Refactor formatCurrency() to use store settings for formatting rather than store locale.

plugins/woocommerce-admin/client/analytics/report/orders/table.js

@@ -105,7 +105,7 @@ class OrdersReportTable extends Component {
 				line_items,
 				items_sold,
 				coupon_lines,
-				currency,
+				currency_symbol,
 				net_revenue,
 			} = row;
 
@@ -167,7 +167,7 @@ class OrdersReportTable extends Component {
 					value: coupons.map( item => item.code ).join( ' ' ),
 				},
 				{
-					display: formatCurrency( net_revenue, currency ),
+					display: formatCurrency( net_revenue, currency_symbol ),
 					value: net_revenue,
 				},
 			];

plugins/woocommerce-admin/client/header/activity-panel/panels/orders.js

@@ -133,11 +133,11 @@ function OrdersPanel( { orders, isRequesting, isError } ) {
 											</span>
 											{ refundValue ? (
 												<span>
-													<s>{ formatCurrency( total, order.currency ) }</s>{' '}
-													{ formatCurrency( remainingTotal, order.currency ) }
+													<s>{ formatCurrency( total, order.currency_symbol ) }</s>{' '}
+													{ formatCurrency( remainingTotal, order.currency_symbol ) }
 												</span>
 											) : (
-												<span>{ formatCurrency( total, order.currency ) }</span>
+												<span>{ formatCurrency( total, order.currency_symbol ) }</span>
 											) }
 										</div>
 									}

