taler-android

ReviewExchangeTosScreen.kt (8406B)

---

 /*
  * 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.exchanges
 
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.Button
 import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.ExposedDropdownMenuBox
 import androidx.compose.material3.LocalTextStyle
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import com.mikepenz.markdown.m3.Markdown
 import com.mikepenz.markdown.m3.markdownTypography
 import com.mikepenz.markdown.model.markdownPadding
 import kotlinx.coroutines.launch
 import net.taler.wallet.R
 import net.taler.wallet.backend.TalerErrorInfo
 import net.taler.wallet.compose.BottomButtonBox
 import net.taler.wallet.compose.EmptyComposable
 import net.taler.wallet.compose.ErrorComposable
 import net.taler.wallet.compose.GlobalScaffold
 import net.taler.wallet.compose.LoadingScreen
 import net.taler.wallet.compose.TalerSurface
 import net.taler.wallet.main.MainViewModel
 import net.taler.wallet.systemBarsPaddingBottom
 import java.util.Locale
 
 @Composable
 fun ReviewExchangeTosScreen(
     model: MainViewModel,
     exchangeBaseUrl: String,
     readOnly: Boolean = false,
     onNavigateBack: () -> Unit,
 ) {
     val exchangeManager = model.exchangeManager
     val scope = rememberCoroutineScope()
     var tos: TosResponse? by remember { mutableStateOf(null) }
     var selectedLang by remember { mutableStateOf(Locale.getDefault().language) }
 
     LaunchedEffect(selectedLang) {
         tos = null
         tos = exchangeManager.getExchangeTos(exchangeBaseUrl, selectedLang)
     }
 
     TalerSurface {
         tos?.let { currentTos ->
             ReviewExchangeTosComposable(
                 model = model,
                 tos = currentTos,
                 readOnly = readOnly,
                 onSelectLang = { selectedLang = it },
                 onAcceptTos = {
                     scope.launch {
                         if (exchangeManager.acceptCurrentTos(
                                 exchangeBaseUrl = exchangeBaseUrl,
                                 currentEtag = currentTos.currentEtag,
                             )
                         ) {
                             onNavigateBack()
                         }
                     }
                 },
                 onNavigateBack = onNavigateBack,
             )
         } ?: LoadingScreen()
     }
 }
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun ReviewExchangeTosComposable(
     tos: TosResponse,
     readOnly: Boolean,
     onSelectLang: (String) -> Unit,
     onAcceptTos: () -> Unit,
     onNavigateBack: () -> Unit,
     model: MainViewModel? = null,
 ) {
     if (tos.status == ExchangeTosStatus.MissingTos) {
         EmptyComposable(message = stringResource(R.string.exchange_tos_missing))
         return
     }
 
     var expanded by remember { mutableStateOf(false) }
 
     GlobalScaffold(
         model = model,
         title = { Text(stringResource(R.string.nav_exchange_tos)) },
         onNavigateBack = onNavigateBack,
         bottomBar = {
             if (!readOnly) BottomButtonBox {
                 Button(
                     modifier = Modifier
                         .systemBarsPaddingBottom(),
                     onClick = onAcceptTos,
                 ) {
                     Text(stringResource(R.string.exchange_tos_accept))
                 }
             }
         },
     ) { innerPadding ->
         LazyColumn(Modifier.padding(innerPadding)) {
             if (tos.tosAvailableLanguages.size > 1) item {
                 ExposedDropdownMenuBox(
                     expanded = expanded,
                     onExpandedChange = { expanded = it },
                 ) {
                     OutlinedTextField(
                         modifier = Modifier
                             .padding(horizontal = 16.dp)
                             .fillMaxWidth()
                             .clickable { expanded = true },
                         label = { Text(stringResource(R.string.language)) },
                         value = tos.contentLanguage?.let {
                             Locale(it).displayLanguage
                         } ?: "",
                         onValueChange = {},
                         readOnly = true,
                         enabled = false,
                         singleLine = true,
                         textStyle = LocalTextStyle.current.copy( // show text as if not disabled
                             color = MaterialTheme.colorScheme.onSurface,
                         ),
                     )
 
                     ExposedDropdownMenu (
                         expanded = expanded,
                         onDismissRequest = { expanded = false }
                     ) {
                         tos.tosAvailableLanguages.forEach {
                             DropdownMenuItem(
                                 { Text("${Locale(it).displayLanguage}") },
                                 onClick = {
                                     onSelectLang(it)
                                     expanded = false
                                 }
                             )
                         }
                     }
                 }
             }
 
             item {
                 Markdown(
                     content = tos.content.trimIndent(),
                     modifier = Modifier.padding(16.dp),
                     typography = markdownTypography(
                         h1 = MaterialTheme.typography.headlineLarge,
                         h2 = MaterialTheme.typography.headlineMedium,
                         h3 = MaterialTheme.typography.headlineSmall,
                         h4 = MaterialTheme.typography.titleLarge,
                         h5 = MaterialTheme.typography.titleMedium,
                         h6 = MaterialTheme.typography.titleSmall,
                         text = MaterialTheme.typography.bodyMedium,
                         paragraph = MaterialTheme.typography.bodyMedium,
                     ),
                     padding = markdownPadding(
                         block = 5.dp,
                     ),
                     error = { modifier ->
                         ErrorComposable(
                             TalerErrorInfo.makeCustomError(
                                 stringResource(R.string.exchange_tos_error, "")),
                             modifier = modifier,
                             devMode = false,
                         )
                     },
                 )
             }
         }
     }
 }
 
 @Preview
 @Composable
 fun ReviewExchangeTosComposablePreview() {
     TalerSurface {
         val tos = TosResponse(
             status = ExchangeTosStatus.Proposed,
             content = "# Terms of service\nThis is a terms of service, obviously.\n## H2\n### H3\n#### H4\n##### H5\n###### H6",
             currentEtag = "1.2.0",
             contentLanguage = "en",
             tosAvailableLanguages = listOf("en", "en_US"),
         )
 
         ReviewExchangeTosComposable( tos, false, {}, {}, {}, null)
     }
 }