feat(files): save selected files and folders to a device folder

opencloudApp/src/main/java/eu/opencloud/android/dependecyinjection/LocalDataSourceModule.kt

@@ -32,6 +32,8 @@ import eu.opencloud.android.data.authentication.datasources.LocalAuthenticationD
 import eu.opencloud.android.data.authentication.datasources.implementation.OCLocalAuthenticationDataSource
 import eu.opencloud.android.data.capabilities.datasources.LocalCapabilitiesDataSource
 import eu.opencloud.android.data.capabilities.datasources.implementation.OCLocalCapabilitiesDataSource
+import eu.opencloud.android.data.exportjobs.datasources.LocalExportJobDataSource
+import eu.opencloud.android.data.exportjobs.datasources.implementation.OCLocalExportJobDataSource
 import eu.opencloud.android.data.files.datasources.LocalFileDataSource
 import eu.opencloud.android.data.files.datasources.implementation.OCLocalFileDataSource
 import eu.opencloud.android.data.folderbackup.datasources.LocalFolderBackupDataSource
@@ -59,6 +61,7 @@ val localDataSourceModule = module {
 
     single { OpencloudDatabase.getDatabase(androidContext()).appRegistryDao() }
     single { OpencloudDatabase.getDatabase(androidContext()).capabilityDao() }
+    single { OpencloudDatabase.getDatabase(androidContext()).exportJobDao() }
     single { OpencloudDatabase.getDatabase(androidContext()).fileDao() }
     single { OpencloudDatabase.getDatabase(androidContext()).folderBackUpDao() }
     single { OpencloudDatabase.getDatabase(androidContext()).shareDao() }
@@ -73,6 +76,7 @@ val localDataSourceModule = module {
     factoryOf(::OCLocalFolderBackupDataSource) bind LocalFolderBackupDataSource::class
     factoryOf(::OCLocalAppRegistryDataSource) bind LocalAppRegistryDataSource::class
     factoryOf(::OCLocalCapabilitiesDataSource) bind LocalCapabilitiesDataSource::class
+    factoryOf(::OCLocalExportJobDataSource) bind LocalExportJobDataSource::class
     factoryOf(::OCLocalFileDataSource) bind LocalFileDataSource::class
     factoryOf(::OCLocalShareDataSource) bind LocalShareDataSource::class
     factoryOf(::OCLocalSpacesDataSource) bind LocalSpacesDataSource::class

opencloudApp/src/main/java/eu/opencloud/android/dependecyinjection/RepositoryModule.kt

@@ -25,6 +25,7 @@ package eu.opencloud.android.dependecyinjection
 import eu.opencloud.android.data.appregistry.repository.OCAppRegistryRepository
 import eu.opencloud.android.data.authentication.repository.OCAuthenticationRepository
 import eu.opencloud.android.data.capabilities.repository.OCCapabilityRepository
+import eu.opencloud.android.data.exportjobs.repository.OCExportJobRepository
 import eu.opencloud.android.data.files.repository.OCFileRepository
 import eu.opencloud.android.data.folderbackup.repository.OCFolderBackupRepository
 import eu.opencloud.android.data.oauth.repository.OCOAuthRepository
@@ -40,6 +41,7 @@ import eu.opencloud.android.domain.authentication.AuthenticationRepository
 import eu.opencloud.android.domain.authentication.oauth.OAuthRepository
 import eu.opencloud.android.domain.automaticuploads.FolderBackupRepository
 import eu.opencloud.android.domain.capabilities.CapabilityRepository
+import eu.opencloud.android.domain.exportjobs.ExportJobRepository
 import eu.opencloud.android.domain.files.FileRepository
 import eu.opencloud.android.domain.server.ServerInfoRepository
 import eu.opencloud.android.domain.sharing.sharees.ShareeRepository
@@ -56,6 +58,7 @@ val repositoryModule = module {
     factoryOf(::OCAppRegistryRepository) bind AppRegistryRepository::class
     factoryOf(::OCAuthenticationRepository) bind AuthenticationRepository::class
     factoryOf(::OCCapabilityRepository) bind CapabilityRepository::class
+    factoryOf(::OCExportJobRepository) bind ExportJobRepository::class
     factoryOf(::OCFileRepository) bind FileRepository::class
     factoryOf(::OCFolderBackupRepository) bind FolderBackupRepository::class
     factoryOf(::OCOAuthRepository) bind OAuthRepository::class

opencloudApp/src/main/java/eu/opencloud/android/dependecyinjection/UseCaseModule.kt

