refactor: accounts module to Nestjs

packages/server-nest/src/modules/Accounts/GetAccount.service.ts

@@ -0,0 +1,46 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { AccountTransformer } from './Account.transformer';
+import { AccountModel } from './models/Account.model';
+import { AccountRepository } from './repositories/Account.repository';
+import { TransformerInjectable } from '../Transformer/TransformerInjectable.service';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { events } from '@/common/events/events';
+
+@Injectable()
+export class GetAccount {
+  constructor(
+    @Inject(AccountModel.name)
+    private readonly accountModel: typeof AccountModel,
+    private readonly accountRepository: AccountRepository,
+    private readonly transformer: TransformerInjectable,
+    private readonly eventEmitter: EventEmitter2,
+  ) {}
+
+  /**
+   * Retrieve the given account details.
+   * @param {number} accountId
+   */
+  public getAccount = async (accountId: number) => {
+    // Find the given account or throw not found error.
+    const account = await this.accountModel
+      .query()
+      .findById(accountId)
+      .withGraphFetched('plaidItem')
+      .throwIfNotFound();
+
+    const accountsGraph = await this.accountRepository.getDependencyGraph();
+
+    // Transforms the account model to POJO.
+    const transformed = await this.transformer.transform(
+      account,
+      new AccountTransformer(),
+      { accountsGraph },
+    );
+    const eventPayload = { accountId };
+
+    // Triggers `onAccountViewed` event.
+    await this.eventEmitter.emitAsync(events.accounts.onViewed, eventPayload);
+
+    return transformed;
+  };
+}