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truncate large numbers using prettyCount & decouple number related ut…
…ils to seperate object Signed-off-by: starry-shivam <[email protected]>
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app/src/main/java/com/starry/greenstash/utils/NumberUtils.kt
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|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| package com.starry.greenstash.utils | ||
|
|
||
| import java.math.RoundingMode | ||
| import java.text.DecimalFormat | ||
| import java.text.DecimalFormatSymbols | ||
| import java.text.NumberFormat | ||
| import java.util.Currency | ||
| import java.util.Locale | ||
| import kotlin.math.floor | ||
| import kotlin.math.log10 | ||
| import kotlin.math.pow | ||
|
|
||
| /** | ||
| * A collection of utility functions for numbers. | ||
| */ | ||
| object NumberUtils { | ||
|
|
||
| /** | ||
| * Get validated number from the text. | ||
| * | ||
| * @param text The text to validate | ||
| * @return The validated number | ||
| */ | ||
| fun getValidatedNumber(text: String): String { | ||
| val filteredChars = text.filterIndexed { index, c -> | ||
| c.isDigit() || (c == '.' && index != 0 | ||
| && text.indexOf('.') == index) | ||
| || (c == '.' && index != 0 | ||
| && text.count { it == '.' } <= 1) | ||
| } | ||
| return if (filteredChars.count { it == '.' } == 1) { | ||
| val beforeDecimal = filteredChars.substringBefore('.') | ||
| val afterDecimal = filteredChars.substringAfter('.') | ||
| "$beforeDecimal.$afterDecimal" | ||
| } else { | ||
| filteredChars | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Round the decimal number to two decimal places. | ||
| * | ||
| * @param number The number to round | ||
| * @return The rounded number | ||
| */ | ||
| fun roundDecimal(number: Double): Double { | ||
| val locale = DecimalFormatSymbols(Locale.US) | ||
| val df = DecimalFormat("#.##", locale) | ||
| df.roundingMode = RoundingMode.CEILING | ||
| return df.format(number).toDouble() | ||
| } | ||
|
|
||
| /** | ||
| * Format currency based on the currency code. | ||
| * | ||
| * @param amount The amount to format | ||
| * @param currencyCode The currency code | ||
| * @return The formatted currency | ||
| */ | ||
| fun formatCurrency(amount: Double, currencyCode: String): String { | ||
| val nf = NumberFormat.getCurrencyInstance().apply { | ||
| currency = Currency.getInstance(currencyCode) | ||
| maximumFractionDigits = if (currencyCode in setOf( | ||
| "JPY", "DJF", "GNF", "IDR", "KMF", "KRW", "LAK", | ||
| "PYG", "RWF", "VND", "VUV", "XAF", "XOF", "XPF" | ||
| ) | ||
| ) 0 else 2 | ||
| } | ||
| return nf.format(amount) | ||
| } | ||
|
|
||
| /** | ||
| * Get currency symbol based on the currency code. | ||
| * | ||
| * @param currencyCode The currency code | ||
| * @return The currency symbol | ||
| */ | ||
| fun getCurrencySymbol(currencyCode: String): String { | ||
| return Currency.getInstance(currencyCode).symbol | ||
| } | ||
|
|
||
| /** | ||
| * Formats a number into a more readable format with a suffix representing its magnitude. | ||
| * For example, 1000 becomes "1k", 1000000 becomes "1M", etc. | ||
| * | ||
| * @param number The number to format. | ||
| * @return A string representation of the number with a magnitude suffix. | ||
| */ | ||
| fun prettyCount(number: Number): String { | ||
| val suffix = charArrayOf(' ', 'k', 'M', 'B', 'T', 'P', 'E') | ||
| val numValue = number.toLong() | ||
| val value = floor(log10(numValue.toDouble())).toInt() | ||
| val base = value / 3 | ||
| return if (value >= 3 && base < suffix.size) { | ||
| DecimalFormat("#0.0").format( | ||
| numValue / 10.0.pow((base * 3).toDouble()) | ||
| ) + suffix[base] | ||
| } else { | ||
| DecimalFormat("#,##0").format(numValue) | ||
| } | ||
| } | ||
| } |
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