diff options
Diffstat (limited to 'wallet/src/main/java/net/taler/wallet/balances/BalanceManager.kt')
| -rw-r--r-- | wallet/src/main/java/net/taler/wallet/balances/BalanceManager.kt | 76 |
1 files changed, 76 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..3321cd1 --- /dev/null +++ b/wallet/src/main/java/net/taler/wallet/balances/BalanceManager.kt @@ -0,0 +1,76 @@ +/* + * This file is part of GNU Taler + * (C) 2024 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.annotation.UiThread +import androidx.lifecycle.LiveData +import androidx.lifecycle.MutableLiveData +import androidx.lifecycle.distinctUntilChanged +import kotlinx.coroutines.CoroutineScope +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 +data class BalanceResponse( + val balances: List<BalanceItem> +) + +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 mState = MutableLiveData<BalanceState>(BalanceState.None) + val state: LiveData<BalanceState> = mState.distinctUntilChanged() + + val balancesOrNull get() = (state.value as? BalanceState.Success)?.balances + + @UiThread + fun loadBalances() { + mState.value = BalanceState.Loading + scope.launch { + val response = api.request("getBalances", BalanceResponse.serializer()) + response.onError { + Log.e(TAG, "Error retrieving balances: $it") + mState.value = BalanceState.Error(it) + } + response.onSuccess { + mState.value = BalanceState.Success(it.balances) + } + } + } + + fun resetBalances() { + mState.value = BalanceState.None + } +}
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