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matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/Session.kt

@@ -24,6 +24,7 @@ import im.vector.matrix.android.api.session.cache.CacheService
 import im.vector.matrix.android.api.session.content.ContentUploadStateTracker
 import im.vector.matrix.android.api.session.content.ContentUrlResolver
 import im.vector.matrix.android.api.session.crypto.CryptoService
+import im.vector.matrix.android.api.session.file.FileService
 import im.vector.matrix.android.api.session.group.GroupService
 import im.vector.matrix.android.api.session.pushers.PushersService
 import im.vector.matrix.android.api.session.room.RoomDirectoryService
@@ -46,6 +47,7 @@ interface Session :
         CacheService,
         SignOutService,
         FilterService,
+        FileService,
         PushRuleService,
         PushersService {
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/crypto/CryptoService.kt

@@ -105,13 +105,6 @@ interface CryptoService {
 
     fun decryptEventAsync(event: Event, timeline: String, callback: MatrixCallback<MXEventDecryptionResult>)
 
-    /**
-     * Decrypt a file.
-     * Result will be a decrypted file, stored in the cache folder. id parameter will be used to create a sub folder to avoid name collision.
-     * You can pass the eventId
-     */
-    fun decryptFile(id: String, filename: String, url: String, elementToDecrypt: ElementToDecrypt, callback: MatrixCallback<File>)
-
     fun getEncryptionAlgorithm(roomId: String): String?
 
     fun shouldEncryptForInvitedMembers(roomId: String): Boolean

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/session/file/FileService.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.matrix.android.api.session.file
+
+import im.vector.matrix.android.api.MatrixCallback
+import im.vector.matrix.android.internal.crypto.attachments.ElementToDecrypt
+import java.io.File
+
+
+/**
+ * This interface defines methods to get files.
+ */
+interface FileService {
+
+    enum class DownloadMode {
+        /**
+         * Download file in external storage
+         */
+        TO_EXPORT,
+        /**
+         * Download file in cache
+         */
+        FOR_INTERNAL_USE
+    }
+
+    /**
+     * Download a file.
+     * Result will be a decrypted file, stored in the cache folder. id parameter will be used to create a sub folder to avoid name collision.
+     * You can pass the eventId
+     */
+    fun downloadFile(
+            downloadMode: DownloadMode,
+            id: String,
+            fileName: String,
+            url: String?,
+            elementToDecrypt: ElementToDecrypt?,
+            callback: MatrixCallback<File>)
+}

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/CryptoManager.kt

@@ -114,8 +114,6 @@ internal class CryptoManager @Inject constructor(
         private val keysBackup: KeysBackup,
         //
         private val objectSigner: ObjectSigner,
-        // File decryptor
-        private val fileDecryptor: FileDecryptor,
         //
         private val oneTimeKeysUploader: OneTimeKeysUploader,
         //
@@ -611,10 +609,6 @@ internal class CryptoManager @Inject constructor(
         }
     }
 
-    override fun decryptFile(id: String, filename: String, url: String, elementToDecrypt: ElementToDecrypt, callback: MatrixCallback<File>) {
-        fileDecryptor.decryptFile(id, filename, url, elementToDecrypt, callback)
-    }
-
     /**
      * Decrypt an event
      *

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/DefaultFileService.kt

@@ -14,17 +14,18 @@
  * limitations under the License.
  */
 
-package im.vector.matrix.android.internal.crypto
+package im.vector.matrix.android.internal.session
 
 import android.content.Context
+import android.os.Environment
 import arrow.core.Try
 import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.auth.data.SessionParams
 import im.vector.matrix.android.api.session.content.ContentUrlResolver
+import im.vector.matrix.android.api.session.file.FileService
 import im.vector.matrix.android.internal.crypto.attachments.ElementToDecrypt
 import im.vector.matrix.android.internal.crypto.attachments.MXEncryptedAttachments
 import im.vector.matrix.android.internal.extensions.foldToCallback
-import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.util.MatrixCoroutineDispatchers
 import im.vector.matrix.android.internal.util.md5
 import im.vector.matrix.android.internal.util.writeToFile
@@ -38,33 +39,29 @@ import java.io.File
 import java.io.IOException
 import javax.inject.Inject
 
-@SessionScope
-internal class FileDecryptor @Inject constructor(private val context: Context,
+internal class DefaultFileService @Inject constructor(private val context: Context,
                                                       private val sessionParams: SessionParams,
                                                       private val contentUrlResolver: ContentUrlResolver,
-                                                 private val coroutineDispatchers: MatrixCoroutineDispatchers) {
+                                                      private val coroutineDispatchers: MatrixCoroutineDispatchers) : FileService {
 
     val okHttpClient = OkHttpClient()
 