@@ -64,6 +64,7 @@ import eu.opencloud.android.domain.files.usecases.GetFolderContentAsStreamUseCas
 import eu.opencloud.android.domain.files.usecases.GetFolderContentUseCase
 import eu.opencloud.android.domain.files.usecases.GetFolderImagesUseCase
 import eu.opencloud.android.domain.files.usecases.GetPersonalRootFolderForAccountUseCase
+import eu.opencloud.android.domain.files.usecases.GetRemoteFolderContentUseCase
 import eu.opencloud.android.domain.files.usecases.GetSearchFolderContentUseCase
 import eu.opencloud.android.domain.files.usecases.GetSharedByLinkForAccountAsStreamUseCase
 import eu.opencloud.android.domain.files.usecases.GetSharesRootFolderForAccount
@@ -112,6 +113,7 @@ import eu.opencloud.android.domain.user.usecases.RefreshUserQuotaFromServerAsync
 import eu.opencloud.android.domain.webfinger.usecases.GetOpenCloudInstanceFromWebFingerUseCase
 import eu.opencloud.android.domain.webfinger.usecases.GetOpenCloudInstancesFromAuthenticatedWebFingerUseCase
 import eu.opencloud.android.usecases.accounts.RemoveAccountUseCase
+import eu.opencloud.android.usecases.files.ExportFilesToDeviceUseCase
 import eu.opencloud.android.usecases.files.FilterFileMenuOptionsUseCase
 import eu.opencloud.android.usecases.files.RemoveLocalFilesForAccountUseCase
 import eu.opencloud.android.usecases.files.RemoveLocallyFilesWithLastUsageOlderThanGivenTimeUseCase
@@ -165,6 +167,7 @@ val useCaseModule = module {
     factoryOf(::CreateFolderAsyncUseCase)
     factoryOf(::DisableThumbnailsForFileUseCase)
     factoryOf(::FilterFileMenuOptionsUseCase)
+    factoryOf(::ExportFilesToDeviceUseCase)
     factoryOf(::GetFileByIdAsStreamUseCase)
     factoryOf(::GetFileByIdUseCase)
     factoryOf(::GetFileByRemotePathUseCase)
@@ -174,6 +177,7 @@ val useCaseModule = module {
     factoryOf(::GetFolderImagesUseCase)
     factoryOf(::IsAnyFileAvailableLocallyAndNotAvailableOfflineUseCase)
     factoryOf(::GetPersonalRootFolderForAccountUseCase)
+    factoryOf(::GetRemoteFolderContentUseCase)
     factoryOf(::GetSearchFolderContentUseCase)
     factoryOf(::GetSharedByLinkForAccountAsStreamUseCase)
     factoryOf(::GetSharesRootFolderForAccount)

opencloudApp/src/main/java/eu/opencloud/android/dependecyinjection/ViewModelModule.kt

@@ -91,7 +91,7 @@ val viewModelModule = module {
         ShareViewModel(filePath, accountName, get(), get(), get(), get(), get(), get(), get(), get(), get(), get())
     }
     viewModel { (initialFolderToDisplay: OCFile, fileListOption: FileListOption) ->
-        MainFileListViewModel(get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(),
+        MainFileListViewModel(get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(), get(),
             initialFolderToDisplay, fileListOption)
     }
     viewModel { (ocFile: OCFile) -> ConflictsResolveViewModel(get(), get(), get(), get(), get(), ocFile) }

