From 4b198c7d5f964607eb95c24ad944e181869f29ac Mon Sep 17 00:00:00 2001
From: Sumner Evans <sumner@beeper.com>
Date: Tue, 8 Aug 2023 12:48:51 -0600
Subject: [PATCH] stickers: passthrough webm and tgs files

I got the mime type of tgs files from here:
https://github.com/tulir/Telethon/blob/main/telethon/utils.py#L54

Signed-off-by: Sumner Evans <sumner@beeper.com>
---
 mautrix_telegram/portal.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mautrix_telegram/portal.py b/mautrix_telegram/portal.py
index 78d0c9c9..68f7d7ff 100644
--- a/mautrix_telegram/portal.py
+++ b/mautrix_telegram/portal.py
@@ -99,6 +99,7 @@
     DocumentAttributeAudio,
     DocumentAttributeFilename,
     DocumentAttributeImageSize,
+    DocumentAttributeSticker,
     DocumentAttributeVideo,
     GeoPoint,
     InputChannel,
@@ -110,6 +111,7 @@
     InputPeerChat,
     InputPeerPhotoFileLocation,
     InputPeerUser,
+    InputStickerSetEmpty,
     InputUser,
     MessageActionChannelCreate,
     MessageActionChatAddUser,
@@ -1841,6 +1843,7 @@ async def _handle_matrix_file(
         max_image_size = self.config["bridge.image_as_file_size"] * 1000**2
         max_image_pixels = self.config["bridge.image_as_file_pixels"]
 
+        attributes = []
         if self.config["bridge.parallel_file_transfer"] and content.url:
             file_handle, file_size = await util.parallel_transfer_to_telegram(
                 client, self.main_intent, content.url, sender_id
@@ -1860,7 +1863,10 @@ async def _handle_matrix_file(
                 file = await self.main_intent.download_media(content.url)
 
             if content.msgtype == MessageType.STICKER:
-                if mime != "image/gif":
+                attributes.append(
+                    DocumentAttributeSticker(alt=content.body, stickerset=InputStickerSetEmpty())
+                )
+                if mime not in ("image/webm", "image/gif", "application/x-tgsticker"):
                     mime, file, w, h = util.convert_image(
                         file, source_mime=mime, target_type="webp"
                     )
@@ -1873,8 +1879,8 @@ async def _handle_matrix_file(
 
         file_handle.name = file_name
         force_document = file_size >= max_image_size
+        attributes.append(DocumentAttributeFilename(file_name=file_name))
 
-        attributes = [DocumentAttributeFilename(file_name=file_name)]
         if content.msgtype == MessageType.VIDEO:
             attributes.append(
                 DocumentAttributeVideo(