fix: improve circle video rendering and spoiler interaction

fix: center-crop circle videos and unmirror front camera capture\n\nfix: reveal spoiler text on tap in Android chat messages\nfix: render circle_video correctly on web instead of [empty]

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatScreen.kt

@@ -211,7 +211,9 @@ import androidx.media3.common.MediaItem
 import androidx.media3.common.PlaybackParameters
 import androidx.media3.common.Player
 import androidx.media3.common.util.UnstableApi
+import androidx.media3.effect.Crop
 import androidx.media3.effect.Presentation
+import androidx.media3.effect.ScaleAndRotateTransformation
 import androidx.media3.exoplayer.ExoPlayer
 import androidx.media3.ui.DefaultTimeBar
 import androidx.media3.ui.AspectRatioFrameLayout
@@ -2627,6 +2629,11 @@ private enum class CameraFinalizeAction {
     Cancel,
 }
 
+private data class VideoFrameInfo(
+    val width: Int,
+    val height: Int,
+)
+
 @Composable
 private fun CameraCaptureDialog(
     lifecycleOwner: androidx.lifecycle.LifecycleOwner,
@@ -2652,6 +2659,10 @@ private fun CameraCaptureDialog(
     var durationMs by remember(mode) { mutableStateOf(0L) }
     var finalizeAction by remember(mode) { mutableStateOf<CameraFinalizeAction?>(null) }
 
+    SideEffect {
+        previewView.scaleX = if (lensFacing == CameraSelector.LENS_FACING_FRONT) -1f else 1f
+    }
+
     LaunchedEffect(isRecording) {
         while (isRecording) {
             delay(100L)
@@ -2922,10 +2933,15 @@ private fun CircleVideoRecorderDialog(
     var durationMs by remember { mutableStateOf(0L) }
     var finalizeAction by remember { mutableStateOf<CircleFinalizeAction?>(null) }
     var autoStartPending by remember { mutableStateOf(true) }
+    var recordedLensFacing by remember { mutableStateOf(CameraSelector.LENS_FACING_FRONT) }
     val recordingProgress = (durationMs / 60_000f).coerceIn(0f, 1f)
     val progressTrackColor = Color.White.copy(alpha = 0.22f)
     val progressActiveColor = Color.White
 
+    SideEffect {
+        previewView.scaleX = if (lensFacing == CameraSelector.LENS_FACING_FRONT) -1f else 1f
+    }
+
     DisposableEffect(lifecycleOwner, previewView, lensFacing) {
         val cameraProviderFuture = ProcessCameraProvider.getInstance(context)
         val listener = Runnable {
@@ -2994,6 +3010,7 @@ private fun CircleVideoRecorderDialog(
         activeFile = file
         durationMs = 0L
         isLocked = false
+        recordedLensFacing = lensFacing
         val output = FileOutputOptions.Builder(file).build()
         var pending = capture.output.prepareRecording(context, output)
         if (
@@ -3024,7 +3041,11 @@ private fun CircleVideoRecorderDialog(
                             isProcessing = true
                             scope.launch {
                                 val squaredFile = runCatching {
-                                    transcodeCircleVideoToSquare(context = context, inputFile = completedFile)
+                                    transcodeCircleVideoToSquare(
+                                        context = context,
+                                        inputFile = completedFile,
+                                        mirrorHorizontally = recordedLensFacing == CameraSelector.LENS_FACING_FRONT,
+                                    )
                                 }.getOrNull()
                                 val sourceFile = squaredFile ?: completedFile
                                 val bytes = runCatching { sourceFile.readBytes() }.getOrNull()
@@ -4777,19 +4798,36 @@ private fun resolveRemoteAudioDurationMs(url: String): Int? {
 private suspend fun transcodeCircleVideoToSquare(
     context: Context,
     inputFile: File,
+    mirrorHorizontally: Boolean,
 ): File = suspendCancellableCoroutine { continuation ->
     val outputFile = createTempCaptureFile(context = context, prefix = "circle_square_", suffix = ".mp4")
+    val frameInfo = readVideoFrameInfo(inputFile)
+    val squareCrop = frameInfo?.toCenteredSquareCrop()
     val transformer = Transformer.Builder(context).build()
+    val videoEffects = buildList {
+        if (mirrorHorizontally) {
+            add(
+                ScaleAndRotateTransformation.Builder()
+                    .setScale(-1f, 1f)
+                    .build(),
+            )
+        }
+        if (squareCrop != null) {
+            add(squareCrop)
+        } else {
+            add(
+                Presentation.createForAspectRatio(
+                    1f,
+                    Presentation.LAYOUT_SCALE_TO_FIT_WITH_CROP,
+                ),
+            )
+        }
+    }
     val editedMediaItem = EditedMediaItem.Builder(MediaItem.fromUri(Uri.fromFile(inputFile)))
         .setEffects(
             Effects(
                 emptyList(),
-                listOf(
-                    Presentation.createForAspectRatio(
-                        1f,
-                        Presentation.LAYOUT_SCALE_TO_FIT_WITH_CROP,
-                    ),
-                ),
+                videoEffects,
             ),
         )
         .build()
@@ -4821,6 +4859,54 @@ private suspend fun transcodeCircleVideoToSquare(
     transformer.start(editedMediaItem, outputFile.absolutePath)
 }
 
