feat: disconnect bank account

packages/server/src/services/Banking/BankAccounts/BankAccountsApplication.tsx

@@ -0,0 +1,21 @@
+import { Inject, Service } from 'typedi';
+import { DisconnectBankAccount } from './DisconnectBankAccount';
+
+@Service()
+export class BankAccountsApplication {
+  @Inject()
+  private disconnectBankAccountService: DisconnectBankAccount;
+
+  /**
+   * Disconnects the given bank account.
+   * @param {number} tenantId
+   * @param {number} bankAccountId
+   * @returns {Promise<void>}
+   */
+  async disconnectBankAccount(tenantId: number, bankAccountId: number) {
+    return this.disconnectBankAccountService.disconnectBankAccount(
+      tenantId,
+      bankAccountId
+    );
+  }
+}

packages/server/src/services/Banking/BankAccounts/DisconnectBankAccount.tsx

@@ -0,0 +1,72 @@
+import { Knex } from 'knex';
+import { Inject, Service } from 'typedi';
+import { ServiceError } from '@/exceptions';
+import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
+import { PlaidClientWrapper } from '@/lib/Plaid';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+import UnitOfWork from '@/services/UnitOfWork';
+import events from '@/subscribers/events';
+
+@Service()
+export class DisconnectBankAccount {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  @Inject()
+  private eventPublisher: EventPublisher;
+
+  @Inject()
+  private uow: UnitOfWork;
+
+  /**
+   * Disconnects the given bank account.
+   * @param {number} tenantId 
+   * @param {number} bankAccountId 
+   * @returns {Promise<void>}
+   */
+  async disconnectBankAccount(tenantId: number, bankAccountId: number) {
+    const { Account, PlaidItem } = this.tenancy.models(tenantId);
+
+    const account = await Account.query()
+      .findById(bankAccountId)
+      .where('type', ['bank'])
+      .throwIfNotFound();
+
+    const plaidItem = await PlaidItem.query().findById(account.plaidAccountId);
+
+    if (!plaidItem) {
+      throw new ServiceError(ERRORS.BANK_ACCOUNT_NOT_CONNECTED);
+    }
+    const request = {
+      accessToken: plaidItem.plaidAccessToken,
+    };
+    const plaidInstance = new PlaidClientWrapper();
+
+    // 
+    return this.uow.withTransaction(tenantId, async (trx: Knex.Transaction) => {
+      await this.eventPublisher.emitAsync(events.bankAccount.onDisconnecting, {
+        tenantId,
+        bankAccountId,
+      });
+      // Remove the Plaid item.
+      const data = await plaidInstance.itemRemove(request);
+
+      // Remove the Plaid item from the system.
+      await PlaidItem.query().findById(account.plaidAccountId).delete();
+
+      // Remove the plaid item association to the bank account.
+      await Account.query().findById(bankAccountId).patch({
+        plaidAccountId: null,
+        isFeedsActive: false,
+      });
+      await this.eventPublisher.emitAsync(events.bankAccount.onDisconnected, {
+        tenantId,
+        bankAccountId,
+      });
+    });
+  }
+}
+
+const ERRORS = {
+  BANK_ACCOUNT_NOT_CONNECTED: 'BANK_ACCOUNT_NOT_CONNECTED',
+};