taler-android

PromptPaymentScreen.kt (6622B)

---

 /*
  * This file is part of GNU Taler
  * (C) 2026 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.payment
 
 import android.graphics.Bitmap
 import android.util.Log
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Card
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
 import net.taler.wallet.NavigateCallback
 import net.taler.wallet.R
 import net.taler.wallet.WalletDestination
 import net.taler.wallet.backend.TalerErrorInfo
 import net.taler.wallet.compose.GlobalScaffold
 import net.taler.wallet.compose.LoadingScreen
 import net.taler.wallet.main.MainViewModel
 import net.taler.wallet.main.TAG
 import net.taler.wallet.transactions.TransactionManager
 
 @Composable
 fun PromptPaymentScreen(
     model: MainViewModel,
     onNavigate: NavigateCallback,
     onNavigateBack: () -> Unit,
     onShowError: (TalerErrorInfo) -> Unit,
 ) {
     val paymentManager = model.paymentManager
     val transactionManager = model.transactionManager
     val payStatus by paymentManager.payStatus.observeAsState(PayStatus.None)
     var showImage by remember { mutableStateOf<Bitmap?>(null) }
 
     LaunchedEffect(payStatus) {
         val status = payStatus
         when (status) {
             is PayStatus.Success -> {
                 navigateToTransaction(status.transactionId, transactionManager, onNavigate, onNavigateBack)
                 paymentManager.resetPayStatus()
             }
 
             is PayStatus.AlreadyPaid -> {
                 navigateToTransaction(status.transactionId, transactionManager, onNavigate, onNavigateBack)
                 paymentManager.resetPayStatus()
             }
 
             is PayStatus.Pending -> {
                 navigateToTransaction(status.transactionId, transactionManager, onNavigate, onNavigateBack)
                 paymentManager.resetPayStatus()
                 status.error?.let { error ->
                     onShowError(error)
                 }
             }
 
             else -> {}
         }
     }
 
     GlobalScaffold(
         model = model,
         modifier = Modifier.fillMaxSize(),
         title = { Text(stringResource(R.string.payment_title)) },
         onNavigateBack = onNavigateBack,
     ) { paddingValues ->
         when (val status = payStatus) {
             is PayStatus.None,
             is PayStatus.Loading,
             is PayStatus.Prepared -> LoadingScreen(Modifier.padding(paddingValues))
             is PayStatus.Choices -> {
                 PromptPaymentComposable(
                     modifier = Modifier.padding(paddingValues),
                     status = status,
                     onConfirm = { index, useDonau ->
                         paymentManager.confirmPay(
                             transactionId = status.transactionId,
                             choiceIndex = index,
                             useDonau = useDonau,
                         )
                     },
                     onCancel = {
                         transactionManager.abortTransaction(
                             status.transactionId,
                             onSuccess = {
                                 onNavigateBack()
                             },
                             onError = { error ->
                                 Log.e(TAG, "Error abortTransaction $error")
                                 onShowError(error)
                             }
                         )
                     },
                     onClickImage = { bitmap ->
                         showImage = bitmap
                     },
                     checkDonauStatus = { index ->
                         status.choices.find { it.choiceIndex == index }?.let { choice ->
                             paymentManager.checkDonauForChoice(choice)
                         } ?: DonauStatus.Unavailable
                     },
                     onSetupDonau = { donauBaseUrl ->
                         onNavigate(WalletDestination.SetDonau(donauBaseUrl), false)
                     },
                 )
             }
             else -> {}
         }
     }
 
     if (showImage != null) {
         // ProductImageFragment was a DialogFragment. 
         // For now, we can just use a simple Modal or similar if needed, 
         // but let's just keep it simple or implement a basic compose dialog.
         ProductImageDialog(showImage!!) { showImage = null }
     }
 }
 
 @Composable
 fun ProductImageDialog(bitmap: Bitmap, onDismiss: () -> Unit) {
     Dialog(onDismissRequest = onDismiss) {
         Card(
             shape = MaterialTheme.shapes.medium,
             modifier = Modifier
                 .padding(16.dp)
                 .fillMaxWidth(),
         ) {
             Image(
                 bitmap = bitmap.asImageBitmap(),
                 contentDescription = null,
                 modifier = Modifier
                     .fillMaxWidth()
                     .clickable { onDismiss() }
             )
         }
     }
 }
 
 private suspend fun navigateToTransaction(
     id: String?,
     transactionManager: TransactionManager,
     onNavigate: NavigateCallback,
     onNavigateBack: () -> Unit,
 ) {
     if (id != null && transactionManager.selectTransaction(id)) {
         onNavigate(WalletDestination.TransactionPayment, true)
     } else {
         onNavigateBack()
     }
 }