O3-2778 Add config for different currency types (#3)

src/config-schema.ts

@@ -1,3 +1,12 @@
-export interface BillingConfig {}
+import { Type } from '@openmrs/esm-framework';
 
-export const configSchema = {};
+export const configSchema = {
+  defaultCurrency: {
+    _type: Type.String,
+    _description: 'The default currency for the application. Specify the currency code (e.g., KES, UGX, GBP).',
+    _default: 'KES',
+  },
+};
+export interface ConfigObject {
+  defaultCurrency: string;
+}

src/helpers/functions.ts

@@ -1,4 +1,5 @@
 import { type Payment, type LineItem } from '../types';
+import { configSchema } from '../config-schema';
 
 // amount already paid
 export function calculateTotalAmountTendered(payments: Array<Payment>) {
@@ -32,9 +33,12 @@ export function calculateTotalAmount(lineItems: Array<LineItem>) {
 }
 
 export const convertToCurrency = (amountToConvert: number) => {
-  const formatter = new Intl.NumberFormat('en-KE', {
+  const locale = window.i18next?.language?.substring(0, 2) ?? '';
+  const currencySymbol = configSchema.defaultCurrency._default;
+
+  const formatter = new Intl.NumberFormat(locale, {
     style: 'currency',
-    currency: 'KES',
+    currency: currencySymbol,
     minimumFractionDigits: 2,
   });