From 708b6f991d1f37013a69f5e880f44ac267131661 Mon Sep 17 00:00:00 2001
From: Thijs Louisse <Thijs.Louisse@ing.com>
Date: Wed, 27 Nov 2019 13:25:59 +0100
Subject: [PATCH] feat(localize): add getCurrencyName

---
 packages/localize/index.js                    |  1 +
 .../localize/src/number/getCurrencyName.js    | 22 +++++++++++++++++++
 .../test/number/getCurrencyName.test.js       | 14 ++++++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 packages/localize/src/number/getCurrencyName.js
 create mode 100644 packages/localize/test/number/getCurrencyName.test.js

diff --git a/packages/localize/index.js b/packages/localize/index.js
index 28534aa83..86412a7c8 100644
--- a/packages/localize/index.js
+++ b/packages/localize/index.js
@@ -6,6 +6,7 @@ export { normalizeDateTime } from './src/date/normalizeDateTime.js';
 export { parseDate } from './src/date/parseDate.js';
 export { formatNumber } from './src/number/formatNumber.js';
 export { formatNumberToParts } from './src/number/formatNumberToParts.js';
+export { getCurrencyName } from './src/number/getCurrencyName.js';
 export { getDecimalSeparator } from './src/number/getDecimalSeparator.js';
 export { getFractionDigits } from './src/number/getFractionDigits.js';
 export { getGroupSeparator } from './src/number/getGroupSeparator.js';
diff --git a/packages/localize/src/number/getCurrencyName.js b/packages/localize/src/number/getCurrencyName.js
new file mode 100644
index 000000000..b2cc8e3dc
--- /dev/null
+++ b/packages/localize/src/number/getCurrencyName.js
@@ -0,0 +1,22 @@
+import { formatNumberToParts } from './formatNumberToParts.js';
+
+/**
+ * Based on number, returns currency name like 'US dollar'
+ *
+ * @param {string} currencyIso iso code like USD
+ * @param {Object} options Intl options are available extended by roundMode
+ * @returns {string} currency name like 'US dollar'
+ */
+export function getCurrencyName(currencyIso, options) {
+  const parts = formatNumberToParts(1, {
+    ...options,
+    style: 'currency',
+    currency: currencyIso,
+    currencyDisplay: 'name',
+  });
+  const currencyName = parts
+    .filter(p => p.type === 'currency')
+    .map(o => o.value)
+    .join(' ');
+  return currencyName;
+}
diff --git a/packages/localize/test/number/getCurrencyName.test.js b/packages/localize/test/number/getCurrencyName.test.js
new file mode 100644
index 000000000..dcb0776d6
--- /dev/null
+++ b/packages/localize/test/number/getCurrencyName.test.js
@@ -0,0 +1,14 @@
+import { expect } from '@open-wc/testing';
+import { localizeTearDown } from '../../test-helpers.js';
+import { getCurrencyName } from '../../src/number/getCurrencyName.js';
+
+describe('getCurrencyName', () => {
+  afterEach(localizeTearDown);
+
+  it('returns the right name for currency and locale combination', async () => {
+    expect(getCurrencyName('USD', { locale: 'en-GB' })).to.equal('US dollars');
+    expect(getCurrencyName('USD', { locale: 'nl-NL' })).to.equal('Amerikaanse dollar');
+    expect(getCurrencyName('EUR', { locale: 'en-GB' })).to.equal('euros');
+    expect(getCurrencyName('EUR', { locale: 'nl-NL' })).to.equal('euro');
+  });
+});