-    fun decryptFile(id: String,
+    /**
+     * Download file in the cache folder, and eventually decrypt it
+     * TODO implement clear file, to delete "MF"
+     */
+    override fun downloadFile(downloadMode: FileService.DownloadMode,
+                              id: String,
                               fileName: String,
-                    url: String,
-                    elementToDecrypt: ElementToDecrypt,
+                              url: String?,
+                              elementToDecrypt: ElementToDecrypt?,
                               callback: MatrixCallback<File>) {
         GlobalScope.launch(coroutineDispatchers.main) {
             withContext(coroutineDispatchers.io) {
                 Try {
-                    // Create dir tree:
-                    // <cache>/DF/<md5(userId)>/<md5(id)>/
-                    val tmpFolderRoot = File(context.cacheDir, "DF")
-                    val tmpFolderUser = File(tmpFolderRoot, sessionParams.credentials.userId.md5())
-                    val tmpFolder = File(tmpFolderUser, id.md5())
+                    val folder = getFolder(downloadMode, id)
 
-                    if (!tmpFolder.exists()) {
-                        tmpFolder.mkdirs()
-                    }
-
-                    File(tmpFolder, fileName)
+                    File(folder, fileName)
                 }.map { destFile ->
                     if (!destFile.exists()) {
                         Try {
@@ -79,11 +76,16 @@ internal class FileDecryptor @Inject constructor(private val context: Context,
                             val response = okHttpClient.newCall(request).execute()
                             val inputStream = response.body()?.byteStream()
                             Timber.v("Response size ${response.body()?.contentLength()} - Stream available: ${inputStream?.available()}")
-                            if (!response.isSuccessful) {
+                            if (!response.isSuccessful
+                                    || inputStream == null) {
                                 throw IOException()
                             }
 
+                            if (elementToDecrypt != null) {
                                 MXEncryptedAttachments.decryptAttachment(inputStream, elementToDecrypt) ?: throw IllegalStateException("Decryption error")
+                            } else {
+                                inputStream
+                            }
                         }
                                 .map { inputStream ->
                                     writeToFile(inputStream, destFile)
@@ -96,4 +98,24 @@ internal class FileDecryptor @Inject constructor(private val context: Context,
                     .foldToCallback(callback)
         }
     }
+
+    private fun getFolder(downloadMode: FileService.DownloadMode, id: String): File {
+        return when (downloadMode) {
+            FileService.DownloadMode.FOR_INTERNAL_USE -> {
+                // Create dir tree (MF stands for Matrix File):
+                // <cache>/MF/<md5(userId)>/<md5(id)>/
+                val tmpFolderRoot = File(context.cacheDir, "MF")
+                val tmpFolderUser = File(tmpFolderRoot, sessionParams.credentials.userId.md5())
+                File(tmpFolderUser, id.md5())
+            }
+            FileService.DownloadMode.TO_EXPORT        -> {
+                Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
+            }
+        }
+                .also { folder ->
+                    if (!folder.exists()) {
+                        folder.mkdirs()
+                    }
+                }
+    }
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/DefaultSession.kt

@@ -21,7 +21,6 @@ import android.os.Looper
 import androidx.annotation.MainThread
 import androidx.lifecycle.LiveData
 import androidx.work.WorkManager
-import com.zhuinden.monarchy.Monarchy
 import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.auth.data.SessionParams
 import im.vector.matrix.android.api.pushrules.PushRuleService
@@ -30,6 +29,7 @@ import im.vector.matrix.android.api.session.cache.CacheService
 import im.vector.matrix.android.api.session.content.ContentUploadStateTracker
 import im.vector.matrix.android.api.session.content.ContentUrlResolver
 import im.vector.matrix.android.api.session.crypto.CryptoService
+import im.vector.matrix.android.api.session.file.FileService
 import im.vector.matrix.android.api.session.group.GroupService
 import im.vector.matrix.android.api.session.pushers.PushersService
 import im.vector.matrix.android.api.session.room.RoomDirectoryService
@@ -61,6 +61,7 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
                                                   private val pushRuleService: PushRuleService,
                                                   private val pushersService: PushersService,
                                                   private val cryptoService: CryptoManager,
+                                                  private val fileService: FileService,
                                                   private val syncThread: SyncThread,
                                                   private val contentUrlResolver: ContentUrlResolver,
                                                   private val contentUploadProgressTracker: ContentUploadStateTracker)
@@ -73,6 +74,7 @@ internal class DefaultSession @Inject constructor(override val sessionParams: Se
         CacheService by cacheService,
         SignOutService by signOutService,
         FilterService by filterService,
+        FileService by fileService,
         PushRuleService by pushRuleService,
         PushersService by pushersService {
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/RoomModule.kt

