Fix list of recent documents after introduction of the custom export dir

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

@@ -72,7 +72,7 @@ class AppContainer(context: Context) {
     }
 
     val mainViewModelFactory = viewModelFactory { MainViewModel(it) }
-    val homeViewModelFactory = viewModelFactory { HomeViewModel(it) }
+    val homeViewModelFactory = viewModelFactory { HomeViewModel(it, context) }
     val cameraViewModelFactory = viewModelFactory { CameraViewModel(it) }
     val exportViewModelFactory = viewModelFactory { ExportViewModel(it) }
     val aboutViewModelFactory = viewModelFactory { AboutViewModel(it) }

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

@@ -113,7 +113,7 @@ class MainActivity : ComponentActivity() {
                             navigation = navigation,
                             onClearScan = { viewModel.startNewDocument() },
                             recentDocuments = recentDocs,
-                            onOpenPdf = { file -> openPdf(file.toUri()) }
+                            onOpenPdf = { fileUri -> openPdf(fileUri) }
                         )
                     }
                     is Screen.Main.Camera -> {

app/src/main/java/org/fairscan/app/ui/screens/export/ExportViewModel.kt

@@ -145,12 +145,16 @@ class ExportViewModel(container: AppContainer): ViewModel() {
             val exportDir = settingsRepository.exportDirUri.first()
             var fileInDownloads: File? = null
 
-            val savedUri: Uri =
+            var savedName: String
+            val savedUri: Uri
             if (exportDir == null) {
                 fileInDownloads = pdfFileManager.copyToExternalDir(pdf.file)
-                    fileInDownloads.toUri()
+                savedUri = fileInDownloads.toUri()
+                savedName = fileInDownloads.name
             } else {
-                    copyViaSaf(context, pdf.file, exportDir.toUri())
+                val saved = copyViaSaf(context, pdf.file, exportDir.toUri())
+                savedUri = saved.uri
+                savedName = saved.name?:pdf.file.name
             }
 
             _pdfUiState.update {
@@ -162,11 +166,7 @@ class ExportViewModel(container: AppContainer): ViewModel() {
             fileInDownloads?.let { mediaScan(context, it) }
 
             // TODO remove that call: that should be handled through the ExportEvent
-            homeViewModel.addRecentDocument(
+            homeViewModel.addRecentDocument(savedUri, savedName, pdf.pageCount)
-                // FIXME This is not a file path
-                savedUri.toString(),
-                pdf.pageCount
-            )
         } catch (e: Exception) {
             logger.e("FairScan", "Failed to save PDF", e)
             _events.emit(ExportEvent.SaveError)
@@ -187,7 +187,7 @@ class ExportViewModel(container: AppContainer): ViewModel() {
         context: Context,
         source: File,
         exportDirUri: Uri,
-    ): Uri {
+    ): DocumentFile {
         val resolver = context.contentResolver
 
         val tree = DocumentFile.fromTreeUri(context, exportDirUri)
@@ -203,7 +203,7 @@ class ExportViewModel(container: AppContainer): ViewModel() {
             }
         } ?: throw IllegalStateException("Failed to open SAF output stream")
 
-        return target.uri
+        return target
     }
 
     fun cleanUpOldPdfs(thresholdInMillis: Int) {

app/src/main/java/org/fairscan/app/ui/screens/home/HomeScreen.kt

@@ -14,6 +14,7 @@
  */
 package org.fairscan.app.ui.screens.home
 
+import android.net.Uri
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
@@ -54,6 +55,7 @@ import androidx.compose.ui.platform.LocalContext
 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 kotlinx.collections.immutable.persistentListOf
 import org.fairscan.app.R
 import org.fairscan.app.ui.Navigation
@@ -76,7 +78,7 @@ fun HomeScreen(
     navigation: Navigation,
     onClearScan: () -> Unit,
     recentDocuments: List<RecentDocumentUiState>,
-    onOpenPdf: (File) -> Unit,
+    onOpenPdf: (Uri) -> Unit,
 ) {
     Scaffold (
         topBar = {
@@ -227,7 +229,7 @@ fun OngoingScanBanner(
 @Composable
 private fun RecentDocumentList(
     recentDocuments: List<RecentDocumentUiState>,
-    onOpenPdf: (File) -> Unit
+    onOpenPdf: (Uri) -> Unit
 ) {
     Spacer(Modifier.height(8.dp))
     Text(
@@ -241,7 +243,7 @@ private fun RecentDocumentList(
             ListItem(
                 headlineContent = {
                     Text(
-                        doc.file.name,
+                        doc.fileName,
                         style = MaterialTheme.typography.bodyMedium
                     )
                 },
@@ -260,7 +262,7 @@ private fun RecentDocumentList(
                         tint = MaterialTheme.colorScheme.onSurfaceVariant
                     )
                 },
-                modifier = Modifier.clickable { onOpenPdf(doc.file) }
+                modifier = Modifier.clickable { onOpenPdf(doc.fileUri) }
             )
         }
     }
@@ -309,8 +311,10 @@ fun HomeScreenPreviewWithLastSavedFiles() {
             navigation = dummyNavigation(),
             onClearScan = {},
             recentDocuments = listOf(
-                RecentDocumentUiState(File("/path/my_file.pdf"), 1755971180000, 3),
+                RecentDocumentUiState(
-                RecentDocumentUiState(File("/path/scan2.pdf"), 1755000500000, 1)
+                    File("/path/my_file.pdf").toUri(), "my_file.pdf", 1755971180000, 3),
+                RecentDocumentUiState(
+                    "content:///path/scan2.pdf".toUri(), "scan2.pdf",1755000500000, 1)
             ),
             onOpenPdf = {},
         )

