+import Decimal from "decimal.js";
+import { Column, Entity, ManyToOne, OneToMany } from "typeorm";
 
+import { InvoiceItem } from "./invoice-item.entity";
 import { BaseEntity } from "../../../common/entities/base.entity";
-import { SubscriptionPlan } from "../../subscriptions/entities/subscription.entity";
+import { DecimalTransformer } from "../../../common/transformers/decimal.transformer";
 import { User } from "../../users/entities/user.entity";
 import { InvoiceStatus } from "../enums/invoice-status.enum";
 
@@ -10,15 +13,25 @@ export class Invoice extends BaseEntity {
   @ManyToOne(() => User, (user) => user.invoices, { nullable: true, onDelete: "RESTRICT" })
   user: User;
 
-  @ManyToOne(() => SubscriptionPlan, { nullable: true, onDelete: "SET NULL" })
-  subscriptionPlan?: SubscriptionPlan;
-
-  @Column({ type: "decimal", precision: 10, scale: 2, nullable: false })
-  amount: number;
+  @Column({ type: "decimal", precision: 16, scale: 2, nullable: false, transformer: new DecimalTransformer() })
+  totalPrice: Decimal;
 
   @Column({ type: "enum", enum: InvoiceStatus, default: InvoiceStatus.PENDING })
   status: InvoiceStatus;
 
+  @Column({ type: "timestamp", nullable: false })
+  dueDate: Date;
+
   @Column({ type: "timestamp", nullable: true })
-  paidAt?: Date;
+  paidAt: Date | null;
+
+  @Column({ type: "int", default: 0 })
+  tax: number;
+
+  @OneToMany(() => InvoiceItem, (invoiceItem) => invoiceItem.invoice, { cascade: true })
+  items: InvoiceItem[];
+
+  get isOverdue(): boolean {
+    return this.status === InvoiceStatus.PENDING && new Date() > this.dueDate;
+  }
 }