feat: licenses administration basic authentication.

feat: accounts slug.
feat: duplicate accounts_balance table and merge balance with accounts table.
feat: refactoring customers and vendors.
feat: system user soft deleting.
feat: preventing build tenant database without any subscription.
feat: remove 'password' property from 'req.user' object.
feat: refactoring JournalPoster class.
feat: delete duplicated directories and files.

server/src/repositories/CustomerRepository.ts

@@ -0,0 +1,71 @@
+import TenantRepository from "./TenantRepository";
+
+export default class CustomerRepository extends TenantRepository {
+  models: any;
+  cache: any;
+
+  /**
+   * Constructor method.
+   * @param {number} tenantId 
+   */
+  constructor(tenantId: number) {
+    super(tenantId);
+
+    this.models = this.tenancy.models(tenantId);
+    this.cache = this.tenancy.cache(tenantId);
+  }
+
+  /**
+   * Retrieve customer details of the given id.
+   * @param {number} customerId -
+   */
+  getById(customerId: number) {
+    const { Contact } = this.models;
+
+    return this.cache.get(`customers.id.${customerId}`, () => {
+      return Contact.query().modifier('customer').findById(customerId);
+    });
+  }
+
+  /**
+   * Detarmines the given customer exists.
+   * @param {number} customerId 
+   * @returns {boolean}
+   */
+  isExists(customerId: number) {
+    return !!this.getById(customerId);
+  }
+
+  /**
+   * Retrieve the sales invoices that assocaited to the given customer.
+   * @param {number} customerId 
+   */
+  getSalesInvoices(customerId: number) {
+    const { SaleInvoice } = this.models;
+
+    return this.cache.get(`customers.invoices.${customerId}`, () => {
+      return SaleInvoice.query().where('customer_id', customerId);
+    });
+  }
+
+  /**
+   * Retrieve customers details of the given ids.
+   * @param  {number[]} customersIds - Customers ids.
+   * @return {IContact[]}
+   */
+  customers(customersIds: number[]) {
+    const { Contact } = this.models;
+    return Contact.query().modifier('customer').whereIn('id', customersIds);
+  }
+  
+  /**
+   * Retrieve customers of the given ids with associated sales invoices.
+   * @param {number[]} customersIds - Customers ids.
+   */
+  customersWithSalesInvoices(customersIds: number[]) {
+    const { Contact } = this.models;
+    return Contact.query().modify('customer')
+      .whereIn('id', customersIds)
+      .withGraphFetched('salesInvoices');
+  }
+}