app/src/main/java/org/fairscan/app/ui/screens/home/HomeUiState.kt

@@ -14,10 +14,11 @@
  */
 package org.fairscan.app.ui.screens.home
 
-import java.io.File
+import android.net.Uri
 
 data class RecentDocumentUiState(
-    val file: File,
+    val fileUri: Uri,
+    val fileName: String,
     val saveTimestamp: Long,
     val pageCount: Int,
 )

app/src/main/java/org/fairscan/app/ui/screens/home/HomeViewModel.kt

@@ -14,6 +14,10 @@
  */
 package org.fairscan.app.ui.screens.home
 
+import android.content.Context
+import android.net.Uri
+import androidx.core.net.toUri
+import androidx.documentfile.provider.DocumentFile
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.flow.SharingStarted
@@ -25,30 +29,45 @@ import org.fairscan.app.AppContainer
 import org.fairscan.app.RecentDocument
 import java.io.File
 
-class HomeViewModel(appContainer: AppContainer): ViewModel() {
+class HomeViewModel(appContainer: AppContainer, appContext: Context): ViewModel() {
 
     private val recentDocumentsDataStore = appContainer.recentDocumentsDataStore
 
     val recentDocuments: StateFlow<List<RecentDocumentUiState>> =
         recentDocumentsDataStore.data.map {
-            it.documentsList.map {
+            it.documentsList.mapNotNull { doc ->
-                    doc ->
+                var fileName = doc.fileName
+                var uri: Uri? = null
+                if (doc.fileUri.isNullOrEmpty()) {
+                    if (!doc.filePath.isNullOrEmpty()) {
+                        val file = File(doc.filePath)
+                        uri = file.toUri()
+                        fileName = file.name
+                    }
+                } else {
+                    uri = doc.fileUri.toUri()
+                }
+                if (uri != null) {
                     RecentDocumentUiState(
-                    file = File(doc.filePath),
+                        fileUri = uri,
+                        fileName = fileName,
                         saveTimestamp = doc.createdAt,
                         pageCount = doc.pageCount,
                     )
-            }.filter { doc -> doc.file.exists() }
+                } else null
+            }.filter { item -> uriExists(appContext, item.fileUri) }
         }.stateIn(
             scope = viewModelScope,
             started = SharingStarted.WhileSubscribed(5_000),
             initialValue = emptyList(),
         )
-    fun addRecentDocument(filePath: String, pageCount: Int) {
+
+    fun addRecentDocument(fileUri: Uri, fileName: String, pageCount: Int) {
         viewModelScope.launch {
             recentDocumentsDataStore.updateData { current ->
                 val newDoc = RecentDocument.newBuilder()
-                    .setFilePath(filePath)
+                    .setFileUri(fileUri.toString())
+                    .setFileName(fileName)
                     .setPageCount(pageCount)
                     .setCreatedAt(System.currentTimeMillis())
                     .build()
@@ -64,4 +83,16 @@ class HomeViewModel(appContainer: AppContainer): ViewModel() {
         }
     }
 
+    private fun uriExists(context: Context, uri: Uri): Boolean {
+        return if (uri.scheme == "file") {
+            File(uri.path.orEmpty()).exists()
+        } else {
+            try {
+                DocumentFile.fromSingleUri(context, uri)?.exists() == true
+            } catch (_: Exception) {
+                false
+            }
+        }
+    }
+
 }

app/src/main/proto/recent_documents.proto

@@ -7,6 +7,8 @@ message RecentDocument {
   string file_path = 1;
   int64 created_at = 2; // timestamp in ms
   int32 page_count = 3;
+  string file_uri = 4;
+  string file_name = 5;
 }
 
