Updated on 2026-08-14

app/src/main/java/com/tangem/tap/persistence/PreferencesStorage.kt

@@ -0,0 +1,54 @@
+package com.tangem.tap.persistence
+
+import android.app.Application
+import android.content.Context
+import android.content.SharedPreferences
+import com.squareup.moshi.JsonAdapter
+import com.squareup.moshi.Moshi
+import com.squareup.moshi.Types
+import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
+import com.tangem.tap.common.entities.TapCurrency.Companion.DEFAULT_FIAT_CURRENCY
+import com.tangem.tap.common.redux.global.FiatCurrencyName
+import com.tangem.tap.network.coinmarketcap.FiatCurrency
+
+
+class PreferencesStorage(applicationContext: Application) {
+
+    private val preferences: SharedPreferences by lazy {
+        applicationContext.getSharedPreferences(PREFERENCES_NAME, Context.MODE_PRIVATE)
+    }
+
+    private val fiatCurrenciesAdapter: JsonAdapter<List<FiatCurrency>> by lazy {
+        val moshi = Moshi.Builder()
+                .add(KotlinJsonAdapterFactory())
+                .build()
+        val type = Types.newParameterizedType(List::class.java, FiatCurrency::class.java)
+        moshi.adapter(type)
+    }
+
+    fun getAppCurrency(): FiatCurrencyName {
+        return preferences.getString(APP_CURRENCY_KEY, DEFAULT_FIAT_CURRENCY)
+                ?: DEFAULT_FIAT_CURRENCY
+    }
+
+    fun saveAppCurrency(fiatCurrencyName: FiatCurrencyName) {
+        return preferences.edit().putString(APP_CURRENCY_KEY, fiatCurrencyName).apply()
+    }
+
+    fun getFiatCurrencies(): List<FiatCurrency>? {
+        val json = preferences.getString(FIAT_CURRENCIES_KEY, "")
+        return if (json.isNullOrBlank()) null else fiatCurrenciesAdapter.fromJson(json) as List<FiatCurrency>
+    }
+
+    fun saveFiatCurrencies(currencies: List<FiatCurrency>) {
+        val json: String = fiatCurrenciesAdapter.toJson(currencies)
+        return preferences.edit().putString(FIAT_CURRENCIES_KEY, json).apply()
+    }
+
+    companion object {
+        private const val PREFERENCES_NAME = "tapPrefs"
+        private const val APP_CURRENCY_KEY = "appCurrency"
+        private const val FIAT_CURRENCIES_KEY = "fiatCurrencies"
+    }
+
+}