feat(server): ability to assign the base currency as api query when getting latest ex. rate

packages/server/src/api/controllers/ExchangeRates.ts

@@ -1,6 +1,6 @@
 import { Service, Inject } from 'typedi';
 import { Router, Request, Response, NextFunction } from 'express';
-import { query } from 'express-validator';
+import { query, oneOf } from 'express-validator';
 import asyncMiddleware from '@/api/middleware/asyncMiddleware';
 import BaseController from './BaseController';
 import { ServiceError } from '@/exceptions';
@@ -20,7 +20,12 @@ export default class ExchangeRatesController extends BaseController {
 
     router.get(
       '/latest',
-      [query('to_currency').exists().isString()],
+      [
+        oneOf([
+          query('to_currency').exists().isString().isISO4217(),
+          query('from_currency').exists().isString().isISO4217(),
+        ]),
+      ],
       this.validationResult,
       asyncMiddleware(this.latestExchangeRate.bind(this)),
       this.handleServiceError

packages/server/src/interfaces/ExchangeRate.ts

@@ -1,5 +1,6 @@
 export interface ExchangeRateLatestDTO {
   toCurrency: string;
+  fromCurrency: string;
 }
 
 export interface EchangeRateLatestPOJO {

packages/server/src/services/ExchangeRates/ExchangeRatesService.ts

@@ -2,6 +2,7 @@ import { Service } from 'typedi';
 import { ExchangeRate } from '@/lib/ExchangeRate/ExchangeRate';
 import { ExchangeRateServiceType } from '@/lib/ExchangeRate/types';
 import { EchangeRateLatestPOJO, ExchangeRateLatestDTO } from '@/interfaces';
+import { TenantMetadata } from '@/system/models';
 
 @Service()
 export class ExchangeRatesService {
@@ -15,14 +16,20 @@ export class ExchangeRatesService {
     tenantId: number,
     exchangeRateLatestDTO: ExchangeRateLatestDTO
   ): Promise<EchangeRateLatestPOJO> {
+    const organization = await TenantMetadata.query().findOne({ tenantId });
+
+    // Assign the organization base currency as a default currency
+    // if no currency is provided
+    const fromCurrency =
+      exchangeRateLatestDTO.fromCurrency || organization.baseCurrency;
+    const toCurrency =
+      exchangeRateLatestDTO.toCurrency || organization.baseCurrency;
+
     const exchange = new ExchangeRate(ExchangeRateServiceType.OpenExchangeRate);
-    const exchangeRate = await exchange.latest(
-      'USD',
-      exchangeRateLatestDTO.toCurrency
-    );
+    const exchangeRate = await exchange.latest(fromCurrency, toCurrency);
 
     return {
-      baseCurrency: 'USD',
+      baseCurrency: fromCurrency,
       toCurrency: exchangeRateLatestDTO.toCurrency,
       exchangeRate,
     };

packages/server/src/system/models/TenantMetadata.ts

@@ -1,6 +1,8 @@
 import BaseModel from 'models/Model';
 
 export default class TenantMetadata extends BaseModel {
+  baseCurrency: string;
+
   /**
    * Table name.
    */