refactor: migrate credit note and vendor credit services to nestjs

packages/server-nest/src/modules/CreditNotes/commands/CreateCreditNote.service.ts

@@ -0,0 +1,83 @@
+import { Knex } from 'knex';
+import { Injectable } from '@nestjs/common';
+import {
+  ICreditNoteCreatedPayload,
+  ICreditNoteCreatingPayload,
+  ICreditNoteNewDTO,
+} from '../types/CreditNotes.types';
+import { CreditNote } from '../models/CreditNote';
+import { Contact } from '../../Contacts/models/Contact';
+import { CommandCreditNoteDTOTransform } from './CommandCreditNoteDTOTransform.service';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+import { ItemsEntriesService } from '@/modules/Items/ItemsEntries.service';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { events } from '@/common/events/events';
+
+@Injectable()
+export class CreateCreditNoteService {
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly itemsEntriesService: ItemsEntriesService,
+    private readonly eventPublisher: EventEmitter2,
+    private readonly creditNoteModel: typeof CreditNote,
+    private readonly contactModel: typeof Contact,
+    private readonly commandCreditNoteDTOTransform: CommandCreditNoteDTOTransform,
+  ) {}
+
+  /**
+   * Creates a new credit note.
+   * @param creditNoteDTO
+   */
+  public creditCreditNote = async (
+    creditNoteDTO: ICreditNoteNewDTO,
+    trx?: Knex.Transaction,
+  ) => {
+    // Triggers `onCreditNoteCreate` event.
+    await this.eventPublisher.emitAsync(events.creditNote.onCreate, {
+      creditNoteDTO,
+    });
+    // Validate customer existance.
+    const customer = await this.contactModel
+      .query()
+      .modify('customer')
+      .findById(creditNoteDTO.customerId)
+      .throwIfNotFound();
+
+    // Validate items ids existance.
+    await this.itemsEntriesService.validateItemsIdsExistance(
+      creditNoteDTO.entries,
+    );
+    // Validate items should be sellable items.
+    await this.itemsEntriesService.validateNonSellableEntriesItems(
+      creditNoteDTO.entries,
+    );
+    // Transformes the given DTO to storage layer data.
+    const creditNoteModel =
+      await this.commandCreditNoteDTOTransform.transformCreateEditDTOToModel(
+        creditNoteDTO,
+        customer.currencyCode,
+      );
+    // Creates a new credit card transactions under unit-of-work envirement.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Triggers `onCreditNoteCreating` event.
+      await this.eventPublisher.emitAsync(events.creditNote.onCreating, {
+        creditNoteDTO,
+        trx,
+      } as ICreditNoteCreatingPayload);
+
+      // Upsert the credit note graph.
+      const creditNote = await this.creditNoteModel.query(trx).upsertGraph({
+        ...creditNoteModel,
+      });
+      // Triggers `onCreditNoteCreated` event.
+      await this.eventPublisher.emitAsync(events.creditNote.onCreated, {
+        creditNoteDTO,
+        creditNote,
+        creditNoteId: creditNote.id,
+        trx,
+      } as ICreditNoteCreatedPayload);
+
+      return creditNote;
+    }, trx);
+  };
+}