Settings: handle lost access to export folder

app/src/main/java/org/fairscan/app/MainActivity.kt

@@ -248,6 +248,9 @@ class MainActivity : ComponentActivity() {
             }
         }
         val settingsUiState by settingsViewModel.uiState.collectAsStateWithLifecycle()
+        LaunchedEffect(Unit) {
+            settingsViewModel.refreshExportDirName()
+        }
         SettingsScreen(
             settingsUiState,
             onChooseDirectoryClick = {

app/src/main/java/org/fairscan/app/ui/screens/settings/SettingsRepository.kt

@@ -37,10 +37,8 @@ class SettingsRepository(private val context: Context) {
             prefs[EXPORT_DIR_URI]
         }
 
-    val exportDirName: Flow<String?> = exportDirUri.map { uriString ->
+    fun resolveExportDirName(uri: String): String? {
-        uriString?.let {
+        return DocumentFile.fromTreeUri(context, uri.toUri())?.name
-            DocumentFile.fromTreeUri(context, it.toUri())?.name
-        }
     }
 
     val exportFormat: Flow<ExportFormat> =

app/src/main/java/org/fairscan/app/ui/screens/settings/SettingsScreen.kt

@@ -14,8 +14,6 @@
  */
 package org.fairscan.app.ui.screens.settings
 
-
-import android.content.Context
 import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.clickable
@@ -41,14 +39,12 @@ import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
-import androidx.core.net.toUri
 import org.fairscan.app.R
 import org.fairscan.app.domain.ExportQuality
 import org.fairscan.app.ui.components.BackButton
@@ -92,7 +88,20 @@ private fun SettingsContent(
     onExportQualityChanged: (ExportQuality) -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    val folderName = uiState.exportDirName ?: stringResource(R.string.download_dirname)
+    println(uiState)
+    val (folderLabel, folderLabelColor) = when {
+        uiState.exportDirUri == null ->
+            stringResource(R.string.download_dirname) to
+                    MaterialTheme.colorScheme.onSurface
+
+        uiState.exportDirName != null ->
+            uiState.exportDirName to
+                    MaterialTheme.colorScheme.onSurface
+
+        else ->
+            stringResource(R.string.export_folder_permission_lost) to
+                    MaterialTheme.colorScheme.error
+    }
 
     Column(
         modifier
@@ -102,13 +111,14 @@ private fun SettingsContent(
     ) {
         DirectorySettingItem(
             label = stringResource(R.string.export_directory),
-            folderName = folderName,
+            folderLabel,
-            onClick = onChooseDirectoryClick
+            folderLabelColor,
+            onClick = onChooseDirectoryClick,
         )
 
         Spacer(Modifier.height(12.dp))
 
-        if (uiState.exportDirName != null) {
+        if (uiState.exportDirUri != null) {
             OutlinedButton(
                 onClick = onResetExportDirClick,
                 border = BorderStroke(1.dp, MaterialTheme.colorScheme.primary),
@@ -156,9 +166,11 @@ private fun SettingsContent(
 @Composable
 fun DirectorySettingItem(
     label: String,
-    folderName: String,
+    folderLabel: String,
+    folderLabelColor: Color,
     onClick: () -> Unit,
-) {
+
+    ) {
     Column {
         Text(
             text = label,
@@ -181,8 +193,9 @@ fun DirectorySettingItem(
                 verticalAlignment = Alignment.CenterVertically
             ) {
                 Text(
-                    text = folderName,
+                    text = folderLabel,
-                    style = MaterialTheme.typography.bodyLarge
+                    style = MaterialTheme.typography.bodyLarge,
+                    color = folderLabelColor,
                 )
 
                 Icon(

app/src/main/java/org/fairscan/app/ui/screens/settings/SettingsViewModel.kt

@@ -16,14 +16,18 @@ package org.fairscan.app.ui.screens.settings
 
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import org.fairscan.app.AppContainer
 import org.fairscan.app.domain.ExportQuality
 
 data class SettingsUiState(
+    val exportDirUri: String? = null,
     val exportDirName: String? = null,
     val exportFormat: ExportFormat = ExportFormat.PDF,
     val exportQuality: ExportQuality = ExportQuality.BALANCED,
@@ -33,13 +37,18 @@ class SettingsViewModel(container: AppContainer) : ViewModel() {
 
     private val repo = container.settingsRepository
 
+    private val _dirName = MutableStateFlow<String?>(null)
+    val dirName: StateFlow<String?> = _dirName
+
     val uiState = combine(
-        repo.exportDirName,
+        repo.exportDirUri,
+        dirName,
         repo.exportFormat,
         repo.exportQuality,
-    ) { dir, format, quality ->
+    ) { uri, name, format, quality ->
         SettingsUiState(
-            exportDirName = dir,
+            exportDirUri = uri,
+            exportDirName = name,
             exportFormat = format,
             exportQuality = quality,
         )
@@ -52,6 +61,7 @@ class SettingsViewModel(container: AppContainer) : ViewModel() {
     fun setExportDirUri(uri: String?) {
         viewModelScope.launch {
             repo.setExportDirUri(uri)
+            refreshExportDirName()
         }
     }
 
