feat(nestjs): migrate to NestJS

packages/server/src/modules/Customers/queries/CustomerTransformer.ts

@@ -0,0 +1,38 @@
+import { ContactTransfromer } from "../../Contacts/Contact.transformer";
+
+export class CustomerTransfromer extends ContactTransfromer {
+  /**
+   * Include these attributes to expense object.
+   * @returns {Array}
+   */
+  public includeAttributes = (): string[] => {
+    return [
+      'formattedBalance',
+      'formattedOpeningBalance',
+      'formattedOpeningBalanceAt',
+      'customerType',
+      'formattedCustomerType',
+    ];
+  };
+
+  /**
+   * Retrieve customer type.
+   * @returns {string}
+   */
+  protected customerType = (customer): string => {
+    return customer.contactType;
+  };
+
+  /**
+   * Retrieve the formatted customer type.
+   * @param customer
+   * @returns {string}
+   */
+  protected formattedCustomerType = (customer): string => {
+    const keywords = {
+      individual: 'customer.type.individual',
+      business: 'customer.type.business',
+    };
+    return this.context.i18n.t(keywords[customer.contactType] || '');
+  };
+}

packages/server/src/modules/Customers/queries/GetCustomer.service.ts

@@ -0,0 +1,30 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { CustomerTransfromer } from './CustomerTransformer';
+import { TransformerInjectable } from '@/modules/Transformer/TransformerInjectable.service';
+import { Customer } from '../models/Customer';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class GetCustomerService {
+  constructor(
+    private transformer: TransformerInjectable,
+
+    @Inject(Customer.name)
+    private customerModel: TenantModelProxy<typeof Customer>,
+  ) {}
+
+  /**
+   * Retrieve the given customer details.
+   * @param {number} customerId
+   */
+  public async getCustomer(customerId: number) {
+    // Retrieve the customer model or throw not found error.
+    const customer = await this.customerModel()
+      .query()
+      .findById(customerId)
+      .throwIfNotFound();
+
+    // Retrieves the transformered customers.
+    return this.transformer.transform(customer, new CustomerTransfromer());
+  }
+}

packages/server/src/modules/Customers/queries/GetCustomers.service.ts

@@ -0,0 +1,65 @@
+import { DynamicListService } from '@/modules/DynamicListing/DynamicList.service';
+import { TransformerInjectable } from '@/modules/Transformer/TransformerInjectable.service';
+import { Inject, Injectable } from '@nestjs/common';
+import * as R from 'ramda';
+import { Customer } from '../models/Customer';
+import { CustomerTransfromer } from './CustomerTransformer';
+import {
+  GetCustomersResponse,
+  ICustomersFilter,
+} from '../types/Customers.types';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+
+@Injectable()
+export class GetCustomers {
+  constructor(
+    private dynamicListService: DynamicListService,
+    private transformer: TransformerInjectable,
+
+    @Inject(Customer.name)
+    private customerModel: TenantModelProxy<typeof Customer>,
+  ) {}
+
+  /**
+   * Parses customers list filter DTO.
+   * @param filterDTO -
+   */
+  private parseCustomersListFilterDTO(filterDTO) {
+    return R.compose(this.dynamicListService.parseStringifiedFilter)(filterDTO);
+  }
+
+  /**
+   * Retrieve customers paginated list.
+   * @param {ICustomersFilter} filter - Cusotmers filter.
+   * @returns {Promise<GetCustomersResponse>}
+   */
+  public async getCustomersList(
+    filterDTO: ICustomersFilter,
+  ): Promise<GetCustomersResponse> {
+    // Parses customers list filter DTO.
+    const filter = this.parseCustomersListFilterDTO(filterDTO);
+
+    const dynamicList = await this.dynamicListService.dynamicList(
+      this.customerModel(),
+      filter,
+    );
+    const { results, pagination } = await this.customerModel()
+      .query()
+      .onBuild((builder) => {
+        dynamicList.buildQuery()(builder);
+        builder.modify('inactiveMode', filter.inactiveMode);
+      })
+      .pagination(filter.page - 1, filter.pageSize);
+
+    // Retrieves the transformed customers.
+    const customers = await this.transformer.transform(
+      results,
+      new CustomerTransfromer(),
+    );
+    return {
+      customers,
+      pagination,
+      filterMeta: dynamicList.getResponseMeta(),
+    };
+  }
+}