refactor: split the services to multiple service classes (#202)

packages/server/src/services/Sales/Invoices/SaleInvoiceWriteoffSubscriber.ts

@@ -0,0 +1,58 @@
+import { Inject, Service } from 'typedi';
+import events from '@/subscribers/events';
+import {
+  ISaleInvoiceWriteoffCreatePayload,
+  ISaleInvoiceWrittenOffCanceledPayload,
+} from '@/interfaces';
+import { SaleInvoiceWriteoffGLStorage } from './SaleInvoiceWriteoffGLStorage';
+
+@Service()
+export default class SaleInvoiceWriteoffSubscriber {
+  @Inject()
+  writeGLStorage: SaleInvoiceWriteoffGLStorage;
+
+  /**
+   * Attaches events.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.saleInvoice.onWrittenoff,
+      this.writeJournalEntriesOnceWriteoffCreate
+    );
+    bus.subscribe(
+      events.saleInvoice.onWrittenoffCanceled,
+      this.revertJournalEntriesOnce
+    );
+  }
+  /**
+   * Write the written-off sale invoice journal entries.
+   * @param {ISaleInvoiceWriteoffCreatePayload}
+   */
+  private writeJournalEntriesOnceWriteoffCreate = async ({
+    tenantId,
+    saleInvoice,
+    trx,
+  }: ISaleInvoiceWriteoffCreatePayload) => {
+    await this.writeGLStorage.writeInvoiceWriteoffEntries(
+      tenantId,
+      saleInvoice.id,
+      trx
+    );
+  };
+
+  /**
+   * Reverts the written-of sale invoice jounral entries.
+   * @param {ISaleInvoiceWrittenOffCanceledPayload}
+   */
+  private revertJournalEntriesOnce = async ({
+    tenantId,
+    saleInvoice,
+    trx,
+  }: ISaleInvoiceWrittenOffCanceledPayload) => {
+    await this.writeGLStorage.revertInvoiceWriteoffEntries(
+      tenantId,
+      saleInvoice.id,
+      trx
+    );
+  };
+}