opencloudApp/src/main/java/eu/opencloud/android/extensions/FileMenuOptionExt.kt

@@ -38,6 +38,7 @@ fun FileMenuOption.toResId() =
         FileMenuOption.SHARE -> R.id.action_share_file
         FileMenuOption.DETAILS -> R.id.action_see_details
         FileMenuOption.SEND -> R.id.action_send_file
+        FileMenuOption.EXPORT -> R.id.action_export_file
         FileMenuOption.SET_AV_OFFLINE -> R.id.action_set_available_offline
         FileMenuOption.UNSET_AV_OFFLINE -> R.id.action_unset_available_offline
     }
@@ -57,6 +58,7 @@ fun FileMenuOption.toStringResId() =
         FileMenuOption.SHARE -> R.string.action_share
         FileMenuOption.DETAILS -> R.string.actionbar_see_details
         FileMenuOption.SEND -> R.string.actionbar_send_file
+        FileMenuOption.EXPORT -> R.string.actionbar_export_file
         FileMenuOption.SET_AV_OFFLINE -> R.string.set_available_offline
         FileMenuOption.UNSET_AV_OFFLINE -> R.string.unset_available_offline
     }
@@ -76,6 +78,7 @@ fun FileMenuOption.toDrawableResId() =
         FileMenuOption.SHARE -> R.drawable.ic_share_generic_white
         FileMenuOption.DETAILS -> R.drawable.ic_info_white
         FileMenuOption.SEND -> R.drawable.ic_send_white
+        FileMenuOption.EXPORT -> R.drawable.ic_action_save_to_device
         FileMenuOption.SET_AV_OFFLINE -> R.drawable.ic_action_set_available_offline
         FileMenuOption.UNSET_AV_OFFLINE -> R.drawable.ic_action_unset_available_offline
     }

opencloudApp/src/main/java/eu/opencloud/android/presentation/files/details/FileDetailsViewModel.kt

@@ -192,6 +192,9 @@ class FileDetailsViewModel(
                     shareViaLinkAllowed = shareViaLinkAllowed,
                     shareWithUsersAllowed = shareWithUsersAllowed,
                     sendAllowed = sendAllowed,
+                    // Exporting to a device folder is offered from the file list (single and
+                    // multi-select), not from the details screen.
+                    exportAllowed = false,
                 )
             )
             result.apply {

opencloudApp/src/main/java/eu/opencloud/android/presentation/files/filelist/MainFileListFragment.kt

@@ -43,6 +43,7 @@ import android.view.WindowManager
 import android.widget.ImageView
 import android.widget.LinearLayout
 import android.widget.TextView
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.view.ActionMode
@@ -54,6 +55,7 @@ import androidx.core.view.isVisible
 import androidx.core.widget.doOnTextChanged
 import androidx.drawerlayout.widget.DrawerLayout
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import androidx.recyclerview.widget.StaggeredGridLayoutManager
 import coil.load
@@ -122,6 +124,7 @@ import eu.opencloud.android.utils.DisplayUtils
 import eu.opencloud.android.utils.MimetypeIconUtil
 import eu.opencloud.android.utils.PreferenceUtils
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import okio.Path.Companion.toPath
 import org.koin.androidx.viewmodel.ext.android.sharedViewModel
@@ -183,6 +186,37 @@ class MainFileListFragment : Fragment(),
 
     private var menu: Menu? = null
     private var checkedFiles: List<OCFile> = emptyList()
+
+    // The unbounded selection itself lives in Room before the external picker is opened. Only its
+    // fixed-size job id is kept in Fragment state while the picker outlives this process.
+    private var pendingExportJobId: Long? = null
+    private var isPreparingExport = false
+
+    private val exportToDeviceFolderLauncher =
+        registerForActivityResult(ActivityResultContracts.OpenDocumentTree()) { treeUri ->
+            val exportJobId = pendingExportJobId
+            clearPendingExport()
+            if (exportJobId != null) {
+                if (treeUri == null) {
+                    mainFileListViewModel.discardPendingExport(exportJobId)
+                } else {
+                    val permissionTaken = runCatching {
+                        requireContext().contentResolver.takePersistableUriPermission(
+                            treeUri,
+                            Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                        )
+                    }.onFailure {
+                        Timber.e(it, "Could not retain access to the selected export folder")
+                    }.isSuccess
+
+                    if (permissionTaken) {
+                        mainFileListViewModel.exportFilesToDevice(exportJobId, treeUri.toString())
+                    } else {
+                        mainFileListViewModel.discardPendingExport(exportJobId)
+                    }
+                }
+            }
+        }
     private var filesToRemove: List<OCFile> = emptyList()
     private var fileSingleFile: OCFile? = null
     private var fileOptionsBottomSheetSingleFileLayout: LinearLayout? = null
@@ -316,6 +350,27 @@ class MainFileListFragment : Fragment(),
         }
     }
 