@@ -66,4 +76,11 @@ class SettingsViewModel(container: AppContainer) : ViewModel() {
             repo.setExportQuality(quality)
         }
     }
+
+    fun refreshExportDirName() {
+        viewModelScope.launch {
+            val uri = repo.exportDirUri.first()
+            _dirName.value = uri?.let { repo.resolveExportDirName(it) }
+        }
+    }
 }

app/src/main/res/values-cs/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Exportovat</string>
     <string name="export_as">Exportovat jako %1$s</string>
     <string name="export_directory">Složka pro export</string>
+    <string name="export_folder_permission_lost">Ztracený přístup ke složce</string>
     <string name="export_format">Formát exportu</string>
     <string name="export_quality">Kvalita exportu</string>
     <string name="export_quality_low">Nízká</string>

app/src/main/res/values-de/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Exportieren</string>
     <string name="export_as">Als %1$s exportieren</string>
     <string name="export_directory">Exportordner</string>
+    <string name="export_folder_permission_lost">Zugriff auf Ordner verloren</string>
     <string name="export_format">Exportformat</string>
     <string name="export_quality">Exportqualität</string>
     <string name="export_quality_low">Niedrig</string>

app/src/main/res/values-es/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Exportar</string>
     <string name="export_as">Exportar como %1$s</string>
     <string name="export_directory">Carpeta de exportación</string>
+    <string name="export_folder_permission_lost">Acceso a la carpeta perdido</string>
     <string name="export_format">Formato de exportación</string>
     <string name="export_quality">Calidad de exportación</string>
     <string name="export_quality_low">Baja</string>

app/src/main/res/values-fr/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Exporter</string>
     <string name="export_as">Exporter en %1$s</string>
     <string name="export_directory">Dossier d’export</string>
+    <string name="export_folder_permission_lost">Accès au dossier perdu</string>
     <string name="export_format">Format d’export</string>
     <string name="export_quality">Qualité d’export</string>
     <string name="export_quality_low">Basse</string>

app/src/main/res/values-it/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Esporta</string>
     <string name="export_as">Esporta come %1$s</string>
     <string name="export_directory">Cartella di esportazione</string>
+    <string name="export_folder_permission_lost">Accesso alla cartella perso</string>
     <string name="export_format">Formato di esportazione</string>
     <string name="export_quality">Qualità di esportazione</string>
     <string name="export_quality_low">Bassa</string>

app/src/main/res/values-pt-rBR/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Exportar</string>
     <string name="export_as">Exportar como %1$s</string>
     <string name="export_directory">Diretório de exportação</string>
+    <string name="export_folder_permission_lost">Acesso à pasta perdido</string>
     <string name="export_format">Formato de exportação</string>
     <string name="export_quality">Qualidade de exportação</string>
     <string name="export_quality_low">Baixa</string>

app/src/main/res/values-ru/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Экспорт</string>
     <string name="export_as">Экспортировать как %1$s</string>
     <string name="export_directory">Папка экспорта</string>
+    <string name="export_folder_permission_lost">Доступ к папке потерян</string>
     <string name="export_format">Формат экспорта</string>
     <string name="export_quality">Качество экспорта</string>
     <string name="export_quality_low">Низкое</string>

app/src/main/res/values-tr/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">Dışa aktar</string>
     <string name="export_as">%1$s olarak dışa aktar</string>
     <string name="export_directory">Dışa aktarma dizini</string>
+    <string name="export_folder_permission_lost">Klasör erişimi kaybedildi</string>
     <string name="export_format">Dışa aktarma biçimi</string>
     <string name="export_quality">Dışa aktarma kalitesi</string>
     <string name="export_quality_low">Düşük</string>

app/src/main/res/values-zh-rTW/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">匯出</string>
     <string name="export_as">匯出為 %1$s</string>
     <string name="export_directory">匯出目錄</string>
+    <string name="export_folder_permission_lost">資料夾存取權限已遺失</string>
     <string name="export_format">匯出格式</string>
     <string name="export_quality">匯出品質</string>
     <string name="export_quality_low">低</string>

app/src/main/res/values-zh/strings.xml

@@ -28,6 +28,7 @@
     <string name="export">导出</string>
     <string name="export_as">导出为 %1$s</string>
     <string name="export_directory">导出目录</string>
+    <string name="export_folder_permission_lost">文件夹访问权限已丢失</string>
     <string name="export_format">导出格式</string>
     <string name="export_quality">导出质量</string>
     <string name="export_quality_low">低</string>

app/src/main/res/values/strings.xml

@@ -32,6 +32,7 @@
     <string name="export">Export</string>
     <string name="export_as">Export as %1$s</string>
     <string name="export_directory">Export folder</string>
+    <string name="export_folder_permission_lost">Folder access lost</string>
     <string name="export_format">Export format</string>
     <string name="export_quality">Export quality</string>
     <string name="export_quality_low">Low</string>