 message RecentDocuments {

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

@@ -27,7 +27,7 @@
     <string name="file_size">Velikost souboru: %1$s</string>
     <string name="filename">Název souboru</string>
     <string name="grant_permission">Povolit přístup</string>
-    <string name="last_saved_pdf_files">Poslední PDF uložené do stažených:</string>
+    <string name="last_saved_pdf_files">Poslední PDF uložené v tomto zařízení:</string>
     <string name="libraries">Kníhovny</string>
     <string name="libraries_intro">Tato aplikace využívá několik open-source knihoven včetně:</string>
     <string name="libraries_open_source">Open-source knihovny</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">Dateigröße: %1$s</string>
     <string name="filename">Dateiname</string>
     <string name="grant_permission">Berechtigung erteilen</string>
-    <string name="last_saved_pdf_files">Zuletzt gespeicherte PDFs in Downloads:</string>
+    <string name="last_saved_pdf_files">Zuletzt auf diesem Gerät gespeicherte PDFs:</string>
     <string name="libraries">Bibliotheken</string>
     <string name="libraries_intro">Diese Anwendung verwendet mehrere Open-Source-Bibliotheken, darunter:</string>
     <string name="libraries_open_source">Open-Source-Bibliotheken</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">Tamaño del archivo: %1$s</string>
     <string name="filename">Nombre del archivo</string>
     <string name="grant_permission">Conceder permiso</string>
-    <string name="last_saved_pdf_files">PDF recientes guardados en Descargas:</string>
+    <string name="last_saved_pdf_files">PDF recientes guardados en este dispositivo:</string>
     <string name="libraries">Bibliotecas</string>
     <string name="libraries_intro">Esta aplicación utiliza varias bibliotecas de código abierto, incluidas:</string>
     <string name="libraries_open_source">Bibliotecas de código abierto</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">Taille du fichier : %1$s</string>
     <string name="filename">Nom de fichier</string>
     <string name="grant_permission">Autoriser</string>
-    <string name="last_saved_pdf_files">Derniers PDF enregistrés dans Téléchargements :</string>
+    <string name="last_saved_pdf_files">Derniers PDF enregistrés sur l’appareil :</string>
     <string name="libraries">Bibliothèques</string>
     <string name="libraries_intro">Cette application utilise plusieurs bibliothèques open source, notamment :</string>
     <string name="libraries_open_source">Bibliothèques open source</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">Dimensione file: %1$s</string>
     <string name="filename">Nome file</string>
     <string name="grant_permission">Concendi autorizzazione</string>
-    <string name="last_saved_pdf_files">PDF recenti salvati in Download:</string>
+    <string name="last_saved_pdf_files">PDF recenti salvati su questo dispositivo:</string>
     <string name="libraries">Librerie</string>
     <string name="libraries_intro">Questa app usa diverse librerie open source, incluse:</string>
     <string name="libraries_open_source">Librerie open source</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">Tamanho do arquivo: %1$s</string>
     <string name="filename">Nome do arquivo</string>
     <string name="grant_permission">Conceder permissão</string>
-    <string name="last_saved_pdf_files">PDFs recentes salvos em Downloads:</string>
+    <string name="last_saved_pdf_files">PDFs recentes salvos neste dispositivo:</string>
     <string name="libraries">Bibliotecas</string>
     <string name="libraries_intro">Este aplicativo usa várias bibliotecas de código aberto, incluindo:</string>
     <string name="libraries_open_source">Bibliotecas de código aberto</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">Размер файла: %1$s</string>
     <string name="filename">Имя файла</string>
     <string name="grant_permission">Предоставить разрешение</string>
-    <string name="last_saved_pdf_files">Последние PDF сохранены в Download:</string>
+    <string name="last_saved_pdf_files">Последние PDF, сохранённые на этом устройстве:</string>
     <string name="libraries">Библиотеки</string>
     <string name="libraries_intro">Это приложение использует ряд библиотек с открытым исходным кодом, включая:</string>
     <string name="libraries_open_source">Библиотеки с открытым исходным кодом</string>

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

@@ -27,7 +27,7 @@
     <string name="file_size">文件大小: %1$s</string>
     <string name="filename">文件名字</string>
     <string name="grant_permission">授予权限</string>
-    <string name="last_saved_pdf_files">最近保存的PDF:</string>
+    <string name="last_saved_pdf_files">最近保存在此设备上的 PDF：</string>
     <string name="libraries">库</string>
     <string name="libraries_intro">本应用使用的开源库:</string>
     <string name="libraries_open_source">开源库</string>

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

@@ -28,7 +28,7 @@
     <string name="file_size">File size: %1$s</string>
     <string name="filename">Filename</string>
     <string name="grant_permission">Grant permission</string>
-    <string name="last_saved_pdf_files">Recent PDFs saved in Downloads:</string>
+    <string name="last_saved_pdf_files">Recent PDFs saved on this device:</string>
     <string name="libraries">Libraries</string>
     <string name="libraries_intro">This application uses several open-source libraries, including:</string>
     <string name="libraries_open_source">Open-source libraries</string>