plugins/woocommerce-admin/packages/currency/README.md

@@ -17,10 +17,9 @@ _This package assumes that your code will run in an **ES2015+** environment. If
 ```JS
 import { formatCurrency, getCurrencyFormatDecimal, getCurrencyFormatString } from '@woocommerce/currency';
 
-// Formats money with a given currency code. Uses site's current locale for symbol formatting,
-// from the wcSettings global. Defaults to `en-US`. If no currency provided, this is also
-// pulled from wcSettings, and defaults to USD.
-const total = formatCurrency( 20.923, 'USD' ); // '$20.92'
+// Formats money with a given currency symbol. Uses site's currency settings for formatting,
+// from the wcSettings global. Defaults to symbol=`$`, precision=2, decimalSeparator=`.`, thousandSeparator=`,`
+const total = formatCurrency( 20.923, '$' ); // '$20.92'
 
 // Get the rounded decimal value of a number at the precision used for the current currency,
 // from the wcSettings global. Defaults to 2.

plugins/woocommerce-admin/packages/currency/src/index.js

@@ -3,28 +3,35 @@
  * External dependencies
  */
 import { get, isNaN } from 'lodash';
+import { sprintf } from '@wordpress/i18n';
 
 /**
- * Formats money with a given currency code. Uses site's current locale for symbol formatting
- *
- * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/NumberFormat
- * @param   {Number|String}  number    number to format
- * @param   {String}         currency  currency code e.g. 'USD'
- * @returns {?String}                  A formatted string.
+ * Internal dependencies
  */
-export function formatCurrency( number, currency ) {
-	const locale = wcSettings.siteLocale || 'en-US'; // Default so we don't break.
-	// default to wcSettings if currency is not passed in
-	if ( ! currency ) {
-		currency = get( wcSettings, 'currency.code', 'USD' );
+import { numberFormat } from 'lib/number';
+
+/**
+ * Formats money with a given currency code. Uses site's currency settings for formatting.
+ *
+ * @param   {Number|String} number number to format
+ * @param   {String}        currencySymbol currency code e.g. '$'
+ * @returns {?String} A formatted string.
+ */
+export function formatCurrency( number, currencySymbol ) {
+	// default to wcSettings if currency symbol is not passed in
+	if ( ! currencySymbol ) {
+		currencySymbol = get( wcSettings, [ 'currency', 'symbol' ], '$' );
 	}
-	if ( 'number' !== typeof number ) {
-		number = parseFloat( number );
+
+	const precision = get( wcSettings, [ 'currency', 'precision' ], 2 );
+	const formattedNumber = numberFormat( number, precision );
+	const priceFormat = get( wcSettings, [ 'currency', 'price_format' ], '%1$s%2$s' );
+
+	if ( '' === formattedNumber ) {
+		return formattedNumber;
 	}
-	if ( isNaN( number ) ) {
-		return '';
-	}
-	return new Intl.NumberFormat( locale, { style: 'currency', currency } ).format( number );
+
+	return sprintf( priceFormat, currencySymbol, formattedNumber );
 }
 
 /**

plugins/woocommerce-admin/packages/currency/test/index.js

@@ -10,32 +10,22 @@ describe( 'formatCurrency', () => {
 		expect( formatCurrency( 30 ) ).toBe( '$30.00' );
 	} );
 
-	it( 'should round a number to 2 decimal places in USD', () => {
-		expect( formatCurrency( 9.49258, 'USD' ) ).toBe( '$9.49' );
-		expect( formatCurrency( 30, 'USD' ) ).toBe( '$30.00' );
-		expect( formatCurrency( 3.0002, 'USD' ) ).toBe( '$3.00' );
-	} );
+	it( 'should uses store currency settings, not locale-based', () => {
+		global.wcSettings.currency.code = 'JPY';
+		global.wcSettings.currency.precision = 3;
+		global.wcSettings.currency.decimal_separator = ',';
+		global.wcSettings.currency.thousand_separator = '.';
+		global.wcSettings.currency.price_format = '%2$s%1$s';
 
-	it( 'should round a number to 2 decimal places in GBP', () => {
-		expect( formatCurrency( 8.9272, 'GBP' ) ).toBe( '£8.93' );
-		expect( formatCurrency( 11, 'GBP' ) ).toBe( '£11.00' );
-		expect( formatCurrency( 7.0002, 'GBP' ) ).toBe( '£7.00' );
-	} );
-
-	it( 'should round a number to 0 decimal places in JPY', () => {
-		expect( formatCurrency( 1239.88, 'JPY' ) ).toBe( '¥1,240' );
-		expect( formatCurrency( 1500, 'JPY' ) ).toBe( '¥1,500' );
-		expect( formatCurrency( 33715.02, 'JPY' ) ).toBe( '¥33,715' );
-	} );
-
-	it( 'should correctly convert and round a string', () => {
-		expect( formatCurrency( '19.80', 'USD' ) ).toBe( '$19.80' );
+		expect( formatCurrency( 9.49258, '¥' ) ).toBe( '9,493¥' );
+		expect( formatCurrency( 3000, '¥' ) ).toBe( '3.000,000¥' );
+		expect( formatCurrency( 3.0002, '¥' ) ).toBe( '3,000¥' );
 	} );
 
 	it( "should return empty string when given an input that isn't a number", () => {
-		expect( formatCurrency( 'abc', 'USD' ) ).toBe( '' );
-		expect( formatCurrency( false, 'USD' ) ).toBe( '' );
-		expect( formatCurrency( null, 'USD' ) ).toBe( '' );
+		expect( formatCurrency( 'abc' ) ).toBe( '' );
+		expect( formatCurrency( false ) ).toBe( '' );
+		expect( formatCurrency( null ) ).toBe( '' );
 	} );
 } );
 

plugins/woocommerce-admin/tests/js/setup-globals.js

@@ -44,7 +44,7 @@ wooCommercePackages.forEach( lib => {
 global.wcSettings = {
 	adminUrl: 'https://vagrant.local/wp/wp-admin/',
 	locale: 'en-US',
-	currency: { code: 'USD', precision: 2, symbol: '$' },
+	currency: { code: 'USD', precision: 2, symbol: '$' },
 	date: {
 		dow: 0,
 	},