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        savedInstanceState?.let { savedState ->
+            pendingExportJobId = if (savedState.containsKey(KEY_PENDING_EXPORT_JOB_ID)) {
+                savedState.getLong(KEY_PENDING_EXPORT_JOB_ID)
+            } else {
+                null
+            }
+            // The picker outlives this process, so the restored selection is claimed again before
+            // anything else of this account can collect it.
+            pendingExportJobId?.let { mainFileListViewModel.retainPendingExport(it) }
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        // The SAF folder picker is another app, this fragment may be recreated while it is shown.
+        pendingExportJobId?.let { outState.putLong(KEY_PENDING_EXPORT_JOB_ID, it) }
+            ?: outState.remove(KEY_PENDING_EXPORT_JOB_ID)
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?,
         savedInstanceState: Bundle?
@@ -344,6 +399,42 @@ class MainFileListFragment : Fragment(),
         }
     }
 
+    /**
+     * Persists what has to be exported and only then asks the user for the destination folder.
+     * The selection is consumed once the picker returns, see [exportToDeviceFolderLauncher].
+     */
+    private fun startExportToDeviceFolder(files: List<OCFile>) {
+        val accountName = files.firstOrNull()?.owner
+        val fileIds = files.mapNotNull { it.id }
+        if (accountName == null || fileIds.isEmpty()) {
+            Timber.e("Nothing that could be exported was selected")
+            return
+        }
+        if (pendingExportJobId != null || isPreparingExport) {
+            Timber.w("An export selection is already waiting for a device folder")
+            return
+        }
+
+        isPreparingExport = true
+        viewLifecycleOwner.lifecycleScope.launch {
+            val exportJobId = try {
+                mainFileListViewModel.prepareExportToDevice(fileIds, accountName)
+            } finally {
+                isPreparingExport = false
+            }
+            if (exportJobId == null) {
+                Timber.e("The export selection could not be persisted")
+            } else {
+                pendingExportJobId = exportJobId
+                exportToDeviceFolderLauncher.launch(null)
+            }
+        }
+    }
+
+    private fun clearPendingExport() {
+        pendingExportJobId = null
+    }
+
     override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
         super.onCreateOptionsMenu(menu, inflater)
         (menu.findItem(R.id.action_search).actionView as SearchView).run {
@@ -718,6 +809,10 @@ class MainFileListFragment : Fragment(),
                         }
                     }
 
+                    FileMenuOption.EXPORT -> {
+                        startExportToDeviceFolder(listOf(file))
+                    }
+
                     FileMenuOption.SET_AV_OFFLINE -> {
                         fileOperationsViewModel.performOperation(FileOperation.SetFilesAsAvailableOffline(listOf(file)))
                         if (file.isFolder) {
@@ -1476,6 +1571,11 @@ class MainFileListFragment : Fragment(),
                 true
             }
 
+            R.id.action_export_file -> {
+                startExportToDeviceFolder(checkedFiles)
+                true
+            }
+
             R.id.action_move -> {
                 val action = Intent(activity, FolderPickerActivity::class.java)
                 action.putParcelableArrayListExtra(FolderPickerActivity.EXTRA_FILES, checkedFiles)
@@ -1619,6 +1719,8 @@ class MainFileListFragment : Fragment(),
 
         private const val FILE_DOCXF_EXTENSION = "docxf"
 
+        private const val KEY_PENDING_EXPORT_JOB_ID = "KEY_PENDING_EXPORT_JOB_ID"
+
         @JvmStatic
         fun newInstance(
             initialFolderToDisplay: OCFile,