taler-android

IncomingComposable.kt (9553B)

---

 /*
  * This file is part of GNU Taler
  * (C) 2022 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.peer
 
 import android.annotation.SuppressLint
 import androidx.annotation.StringRes
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.ColumnScope
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Button
 import androidx.compose.material3.Card
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.State
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.ui.Alignment.Companion.CenterHorizontally
 import androidx.compose.ui.Alignment.Companion.End
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import net.taler.common.Amount
 import net.taler.wallet.R
 import net.taler.wallet.backend.TalerErrorCode.WALLET_PEER_PULL_PAYMENT_INSUFFICIENT_BALANCE
 import net.taler.wallet.backend.TalerErrorCode.WALLET_PEER_PUSH_PAYMENT_INSUFFICIENT_BALANCE
 import net.taler.wallet.backend.TalerErrorCode.WALLET_WITHDRAWAL_KYC_REQUIRED
 import net.taler.wallet.backend.TalerErrorInfo
 import net.taler.wallet.systemBarsPaddingBottom
 
 data class IncomingData(
     val isCredit: Boolean,
     @StringRes val intro: Int,
     @StringRes val button: Int,
 )
 
 val incomingPush = IncomingData(
     isCredit = true,
     intro = R.string.receive_peer_payment_intro,
     button = R.string.receive_peer_payment_title,
 )
 
 val incomingPull = IncomingData(
     isCredit = false,
     intro = R.string.pay_peer_intro,
     button = R.string.payment_button_confirm,
 )
 
 @Composable
 fun IncomingComposable(
     state: State<IncomingState>,
     data: IncomingData,
     modifier: Modifier = Modifier,
     onAccept: (IncomingTerms) -> Unit,
 ) {
     val scrollState = rememberScrollState()
     Column(
         modifier = modifier
             .fillMaxSize()
             .verticalScroll(scrollState),
     ) {
         Text(
             modifier = Modifier
                 .padding(16.dp)
                 .align(CenterHorizontally),
             text = stringResource(id = data.intro),
         )
         when (val s = state.value) {
             IncomingChecking -> PeerPullCheckingComposable()
             is IncomingAccepting -> PeerPullTermsComposable(s, onAccept, data)
             is IncomingTerms -> PeerPullTermsComposable(s, onAccept, data)
             is IncomingError -> PeerPullErrorComposable(s)
             is IncomingAccepted -> {
                 // we navigate away, don't show anything
             }
         }
     }
 }
 
 @Composable
 fun ColumnScope.PeerPullCheckingComposable() {
     CircularProgressIndicator(
         modifier = Modifier
             .padding(45.dp)
             .fillMaxWidth()
             .aspectRatio(1f)
             .align(CenterHorizontally),
     )
 }
 
 @Composable
 fun ColumnScope.PeerPullTermsComposable(
     terms: IncomingTerms,
     onAccept: (IncomingTerms) -> Unit,
     data: IncomingData,
 ) {
     Text(
         modifier = Modifier
             .padding(16.dp)
             .align(CenterHorizontally),
         text = terms.contractTerms.summary,
         style = MaterialTheme.typography.headlineSmall,
     )
     Spacer(modifier = Modifier.weight(1f))
     Card(modifier = Modifier.fillMaxWidth()) {
         Column(
             modifier = Modifier
                 .padding(8.dp)
                 .fillMaxWidth()
                 .systemBarsPaddingBottom(),
         ) {
             Row(
                 modifier = Modifier.align(End),
             ) {
                 Text(
                     text = stringResource(id = R.string.amount_total_label),
                     style = MaterialTheme.typography.bodyLarge,
                 )
                 Text(
                     modifier = Modifier.padding(start = 8.dp),
                     text = terms.contractTerms.amount.toString(),
                     style = MaterialTheme.typography.bodyLarge,
                     fontWeight = FontWeight.Bold,
                 )
             }
             // this gets used for credit and debit, so fee calculation differs
             val fee = if (data.isCredit && terms.amountRaw > terms.amountEffective) {
                 terms.amountRaw - terms.amountEffective
             } else if (terms.amountEffective > terms.amountRaw) {
                 terms.amountEffective - terms.amountRaw
             } else null
 
