fix: refactoring invoice calc cost service.

server/src/subscribers/SaleInvoices/SyncCustomersBalance.ts

@@ -0,0 +1,82 @@
+import { Container } from 'typedi';
+import { On, EventSubscriber } from 'event-dispatch';
+import events from 'subscribers/events';
+import TenancyService from 'services/Tenancy/TenancyService';
+
+@EventSubscriber()
+export default class SaleInvoiceSubscriber {
+  logger: any;
+  tenancy: TenancyService;
+
+  /**
+   * Constructor method.
+   */
+  constructor() {
+    this.logger = Container.get('logger');
+    this.tenancy = Container.get(TenancyService);
+  }
+
+  /**
+   * Handles customer balance increment once sale invoice created.
+   */
+  @On(events.saleInvoice.onCreated)
+  public async handleCustomerBalanceIncrement({
+    tenantId,
+    saleInvoice,
+    saleInvoiceId,
+  }) {
+    const { customerRepository } = this.tenancy.repositories(tenantId);
+
+    this.logger.info('[sale_invoice] trying to increment customer balance.', {
+      tenantId,
+    });
+    await customerRepository.changeBalance(
+      saleInvoice.customerId,
+      saleInvoice.balance
+    );
+  }
+
+  /**
+   * Handles customer balance diff balnace change once sale invoice edited.
+   */
+  @On(events.saleInvoice.onEdited)
+  public async onSaleInvoiceEdited({
+    tenantId,
+    saleInvoice,
+    oldSaleInvoice,
+    saleInvoiceId,
+  }) {
+    const { customerRepository } = this.tenancy.repositories(tenantId);
+
+    this.logger.info('[sale_invoice] trying to change diff customer balance.', {
+      tenantId,
+    });
+    await customerRepository.changeDiffBalance(
+      saleInvoice.customerId,
+      saleInvoice.balance,
+      oldSaleInvoice.balance,
+      oldSaleInvoice.customerId
+    );
+  }
+ 
+
+  /**
+   * Handles customer balance decrement once sale invoice deleted.
+   */
+  @On(events.saleInvoice.onDeleted)
+  public async handleCustomerBalanceDecrement({
+    tenantId,
+    saleInvoiceId,
+    oldSaleInvoice,
+  }) {
+    const { customerRepository } = this.tenancy.repositories(tenantId);
+
+    this.logger.info('[sale_invoice] trying to decrement customer balance.', {
+      tenantId,
+    });
+    await customerRepository.changeBalance(
+      oldSaleInvoice.customerId,
+      oldSaleInvoice.balance * -1
+    );
+  }
+}