fix(telegram): use static thumbnail for animated stickers

astrbot/core/platform/sources/telegram/tg_adapter.py

@@ -596,10 +596,18 @@ def _apply_caption() -> None:
 
         elif update.message.sticker:
             # 将sticker当作图片处理
-            file = await update.message.sticker.get_file()
-            message.message.append(Comp.Image(file=file.file_path, url=file.file_path))
-            if update.message.sticker.emoji:
-                sticker_text = f"Sticker: {update.message.sticker.emoji}"
+            sticker = update.message.sticker
+            if sticker.is_animated or sticker.is_video:
+                # .tgs/.webm stickers are not bitmaps; use the static thumbnail.
+                file = await sticker.thumbnail.get_file() if sticker.thumbnail else None
+            else:
+                file = await sticker.get_file()
+            if file:
+                message.message.append(
+                    Comp.Image(file=file.file_path, url=file.file_path)
+                )
+            if sticker.emoji:
+                sticker_text = f"Sticker: {sticker.emoji}"
                 message.message_str = sticker_text
                 message.message.append(Comp.Plain(sticker_text))
 

tests/test_telegram_adapter.py

@@ -215,6 +215,78 @@ async def test_telegram_video_caption_populates_message_text_and_plain():
     )
 
 
+_STICKER_URL = "https://api.telegram.org/file/test/sticker_1.webp"
+_ANIMATED_URL = "https://api.telegram.org/file/test/sticker_1.tgs"
+_VIDEO_URL = "https://api.telegram.org/file/test/sticker_1.webm"
+_THUMBNAIL_URL = "https://api.telegram.org/file/test/thumb_1.webp"
+
+
+def _make_sticker(
+    file_path: str,
+    *,
+    is_animated: bool = False,
+    is_video: bool = False,
+    thumbnail_path: str | None = None,
+):
+    sticker = create_mock_file(file_path)
+    sticker.emoji = "🙄"
+    sticker.is_animated = is_animated
+    sticker.is_video = is_video
+    sticker.thumbnail = (
+        create_mock_file(thumbnail_path) if thumbnail_path is not None else None
+    )
+    return sticker
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    ("file_path", "flags", "expected_url"),
+    [
+        (_STICKER_URL, {}, _STICKER_URL),
+        (_ANIMATED_URL, {"is_animated": True}, _THUMBNAIL_URL),
+        (_VIDEO_URL, {"is_video": True}, _THUMBNAIL_URL),
+    ],
+    ids=["static", "animated", "video"],
+)
+async def test_telegram_sticker_uses_thumbnail_only_when_animated(
+    file_path, flags, expected_url
+):
+    TelegramPlatformAdapter = _load_telegram_adapter()
+    adapter = TelegramPlatformAdapter(
+        make_platform_config("telegram"),
+        {},
+        asyncio.Queue(),
+    )
+    sticker = _make_sticker(file_path, thumbnail_path=_THUMBNAIL_URL, **flags)
+    update = create_mock_update(message_text=None, sticker=sticker)
+
+    result = await adapter.convert_message(update, _build_context())
+
+    assert result is not None
+    images = [c for c in result.message if isinstance(c, Comp.Image)]
+    assert len(images) == 1
+    assert images[0].url == expected_url
+    assert result.message_str == "Sticker: 🙄"
+
+
+@pytest.mark.asyncio
+async def test_telegram_animated_sticker_without_thumbnail_skips_image():
+    TelegramPlatformAdapter = _load_telegram_adapter()
+    adapter = TelegramPlatformAdapter(
+        make_platform_config("telegram"),
+        {},
+        asyncio.Queue(),
+    )
+    sticker = _make_sticker(_ANIMATED_URL, is_animated=True, thumbnail_path=None)
+    update = create_mock_update(message_text=None, sticker=sticker)
+
+    result = await adapter.convert_message(update, _build_context())
+
+    assert result is not None
+    assert not any(isinstance(c, Comp.Image) for c in result.message)
+    assert result.message_str == "Sticker: 🙄"
+
+
 @pytest.mark.asyncio
 async def test_telegram_voice_message_creates_record_component(tmp_path):
     TelegramPlatformAdapter = _load_telegram_adapter()