Media: keep the name of the file when possible

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/file/Context.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023 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 io.element.android.libraries.androidutils.file
+
+import android.content.ContentResolver
+import android.content.Context
+import android.net.Uri
+import android.provider.OpenableColumns
+import java.io.File
+
+fun Context.getFileName(uri: Uri): String? = when (uri.scheme) {
+    ContentResolver.SCHEME_CONTENT -> getContentFileName(uri)
+    else -> uri.path?.let(::File)?.name
+}
+
+private fun Context.getContentFileName(uri: Uri): String? = runCatching {
+    contentResolver.query(uri, null, null, null, null)?.use { cursor ->
+        cursor.moveToFirst()
+        return@use cursor.getColumnIndexOrThrow(OpenableColumns.DISPLAY_NAME).let(cursor::getString)
+    }
+}.getOrNull()

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/file/File.kt

@@ -18,8 +18,6 @@ package io.element.android.libraries.androidutils.file
 
 import android.content.Context
 import io.element.android.libraries.core.data.tryOrNull
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 import timber.log.Timber
 import java.io.File
 import java.util.UUID
@@ -37,7 +35,7 @@ fun File.safeDelete() {
     )
 }
 
-suspend fun Context.createTmpFile(baseDir: File = cacheDir, extension: String? = null): File = withContext(Dispatchers.IO) {
+fun Context.createTmpFile(baseDir: File = cacheDir, extension: String? = null): File {
     val suffix = extension?.let { ".$extension" }
-    File.createTempFile(UUID.randomUUID().toString(), suffix, baseDir).apply { mkdirs() }
+    return File.createTempFile(UUID.randomUUID().toString(), suffix, baseDir).apply { mkdirs() }
 }

libraries/mediaupload/api/src/main/kotlin/io/element/android/libraries/mediaupload/api/MediaPreProcessor.kt

@@ -27,7 +27,8 @@ interface MediaPreProcessor {
     suspend fun process(
         uri: Uri,
         mimeType: String,
-        deleteOriginal: Boolean = false
+        deleteOriginal: Boolean = false,
+        compressIfPossible: Boolean
     ): Result<MediaUploadInfo>
 
     data class Failure(override val cause: Throwable?) : RuntimeException(cause)

libraries/mediaupload/api/src/main/kotlin/io/element/android/libraries/mediaupload/api/MediaSender.kt

@@ -26,9 +26,14 @@ class MediaSender @Inject constructor(
     private val room: MatrixRoom,
 ) {
 
-    suspend fun sendMedia(uri: Uri, mimeType: String): Result<Unit> {
+    suspend fun sendMedia(uri: Uri, mimeType: String, compressIfPossible: Boolean): Result<Unit> {
         return preProcessor
-            .process(uri, mimeType, deleteOriginal = true)
+            .process(
+                uri = uri,
+                mimeType = mimeType,
+                deleteOriginal = true,
+                compressIfPossible = compressIfPossible
+            )
             .flatMap { info ->
                 room.sendMedia(info)
             }

libraries/mediaupload/impl/src/main/kotlin/io/element/android/libraries/mediaupload/AndroidMediaPreProcessor.kt

@@ -23,7 +23,9 @@ import android.net.Uri
 import androidx.exifinterface.media.ExifInterface
 import com.squareup.anvil.annotations.ContributesBinding
 import io.element.android.libraries.androidutils.file.createTmpFile
+import io.element.android.libraries.androidutils.file.getFileName
 import io.element.android.libraries.androidutils.media.runAndRelease
+import io.element.android.libraries.core.coroutine.CoroutineDispatchers
 import io.element.android.libraries.core.data.tryOrNull
 import io.element.android.libraries.core.extensions.mapFailure
 import io.element.android.libraries.core.mimetype.MimeTypes
@@ -41,7 +43,6 @@ import io.element.android.libraries.matrix.api.media.VideoInfo
 import io.element.android.libraries.mediaupload.api.MediaPreProcessor
 import io.element.android.libraries.mediaupload.api.MediaUploadInfo
 import io.element.android.libraries.mediaupload.api.ThumbnailProcessingInfo
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.filterIsInstance
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.onEach
@@ -58,6 +59,7 @@ class AndroidMediaPreProcessor @Inject constructor(
     @ApplicationContext private val context: Context,
     private val imageCompressor: ImageCompressor,
     private val videoCompressor: VideoCompressor,
+    private val coroutineDispatchers: CoroutineDispatchers,
 ) : MediaPreProcessor {
     companion object {
         /**
@@ -92,12 +94,13 @@ class AndroidMediaPreProcessor @Inject constructor(
         uri: Uri,
         mimeType: String,
         deleteOriginal: Boolean,
+        compressIfPossible: Boolean,
     ): Result<MediaUploadInfo> = runCatching {
-        val compressBeforeSending = (
-            mimeType.isMimeTypeImage() && mimeType != MimeTypes.Gif) ||
+        val shouldBeCompressed = compressIfPossible &&
+            (mimeType.isMimeTypeImage() && mimeType != MimeTypes.Gif) ||
             mimeType.isMimeTypeVideo()
 
