From 3fef40afca59dd799c042c528ff680317b3c4e8f Mon Sep 17 00:00:00 2001
From: Jon Waldstein <jon@givewp.com>
Date: Fri, 21 Jul 2023 15:18:39 -0400
Subject: [PATCH] feature: add currency setting exchange rate fraction digits
 (#218)

Co-authored-by: Jon Waldstein <jonwaldstein@jons-air.mynetworksettings.com>
---
 .../DonationAmountCurrencySwitcherMessage.tsx | 12 ++++++----
 src/DonationForms/resources/types.ts          |  1 +
 .../DonationForm/CurrencySwitcherSetting.php  | 23 +++++++++++++++++--
 3 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/src/DonationForms/resources/registrars/templates/groups/DonationAmount/DonationAmountCurrencySwitcherMessage.tsx b/src/DonationForms/resources/registrars/templates/groups/DonationAmount/DonationAmountCurrencySwitcherMessage.tsx
index f56602f1f8..05c852fe7b 100644
--- a/src/DonationForms/resources/registrars/templates/groups/DonationAmount/DonationAmountCurrencySwitcherMessage.tsx
+++ b/src/DonationForms/resources/registrars/templates/groups/DonationAmount/DonationAmountCurrencySwitcherMessage.tsx
@@ -54,21 +54,25 @@ export default function DonationAmountCurrencySwitcherMessage({
 }: DonationAmountCurrencySwitcherMessageProps) {
     const {useWatch, useCurrencyFormatter} = window.givewp.form.hooks;
     const currency = useWatch({name: 'currency'});
-    const newCurrencyFormatter = useCurrencyFormatter(currency);
 
     const baseCurrency = currencySettings.find((setting) => setting.exchangeRate === 0)?.id ?? 'USD';
 
     const baseCurrencyFormatter = useCurrencyFormatter(baseCurrency);
 
-    const newCurrencyRate =
-        currencySettings.find((setting) => setting.id === currency)?.exchangeRate.toFixed(2) ?? '1.00';
+    const newCurrencySetting = currencySettings.find((setting) => setting.id === currency);
+
+    const newCurrencyRate = newCurrencySetting?.exchangeRate ?? Number('1.00');
+
+    const newCurrencyRateFormatter = useCurrencyFormatter(currency, {
+        minimumFractionDigits: newCurrencySetting.exchangeRateFractionDigits,
+    });
 
     return (
         <CurrencySwitcherMessage
             baseCurrency={baseCurrency}
             message={message.replace('1.00', baseCurrencyFormatter.format(1))}
             newCurrency={currency}
-            newCurrencyRate={newCurrencyFormatter.format(Number(newCurrencyRate))}
+            newCurrencyRate={newCurrencyRateFormatter.format(newCurrencyRate)}
         />
     );
 }
diff --git a/src/DonationForms/resources/types.ts b/src/DonationForms/resources/types.ts
index 59a241f321..2eb36565d5 100644
--- a/src/DonationForms/resources/types.ts
+++ b/src/DonationForms/resources/types.ts
@@ -23,6 +23,7 @@ export type CurrencySwitcherSetting = {
     id: string;
     exchangeRate: number;
     gateways: string[];
+    exchangeRateFractionDigits: number;
 };
 
 export interface FormData {
diff --git a/src/Framework/FieldsAPI/Properties/DonationForm/CurrencySwitcherSetting.php b/src/Framework/FieldsAPI/Properties/DonationForm/CurrencySwitcherSetting.php
index dc6b47f02c..a567a58504 100644
--- a/src/Framework/FieldsAPI/Properties/DonationForm/CurrencySwitcherSetting.php
+++ b/src/Framework/FieldsAPI/Properties/DonationForm/CurrencySwitcherSetting.php
@@ -21,15 +21,24 @@ class CurrencySwitcherSetting implements JsonSerializable
      * @var string[]
      */
     protected $gateways = [];
+    /**
+     * @var int
+     */
+    protected $exchangeRateFractionDigits;
 
     /**
      * @unreleased
      */
-    public function __construct(string $id, float $exchangeRate = 0, array $gateways = [])
-    {
+    public function __construct(
+        string $id,
+        float $exchangeRate = 0,
+        array $gateways = [],
+        int $exchangeRateFractionDigits = 2
+    ) {
         $this->id = $id;
         $this->exchangeRate = $exchangeRate;
         $this->gateways = $gateways;
+        $this->exchangeRateFractionDigits = $exchangeRateFractionDigits;
     }
 
     /**
@@ -60,6 +69,16 @@ public function exchangeRate(float $rate): CurrencySwitcherSetting
         return $this;
     }
 
+    /**
+     * @unreleased
+     */
+    public function exchangeRateFractionDigits(int $exchangeRateFractionDigits): CurrencySwitcherSetting
+    {
+        $this->exchangeRateFractionDigits = $exchangeRateFractionDigits;
+
+        return $this;
+    }
+
     /**
      * @unreleased
      */