Updated on 2026-08-14

2023-07-13 09:50:38 +03:00 · 2023-07-13 09:50:38 +03:00 · d8348e54df
commit d8348e54df
parent bde99e272b
14 changed files with 448 additions and 27 deletions
--- a/core/ui/src/main/java/com/tangem/core/ui/utils/BigDecimalFormatter.kt
+++ b/core/ui/src/main/java/com/tangem/core/ui/utils/BigDecimalFormatter.kt
@ -0,0 +1,71 @@
+package com.tangem.core.ui.utils
+
+import java.math.BigDecimal
+import java.math.RoundingMode
+import java.text.NumberFormat
+import java.util.Currency
+import java.util.Locale
+
+object BigDecimalFormatter {
+
+    private const val TEMP_CURRENCY_CODE = "USD"
+
+    fun formatCryptoAmount(
+        cryptoAmount: BigDecimal,
+        cryptoCurrency: String,
+        decimals: Int,
+        locale: Locale = Locale.getDefault(),
+    ): String {
+        val formatterCurrency = getCurrency(cryptoCurrency)
+        val formatter = NumberFormat.getCurrencyInstance(locale).apply {
+            currency = formatterCurrency
+            maximumFractionDigits = decimals.coerceAtMost(maximumValue = 8)
+            minimumFractionDigits = 2
+            roundingMode = RoundingMode.DOWN
+        }
+
+        return formatter.format(cryptoAmount)
+            .replace(formatterCurrency.getSymbol(locale), cryptoCurrency)
+    }
+
+    fun formatFiatAmount(
+        fiatAmount: BigDecimal,
+        fiatCurrencyCode: String,
+        fiatCurrencySymbol: String,
+        locale: Locale = Locale.getDefault(),
+    ): String {
+        val formatterCurrency = getCurrency(fiatCurrencyCode)
+        val formatter = NumberFormat.getCurrencyInstance(locale).apply {
+            currency = formatterCurrency
+            maximumFractionDigits = 2
+            minimumFractionDigits = 2
+            roundingMode = RoundingMode.HALF_UP
+        }
+
+        return formatter.format(fiatAmount)
+            .replace(formatterCurrency.getSymbol(locale), fiatCurrencySymbol)
+    }
+
+    fun formatPercent(percent: BigDecimal, useAbsoluteValue: Boolean, locale: Locale = Locale.getDefault()): String {
+        val formatter = NumberFormat.getPercentInstance(locale).apply {
+            maximumFractionDigits = 2
+            minimumFractionDigits = 2
+            roundingMode = RoundingMode.HALF_UP
+        }
+        val value = if (useAbsoluteValue) percent.abs() else percent
+
+        return formatter.format(value)
+    }
+
+    private fun getCurrency(code: String): Currency {
+        return runCatching { Currency.getInstance(code) }
+            .getOrElse { e ->
+                // Currency code is not valid ISO 4217 code
+                if (e is IllegalArgumentException) {
+                    Currency.getInstance(TEMP_CURRENCY_CODE)
+                } else {
+                    throw e
+                }
+            }
+    }
+}