             if (fee != null) {
                 val feeStr = if (data.isCredit) {
                     stringResource(R.string.amount_negative, fee)
                 } else {
                     stringResource(R.string.amount_positive, fee)
                 }
                 Text(
                     modifier = Modifier.align(End),
                     text = feeStr,
                     style = MaterialTheme.typography.bodyLarge,
                     color = MaterialTheme.colorScheme.error,
                 )
             }
 
             if (terms is IncomingAccepting) {
                 CircularProgressIndicator(
                     modifier = Modifier
                         .padding(end = 64.dp)
                         .align(End),
                 )
             } else {
                 Button(
                     modifier = Modifier
                         .align(End)
                         .padding(top = 8.dp),
                     onClick = { onAccept(terms) },
                 ) {
                     Text(
                         text = if (terms is IncomingTosReview) {
                             stringResource(id = R.string.exchange_tos_view)
                         } else {
                             stringResource(id = data.button)
                         }
                     )
                 }
             }
         }
     }
 }
 
 @Composable
 fun ColumnScope.PeerPullErrorComposable(s: IncomingError) {
     val message = when (s.info.code) {
         WALLET_PEER_PULL_PAYMENT_INSUFFICIENT_BALANCE -> stringResource(R.string.payment_balance_insufficient)
         WALLET_PEER_PUSH_PAYMENT_INSUFFICIENT_BALANCE -> stringResource(R.string.payment_balance_insufficient)
         else -> s.info.userFacingMsg
     }
 
     Text(
         modifier = Modifier
             .align(CenterHorizontally)
             .padding(horizontal = 32.dp),
         text = message,
         style = MaterialTheme.typography.headlineSmall,
         color = MaterialTheme.colorScheme.error,
     )
 }
 
 @Preview
 @Composable
 fun PeerPullCheckingPreview() {
     Surface {
         @SuppressLint("UnrememberedMutableState")
         val s = mutableStateOf(IncomingChecking)
         IncomingComposable(s, incomingPush) {}
     }
 }
 
 @Preview(showSystemUi = true)
 @Composable
 fun PeerPullTermsPreview() {
     Surface {
         val terms = IncomingTerms(
             amountRaw = Amount.fromString("TESTKUDOS", "42.23"),
             amountEffective = Amount.fromString("TESTKUDOS", "42.423"),
             contractTerms = PeerContractTerms(
                 summary = "This is a long test summary that can be more than one line long for sure",
                 amount = Amount.fromString("TESTKUDOS", "23.42"),
             ),
             id = "ID123",
         )
 
         @SuppressLint("UnrememberedMutableState")
         val s = mutableStateOf(terms)
         IncomingComposable(s, incomingPush) {}
     }
 }
 
 @Preview(showSystemUi = true)
 @Composable
 fun PeerPullAcceptingPreview() {
     Surface {
         val terms = IncomingTerms(
             amountRaw = Amount.fromString("TESTKUDOS", "42.23"),
             amountEffective = Amount.fromString("TESTKUDOS", "42.123"),
             contractTerms = PeerContractTerms(
                 summary = "This is a long test summary that can be more than one line long for sure",
                 amount = Amount.fromString("TESTKUDOS", "23.42"),
             ),
             id = "ID123",
         )
 
         @SuppressLint("UnrememberedMutableState")
         val s = mutableStateOf(IncomingAccepting(terms))
         IncomingComposable(s, incomingPush) {}
     }
 }
 
 @Preview
 @Composable
 fun PeerPullPayErrorPreview() {
     Surface {
         @SuppressLint("UnrememberedMutableState")
         val s = mutableStateOf(
             IncomingError(
                 info = TalerErrorInfo(WALLET_WITHDRAWAL_KYC_REQUIRED, "hint", "msg"),
             )
         )
         IncomingComposable(s, incomingPush) {}
     }
 }