display amounts according to currency decimals number count

src/lib/currency.js

@@ -2,6 +2,16 @@ import currencyConstants from '@/consts/currency.js';
 
 import { isString, isNumber } from './common.js';
 
+export function getCurrencyFraction(currencyCode) {
+    const currencyInfo = currencyConstants.all[currencyCode];
+
+    if (currencyInfo) {
+        return currencyInfo.fraction;
+    }
+
+    return null;
+}
+
 export function appendCurrencySymbol(value, currencyDisplayType, currencyCode, currencyUnit, currencyName, isPlural) {
     if (isNumber(value)) {
         value = value.toString();

src/lib/i18n.js

@@ -50,6 +50,7 @@ import {
 } from './numeral.js';
 
 import {
+    getCurrencyFraction,
     appendCurrencySymbol,
     getAmountPrependAndAppendCurrencySymbol
 } from './currency.js';
@@ -936,9 +937,10 @@ function getCurrentDigitGroupingType(translateFn, digitGrouping) {
     return digitGroupingType.type;
 }
 
-function getNumberFormatOptions(translateFn, userStore) {
+function getNumberFormatOptions(translateFn, userStore, currencyCode) {
     return {
         decimalSeparator: getCurrentDecimalSeparator(translateFn, userStore.currentUserDecimalSeparator),
+        decimalNumberCount: getCurrencyFraction(currencyCode),
         digitGroupingSymbol: getCurrentDigitGroupingSymbol(translateFn, userStore.currentUserDigitGroupingSymbol),
         digitGrouping: getCurrentDigitGroupingType(translateFn, userStore.currentUserDigitGrouping),
     };
@@ -954,8 +956,8 @@ function getParsedAmountNumber(value, translateFn, userStore) {
     return parseAmount(value, numberFormatOptions);
 }
 
-function getFormattedAmount(value, translateFn, userStore) {
-    const numberFormatOptions = getNumberFormatOptions(translateFn, userStore);
+function getFormattedAmount(value, translateFn, userStore, currencyCode) {
+    const numberFormatOptions = getNumberFormatOptions(translateFn, userStore, currencyCode);
     return formatAmount(value, numberFormatOptions);
 }
 
@@ -986,7 +988,7 @@ function getFormattedAmountWithCurrency(value, currencyCode, translateFn, userSt
     const isPlural = value !== '100' && value !== '-100';
 
     if (!notConvertValue) {
-        const numberFormatOptions = getNumberFormatOptions(translateFn, userStore);
+        const numberFormatOptions = getNumberFormatOptions(translateFn, userStore, currencyCode);
         const hasIncompleteFlag = isString(value) && value.charAt(value.length - 1) === '+';
 
         if (hasIncompleteFlag) {
@@ -1739,7 +1741,7 @@ export function i18nFunctions(i18nGlobal) {
         getCurrentDigitGroupingType: (userStore) => getCurrentDigitGroupingType(i18nGlobal.t, userStore.currentUserDigitGrouping),
         appendDigitGroupingSymbol: (userStore, value) => getNumberWithDigitGroupingSymbol(value, i18nGlobal.t, userStore),
         parseAmount: (userStore, value) => getParsedAmountNumber(value, i18nGlobal.t, userStore),
-        formatAmount: (userStore, value) => getFormattedAmount(value, i18nGlobal.t, userStore),
+        formatAmount: (userStore, value, currencyCode) => getFormattedAmount(value, i18nGlobal.t, userStore, currencyCode),
         formatAmountWithCurrency: (settingsStore, userStore, value, currencyCode) => getFormattedAmountWithCurrency(value, currencyCode, i18nGlobal.t, userStore, settingsStore),
         formatExchangeRateAmount: (userStore, value) => getFormattedExchangeRateAmount(value, i18nGlobal.t, userStore),
         getAdaptiveAmountRate: (userStore, amount1, amount2, fromExchangeRate, toExchangeRate) => getAdaptiveAmountRate(amount1, amount2, fromExchangeRate, toExchangeRate, i18nGlobal.t, userStore),

src/lib/numeral.js

@@ -146,6 +146,11 @@ export function formatAmount(value, options) {
     }
 
     const decimalSeparator = options.decimalSeparator || numeralConstants.defaultDecimalSeparator.symbol;
+    let decimalNumberCount = options.decimalNumberCount;
+
+    if (!isNumber(decimalNumberCount) || decimalNumberCount > numeralConstants.maxSupportedDecimalNumberCount) {
+        decimalNumberCount = numeralConstants.defaultDecimalNumberCount;
+    }
 
     let integer = '0';
     let decimals = '00';
@@ -159,6 +164,18 @@ export function formatAmount(value, options) {
         decimals = '0' + value;
     }
 
+    if (decimalNumberCount === 0) {
+        if (decimals === '00') {
+            decimals = '';
+        } else if (decimals.charAt(1) === '0') {
+            decimals = decimals.charAt(0);
+        }
+    } else if (decimalNumberCount === 1) {
+        if (decimals.charAt(1) === '0') {
+            decimals = decimals.charAt(0);
+        }
+    }
+
     if (options.trimTailZero) {
         if (decimals.charAt(0) === '0' && decimals.charAt(1) === '0') {
             decimals = '';
@@ -194,6 +211,16 @@ export function formatPercent(value, precision, lowPrecisionValue) {
     return result + '%';
 }
 
+export function getAmountWithDecimalNumberCount(amount, decimalNumberCount) {
+    if (decimalNumberCount === 0) {
+        return Math.floor(amount / 100) * 100;
+    } else if (decimalNumberCount === 1) {
+        return Math.floor(amount / 10) * 10;
+    }
+
+    return amount;
+}
+
 export function formatExchangeRateAmount(exchangeRateAmount, options) {
     if (!options) {
         options = {};