-        val result = if (compressBeforeSending) {
+        val result = if (shouldBeCompressed) {
             when {
                 mimeType.isMimeTypeImage() -> processImage(uri)
                 mimeType.isMimeTypeVideo() -> processVideo(uri, mimeType)
@@ -123,9 +126,26 @@ class AndroidMediaPreProcessor @Inject constructor(
                 contentResolver.delete(uri, null, null)
             }
         }
-        result
+        result.postProcess(uri)
     }.mapFailure { MediaPreProcessor.Failure(it) }
 
+    private fun MediaUploadInfo.postProcess(uri: Uri): MediaUploadInfo {
+
+        fun File.rename(name: String): File {
+            return File(context.cacheDir, name).also {
+                renameTo(it)
+            }
+        }
+
+        val name = context.getFileName(uri) ?: return this
+        return when (this) {
+            is MediaUploadInfo.AnyFile -> copy(file = file.rename(name))
+            is MediaUploadInfo.Audio -> copy(file = file.rename(name))
+            is MediaUploadInfo.Image -> copy(file = file.rename(name))
+            is MediaUploadInfo.Video -> copy(file = file.rename(name))
+        }
+    }
+
     private suspend fun processImage(uri: Uri): MediaUploadInfo {
         val compressedFileResult = contentResolver.openInputStream(uri).use { input ->
             imageCompressor.compressToTmpFile(
@@ -176,7 +196,6 @@ class AndroidMediaPreProcessor @Inject constructor(
                 inputStream = inputStream,
                 resizeMode = ResizeMode.Strict(THUMB_MAX_WIDTH, THUMB_MAX_HEIGHT),
             ).getOrThrow()
-
         return thumbnailResult.toThumbnailProcessingInfo(MimeTypes.Jpeg)
     }
 
@@ -191,7 +210,7 @@ class AndroidMediaPreProcessor @Inject constructor(
     }
 
     private suspend fun createTmpFileWithInput(inputStream: InputStream): File? {
-        return withContext(Dispatchers.IO) {
+        return withContext(coroutineDispatchers.io) {
             tryOrNull {
                 val tmpFile = context.createTmpFile()
                 tmpFile.outputStream().use { inputStream.copyTo(it) }
@@ -203,7 +222,6 @@ class AndroidMediaPreProcessor @Inject constructor(
     private fun extractVideoMetadata(file: File, mimeType: String?, thumbnailUrl: String?, thumbnailInfo: ThumbnailProcessingInfo?): VideoInfo =
         MediaMetadataRetriever().runAndRelease {
             setDataSource(context, Uri.fromFile(file))
-
             VideoInfo(
                 duration = extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION)?.toLong() ?: 0L,
                 width = extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH)?.toLong() ?: 0L,
@@ -229,7 +247,6 @@ class AndroidMediaPreProcessor @Inject constructor(
                 inputStream = inputStream,
                 resizeMode = ResizeMode.Strict(THUMB_MAX_WIDTH, THUMB_MAX_HEIGHT),
             )
-
             result.getOrThrow().toThumbnailProcessingInfo(MimeTypes.Jpeg)
         }
 

libraries/mediaupload/test/src/main/kotlin/io/element/android/libraries/mediaupload/test/FakeMediaPreProcessor.kt

@@ -36,7 +36,12 @@ class FakeMediaPreProcessor : MediaPreProcessor {
         )
     )
 
-    override suspend fun process(uri: Uri, mimeType: String, deleteOriginal: Boolean): Result<MediaUploadInfo> = result
+    override suspend fun process(
+        uri: Uri,
+        mimeType: String,
+        deleteOriginal: Boolean,
+        compressIfPossible: Boolean
+    ): Result<MediaUploadInfo> = result
 
     fun givenResult(value: Result<MediaUploadInfo>) {
         this.result = value