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/*
* 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 mBalances = MutableLiveData<List<BalanceItem>>(emptyList())
val balances: LiveData<List<BalanceItem>> = mBalances
private val mState = MutableLiveData<BalanceState>(BalanceState.None)
val state: LiveData<BalanceState> = mState.distinctUntilChanged()
@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.postValue(BalanceState.Error(it))
}
response.onSuccess {
mState.postValue(BalanceState.Success(it.balances))
mBalances.postValue(it.balances)
}
}
}
fun resetBalances() {
mState.value = BalanceState.None
}
}
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