refactoring: bills service.

refactoring: bills payments made service.

server/src/subscribers/bills.ts

@@ -0,0 +1,83 @@
+import { Container, Inject, Service } from 'typedi';
+import { EventSubscriber, On } from 'event-dispatch';
+import events from 'subscribers/events';
+import TenancyService from 'services/Tenancy/TenancyService';
+import BillsService from 'services/Purchases/Bills';
+import JournalPosterService from 'services/Sales/JournalPosterService';
+import VendorRepository from 'repositories/VendorRepository';
+
+@EventSubscriber()
+export default class BillSubscriber {
+  tenancy: TenancyService;
+  billsService: BillsService;
+  logger: any;
+  journalPosterService: JournalPosterService;
+
+  constructor() {
+    this.tenancy = Container.get(TenancyService);
+    this.billsService = Container.get(BillsService);
+    this.logger = Container.get('logger');
+
+    this.journalPosterService = Container.get(JournalPosterService);
+  }
+
+  /**
+   * Handles vendor balance increment once bill created.
+   */
+  @On(events.bills.onCreated)
+  async handleVendorBalanceIncrement({ tenantId, billId, bill }) {
+    const { vendorRepository } = this.tenancy.repositories(tenantId);
+
+    // Increments vendor balance.
+    this.logger.info('[bill] trying to increment vendor balance.', { tenantId, billId });
+    await vendorRepository.changeBalance(bill.vendorId, bill.amount);
+  }
+
+  /**
+   * Handles writing journal entries once bill created.
+   */
+  @On(events.bills.onCreated)
+  @On(events.bills.onEdited)
+  async handlerWriteJournalEntries({ tenantId, billId, bill }) {
+    // Writes the journal entries for the given bill transaction.
+    this.logger.info('[bill] writing bill journal entries.', { tenantId });
+    await this.billsService.recordJournalTransactions(tenantId, bill);
+  }
+
+  /**
+   * Handles vendor balance decrement once bill deleted.
+   */
+  @On(events.bills.onDeleted)
+  async handleVendorBalanceDecrement({ tenantId, billId, oldBill }) {
+    const { vendorRepository } = this.tenancy.repositories(tenantId);
+
+    // Decrements vendor balance.
+    this.logger.info('[bill] trying to decrement vendor balance.', { tenantId, billId });
+    await vendorRepository.changeBalance(oldBill.vendorId, oldBill.amount * -1);
+  }
+
+  /**
+   * Handles revert journal entries on bill deleted.
+   */
+  @On(events.bills.onDeleted)
+  async handlerDeleteJournalEntries({ tenantId, billId }) {
+    // Delete associated bill journal transactions.
+    this.logger.info('[bill] trying to delete journal entries.', { tenantId, billId });
+    await this.journalPosterService.revertJournalTransactions(tenantId, billId, 'Bill');
+  }
+
+
+  @On(events.bills.onEdited)
+  async handleCustomerBalanceDiffChange({ tenantId, billId, oldBill, bill }) {
+    const { vendorRepository } = this.tenancy.repositories(tenantId);
+
+    // Changes the diff vendor balance between old and new amount.
+    this.logger.info('[bill[ change vendor the different balance.', { tenantId, billId });
+    await vendorRepository.changeDiffBalance(
+      bill.vendorId,
+      oldBill.vendorId,
+      bill.amount,
+      oldBill.amount,
+    );
+  }
+}