✨ 添加 img_to_png 方法

nonebot_plugin_tetris_stats/utils/image.py

@@ -0,0 +1,62 @@
+from base64 import b64encode
+from io import BytesIO
+from typing import Literal, overload
+
+from nonebot_plugin_userinfo import UserInfo  # type: ignore[import-untyped]
+from PIL import Image
+
+
+@overload
+async def get_avatar(user: UserInfo, scheme: Literal['Data URI'], default: str | None) -> str:
+    """获取用户头像的指定格式
+
+    Args:
+        user (UserInfo): 要获取的用户
+        scheme (Literal['Data URI']): 格式
+        default (str | None): 获取不到时的默认值
+
+    Raises:
+        TypeError: Can't get avatar: 当获取不到头像并且没有设置默认值时抛出
+        TypeError: Can't get avatar format: 当获取到的头像无法识别格式时抛出
+
+    Returns:
+        str: Data URI 格式的头像
+    """
+
+
+@overload
+async def get_avatar(user: UserInfo, scheme: Literal['bytes'], default: str | None) -> bytes:
+    """获取用户头像的指定格式
+
+    Args:
+        user (UserInfo): 要获取的用户
+        scheme (Literal['bytes']): 格式
+        default (str | None): 获取不到时的默认值
+
+    Returns:
+        bytes: bytes 格式的头像
+    """
+
+
+async def get_avatar(user: UserInfo, scheme: Literal['Data URI', 'bytes'], default: str | None) -> str | bytes:
+    if user.user_avatar is None:
+        if default is None:
+            msg = "Can't get avatar"
+            raise TypeError(msg)
+        return default
+    bot_avatar = await user.user_avatar.get_image()
+    if scheme == 'Data URI':
+        avatar_format = Image.open(BytesIO(bot_avatar)).format
+        if avatar_format is None:
+            msg = "Can't get avatar format"
+            raise TypeError(msg)
+        return f'data:{Image.MIME[avatar_format]};base64,{b64encode(bot_avatar).decode()}'
+    return bot_avatar
+
+
+def img_to_png(image: bytes) -> bytes:
+    """将图片转换为 PNG 格式"""
+    result = BytesIO()
+    with Image.open(BytesIO(image)) as img:
+        img.save(result, 'PNG')
+    return result.getvalue()