+private fun readVideoFrameInfo(inputFile: File): VideoFrameInfo? {
+    return runCatching {
+        val retriever = MediaMetadataRetriever()
+        try {
+            retriever.setDataSource(inputFile.absolutePath)
+            val rawWidth = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH)?.toIntOrNull()
+            val rawHeight = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT)?.toIntOrNull()
+            val rotation = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION)?.toIntOrNull() ?: 0
+            val width = rawWidth ?: return@runCatching null
+            val height = rawHeight ?: return@runCatching null
+            if (rotation == 90 || rotation == 270) {
+                VideoFrameInfo(width = height, height = width)
+            } else {
+                VideoFrameInfo(width = width, height = height)
+            }
+        } finally {
+            retriever.release()
+        }
+    }.getOrNull()
+}
+
+private fun VideoFrameInfo.toCenteredSquareCrop(): Crop {
+    return if (width > height) {
+        val horizontalHalfSpan = height.toFloat() / width.toFloat()
+        Crop(
+            -horizontalHalfSpan,
+            horizontalHalfSpan,
+            -1f,
+            1f,
+        )
+    } else if (height > width) {
+        val verticalHalfSpan = width.toFloat() / height.toFloat()
+        Crop(
+            -1f,
+            1f,
+            -verticalHalfSpan,
+            verticalHalfSpan,
+        )
+    } else {
+        Crop(
+            -1f,
+            1f,
+            -1f,
+            1f,
+        )
+    }
+}
+
 private fun extractFileName(url: String): String {
     return runCatching {
         val path = java.net.URI(url).path.orEmpty()

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/MessageFormatting.kt

@@ -2,6 +2,8 @@ package ru.daemonlord.messenger.ui.chat
 
 import androidx.compose.foundation.text.ClickableText
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalUriHandler
@@ -72,12 +74,26 @@ fun FormattedMessageText(
     modifier: Modifier = Modifier,
 ) {
     val uriHandler = LocalUriHandler.current
-    val annotated = buildFormattedMessage(text = text, baseColor = color)
+    val revealedSpoilers = androidx.compose.runtime.remember(text) { mutableStateListOf<String>() }
+    val annotated = buildFormattedMessage(
+        text = text,
+        baseColor = color,
+        revealedSpoilers = revealedSpoilers.toSet(),
+    )
     ClickableText(
         text = annotated,
         style = style,
         modifier = modifier,
         onClick = { offset ->
+            val spoiler = annotated
+                .getStringAnnotations(tag = "spoiler", start = offset, end = offset)
+                .firstOrNull()
+            if (spoiler != null) {
+                if (!revealedSpoilers.contains(spoiler.item)) {
+                    revealedSpoilers.add(spoiler.item)
+                }
+                return@ClickableText
+            }
             annotated
                 .getStringAnnotations(tag = "url", start = offset, end = offset)
                 .firstOrNull()
@@ -89,7 +105,11 @@ fun FormattedMessageText(
     )
 }
 