@@ -19,6 +19,7 @@ package im.vector.matrix.android.internal.session.room
 import dagger.Binds
 import dagger.Module
 import dagger.Provides
+import im.vector.matrix.android.api.session.file.FileService
 import im.vector.matrix.android.api.session.room.RoomDirectoryService
 import im.vector.matrix.android.api.session.room.RoomService
 import im.vector.matrix.android.api.session.room.members.MembershipService
@@ -27,6 +28,7 @@ import im.vector.matrix.android.api.session.room.read.ReadService
 import im.vector.matrix.android.api.session.room.send.SendService
 import im.vector.matrix.android.api.session.room.state.StateService
 import im.vector.matrix.android.api.session.room.timeline.TimelineService
+import im.vector.matrix.android.internal.session.DefaultFileService
 import im.vector.matrix.android.internal.session.SessionScope
 import im.vector.matrix.android.internal.session.room.create.CreateRoomTask
 import im.vector.matrix.android.internal.session.room.create.DefaultCreateRoomTask
@@ -138,4 +140,6 @@ internal abstract class RoomModule {
     @Binds
     abstract fun bindTimelineService(timelineService: DefaultTimelineService): TimelineService
 
+    @Binds
+    abstract fun bindFileService(fileService: DefaultFileService): FileService
 }

vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailActions.kt

@@ -18,6 +18,7 @@ package im.vector.riotx.features.home.room.detail
 
 import com.jaiselrahman.filepicker.model.MediaFile
 import im.vector.matrix.android.api.session.room.model.EditAggregatedSummary
+import im.vector.matrix.android.api.session.room.model.message.MessageFileContent
 import im.vector.matrix.android.api.session.room.timeline.Timeline
 import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
 
@@ -33,6 +34,7 @@ sealed class RoomDetailActions {
     data class UpdateQuickReactAction(val targetEventId: String, val selectedReaction: String, val add: Boolean) : RoomDetailActions()
     data class ShowEditHistoryAction(val event: String, val editAggregatedSummary: EditAggregatedSummary) : RoomDetailActions()
     data class NavigateToEvent(val eventId: String, val position: Int?) : RoomDetailActions()
+    data class DownloadFile(val eventId: String, val messageFileContent: MessageFileContent) : RoomDetailActions()
     object AcceptInvite : RoomDetailActions()
     object RejectInvite : RoomDetailActions()
 

vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailFragment.kt

@@ -63,19 +63,14 @@ import im.vector.riotx.R
 import im.vector.riotx.core.di.ScreenComponent
 import im.vector.riotx.core.dialogs.DialogListItem
 import im.vector.riotx.core.epoxy.LayoutManagerStateRestorer
+import im.vector.riotx.core.error.ErrorFormatter
 import im.vector.riotx.core.extensions.hideKeyboard
 import im.vector.riotx.core.extensions.observeEvent
 import im.vector.riotx.core.extensions.setTextOrHide
+import im.vector.riotx.core.files.addEntryToDownloadManager
 import im.vector.riotx.core.glide.GlideApp
 import im.vector.riotx.core.platform.VectorBaseFragment
-import im.vector.riotx.core.utils.PERMISSIONS_FOR_TAKING_PHOTO
-import im.vector.riotx.core.utils.PERMISSION_REQUEST_CODE_LAUNCH_CAMERA
-import im.vector.riotx.core.utils.PERMISSION_REQUEST_CODE_LAUNCH_NATIVE_CAMERA
-import im.vector.riotx.core.utils.PERMISSION_REQUEST_CODE_LAUNCH_NATIVE_VIDEO_CAMERA
-import im.vector.riotx.core.utils.checkPermissions
-import im.vector.riotx.core.utils.copyToClipboard
-import im.vector.riotx.core.utils.openCamera
-import im.vector.riotx.core.utils.shareMedia
+import im.vector.riotx.core.utils.*
 import im.vector.riotx.features.autocomplete.command.AutocompleteCommandPresenter
 import im.vector.riotx.features.autocomplete.command.CommandAutocompletePolicy
 import im.vector.riotx.features.autocomplete.user.AutocompleteUserPresenter
@@ -180,6 +175,7 @@ class RoomDetailFragment :
     @Inject lateinit var notificationDrawerManager: NotificationDrawerManager
     @Inject lateinit var roomDetailViewModelFactory: RoomDetailViewModel.Factory
     @Inject lateinit var textComposerViewModelFactory: TextComposerViewModel.Factory
+    @Inject lateinit var errorFormatter: ErrorFormatter
     private lateinit var scrollOnNewMessageCallback: ScrollOnNewMessageCallback
     private lateinit var scrollOnHighlightedEventCallback: ScrollOnHighlightedEventCallback
 
