From 32276934bb60dfa479f5b3f68c78a67cd094d23a Mon Sep 17 00:00:00 2001
From: MM20 <15646950+MM2-0@users.noreply.github.com>
Date: Sat, 18 May 2024 13:01:08 +0200
Subject: [PATCH] =?UTF-8?q?Add=20currency=20converter=20symbol=20aliases?=
 =?UTF-8?q?=20(i.e.=20=E2=82=AC=20for=20EUR)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../currencies/CurrencyRepository.kt          | 99 ++++++++++++++++++-
 .../converters/CurrencyConverter.kt           |  9 +-
 2 files changed, 102 insertions(+), 6 deletions(-)

diff --git a/data/currencies/src/main/java/de/mm20/launcher2/currencies/CurrencyRepository.kt b/data/currencies/src/main/java/de/mm20/launcher2/currencies/CurrencyRepository.kt
index c8b85a4f..2dd2b71a 100644
--- a/data/currencies/src/main/java/de/mm20/launcher2/currencies/CurrencyRepository.kt
+++ b/data/currencies/src/main/java/de/mm20/launcher2/currencies/CurrencyRepository.kt
@@ -2,15 +2,97 @@ package de.mm20.launcher2.currencies
 
 import android.content.Context
 import android.util.Log
-import androidx.work.*
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.PeriodicWorkRequest
+import androidx.work.WorkManager
 import de.mm20.launcher2.database.AppDatabase
-import kotlinx.coroutines.*
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.util.Locale
 import java.util.concurrent.TimeUnit
 
 class CurrencyRepository(
     private val context: Context,
 ) {
 
+    private val currencySymbolAliases = buildMap {
+        val ownCurrency = java.util.Currency.getInstance(Locale.getDefault()).symbol ?: "USD"
+
+        put("€", "EUR")
+
+        val dollarSymbolCurrencies = listOf(
+            // dollar
+            "AUD",
+            "BBD",
+            "BMD",
+            "BND",
+            "BSD",
+            "BZD",
+            "CAD",
+            "FJD",
+            "GYD",
+            "HKD",
+            "JMD",
+            "KID",
+            "KYD",
+            "LRD",
+            "NAD",
+            "NZD",
+            "SBD",
+            "SGD",
+            "SRD",
+            "TTD",
+            "TVD",
+            "TWD",
+            "USD",
+            "XCD",
+            // peso
+            "ARS",
+            "CLP",
+            "COP",
+            "DOP",
+            "MXN",
+            "UYU",
+        )
+
+        if (ownCurrency in dollarSymbolCurrencies) {
+            put("$", ownCurrency)
+        } else {
+            put("$", "USD")
+        }
+
+        val poundSymbolCurrencies = listOf("EGP", "FKP", "GBP", "GIP", "SHP", "SDG", "SYP")
+        if (ownCurrency in poundSymbolCurrencies) {
+            put("£", ownCurrency)
+        } else {
+            put("£", "GBP")
+        }
+
+        put("¥", if (ownCurrency == "CNY") "CNY" else "JPY")
+        put("₩", if (ownCurrency == "KPW") "KPW" else "KRW")
+
+        put("kr", if (ownCurrency == "NOK") "NOK" else "SEK")
+        put("kr.", "DKK")
+        put("Kr", "ISK")
+
+        put("zł", "PLN")
+        put("Kč", "CZK")
+        put("₴", "UAH")
+        put("₽", "RUB")
+        put("Ft", "HUF")
+
+        put("₪", "ILS")
+        put("TL", "TRY")
+
+        put("R$", "BRL")
+
+        put("₱", if (ownCurrency == "CUP") "CUP" else "PHP")
+        put("฿", "THB")
+        put("₹", "INR")
+
+        return@buildMap
+    }
+
     fun enableCurrencyUpdateWorker() {
         val currencyWorker =
             PeriodicWorkRequest.Builder(ExchangeRateWorker::class.java, 60, TimeUnit.MINUTES)
@@ -25,6 +107,16 @@ class CurrencyRepository(
         WorkManager.getInstance(context).cancelUniqueWork("ExchangeRates")
     }
 
+    /**
+     * Resolves currency symbol aliases to their full currency symbol.
+     * (e.g. € -> EUR)
+     * @param symbol The currency symbol to resolve
+     * @return The resolved currency symbol or the original symbol if no alias was found
+     */
+    fun resolveAlias(symbol: String): String {
+        return currencySymbolAliases[symbol] ?: symbol
+    }
+
     suspend fun convertCurrency(
         fromCurrency: String,
         value: Double,
@@ -62,8 +154,9 @@ class CurrencyRepository(
     }
 
     suspend fun isValidCurrency(symbol: String): Boolean {
+        val isoSymbol = currencySymbolAliases[symbol] ?: symbol
         return withContext(Dispatchers.IO) {
-            AppDatabase.getInstance(context).currencyDao().exists(symbol)
+            AppDatabase.getInstance(context).currencyDao().exists(isoSymbol)
         }
     }
 
diff --git a/data/unitconverter/src/main/java/de/mm20/launcher2/unitconverter/converters/CurrencyConverter.kt b/data/unitconverter/src/main/java/de/mm20/launcher2/unitconverter/converters/CurrencyConverter.kt
index 21d5de35..18457cf4 100644
--- a/data/unitconverter/src/main/java/de/mm20/launcher2/unitconverter/converters/CurrencyConverter.kt
+++ b/data/unitconverter/src/main/java/de/mm20/launcher2/unitconverter/converters/CurrencyConverter.kt
@@ -59,7 +59,10 @@ class CurrencyConverter(
 
 
     override suspend fun convert(context: Context, fromUnit: String, value: Double, toUnit: String?): UnitConverter {
-        val values = repository.convertCurrency(fromUnit, value, toUnit).map {
+        val fromIsoCode = repository.resolveAlias(fromUnit)
+        val toIsoCode = toUnit?.let { repository.resolveAlias(it) }
+
+        val values = repository.convertCurrency(fromIsoCode, value, toIsoCode).map {
             UnitValue(it.second, it.first, formatName(it.first, it.second), formatValue(it.first, it.second))
         }.toMutableList()
 
@@ -82,8 +85,8 @@ class CurrencyConverter(
             values.add(0, ownCurrency)
         }
 
-        val inputValue = UnitValue(value, fromUnit, formatName(fromUnit, value), formatValue(fromUnit, value))
-        val lastUpdate = repository.getLastUpdate(fromUnit)
+        val inputValue = UnitValue(value, fromIsoCode, formatName(fromIsoCode, value), formatValue(fromIsoCode, value))
+        val lastUpdate = repository.getLastUpdate(fromIsoCode)
         return CurrencyUnitConverter(dimension, inputValue, values, lastUpdate)
     }
 }
\ No newline at end of file