-private fun buildFormattedMessage(text: String, baseColor: Color): AnnotatedString {
+private fun buildFormattedMessage(
+    text: String,
+    baseColor: Color,
+    revealedSpoilers: Set<String>,
+): AnnotatedString {
     val codeStyle = SpanStyle(
         fontFamily = FontFamily.Monospace,
         background = Color(0x332A2A2A),
@@ -138,6 +158,7 @@ private fun buildFormattedMessage(text: String, baseColor: Color): AnnotatedStri
                         tokens = tokens,
                         codeStyle = codeStyle,
                         linkStyle = linkStyle,
+                        revealedSpoilers = revealedSpoilers,
                     )
                 } else {
                     appendInlineFormatted(
@@ -145,6 +166,7 @@ private fun buildFormattedMessage(text: String, baseColor: Color): AnnotatedStri
                         tokens = tokens,
                         codeStyle = codeStyle,
                         linkStyle = linkStyle,
+                        revealedSpoilers = revealedSpoilers,
                     )
                 }
                 if (lineIndex != lines.lastIndex) append('\n')
@@ -158,6 +180,7 @@ private fun AnnotatedString.Builder.appendInlineFormatted(
     tokens: List<InlineToken>,
     codeStyle: SpanStyle,
     linkStyle: SpanStyle,
+    revealedSpoilers: Set<String>,
 ) {
     var i = 0
     while (i < source.length) {
@@ -172,6 +195,7 @@ private fun AnnotatedString.Builder.appendInlineFormatted(
                     tokens = tokens,
                     codeStyle = codeStyle,
                     linkStyle = linkStyle,
+                    revealedSpoilers = revealedSpoilers,
                 )
                 addStyle(linkStyle, start, length)
                 addStringAnnotation(tag = "url", annotation = href, start = start, end = length)
@@ -218,8 +242,22 @@ private fun AnnotatedString.Builder.appendInlineFormatted(
                 tokens = tokens,
                 codeStyle = codeStyle,
                 linkStyle = linkStyle,
+                revealedSpoilers = revealedSpoilers,
             )
-            addStyle(token.style, rangeStart, length)
+            if (token.marker == "||") {
+                val spoilerId = "$rangeStart:${length}:${inner.hashCode()}"
+                if (!revealedSpoilers.contains(spoilerId)) {
+                    addStyle(token.style, rangeStart, length)
+                    addStringAnnotation(
+                        tag = "spoiler",
+                        annotation = spoilerId,
+                        start = rangeStart,
+                        end = length,
+                    )
+                }
+            } else {
+                addStyle(token.style, rangeStart, length)
+            }
             i = end + token.marker.length
             matched = true
             break

web/src/components/MessageList.tsx

@@ -1099,8 +1099,9 @@ function renderMessageContent(
       : "";
 
   if (messageType === "image" || messageType === "video" || messageType === "circle_video") {
+    const isCircleVideo = messageType === "circle_video";
     const mediaItems = attachments
-      .filter((item) => item.message_type !== "circle_video")
+      .filter((item) => (isCircleVideo ? item.message_type === "circle_video" : item.message_type !== "circle_video"))
       .filter((item) => item.file_type.startsWith("image/") || item.file_type.startsWith("video/"))
       .map((item) => ({
         url: item.file_url,
@@ -1114,7 +1115,6 @@ function renderMessageContent(
     }
     if (mediaItems.length === 1) {
       const item = mediaItems[0];
-      const isCircleVideo = messageType === "circle_video";
       const blockViewerOpen = isStickerOrGifMedia(item.url);
       return (
         <div className="space-y-1.5">