1 files changed, 72 insertions, 0 deletions
diff --git a/wallet/src/main/java/net/taler/wallet/balances/BalanceManager.kt b/wallet/src/main/java/net/taler/wallet/balances/BalanceManager.kt
new file mode 100644
index 0000000..a036281
--- /dev/null
+++ b/wallet/src/main/java/net/taler/wallet/balances/BalanceManager.kt
@@ -0,0 +1,72 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 Taler Systems S.A.
+ *
+ * GNU Taler is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 3, or (at your option) any later version.
+ *
+ * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package net.taler.wallet.balances
+
+import android.util.Log
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.distinctUntilChanged
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import kotlinx.serialization.Serializable
+import net.taler.wallet.TAG
+import net.taler.wallet.backend.TalerErrorInfo
+import net.taler.wallet.backend.WalletBackendApi
+
+@Serializable
+sealed class BalanceState {
+    data object None: BalanceState()
+    data object Loading: BalanceState()
+
+    data class Success(
+        val balances: List<BalanceItem>,
+    ): BalanceState()
+
+    data class Error(
+        val error: TalerErrorInfo,
+    ): BalanceState()
+}
+
+class BalanceManager(
+    private val api: WalletBackendApi,
+    private val scope: CoroutineScope,
+) {
+    private val mBalanceState = MutableLiveData<BalanceState>()
+    val balanceState: LiveData<BalanceState> get() = mBalanceState.distinctUntilChanged()
+
+    private val mError = MutableLiveData<TalerErrorInfo>()
+    val error: LiveData<TalerErrorInfo> = mError
+
+    fun listBalances(): Job = scope.launch {
+        mBalanceState.value = BalanceState.Loading
+        val balanceResponse = api.request("getBalances", BalanceResponse.serializer())
+
+        balanceResponse.onError {
+            Log.e(TAG, "Error retrieving balances: $it")
+            mBalanceState.value = BalanceState.Error(it)
+        }
+
+        balanceResponse.onSuccess {
+            mBalanceState.value = BalanceState.Success(it.balances)
+        }
+    }
+
+    fun resetBalances() {
+        mBalanceState.value = BalanceState.None
+    }
+}
+\ No newline at end of file