@@ -220,6 +216,15 @@ class RoomDetailFragment :
             scrollOnHighlightedEventCallback.scheduleScrollTo(it)
         }
 
+        roomDetailViewModel.downloadedFileEvent.observeEvent(this) { downloadFileState ->
+            if (downloadFileState.throwable != null) {
+                requireActivity().toast(errorFormatter.toHumanReadable(downloadFileState.throwable))
+            } else if (downloadFileState.file != null) {
+                requireActivity().toast(getString(R.string.downloaded_file, downloadFileState.file.path))
+                addEntryToDownloadManager(requireContext(), downloadFileState.file, downloadFileState.mimeType)
+            }
+        }
+
         roomDetailViewModel.selectSubscribe(
                 RoomDetailViewState::sendMode,
                 RoomDetailViewState::selectedEvent,
@@ -615,8 +620,8 @@ class RoomDetailFragment :
         startActivity(intent)
     }
 
-    override fun onFileMessageClicked(messageFileContent: MessageFileContent) {
-        vectorBaseActivity.notImplemented("open file")
+    override fun onFileMessageClicked(eventId: String, messageFileContent: MessageFileContent) {
+        roomDetailViewModel.process(RoomDetailActions.DownloadFile(eventId, messageFileContent))
     }
 
     override fun onAudioMessageClicked(messageAudioContent: MessageAudioContent) {

vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailViewModel.kt

@@ -16,6 +16,7 @@
 
 package im.vector.riotx.features.home.room.detail
 
+import android.content.ClipDescription
 import android.net.Uri
 import android.text.TextUtils
 import androidx.lifecycle.LiveData
@@ -31,10 +32,12 @@ import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.session.Session
 import im.vector.matrix.android.api.session.content.ContentAttachmentData
 import im.vector.matrix.android.api.session.events.model.toModel
+import im.vector.matrix.android.api.session.file.FileService
 import im.vector.matrix.android.api.session.room.model.Membership
 import im.vector.matrix.android.api.session.room.model.message.MessageContent
 import im.vector.matrix.android.api.session.room.model.message.MessageType
 import im.vector.matrix.android.api.session.room.timeline.TimelineEvent
+import im.vector.matrix.android.internal.crypto.attachments.toElementToDecrypt
 import im.vector.matrix.rx.rx
 import im.vector.riotx.R
 import im.vector.riotx.core.intent.getFilenameFromUri
@@ -50,6 +53,7 @@ import io.reactivex.rxkotlin.subscribeBy
 import org.commonmark.parser.Parser
 import org.commonmark.renderer.html.HtmlRenderer
 import timber.log.Timber
+import java.io.File
 import java.text.SimpleDateFormat
 import java.util.*
 import java.util.concurrent.TimeUnit
@@ -113,6 +117,7 @@ class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: Ro
             is RoomDetailActions.EnterEditMode          -> handleEditAction(action)
             is RoomDetailActions.EnterQuoteMode         -> handleQuoteAction(action)
             is RoomDetailActions.EnterReplyMode         -> handleReplyAction(action)
+            is RoomDetailActions.DownloadFile           -> handleDownloadFile(action)
             is RoomDetailActions.NavigateToEvent        -> handleNavigateToEvent(action)
             else                                        -> Timber.e("Unhandled Action: $action")
         }
@@ -149,6 +154,10 @@ class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: Ro
     val navigateToEvent: LiveData<LiveEvent<String>>
         get() = _navigateToEvent
 
+    private val _downloadedFileEvent = MutableLiveData<LiveEvent<DownloadFileState>>()
+    val downloadedFileEvent: LiveData<LiveEvent<DownloadFileState>>
+        get() = _downloadedFileEvent
+
 
