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feat: Improve widget design & responsiveness (#138)
While on that, also moved number formatting and other related utility functions to a separate object, keeping the old functions in the common utility object as is but marked as deprecated for the time being. Will replace them with NumberUtils later and remove them from the common Utils 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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|---|---|---|
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| /** | ||
| * MIT License | ||
| * | ||
| * Copyright (c) [2022 - Present] Stɑrry Shivɑm | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| 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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