refactor: expense GL to Nestjs

packages/server-nest/src/modules/Ledger/LedgerStorage.service.ts

@@ -0,0 +1,85 @@
+import { Knex } from 'knex';
+import { ILedger } from './types/Ledger.types';
+import { LedgerContactsBalanceStorage } from './LedgerContactStorage.service';
+import { LedegrAccountsStorage } from './LedgetAccountStorage.service';
+import { LedgerEntriesStorageService } from './LedgerEntriesStorage.service';
+import { Ledger } from './Ledger';
+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class LedgerStorageService {
+  constructor(
+    private ledgerContactsBalance: LedgerContactsBalanceStorage,
+    private ledgerAccountsBalance: LedegrAccountsStorage,
+    private ledgerEntriesService: LedgerEntriesStorageService,
+  ) {}
+
+  /**
+   * Commit the ledger to the storage layer as one unit-of-work.
+   * @param {ILedger} ledger
+   * @returns {Promise<void>}
+   */
+  public commit = async (
+    ledger: ILedger,
+    trx?: Knex.Transaction,
+  ): Promise<void> => {
+    const tasks = [
+      // Saves the ledger entries.
+      this.ledgerEntriesService.saveEntries(ledger, trx),
+
+      // Mutates the associated accounts balances.
+      this.ledgerAccountsBalance.saveAccountsBalance(ledger, trx),
+
+      // Mutates the associated contacts balances.
+      this.ledgerContactsBalance.saveContactsBalance(ledger, trx),
+    ];
+    await Promise.all(tasks);
+  };
+
+  /**
+   * Deletes the given ledger and revert balances.
+   * @param {number} tenantId
+   * @param {ILedger} ledger
+   * @param {Knex.Transaction} trx
+   * @returns {Promise<void>}
+   */
+  public delete = async (
+    ledger: ILedger,
+    trx?: Knex.Transaction,
+  ) => {
+    const tasks = [
+      // Deletes the ledger entries.
+      this.ledgerEntriesService.deleteEntries(ledger, trx),
+
+      // Mutates the associated accounts balances.
+      this.ledgerAccountsBalance.saveAccountsBalance(ledger, trx),
+
+      // Mutates the associated contacts balances.
+      this.ledgerContactsBalance.saveContactsBalance(ledger, trx),
+    ];
+    await Promise.all(tasks);
+  };
+
+  /**
+   * @param {number | number[]} referenceId
+   * @param {string | string[]} referenceType
+   * @param {Knex.Transaction} trx
+   */
+  public deleteByReference = async (
+    referenceId: number | number[],
+    referenceType: string | string[],
+    trx?: Knex.Transaction,
+  ) => {
+    // Retrieves the transactions of the given reference.
+    const transactions =
+      await transactionsRepository.getTransactionsByReference(
+        referenceId,
+        referenceType,
+      );
+    // Creates a new ledger from transaction and reverse the entries.
+    const reversedLedger = Ledger.fromTransactions(transactions).reverse();
+
+    // Deletes and reverts the balances.
+    await this.delete(tenantId, reversedLedger, trx);
+  };
+}