     // PRIVATE METHODS *****************************************************************************
 
@@ -433,6 +442,46 @@ class RoomDetailViewModel @AssistedInject constructor(@Assisted initialState: Ro
         }
     }
 
+    data class DownloadFileState(
+            val mimeType: String,
+            val file: File?,
+            val throwable: Throwable?
+    )
+
+    private fun handleDownloadFile(action: RoomDetailActions.DownloadFile) {
+        session.downloadFile(
+                FileService.DownloadMode.TO_EXPORT,
+                action.eventId,
+                action.messageFileContent.filename ?: "file.dat",
+                action.messageFileContent.url,
+                action.messageFileContent.encryptedFileInfo?.toElementToDecrypt(),
+                object : MatrixCallback<File> {
+                    override fun onSuccess(data: File) {
+                        _downloadedFileEvent.postValue(LiveEvent(DownloadFileState(
+                                // Mimetype default to plain text, should not be used
+                                action.messageFileContent.encryptedFileInfo?.mimetype
+                                        ?: action.messageFileContent.info?.mimeType
+                                        ?: ClipDescription.MIMETYPE_TEXT_PLAIN,
+                                data,
+                                null
+                        )))
+                    }
+
+                    override fun onFailure(failure: Throwable) {
+                        _downloadedFileEvent.postValue(LiveEvent(DownloadFileState(
+                                // Mimetype default to plain text, should not be used
+                                action.messageFileContent.encryptedFileInfo?.mimetype
+                                        ?: action.messageFileContent.info?.mimeType
+                                        ?: ClipDescription.MIMETYPE_TEXT_PLAIN,
+                                null,
+                                failure
+                        )))
+                    }
+                })
+
+    }
+
+
     private fun handleNavigateToEvent(action: RoomDetailActions.NavigateToEvent) {
         val targetEventId = action.eventId
 

vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/TimelineEventController.kt

@@ -57,7 +57,7 @@ class TimelineEventController @Inject constructor(private val dateFormatter: Tim
         fun onEncryptedMessageClicked(informationData: MessageInformationData, view: View)
         fun onImageMessageClicked(messageImageContent: MessageImageContent, mediaData: ImageContentRenderer.Data, view: View)
         fun onVideoMessageClicked(messageVideoContent: MessageVideoContent, mediaData: VideoContentRenderer.Data, view: View)
-        fun onFileMessageClicked(messageFileContent: MessageFileContent)
+        fun onFileMessageClicked(eventId: String, messageFileContent: MessageFileContent)
         fun onAudioMessageClicked(messageAudioContent: MessageAudioContent)
         fun onEditedDecorationClicked(informationData: MessageInformationData, editAggregatedSummary: EditAggregatedSummary?)
     }

vector/src/main/java/im/vector/riotx/features/home/room/detail/timeline/factory/MessageItemFactory.kt

@@ -162,7 +162,7 @@ class MessageItemFactory @Inject constructor(
                 }
                 .clickListener(
                         DebouncedClickListener(View.OnClickListener { _ ->
-                            callback?.onFileMessageClicked(messageContent)
+                            callback?.onFileMessageClicked(informationData.eventId, messageContent)
                         }))
     }
 

vector/src/main/java/im/vector/riotx/features/media/VideoContentRenderer.kt

@@ -23,6 +23,7 @@ import android.widget.TextView
 import android.widget.VideoView
 import androidx.core.view.isVisible
 import im.vector.matrix.android.api.MatrixCallback
+import im.vector.matrix.android.api.session.file.FileService
 import im.vector.matrix.android.internal.crypto.attachments.ElementToDecrypt
 import im.vector.riotx.R
 import im.vector.riotx.core.di.ActiveSessionHolder
@@ -64,7 +65,9 @@ class VideoContentRenderer @Inject constructor(private val activeSessionHolder:
                 loadingView.isVisible = true
 
                 activeSessionHolder.getActiveSession()
-                        .decryptFile(data.eventId,
+                        .downloadFile(
+                                FileService.DownloadMode.FOR_INTERNAL_USE,
+                                data.eventId,
                                 data.filename,
                                 data.url,
                                 data.elementToDecrypt,

vector/src/main/res/values/strings_riotX.xml

@@ -11,5 +11,8 @@
     <string name="send_file_step_encrypting_file">Encrypting file…</string>
     <string name="send_file_step_sending_file">Sending file (%1$s / %2$s)</string>
 
+    <string name="downloading_file">Downloading file %1$s…</string>
+    <string name="downloaded_file">File %1$s has been downloaded!</string>
+
 
 </resources>